Active filter circuit with dynamically modifiable gain

Details Active filter circuit with dynamically modifiable gain Active filter circuit with dynamically modifiable gain

2005-10-25

2005-10-25

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C330S151000, C330S149000

Reexamination Certificate

active

06958644

ABSTRACT:
A signal processing system (100) comprises an input terminal (102), and a main path having a main filter input gain unit (126) coupled to said input terminal (102), a main filter (132) and an output gain unit (138). An auxiliary path includes an auxiliary filter input gain unit (106) coupled to the input terminal (102), an auxiliary filter (112) and an auxiliary filter output gain unit (118). An adder (144) is coupled to the output gain units (118, 138) for generating an output signal to an output terminal (148). The gains of the gain units are adjusted by a control unit (18) responsive to a detecting signal from a detector (160).

REFERENCES:
patent: 5724433 (1998-03-01), Engebbretson et al.
patent: 6072885 (2000-06-01), Stockham, Jr. et al.
patent: 6078796 (2000-06-01), Ling
patent: 6359508 (2002-03-01), Mucenieks
patent: 6727751 (2004-04-01), Yonenaga et al.

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