Carrier AGC circuit, especially burst ACC and APC

Details Carrier AGC circuit, especially burst ACC and APC Carrier AGC circuit, especially burst ACC and APC

1978-06-13

1979-10-02

Stellar, George G.

Facsimile and static presentation processing

Static presentation processing

Attribute control

325399, 325408, 325417, 358 27, H04N 946, H04N 9535, H03G 320

Patent

active

041700236

ABSTRACT:
A burst signal level detecting circuit for an automatic color control (ACC) circuit of a television receiver includes a band pass amplifier through which an input chrominance signal is supplied to a first and a second phase comparator via a burst gate. A subtracted output of the first and second phase comparators is supplied to a voltage controlled oscillator (VCO) and, the output of the VCO is supplied to the first phase comparator and through a phase shifter to the second phase comparator. An added output of the first and second phase comparators is supplied to the band pass amplifier as an ACC signal for controlling the gain of the band pass amplifier.

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