Wireless communications system having variable gain mixer

Details Wireless communications system having variable gain mixer Wireless communications system having variable gain mixer

2005-07-12

2005-07-12

Matar, Ahmad F. (Department: 2642)

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

C455S250100, C455S254000

Reexamination Certificate

active

06917788

ABSTRACT:
A wireless communications transceiver system and a variable gain mixer used in the wireless communications transceiver system. The differential mixed output signal of the variable gain mixer is a constant current signal. The gain of the mixer is set by selectively connecting into the input section circuit of the mixer a degeneration impedance. By maintaining the current of the mixed output signal constant, the linearity of the variable gain mixer is maintained constant and there are no changes in harmonic rejection.

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patent: 6118339 (2000-09-01), Gentzler et al.
patent: 6219531 (2001-04-01), Roberts et al.

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