Method and apparatus for generating multiple signals at multiple

Details Method and apparatus for generating multiple signals at multiple Method and apparatus for generating multiple signals at multiple

1995-12-04

1997-05-13

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455265, 327105, 327147, 331 2, 375376, H04B 114

Patent

active

056302223

ABSTRACT:
A frequency synthesizer (100) is used for generating a plurality of signals operating at a plurality of frequencies that are integer multiples of a reference frequency. The frequency synthesizer (100) includes a plurality of phase lock loops coupled to a single phase error detector. The phase error detector (103) is connected to a reference signal (104), a first generated signal (116) and a sampler signal (136) derived from a second generated signal (132). The phase error detector (103) includes a shared counter (118), and first and second registers (106, 122) connected to the output of the shared counter (118). First and second phase lock loops (101, 105) are used for phase locking to the reference signal (104). The first and second phase lock loops (101, 105) derive phase error signals from the first and second registers (106, 122), thereby adjusting the first and second generated signals (116, 132).

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