Noise canceling circuit

Details Noise canceling circuit Noise canceling circuit

2005-12-13

2005-12-13

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Signal transmission integrity or spurious noise override

C327S558000

Reexamination Certificate

active

06975158

ABSTRACT:
A low-pass filter eliminates a high-frequency component contained in an input signal. An inverter outputs a signal at a high level or a low level in response to an output of the low-pass filter that is larger or smaller than a threshold level. A one-shot pulse generating circuit outputs a pulse signal at a point of time when an output level of the inverter is changed. FETs receive the pulse signal output from the one-shot pulse generating circuit, and pulls in forcedly the output of the low-pass filter to the high level or the low level. According to this pulling-in operation, generation of the noise at an output terminal can be prevented.

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Chinese Patent Office, “Office Action,” Apr. 1, 2005.

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