Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2006-03-21
2006-03-21
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S553000, C327S311000
Reexamination Certificate
active
07015747
ABSTRACT:
Provided is a device for controlling a frequency response by scaling an impedance. The device includes a filter and a duty ratio controller. The filter generates an output signal after removing a frequency from an input signal, and comprises a first impedance component and a switch. The switch, which is serially connected to the first impedance component, is switched on or off in response to a duty-controlled clock signal. The duty ratio controller receives a clock signal, controls a duty ratio of the clock signal, and generates the duty-controlled clock signal. The duty ratio controller comprises a flip-flop, which has a clock terminal that receives the clock signal, and a reset terminal, which receives a delayed signal obtained after delaying the clock signal by a time delay. The duty ratio controller further comprises a delay component that receives the clock signal, generates the delayed signal, and controls the time delay in response to a duty control signal.
REFERENCES:
patent: 4114117 (1978-09-01), Ford
patent: 4213467 (1980-07-01), Stulen et al.
patent: 4494551 (1985-01-01), Little, III et al.
patent: 4639795 (1987-01-01), Watanabe et al.
patent: 5345119 (1994-09-01), Khoury
patent: 5408197 (1995-04-01), Miyake
patent: 5463346 (1995-10-01), Brooks
patent: 5473278 (1995-12-01), Shibata
patent: 5563573 (1996-10-01), Ng et al.
patent: 5621315 (1997-04-01), Ikeuchi et al.
patent: 5923028 (1999-07-01), Turnbull et al.
patent: 5942935 (1999-08-01), Okanobu
patent: 6420927 (2002-07-01), Tavares et al.
patent: 6504409 (2003-01-01), Laletin
patent: 6710644 (2004-03-01), Duncan et al.
patent: 6784728 (2004-08-01), Fischer
Callahan Timothy P.
F.Chau & Associates,LLC
Nguyen Hai L.
Samsung Electronics Co,. Ltd.
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