Television – Synchronization – Sync separation
Patent
1996-07-29
1998-10-06
Grant, Chris
Television
Synchronization
Sync separation
348530, 348532, H04N 508
Patent
active
058185380
ABSTRACT:
A sync signal separating circuit of an image output apparatus includes an inversion amplifying section for providing a green video signal supplied from a video signal generator to be output as an output signal that is inverted and amplified, and a clipper receiving the output signal of the inversion amplifying section as an input signal to output a clipped output signal obtained by cutting over or below a prescribed amplitude. Here, the inversion amplifying section has an amplifying device, an input resistor and a feedback resistor, and the clipper has a diode having an anode connected to the output side of the inversion amplifying section and a load resistor having one side connected to a cathode of the diode and the other side grounded. Thus, the sync signal is accurately produced from the cathode of the diode without requiring a conventional horizontal sync signal detecting section.
REFERENCES:
patent: 3743774 (1973-07-01), Chipman et al.
patent: 4631588 (1986-12-01), Barnes et al.
patent: 5410363 (1995-04-01), Capen et al.
patent: 5497201 (1996-03-01), Ogawa et al.
Milton S. Kiver, "Television Electronics:Theory and Servicing", Van Nostrand Reinhold Company, p. 70, 579, 1973.
Grant Chris
LG Semicon Co. Ltd.
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