Title: Two-point modulator arrangement and use thereof in a transmission arrangement and in a reception arrangement
Application Number: 200410063512 Application Date: 2004.07.08
Publication Number: 1578113 Publication Date: 2005.02.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03C3/09
Applicant(s) Name: Infineon Technologies AG Address:
Inventor(s) Name:
Attorney & Agent: zhang xuemei zhang zhicheng
Abstract:
     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 signal processor (10) is supplied as an analog signal at the input of the oscillator (5) in the PLL (1) and as a digital modulation signal on a frequency divider (7). For the purpose of pulse shaping the digital modulation data, a digital filter (12) is provided that is coupled to the control input of the frequency divider (7) and, in line with the principle proposed, is operated at the same, constant clock frequency as the signal processor (10), regardless of the reference frequency (23). As a result, no resynchronization of the digital modulation data is necessary upstream of the digital filter.
Time: 15