Method and apparatus for automatic gain control

Details Method and apparatus for automatic gain control Method and apparatus for automatic gain control

1995-12-18

1999-11-09

Pham, Chi H.

Pulse or digital communications

Receivers

Automatic gain control

375344, 331 44, 331158, 455115, 455116, 455117, H04L 2708, H03B 530, H03C 162, H01Q 1112

Patent

active

059828242

ABSTRACT:
In a preferred embodiment, a gain control circuit employs variable gain circuitry and a variable frequency converter, both controlled by a processor. The processor controls the carrier frequency of an RF modulated output signal of the circuit by controlling the frequency converter. The processor also preferably controls the gain of the variable gain circuitry as a function of both the output carrier frequency and temperature, as measured by a temperature sensing element. Preferably, the gain is controlled to maintain a constant gain over specified operating frequency and temperature ranges. The gain control circuit can be employed within a transceiver of a wireless communication terminal. Similar gain control circuitry can be utilized within a base station transceiver in which frequency channels are dynamically allocable among a plurality of gain-controlled amplification circuits.

REFERENCES:
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patent: 5107225 (1992-04-01), Wheatley, III et al.
patent: 5222104 (1993-06-01), Medendorp
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patent: 5392005 (1995-02-01), Bortolini et al.
patent: 5408697 (1995-04-01), Price et al.
patent: 5423070 (1995-06-01), Vaisanen et al.
patent: 5471654 (1995-11-01), Okazaki et al.
patent: 5659884 (1997-08-01), Daughrty, Jr. et al.

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