Automatic 3-mode switching circuit of a color television set

Details Automatic 3-mode switching circuit of a color television set Automatic 3-mode switching circuit of a color television set

1990-07-31

1992-06-02

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 11, H04N 546

Patent

active

051191776

ABSTRACT:
An automatic 3-mode switching circuit of a color television set for automatically changing into a suitable system according to broadcasting signals of the broadcasting systems, i.e., PAL-N, NTSC, PAL-M systems, which comprises a color killing section, a color existence
on-existence discriminating section, a vertical synchronization signal processing section, a 50/60 Hz discriminating section, a control section, a switching section, a NTSC color demodulating section and a NTSC oscillation section, a PAL-M color demodulating section, a PAL-N color demodulating section and a PAL-N oscillation section, and a voltage controlling section.

REFERENCES:
patent: 4414563 (1983-11-01), Juhnke et al.
patent: 4688082 (1987-08-01), Kato
patent: 4933749 (1990-06-01), Van Lammeren et al.

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