Sync signal detection apparatus

Details Sync signal detection apparatus Sync signal detection apparatus

1993-12-10

1995-12-26

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

Having selection between plural continuous waveforms

327387, 327 41, 327 18, H03K 300

Patent

active

054791227

ABSTRACT:
A device detecting a sync signal is provided, which comprises a sync signal detector having an output selector, an internal clock generator and a combination of three current mirror circuits formed of MOS transistors, and two MOS transistors having resistance characteristics. Irrespective of the high and low state of the input clock signal, the selecting signal for selecting the received sync signal, is made to be high, and the discharge time of the capacitor is minimized so that a capacitor having small capacity can be used and the volume of an integrated circuit element can be minimized and the stable operation is performed, irrespective of the frequency band of the sync signal and the duty thereof.

REFERENCES:
patent: 3956685 (1976-05-01), Gordon
patent: 4510612 (1985-04-01), Scholten et al.
patent: 4740687 (1988-04-01), Kiyohara
patent: 4982116 (1991-01-01), Lee
patent: 5227672 (1993-07-01), Sawtell

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