Signal production circuit

Details Signal production circuit Signal production circuit

1998-10-26

2000-11-28

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327161, 327162, 327263, 348516, 348524, H03L 700

Patent

active

061540722

ABSTRACT:
A signal production circuit for producing a control signal used in a driving and controlling circuit of a display device externally input to the driving and controlling circuit, using an external interface signal. There is a vertical synchronization signal having a predetermined frequency and a reference clock signal in synchronization with the vertical synchronization signal. The signal production circuit includes: a first counter circuit for counting a number of reference clock signal pulses up to a value of a parameter which is preset based on a time interval of one cycle of the vertical synchronization signal and a predetermined target period. Also there is a second counter circuit for counting a number of reference clock signal pulses corresponding to the target period, the counting being performed based on the parameter and a number of reference clock signal pulses for one cycle of the vertical synchronization signal; and a signal output circuit for outputting a signal having a predetermined time period based on the number of reference clock signal pulses corresponding to the target period.

REFERENCES:
patent: 5093750 (1992-03-01), Park

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