Programmable automatic signal amplitude control circuit

Details Programmable automatic signal amplitude control circuit Programmable automatic signal amplitude control circuit

2006-07-11

2006-07-11

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

Reexamination Certificate

active

07075372

ABSTRACT:
A programmable automatic signal amplitude control circuit, comprising a variable gain amplifier and a negative feedback circuit. The negative feedback circuit includes a first circuit, and a second circuit having a peak detector, a level adjustable amplifier, and a voltage/current converter, and a capacitor. Using a first current applied from the first circuit and a second current applied from the second circuit to control a control signal, signal amplitude is controlled to approach a setup amplitude.

REFERENCES:
patent: 5825239 (1998-10-01), Adal
patent: 5838194 (1998-11-01), Khoury
patent: 6674328 (2004-01-01), Uto et al.
patent: 2003/0148745 (2003-08-01), Nystrom et al.
“A Low Power Monolithic AGC with Automatic DC Offset Cancellation for Direct Conversion Hybrid CDMA Transceiver Used in Telemetering” Cheung et al.; 2001.
“A BiCMOS 300ns Attack-Time AGC Amplifier with Peak-Defect and Hold Feature for High-Speed Wireless ATM Systems” Drenski et al.; 1999.

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