Noise reduction device employing a sample and hold circuit, and

Details Noise reduction device employing a sample and hold circuit, and Noise reduction device employing a sample and hold circuit, and

1995-05-12

1998-12-15

Tran, Thai

Television

Camera, system and detail

Combined image signal generator and general image signal...

348607, 386114, 455296, H04N 521, H04N 5213, H04N 5217

Patent

active

058502572

ABSTRACT:
A noise reduction device employing a sample and hold circuit includes a high-pass filter to which input signals are provided. A sample and hold circuit is provided to which an output from the high-pass filter is provided. A limiter is included for limiting the amplitude of an output from the sample and hold circuit. A differential amplifier receives the input signals and the output from the limiter, and outputs noise-reduced signals.

REFERENCES:
patent: 4283742 (1981-08-01), Izumita et al.
patent: 4667225 (1987-05-01), Kanda
patent: 4751455 (1988-06-01), Ayres
patent: 4910604 (1990-03-01), Takei et al.
patent: 5309183 (1994-05-01), Sasaki et al.
"Video Recording Technology," Nobutoshi Kihara, Electronics Science Series, Sanpo Publication.

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