Horizontal scanning pulse signal control circuit using digital c

Details Horizontal scanning pulse signal control circuit using digital c Horizontal scanning pulse signal control circuit using digital c

1998-09-25

2000-07-11

Ham, Seungsook

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

348521, 348540, H01J 2970, H01N 506, H03L 700, G09G 104

Patent

active

06087788&

ABSTRACT:
In a horizontal scanning pulse control circuit, a reference clock generation circuit generates a reference clock signal in synchronization with a horizontal synchronization signal. First and second horizontal position reference pulse generation circuits generates first and second horizontal position reference pulse signals, respectively, whose phases are different with reference to the horizontal synchronization signal and corresponding to first and second pulses of said reference clock signal. First and second saw-tooth wave generation circuits generate first and second saw-tooth wave signals in response to the first and second horizontal position reference signals, respectively. First and second comparators, compare the first and second saw-tooth wave signals with a horizontal position selection voltage to generate first and second comparison signals, respectively. An RS-type flip-flop is set and reset by the first and second comparison signals, respectively. An output signal of the RS-type flip-flop is used as a horizontal scanning pulse signal.

REFERENCES:
patent: 4352047 (1982-09-01), Imayasu et al.
patent: 6005634 (1999-12-01), Lam et al.

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