The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Dec. 26, 1995

Filed:

Dec. 10, 1993
Applicant:
Inventor:

Shi-hong Park, Bucheon, KR;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
327 99 ; 327387 ; 327 41 ; 327 18 ;
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.


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