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.
Patent No.:
Date of Patent:
May. 24, 1994
Filed:
Nov. 02, 1992
Applicant:
Inventor:
Woung-Moo Lee, Seoul, KR;
Assignee:
Samsung Electronics Co., Ltd., Kyungku, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307574 ; 307575 ; 3072962 ; 307264 ; 307578 ;
Abstract
A high voltage switching circuit includes a buffer circuit for buffering an input signal, a high voltage pumping circuit for producing a desired voltage in response to an output signal of the buffer circuit, and a disconnecting circuit for disconnecting the buffer circuit and high voltage pumping circuit when the output voltage of the buffer circuit is the source voltage and that of the high voltage pumping circuit is a high voltage, wherein the disconnecting circuit includes an enhancement transistor and depletion transistor connected in series, gates of the transistors being commonly connected to the source voltage.