Time-dividing method and circuit, and television white balance c

Details Time-dividing method and circuit, and television white balance c Time-dividing method and circuit, and television white balance c

1991-09-16

1994-03-08

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Color balance or temperature

307603, H04N 973, H03K 522

Patent

active

052932230

ABSTRACT:
A time-dividing circuit including a first capacitor, a second capacitor, a current source for charging the first capacitor, circuitry for distributing the charge of the first capacitor to the second capacitor in a predetermined ratio, a compare for comparing the voltages on the first and second capacitors and producing a comparison output signal, circuitry for discharging the charges on the first and second capacitors, and a control circuit for producing control signals for controlling the time-dividing circuit. The time-dividing circuit can be utilized in an automatic white balance control circuit for a color television receiver.

REFERENCES:
patent: 3497817 (1970-02-01), Ellis
patent: 4277697 (1981-07-01), Hall et al.
patent: 4340904 (1982-07-01), Wingrove, Jr.
patent: 4520283 (1985-05-01), Sasaki et al.
patent: 4748497 (1988-05-01), Sengoku
patent: 4930004 (1990-05-01), Yamamoto et al.
patent: 5015892 (1991-05-01), Parsi et al.
patent: 5036387 (1991-07-01), Umezawa

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