Input/output protection circuit and semiconductor device having

Details Input/output protection circuit and semiconductor device having Input/output protection circuit and semiconductor device having

1996-07-26

1997-07-22

Ngo, Ngan V.

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

330260, 330298, H01L 2362

Patent

active

056506520

ABSTRACT:
A protection circuit includes a first protection circuit, which is coupled between a signal output terminal of an internal circuit and an external connection terminal and which prevents an abnormal voltage applied to the external connection terminal from being input to the signal output terminal. The protection circuit also includes a second protection circuit, which is coupled between a signal input terminal of the internal circuit and the external connection terminal and which prevents the abnormal voltage applied to the external connection terminal from being input to the signal input terminal. The signal input terminal is operatively coupled to the signal output terminal via the first and second protection circuit and has an impedance higher than that of the signal output terminal.

REFERENCES:
patent: 4066918 (1978-01-01), Heuner et al.
patent: 4440980 (1984-04-01), Bakker
patent: 4733285 (1988-03-01), Ishioka et al.
patent: 4990802 (1991-02-01), Smooha
Avery, "A Review of Electrostatic Discharge Mechanisms and On-Chip Protection Techniques to Ensure Device Reliability," Journal of Electrostatics, Feb. 24, 1990, No. 2, pp. 111-130.
"Deux Amplificateurs de 20 W a Symetrie Quasi-Complementaire," Toute Electronique, Dec. 1970, vol. 37, No. 351, pp. 569-570.

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