KR970031322A

KR970031322A - Output buffer for static protection

Info

Publication number: KR970031322A
Application number: KR1019950041539A
Authority: KR
Inventors: 박상호
Original assignee: 김광호; 삼성전자 주식회사
Priority date: 1995-11-15
Filing date: 1995-11-15
Publication date: 1997-06-26

Abstract

본 발명은 액정 디스플레이를 구동하는 집적회로에 있어서 과도한 서지전압인 정전기로부터 출력버퍼를 보호하기 위한 정전기 보호를 위한 출력버퍼에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output buffer for electrostatic protection for protecting an output buffer from static electricity that is excessive surge voltage in an integrated circuit driving a liquid crystal display.

제1공급전압(Vdd)을 기준으로 하여 병렬로 연결된 다수의 피모스트랜지스터들(MP1, MP2)로 구성된 제1구동부(110), 한 단자가 제1구동부(110)에 연결되고, 다른 단자는 출력버퍼의 출력인 제1정전기 보호저항수단(120), 제2공급전압(Vss)을 기준으로 하여 병렬로 연결된 다수의 앤모스트랜지스터들(MNl, MN2)로 구성된 제2구동부(140), 한 단자가 출력버퍼(100)의 출력(O)에 연결되고, 다른 단자는 제2구동부(140)에 연결된 제2정전기 보호저항수단(130)으로 구성된다.The first driver 110 comprising a plurality of PMOS transistors MP1 and MP2 connected in parallel based on the first supply voltage Vdd, one terminal is connected to the first driver 110, and the other terminal is connected to the first driver 110. A second driving unit 140 including a plurality of NMOS transistors MN1 and MN2 connected in parallel on the basis of the first electrostatic protection resistance means 120 which is the output of the output buffer, and the second supply voltage Vss. The terminal is connected to the output (O) of the output buffer 100, the other terminal is composed of a second electrostatic protection resistance means 130 connected to the second driving unit (140).

Description

Output buffer for static protection

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명의 정전기 보호를 위한 출력버퍼의 일실시예.2 is an embodiment of an output buffer for electrostatic protection of the present invention.

제3도는 본 발명의 정전기 보호를 위한 출력버퍼의 다른 실시예이다.3 is another embodiment of an output buffer for electrostatic protection of the present invention.

Claims

An output buffer comprising: a first driver comprising a plurality of first type MOS transistors connected in parallel with respect to a first supply voltage; One terminal connected to the first driving unit, and the other terminal comprises: first electrostatic protection resistance means which is an output of the output buffer; A second driver including a plurality of second type morph transistors connected in parallel with respect to the second supply voltage; An output buffer for electrostatic protection, characterized in that one terminal is connected to the output of the output buffer, and the other terminal has a second electrostatic protection resistance means connected to the second driving unit.

The plurality of first type MOS transistors of claim 1, wherein each of the plurality of first type MOS transistors has a drain, a source, and a gate, and a source of each of the first type MOS transistors is connected to the first supply voltage. The gates of the first type MOS transistors of the first buffer is connected to the input signal, the drain of each of the first type MOS transistors are connected to one terminal of the first electrostatic protection resistance means.

3. The output buffer of claim 1 or 2, wherein the plurality of first type morph transistors are PMOS transistors.

The method of claim 1, wherein the plurality of second type MOS transistors of the second driving unit have a drain, a source, and a gate, respectively, and a source of each of the second type MOS transistors is connected to the second supply voltage. A gate of the second type morph transistors of the second type MOS transistors are connected to an input signal, and a drain of each of the second type MOS transistors is connected to another terminal of the second electrostatic protection resistance means.

The output buffer of claim 1 or 4, wherein the plurality of second type morph transistors are NMOS transistors.

The output buffer for static electricity protection according to claim 1, wherein the first and second electrostatic protection resistance means are each connected in parallel.

The output buffer for static electricity protection according to claim 1, further comprising third electrostatic protection resistance means between the first driving part and the first supply voltage.

The output buffer for static electricity protection according to claim 6, wherein each of the third electrostatic protection resistor means has a plurality of resistors connected in parallel.

The output buffer for static electricity protection according to claim 1, further comprising a fourth electrostatic protection resistance means between the second driver and the second supply voltage.

The output buffer for static electricity protection according to claim 6, wherein the fourth electrostatic protection resistor means has a plurality of resistors connected in parallel.

※ Note: The disclosure is based on the initial application.