White clip circuit

Details White clip circuit White clip circuit

1995-08-07

1998-03-31

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Gray scale transformation

348707, 348690, H04N 552, H04N 514

Patent

active

057344400

ABSTRACT:
A white clip circuit, formed as an integrated circuit, includes a negative impedance converter which in use is operative to increase the sensitivity of an inverting long-tailed pair of transistors adapted to invert the signals and feed them back to the input in order to control the clip level and to enable it to be effective at a relatively low level.

REFERENCES:
patent: 3557305 (1971-01-01), Dann
patent: 3560645 (1971-02-01), Wallace, Jr.
patent: 3569620 (1971-03-01), Baun
patent: 3947631 (1976-03-01), Rhee et al.
patent: 3965371 (1976-06-01), Sato et al.
patent: 3980815 (1976-09-01), Kaneko
patent: 4056688 (1977-11-01), Stiefel
patent: 5304946 (1994-04-01), Sano
IEEE Transactions on Consumer Electronics, vol. 30, No. 3, Aug. 30, 1984, New York, pp. 312-318, SP002004343, J. Fenk, et al., "VHF/UHF Modulator IC".

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