Multistage modulation architecture and method in a radio

Details Multistage modulation architecture and method in a radio Multistage modulation architecture and method in a radio

2005-07-05

2005-07-05

Corsaro, Nick (Department: 2684)

Telecommunications

Transmitter

Frequency conversion

C455S112000, C455S113000, C455S260000, C455S020000

Reexamination Certificate

active

06915117

ABSTRACT:
In a multiple stage transmitter, and analog signal is modulated and mixed to produce a radio frequency output. A separate mixing frequency signal is provided to each stage. A single frequency synthesizer is used rather than a plurality of frequency synthesizers. In a two-stage system, first and second dividers each receive the output of the frequency synthesizer and deliver a mixing signal to the first and second stages respectively. The modulus of each divider may be selected to minimize spurious signals.

REFERENCES:
patent: 4081752 (1978-03-01), Sumi
patent: 4862515 (1989-08-01), Cowley
patent: 6085075 (2000-07-01), Van Bezooijen
patent: 6282413 (2001-08-01), Baltus
patent: 6356597 (2002-03-01), Jackson et al.
patent: 2001/0008384 (2001-07-01), Ku

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