Burst separator and slicer circuit

Details Burst separator and slicer circuit Burst separator and slicer circuit

1996-01-11

1998-09-22

Lee, Michael

Television

Synchronization

Phase locking regenerated subcarrier to color burst

348505, H04N 945, H04N 9455

Patent

active

058122087

ABSTRACT:
A burst separator and slicer circuit separates the burst signal from an input composite video signal. Each period of the input composite video signal includes a horizontal synchronization signal, a burst signal and a video information signal. A burst gate pulse signal representing the presence of the burst signal within the input composite video signal is received by the burst separator and slicer circuit. During the burst period, when the burst gate pulse is active, the burst signal is extracted from the input composite video signal and converted to a square waveform. A differential pair and comparator circuit monitors the input composite video signal and compares it to a constant level reference voltage signal. A constant high voltage level is output when the burst signal is greater than the constant level reference signal. A constant low voltage level is output when the burst signal is less than the constant level reference signal. During non-burst periods a constant DC level voltage signal is output by the burst separator and slicer circuit.

REFERENCES:
patent: 3789141 (1974-01-01), Ayaki et al.
patent: 3918085 (1975-11-01), Numakura et al.
patent: 4007482 (1977-02-01), Amari
patent: 4054903 (1977-10-01), Ninomiya
patent: 4120000 (1978-10-01), Ninomiya
patent: 4550338 (1985-10-01), Kojima
patent: 4706034 (1987-11-01), Kojima

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