Method and system for a programmable local oscillator...

Details Method and system for a programmable local oscillator... Method and system for a programmable local oscillator...

2007-09-28

2010-12-28

Pham, Tuan A (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

C455S139000, C455S147000, C455S165100

Reexamination Certificate

active

07860464

ABSTRACT:
Methods and systems for a local oscillator generator based on quadrature mixing using a phase shifter. Aspects of one method may include generating a local oscillator signal, where a frequency of the local oscillator signal may be determined by controlling a phase of in-phase (I) components and quadrature phase (Q) components of a first signal and a second signal. For example, by appropriately controlling a phase of each component that is to be mixed, the local oscillator signal may have a frequency that is the sum of a frequency of the first signal and a frequency of the second signal, or a difference of the frequency of the first signal and the frequency of the second signal.

REFERENCES:
patent: 5822704 (1998-10-01), Ishii
patent: 5950119 (1999-09-01), McGeehan et al.
patent: 5982807 (1999-11-01), Snell
patent: 6778594 (2004-08-01), Liu

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