Power supply circuit an operational amplifier generates a power supply potential from a reference potential. An impedance adjuster adjusts an output impedance of the operational amplifier in accordance with a...
3
200610171987
Device and method for controlling a voltage control signal A device is disclosed that includes an amplification part for a linear transmitter, the amplification part being configured to amplify a transmission signal in accordance with a supply vo...
4
200610164198
Switching regulator Provided is a switching regulator having an improved power supply voltage variation response characteristic while maintaining the stability of an output voltage to oscillation. An output ...
5
200610169303
Class D amplifier A class D amplifier is provided that is capable of reducing distortion of a specific sampling frequency, and frequencies that are multiples of this frequency to a level where an LPF is no...
6
200610169487
RF amplifier circuit and operation method thereof The invention provides a RF amplifier circuit for amplifying an input signal and a operating method thereof. The amplifier circuit comprises an amplifying transistor circuit having a powe...
Low voltage low power class A/B output stage A CMOS class A/B output stage provides the advantages of high speed operation, low supply voltage requirements, and low quiescent current draw, resulting from the use of subthreshold bias...
9
200610163792
Semiconductor integrated circuit A semiconductor integrated circuit is provided with a signal processing circuit which operates based on a first reference voltage and processes a voice signal, an output amplifier which a...
Stabilization circuit and multiband amplification circuit A stabilization circuit 100 which comprises: serial stabilization blocks 110, 120 connected in series, with respect to a signal to be amplified, with an amplification element; parallel st...
Accurate pure AC voltage/current convertor with low noise A pure AC voltage-current inverter of precise low noise type is prepared as carrying out stopping treatment on input voltage by stopping circuit then coupling said voltage to positive and...
14
200610172860
Digital log amplifier for ultrasonic testing The apparatus and method of the present invention provides a plurality of linear amplifiers simultaneously processing an ultrasonic signal. Each amplifier of the plurality of linear ampli...
15
200610137973
High-bandwidth high-gain amplifier A pipelined analog to digital converter comprises a first stage that receives an input voltage, that generates a first sampled digital value and a first residue voltage, and that includes...
16
200610143146
Wide-band amplifier An amplifier that achieves impedance matching in a wide frequency band is provided. The wide-band amplifier includes a first n-type metal oxide semiconductor (NMOS) transistor which recei...
17
200610143117
Differential amplifiers and semiconductor circuit Differential amplifiers comprise a differential input stage, first, second, third, and fourth fixed current sources, a first resistive element, and a current-folding element. Due to topol...
18
200610150469
Amplifiers with compensation The present invention disclosed an amplifier system which includes a first amplifier, a second amplifier, a first capacitance, and a first transistor. The first amplifier has an input and...
19
200610150399
Filtering free circuit class D power amplifier A double reference wave modulation scheme for filterless power amplifiers is disclosed for reducing EMI. In the filterless power amplifier, differential outputs for driving load impedance...
20
200610137974
High-bandwidth high-gain amplifier An amplifier circuit includes a first transistor having a control terminal that receives a first amplifier input, a first terminal, and a second. The amplifier circuit includes a transimp...
21
200610150468
Amplifiers with compensation An amplifier circuit comprises a first operational transconductance amplifier (OTA) has an input that communicates with the output of the first amplifier. A third amplifier has an input t...
Output offset protection for power amplifier A output offset protection circuit provides protection of the load and the power amplifier through monitoring the temperature of the power transistor in the operational amplifier to detec...
24
200610150934
Voltage-current conversion circuit device This invention relates to a conversion circuit device from voltage to current including an operational amplifier U1, a transistor Q, a reference resistor R1, a load resistor R2 and a supp...
25
200610142967
Power amplifier with high gain and high efficiency An amplifier has a main amplifier circuit with multiple amplification stages, including a driving stage and an auxiliary amplifier circuit with multiple amplification stages, including a ...
Amplifier device The present invention provides a first control unit (14) controlling the bias exerted to a peak amplifier (5) to perform the following operations: (a) the peak amplifier (5) is made C cla...
Differential amplifier A differential amplifier includes an amplification unit and a feedback unit. The amplification unit amplifies a voltage difference between a first input signal and a second input signal a...
31
200610142078
High frequency power amplifier A radio frequency power amplifier, having a first amplifying transistor 103 - 1 and a second amplifying transistor 103 - 2 , comprises a detection circuit 101 that detects an output power...
32
200610141215
Variable gain RF amplifier A CMOS RF variable gain amplifier with an extended linear tuning range is disclosed. The variable gain amplifier employs a wide swing cascode mirror formed by two cascode transistors and ...
33
200610141503
Class d amplifier A class D amplifier includes: an amplifier that generates a digital signal for driving a load based on an input signal; an attenuator that attenuates the input signal according to an atte...
34
200610159395
Open-loop slew-rate controlled output driver A slew-rate controlled output driver for use in a semiconductor device includes: a process, voltage and temperature (PVT) variation detection unit having a delay line for receiving a refe...
35
200610154349
Speaker protection circuit This speaker protection circuit includes: a voltage comparator that compares a voltage of a reference bias terminal of an amplifying circuit constituting a BTL amplifying device with a pr...
Offset canceller An offset canceller outputs a signal during its offset compensating operation and compensates for the offset by capacitance or resistance devices connected externally to an operational am...
Dual mode front end module and mobile terminal having the same A mobile terminal includes a dual-mode front end module (FEM) that has an antenna switch module (ASM), a first filtering unit for filtering signals outputted from the ASM, a SPDT switch, ...
41
200610139638
Operational amplifier An operational amplifier includes a differential amplifier circuit, receiving a low voltage signal, and a current mirror circuit provided on the downstream. The differential amplifier cir...
42
200610139852
Amplifier circuit The invention provides an amplifier circuit with digital mode capable of preventing output signal from effect of change of a power supply votlage VDD, restraining power loss and increase ...
43
200610121633
Differential operational amplifier To provide a differential operational amplifier capable of suppressing deterioration in a distortion rate and reducing power consumption. The differential operational amplifier for output...
44
200610021699
RF fundamental neutralizing circuit of adapting to power This invention discloses a RF fundamental counteract circuit adapting to power including adjustable attenuators 11 and 12, coupler 14, detector 15 and a compensation control circuit 16, i...
Amplifier circuit improved in linearity and frequency band An amplifier circuit improved in linearity and frequency band comprises an amplification block, a feedback block and an output block. The amplification block comprises a main transistor, ...
47
200610121370
Cascode circuit The invention obtains a cascode connection circuit in which manufacturing cost can be reduced by suppressing a variation caused by an optimal operation capacity. The cascode connection ci...
48
200610126236
Current-controlled cmos delay cell with variable bandwidth Current-controlled CMOS (C3MOS) fully differential integrated delay cell with variable delay and high bandwidth. A novel implementation includes a wideband differential transistor pair an...
49
200610114838
Chopper amplifier circuit and semiconductor device Provided is a chopper amplifier circuit capable of reducing an offset voltage of a sensor bridge and temperature characteristics of the offset voltage. An offset adjusting voltage generat...
50
200610114944
Push-pull amplifier with transformational negative feedback The push-pull amplifier with transformational negative feedback is provided for amplification of variable electrical signals. It includes a signal input and a signal output, a transformat...
Harmonic intensified radio-frequency low noise amplifier The invention is a resonance enhanced radio frequency low noise amplifier, belonging to the technical field of integrated circuit design and signal conditioning. And common source-common ...
53
200610110067
BTL-type amplifier circuit The invention provides an amplifier circuit of BTL system comprises a first operational amplifier 1 delivering an output signal which is in-phase with a signal inputted to a signal input ...
Semiconductor power device and RF signal amplifier A semiconductor power device comprises a flange, a die having a gate, a source, and a drain. The source is electrically coupled to the flange. A drain matching circuit is located on the f...
56
200610136399
Output match transistor A power transistor, having: a semiconductor having an electrode formed thereon, wherein the electrode comprises a plurality of interdigitated transistors each having input and output term...
57
200610105971
Radio frequency amplification apparatus An intermodulation distortion which is output from a final-stage amplifier 15 is fed back to an inter-stage matching circuit 14 via a first control circuit 16 and a second control circuit...
58
200610107728
Adaptive digital pre-distortion system An adaptive Digital Pre-distortion System and a method for correcting especially power amplifier memory effects. In particular, the invention relates to an electronic circuit, for amplify...
59
200610109061
Current-controlled cmos wideband amplifier/equalizer circuit Current-controlled CMOS (C3MOS) fully differential integrated wideband amplifier/equalizer with adjustable gain and frequency response without additional power or loading. A novel approac...
60
200610041085
High accuracy low distorsin pulse power amplifying circuit This invention discloses a pulse power amplifying circuit of high accuracy and low distortion including a DC regulation circuit and a pulse amplifying circuit, in which, a swith regulatio...
61
200610106299
High-frequency power amplifier In a base-bias-control-type high-frequency power amplifier with a plural stage configuration, a rising voltage of a base bias current supplied to an initial stage transistor is made lower...
Methods and apparatus of managing a power amplifier The invention discloses a methods and apparatus of managing a power amplifier. In the present technique for power management of a power amplifier, it is first determined ( 314 ) whether a...
64
200610105520
Constant current circuit A constant current circuit that generates a constant output current corresponding to an input voltage, comprises a differential amplifying unit to which the input voltage and a feedback v...
65
200610101729
Variable transconductance circuit A variable transconductance circuit is provided in the invention. The variable transconductance circuit includes: a voltage-current conversion circuit for outputting a current signal line...
66
200610036439
Fold line type signal buffer circuit This invention discloses a fold-line signal isolation circuit including a voltage primary circuit generating a precise voltage, a voltage comparator comparing input voltage and the primar...
67
200610101584
Methods and apparatus of managing a power amplifier In the present technique for power management of a power amplifier, an amplifier bank from a plurality of amplifier banks in a power amplifier that has been switched off for a longest per...
68
200610163916
Power output stage A class D power output stage for switching a supply voltage comprises a limiting transistor with a controllable path and a control terminal, a complementary limiting transistor with a con...
69
200610095783
Miller-compensated amplifier A Miller-compensated amplifier, having an amplifier input and an amplifier output, comprises a first gain stage, a second gain stage, a third gain stage, and a capacitor. The first gain s...
70
200610128511
Predistortion amplifier for compensating distortion A predistortion amplifier for compensating distortion includes an amplifying unit; a power detection unit; a distortion compensation table; a control unit; and a predistortion unit for ge...
71
200610092289
Amplifier with feedback bridge An amplifier, in particular for RF-applications, comprises a circuit board (2), at least one amplifier stage with at least one transistor package (8) arranged on the circuit board (2), an...
72
200610093538
Feedforward distortion compensation amplifier The invention solves the problem of a conventional feedforward distortion compensation amplifier wherein balancing of loop is collapsed by abrupt fall in level to cause variation in total...
High-frequency power amplifying circuit
The invention discloses a high-frequency power amplifying circuit, which consists of modulator and power amplifier, wherein the modulator includes signal amplification circuit, add circu...
Band selection type feed forward amplifier
The present invention has for its object to provide, in an environment where plural radio systems coexist, a feed forward amplifier capable of adaptively selecting a frequency band. The ...
Multi-band lookup table type predistorter
A lookup table type predistorter for reading out distortion compensation data by using a difference signal between a power amplifier input signal and an output signal as a reference sign...
79
200610092450
Comparator with multiple gain stages A fast, accurate, low offset comparator may be configured with multiple gain stages. A low gain, low input impedance, and fully differential common-gate amplifier may be configured as a f...
Distortion cancellation in a transimpedance amplifier circuit
An optical receiver for use in an optical communications system in which an analog signal is transmitted over an optical fiber including a housing with a photodetector (PD1) coupled to t...
82
200610092336
Feed forward amplifier for multiple frequency bands
The present invention has for its object to provide, in an environment where plural radio systems coexist, a feed forward amplifier for multiple frequency bands, capable of adaptively se...
83
200610081798
Operational amplifier with less offset voltage
This present invention relates to an operational amplifier includes a differential pair section; a load section configured to function as active load of the differential pair section; an...
84
200610040341
Multi-mode digital linearization device and method
The invention relates to a multimode digit liner method of multimode digit liner device, which can be used in the base station of mobile communication network, to improve the linearity o...
85
200610084725
Radio frequency power amplifier
A radio frequency signal (RF) is input to a base of each of transistors (TR1 through TRn) via a corresponding capacitor among capacitors (C1 through Cn), is amplified, and is output from...
86
200610078564
Integrated wide bandwidth attenuating-and-amplifying circuit
An attenuating-and-amplifying circuit and method for producing a voltage-adjusted output signal of an input signal uses a voltage divider and a number of switchable amplifier units conne...
87
200610082727
Power series predistorter and control method thereof
In a distortion generation path of a power series predistorter, a frequency characteristic compensator that adjusts the frequency characteristic of a distortion component is provided in ...
88
200610079994
Multi-band amplifier for test and measurement instruments
A multiband amplifier for a test and measurement instrument includes a splitter to split an input signal into split signals, amplifiers, and means for combining and digitizing the amplif...
89
200610077321
Signal output circuit
The signal output circuit 1 includes a first and a second emitter follower circuit, and a comparator 20 . The comparator 20 receives output signals from the first and the second emitter ...
Digital analog circuit, digital driver and display device
The invention relates to a digit analogue converter and display device which can output voltage with high accuracy, even the difference between two voltages are large. Wherein, it compri...
92
200610026115
Cross coupling C-type radio frequency power amplifier
This invention relates to a cross coupled C-kind RF power amplifier composed of three stages, in which, the first and the second are the stages of pre-drive amplification amplifying the ...
93
200610077220
Off-set correcting circuit and operational amplifier circuit
The present invention provides an offset adjusting circuit and an operational amplifier circuit. In the operational amplifier circuit ( 1 ), a switching element (S 1 ) is closed and a sw...
94
200610075152
Differential amplifier and data driver for display
The invention relates to a differential amplifier, which comprises: the first and second differential couples, the switches (151, 152) and switches (153, 154) connected to the first diff...
Output circuit for amplifying and outputting the input signals
An output circuit includes a first amplifier that is supplied with power via a first power supply line that receives an input signal, and a second amplifier that further amplifies a sign...
Power amplifier with automatic switching function
A power amplifier with automatic switching functions is disclosed. The power amplifier can variably control output power of circuits as all of the circuits are operated when relatively l...
99
200610075151
Differential amplifier, data driver and display
The invention relates to a differential amplifier, which can output four different voltages to realize high-accuracy output, even when the voltage difference of two input voltage is larg...
100
200610025688
CMOS superwide band low noise discharger
This invention relates to a CMOS LNA circuit used in a UWB system receiver composed of a matching stage, a amplifying stage and a load stage, in which, the matching stage matches the sig...
