Match Application Number Document Title
1 200610075270 Modulator
This invention provides a modulation device which is to modulate base frequency signal, which includes phase-splitter, low pass filter and adjustor. The phase-splitter produces a polarit...
2 200680000421 Two-point modulation type phase modulating apparatus, polar modulation transmit...
There provides a two-point modulation phase modulation apparatus capable of obtaining an RF phase modulation signal of superior modulation precision with low power consumption and a simpl...
3 200610115601 Frequency converter and tuner
A frequency changer (3, 4) is provided for a radio frequency tuner (1-7). The frequency changer comprises a mixer (3) comprising a plurality of mixing stages (10a, 11a; 10b, 11b; 10c, 11c...
4 200680000144 Transmission modulation apparatus, communication apparatus and mobile wireless ...
A transmission modulation apparatus using a polar modulation of the two-point modulating scheme that can complete the timing adjustment of a BB phase modulation signal and a BB amplitude ...
5 200610072733 Analogue multiplier
An analogue multiplier circuit has an input coefficient voltage dependent adjustment of its frequency response. The multiplier contains a multiplier cell (MC) with an RF input (Vin , Vin...
6 200580006357 Phase modulating apparatus, communication device, mobile wireless unit, and pha...
A multimode-based phase modulating apparatus capable of reducing the degradation of modulation precision and suppressing the unnecessary power consumption. The phase modulating apparatus ...
7 200580024456 A transmit system employing an antenna and balanced amplifier architecture whic...
A transmit system is disclosed herein that includes two receive inputs for receiving input power distributed between two weakly correlated signals. The transmit system further includes a ...
8 200580025000 Ratiometric clock systems for integrated receivers and associated methods
Mixing circuitry for quadrature processing in communication systems and related methods are disclosed. The weighted mixing circuitry allows for arbitrary dividers to be utilized in genera...
9 200580023527 Modulator comprising a dual-frequency oscillator and a synthesizer
Oscillators (10) which oscillate at a fundamental frequency also generate harmonics. The fundamental frequency or a lower harmonic is used for feedback purposes, and a harmonic higher tha...
10 200520023836 Distortion adaptive high-capacity scatter communication modem
The utility model discloses a distortion adaptive high-capacity scatter communication modem. It relates to a modem device with stronger anti inter-symbol interference ability in the commu...
11 200580011486 Single and multiple sinewave modulation and demodulation techniques
A method for detecting encoded digital data from a substantially sinusoidal waveform, the encoded digital data having one of a first value and a second value at selected phase angles thet...
12 200510052956 The double spot modulating type frequency modulation device, wireless transmit ...
A two-point frequency modulation apparatus is provided that reduces input timing difference and improves modulation accuracy. Two-point frequency modulation apparatus 10 has: PLL circuit...
13 200510054600 Frequency modulation device
A frequency modulation apparatus 100 has a synthesizer 101 , a differentiator 102 that differentiates phase modulation data and generates differential phase modulation data, an adder 103...
14 200580012344 Programmable radio transceiver
A fully integrated, programmable mixed-signal radio transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and out...
15 200580006038 PLL circuit
[PROBLEMS] To reduce EMI noise by use of a simple arrangement. [MEANS FOR SOLVING PROBLEMS] A PLL circuit comprising a control part for switching, at predetermined timings, the validity/i...
16 200580006425 Transmitter apparatus and wireless communication apparatus
A transmitter apparatus capable of performing a high-efficiency polar coordinate modulation, while maintaining a good distortion characteristic. In the case of causing a large power ampli...
17 200510007839 Transmission circuit
A transmission circuit capable of transmitting a modulated wave signal using polar modulation in a broad band and with low power consumption is provided. The transmission circuit generat...
18 200580003550 Adjusting circuit
The invention relates to an adjusting circuit for adjusting an amplitude of a radio frequency signal. The adjusting circuit comprises a plurality of terminals for input and output, a matc...
19 200480027342 Amplifier power control in frequency hopping applications and methods
A method in an amplifier, for example, a power amplifier in a wireless transmitter, including monitoring (310) a characteristic of the amplifier during a first active interval of the fir...
20 200480034081 Outphasing modulator
Briefly, an apparatus having an outphasing modulator that may provide at least first and second outphased signals to a power amplifier. The outphasing modulator may control amplitude of ...
21 200480037460 Radio device
A mobile device is used for receiving supplementary information transmitted with a radio station signal, said mobile device comprising: means for scanning a spectrum of frequencies; means...
22 200480024134 Wide-band modulation PLL, timing error correction system of wide-band modulatio...
A wide-band modulation PLL, a timing error correction system of the wide-band modulation PLL, a timing error correction method and a method for adjusting a radio communication apparatus ...
23 200480024445 Subcarrier and bit allocation for real time services in multiuser orthogonal fr...
The method of the present invention provides efficient resource allocation in terms of subcarrier, bit and corresponding power of QoS for real time services in multiuser OFDM systems. The...
24 200410063512 Two-point modulator arrangement and use thereof in a transmission arrangement a...
The present invention provides a two-point modulator arrangement with a PLL (1) that can be operated at various reference frequencies (23). A modulation signal provided by a digital sign...
25 200480023408 Broadband modulation pll, and modulation factor adjustment method thereof
A broadband modulation PLL having an excellent modulation accuracy is provided at a low cost. A PLL includes a VCO (21), a frequency divider (22), a phase comparator (23), a charge pump ...
26 200480020711 Frequency selective transmit signalweighting for multiple antenna communication...
A system and method for generating transmit weighting values for signal weighting that may be used in various transmitter and receiver structures is disclosed herein. The weighting value...
27 200480001156 Modulator and correction method thereof
It is possible to maintain conformance of frequency characteristic and prevent lowering of modulation accuracy in a wide band modulator using a PLL synthesizer even when manufacturing irr...
28 200410063767 Modulation circuit device, modulation method and radio communication device
The amplitude modulator comprises: an angle modulator for angle-modulating a phase signal to be inputted; a waveform shaping means in which, (1) when the magnitude of an amplitude signal...
29 03135973 Voltage-controlled oscillator, radio communication equipment and method of volt...
Provided is a voltage controlled oscillator that is capable of suppress a deterioration in phase noise characteristics, and does not reduce the trackability of a control potential, a wire...
30 200380103933 Apparatus and method for wideband signal processing
An apparatus for electromagnetic processing comprises a modulator for generating one or more elements representative of an input signal; a divider controlled by the one or more elements a...
31 200380102997 Electromagnetic wave transmitter systems, methods and articles of manufacture
An electromagnetic wave transmitter system includes a receiver and a transmitter. A baseband processor receives a signal transmission and converts the signal into amplitude and phase pola...
32 03160340 Amplitude-modulation antenna of noise reduced
An AM radio antenna circuit having a ferrite bar loop antenna comprises a resonating structure forming a balanced antenna circuit, a varactor diode tuning structure presenting a controll...
33 03820346 Method of modulation gain calibration and system thereof
A wideband impedance attenuator includes a phase-locked loop filter, a voltage-controlled oscillator connected to the phase-locked loop filter during transmit, and an impedance circuit c...
34 03819269 Voltage control oscillator having modulation function
There is provided a VCO having a modulation function capable of easily constituting a correction circuit which can obtain a predetermined modulation degree even when element irregulariti...
35 03814791 Circuit arrangement provided with a phase-locked loop and transmitter-receiver ...
The invention relates to a circuit arrangement provided with a phase locked loop (1), which can be used particularly as a mobile-radio transmitter. The reference frequency of the PLL (1)...
36 03802195 Method and apparatus of compensating imbalance of a modulator
Briefly, a method and apparatus to compensate an imbalance of a modulator by providing calibration parameters to a calibration network. The modulator may receive a pair of predetermined s...
37 03805987 Transmitter arrangement for frequency modulation
A transmission arrangement includes a step-up frequency mixer that converts a modulation signal to a transmission frequency. The step-up frequency mixer is arranged within a phase locked ...
38 03120547 Frequency modulator, frequency modulation method and radio line
A voltage controlled oscillator (1), a variable frequency divider (2), a phase comparator (3), and a loop filter (4) form a Phase Locked Loop (PLL). A sigma-delta modulator 5 sigma-delta ...
39 03812886 Linearity improvement of gilbert mixers
Method and system are disclosed for providing an improved linearity Gilbert mixer. The Gilbert mixer of the ivention includes a convenional mixer core coupled to a high linearity multius...
40 03804330 DSP-based variable aperture code generation technique
Variable Aperture Coded (VAC) signals for VAC modulation are advantageously generated by a digital signal processor (12) that yields a VAC signal having a single narrow in the positive fr...
41 03806138 Frequency conversion circuit arrangement and mobile radio comprising said circu...
A frequency conversion circuit arrangement is disclosed providing a complex output signal at its output. The circuit comprises two frequency mixers that are driven, on the one hand, by an...
42 03805521 Method and system for implementing smart antennas and diversity techniques
Method and apparatus for transfer of signals from multiple antennas down to baseband over a common radio frequency (RF) chain. Antenna selection having greater flexibility and applicabili...
43 03805937 Transceiver using a harmonic rejection mixer
A wireless transceiver includes a transmitter having a harmonic rejection mixer and an RF output phase-locked loop in a two step up-conversion architecture, and a direct conversion receiv...
44 03804340 Method for trimming a two-point modulator, and a two-point modulator having a t...
Disclosed is a PLL circuit (1) which is tuned to a first frequency by means of a digital modulation signal (28) and then to a second frequency by deactivating the digital modulation signa...
45 02827800 High data rate wireless communication system
A high data rate communication system operating at frequencies greater than 70 MHz and at data rates of about 1.25 Gbps or greater. Preferred embodiments include modulators with a resonan...
46 03803802 Single point modulator having a PLL circuit
The invention relates to a point modulator (1) comprising a PLL circuit (2). A programmable frequency distributor (7) is arranged in the feedback branch of the PLL circuit (2), the contro...
47 02823956 Device including a circuit with adjusting means for adjusting at least one char...
In a device (1) with a circuit (2) for generating a modulated signal (S) is provided a modulation device (9; 59) which is intended to receive a data signal (DS) and generate the modulated...
48 02823449 Alternate timing signal for a vestigial sideband modulator
A remodulator timing signal (35) is generated by a phase locked loop (33) which is coupled to a broadcast vestigial sideband signal (5). Within the signal (5) is highly accurate timing d...
49 02825236 Corrective phase quadrature modulator system and method
A system and method for producing a phase corrected M-QAM signal is described. In one embodiment, a phase-correcting M-QAM modulator comprises a feedback loop for dynamically adjusting t...
50 02130172 Method for switching grouped signal in different frequency system and its switc...
A method for convering group signals in different frequency system and its devices, wherein the converting circuit mainly includes a plurality of phase generators that contain the first ...
51 02130195 Stereo synthetic coder (MPX) for FM transmission
A stereo multiplex encoder (MPX) for FM transmission with a digital signal processor utilizes residual sideband modulation in stereo transmission instead of the conventional double sideba...
52 02142817 Modulation method and device for executing Nyquist folding frequency
A method and apparatus for re-modulating an RF carrier modulated signal using a Nyquist folding frequency modulation technique. The method modulates a digitized RF carrier modulated signa...
53 02818991 Compensating method for a pll circuit that functions according to the two-point...
A PLL circuit (1) is tuned to a first frequency (F1) by using a first digital modulation signal (6) and is subsequently tuned to a second frequency (F2) by using a second digital modulat...
54 02819714 Radio pulse communications systems
Frequency modulation switching apparatus for rapidly increasing and decreasing the frequency within radio-frequency pulses of radio wave pulse trains transmitted by an antenna having ser...
55 02111821 Feedback modulating circuit
A feedback modulation circuit for increasing the card reading distance by 1.5-2 times is composed of a resonant circuit consisting of resonant capacitor and resonant antenna for obtainin...
56 02121365 Positive and negative semi-cycle two-path amplitude modulation technology and m...
The present invention relates to a wireless signal amplitude-modulated transmission technology and an electric circuit associated with the modulation and the demodulation device. The inv...
57 02814878 Method and device for compensating phase error in receiver and/or transmitter s...
The invention relates to a method for compensating a phase error in a receiver and/or transmitter system with in-phase I and quadrature Q signal processing branches. The phase corrected ...
58 02814624 Circuit arrangement for regulation of direct component of a signal and mobile r...
A circuit arrangement for regulating a signal DC component is specified, which is connected to an input of a frequency mixer (1). The regulation comprises a common-mode signal component ...
59 02806852 System for controlling class D amplifier
Communications systems, and particularly portable personal communications systems, such as portable phones, are becoming increasingly digital. The tendency towards digital systems has co...
60 02811385 Two-point modulator comprising PLL circuit and simplified digital pre-filtering...
The invention relates to a two-point modulator (1) comprising a PLL circuit (2). Said two-point modulator (1) comprises a first circuit branch for injecting an analog modulation signal (...
61 02804016 Method and apparatus for compensation of cross modulation effects
The present invention relates generally to a method and apparatus for cross modulation compensation in RF devices giving rise to cross modulation. A test signal as well as a wanted signal...
62 02808292 Power oscillator for control of waveshape and amplitude
An RF power oscillator for contactless card antennas shapes a carrier signal at the operating frequency utilizing a delay circuit having a number of taps for delaying the carrier signal ...
63 02805438 Trimming method and trimming device for a pll circuit for two-point modulation
In the case of a trimming method for a PLL circuit operating based on the principle of a two-point modulation, the PLL circuit is locked without any modulation being impressed and then a...
64 01820617 System and method of RF power amplification
A radio frequency power amplifier circuit provides linear amplitude modulation of a radio frequency output signal while operating in a saturated amplification mode. The power amplifier c...
65 01822474 Compensation method for a transceiver using two-point modulation
In a method for amplitude trimming in transceivers having a PLL circuit operating on the two-point modulation principle, the amplitude of an analog modulation signal is selected on the b...
66 02803762 Signal processing of an amplitude-modulated and/or phase-modulated high frequen...
The invention indicates a method for signal processing of an amplitude-modulated and/or phase-modulated high-frequency signal (RF signal), in which the RF signal is broken down into two ...
67 01820267 Quadrature generator with image reject mixer
In an exemplary application, an apparatus according to a disclosed embodiment receives a radio frequency signal and outputs an intermediate frequency signal. Rejection of image component...
68 01818390 Direct digital amplitude modulator
Various embodiments of a direct digital amplitude modulator (DDAM) for modulating radio frequency (RF) or intermediate frequency (IF) or baseband signal with the invented interpolation t...
69 01813798 Frequency modulator using a waveform generator
A Multi-mode Loop Frequency modulator (10) for modulating a carrier signal according to various modulation pulse shapings and data signal to provide a modulated output signal (VCOout), co...
70 01817071 Method and circuit to generate sinusoids for modulators and frequency converters
A signal generator includes first and second mixers, first and second phase shift networks, and a summer. The first and second mixers respectively receive and mix a quadrature and an inp...
71 01117223 Transmitter and method for producing transmitting signals
The present invention can improve a conventional transmitter for generating a transmission signal and its method by reducing expenses needed to filter the transmission signal because of t...
72 01117821 Transmitter and method for producing transmission signal
The invention relates to a transmitter and a method of generating a transmission signal, which transmitter includes a modulation device (110) for generating two uncompensated transmission...
73 01121849 Fm signal oscillation circuit and modulation level correcting method
An FM signal oscillator circuit includes a resonator having a graded- or abrupt-junction variable capacitance diode that is producible through standard IC manufacturing processes but caus...
74 00131624 Method and device for calibrating FM PLL
In accordance with the present invention, a frequency modulating phase-locked-loop (FMPLL) architecture is implemented. The frequency of the FMPLL is controlled using a current controlled...
75 00816668 Transmitting device
The invention relates to a transmitting device in which a modulation signal is produced according to data to be transmitted, a transmission frequency generation device (9) being controlle...
76 00817767 Dielectric resonator oscillator and voice control device
The invention relates to a dielectric resonator oscillator, comprising a dielectric resonator (4) which is contained in a resonant cavity (2) for generating a signal that oscillates at a ...
77 00801654 Fractional-N frequency synthesiser
A fractional-N frequency synthesizer for use in a transmitter for transmitting TDMA signals, comprises a fourth order sigma-delta modulator (16) having an input for digitized signals, a F...
78 00124079 Phase-locked loop frequency synthesizer
A phase-locked loop frequency synthesizer includes circuitry which determines the real gain of a voltage-controlled oscillator from at least one measurement parameter and delivers a signa...
79 00814432 Radio transmitter architecture comprising PLL and delta-sigma modulator
The transmitter circuit architecture is disclosed based on a phase lock loop architecture and which uses a delta-sigma modulator with 2 point modulation. In order to restrict the bandwidt...
80 00810317 Single sideband mixer
The invention relates to a single sideband mixer for radio frequency signals which can be integrated on a uniform semiconductor substrate in a space-saving manner. The inventive single si...
81 00118118 Orthogonal modulator with integrated distributive resistance-capacitance filter
A quadrature modulator for generation of complex modulated signals includes a unique pair of balanced, low-pass filters which, through a switching arrangement for switching into and out o...
82 00807943 Method for modulating the amplitude of an antenna signal
The invention relates to a method for modulating the amplitude of an antenna signal (Sa) applied to an inductive-type antenna circuit (10) by means of a control circuit (2) comprising bin...
83 00805671 Method and apparatus for reducing oscillator noise by noise-feedforward
A circuit for reducing phase noise in a transmitted radio signal includes a first phase-locked loop (12) circuit including a first controlled oscillator (18) generating a first output sig...
84 00800501 Method and apparatus for modulating digital data
The modulator includes an oscillator generating signals, each having a different phase, and a selector receiving digital data. When the digital data received by the selector changes logic...
85 99813442 Circuit and method for I/Q modulation with independent, high efficiency amplitu...
An RF amplifier includes a phase modulator developing a phase modulated RF input signal to be transmitted. A power amplifier receives the RF input signal and amplifies the RF input signal...
86 99815388 Power 1-Q modulation systems and methods
Power IQ modulations systems and methods include first and second power amplifiers, each including a signal input, a supply input and a power input. The first and second power amplifiers ...
87 00800924 Quadrature modulator with carrier leakage compensation
A quadrature modulator with set-and-forget carrier leakage compensation. The quadrature modulator comprises an in-phase and a quadrature branch. In the in-phase and quadrature branches, r...
88 99809796 Methods and apparatus for providing robust synchronization of radio transceivers
Methods and apparatus for performing synchronization and DC-offset compensation in FM transmission systems significantly reduce the overhead associated with transmitting a conventional di...
89 99120772 Frequency hopping and pilot frequency technology using for control sytsem for d...
A control system comprising an electrical circuit that produces distortion where the electrical circuit has a frequency band of operation. A pilot modulated carrier signal is frequency ho...
90 99811811 Method and apparatus for generating linearly modulated signal polar modulation
An apparatus and method generate a linearly modulated signal in a polar modulation system. A signal for transmission is separated into a phase component and an amplitude component, and a ...
91 99804405 Direct digital synthesis of precise, stable angle modulated RF signal
An RF modulator that allows precise, stable phase shifts to be obtained. The modulator uses a PLL structure including an auxiliary feedforward path including an adaptive gain amplifier (4...
92 99804426 Demodulator circuits
A demodulator circuit for demodulating a frequency modulated input signal comprises filter means (12) for receiving an incoming input signal and for providing a filtered output signal, de...
93 99104269 Load regulation technique and its communication method
The present invention relates to a carrier modulation technique in radio communication, which features use of non-polar conversion mode to modulate amplitude, omitting the current direct...
94 98810942 Qam modulation using direct digital synthesis and upconversion
A transmitter subsystem (100 and 200) is disclosed whereby the output frequency spectrum of a DDS device (202), for use in the transmitter subsystem, is frequency multiplied to achieve gr...
95 98123005 Frequency converter circuit of tuner for cable modem
A local oscillation circuit in a frequency converter circuit includes a resonant circuit, and a differential amplifier circuit connected to the resonant circuit. The differential amplifie...
96 98812895 Digital modulation employing single sideband with suppressed carrier
A method of transmitting
97 98123930 New-type modem and its power source controlling method
One MCU unit controls the DSP unit and power source controlling unit according to the DTR signal from the serial port of the terminate and the ringing signal from far end. The present in...
98 98123867 Method and system for timed retoring and channel estimation in discrete multion...
A method and a system for acquiring data frame timing in a discrete multitone modem system in which an acquisition frame is generated having a first predetermined number of impulse signal...
99 98808909 Low noise gilbert (GILBERT) multiplier cells and quarature modulators, and rela...
A Gilber Multiplier Cell includes an emitter-coupled transistor and a pair of cross-coupled emitter-coupled transistor pairs. A filter couples the emitter-coupled transistor pair to the p...
100 98811162 A post-filtered and delta, and sigma, for controlling a phase locked loop modul...
A frequency synthesizer has a phase locked loop, a DELTA SIGMA modulator, and a filter. The phase locked loop includes a frequency divider that controls the frequency of the phase locked ...
« 1 2 » Pages: ( 1/2 total )