filter circuit and semiconductor device

Details filter circuit and semiconductor device filter circuit and semiconductor device

2008-05-22

2009-11-17

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S558000

Reexamination Certificate

active

07619465

ABSTRACT:
A filter circuit includes a low-pass filter and a calibration circuit calibrating a frequency characteristic of the low-pass filter. The calibration circuit includes a negative feedback circuit and a control circuit.

REFERENCES:
patent: 7382181 (2008-06-01), Chowdhury et al.
patent: 7474160 (2009-01-01), Erdogan et al.
patent: 2001-274654 (2001-10-01), None
patent: 2002-100962 (2002-04-01), None
patent: 2006-287900 (2006-10-01), None
P. Quinlan et al.; “A Multimode 0.3-200-kb/s Transceiver for the 433/868/915-MHz Bands in 0.25- μm CMOS”, IEEE Journal of Solid-State Circuits, vol. 39, No. 12, p. 2297-2310.

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