Digital automatic gain control

Details Digital automatic gain control Digital automatic gain control

1995-05-31

1997-10-21

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

330136, H03G 330

Patent

active

056800754

ABSTRACT:
A digital automatic gain control system includes an envelope detector coupled to a system input for converting an AC input signal into a DC output signal. An analog-to-digital converter has an input coupled to receive the output signal of the envelope detector and an output coupled to a digital register controlled by a digital control circuit. A programmable gain amplifier has control inputs coupled to receive an output of the digital register for controlling the gain of the programmable gain amplifier such that the signal level at a system output of the programmable gain amplifier remains substantially constant as the signal level at the system input varies within a specified dynamic range.

REFERENCES:
patent: 3969683 (1976-07-01), Fabricius
patent: 4101841 (1978-07-01), Okada et al.
Jack Smith; Modern Communication Circuits; 1986; pp. 188-189; Automatic Gain Control; Mc-Graw-Hill Book Company.
Braquet et al, "Digitally Controlled Automatic Gain Control Circuit", IBM Technical Disclosure Bulletin, vol. 18, No. 6, Nov. 1975, p. 189.

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