Hybrid automatic gain control (AGC)

Details Hybrid automatic gain control (AGC) Hybrid automatic gain control (AGC)

2007-05-22

2007-05-22

Nghiem, Michael (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Circuit tuning

Reexamination Certificate

active

11202417

ABSTRACT:
A method of automatic gain control in both analog and digital domain is performed by receiving an incoming analog signal, determining an overall gain factor, determining a coarse analog gain control value and a fine digital gain control value, each of which, when taken together substantially equals the already determined overall gain factor, modifying the incoming analog signal using the coarse analog gain control value to form a coarsely adjusted digital signal, digitizing the coarsely adjusted digital signal, and using the fine digital gain control value to process the coarsely adjusted digital signal to form an outgoing digital signal, wherein the outgoing digital signal has been modified in both the analog domain and subsequently in the digital domain to achieve an appropriate signal to noise ratio.

REFERENCES:
patent: 4213097 (1980-07-01), Chiu et al.
patent: 5677962 (1997-10-01), Harrison et al.
patent: 2004/0075771 (2004-04-01), Miyabayashi
patent: 2 229 333 (1990-09-01), None

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