Input/output overvoltage containment circuit for improved latchu

Details Input/output overvoltage containment circuit for improved latchu Input/output overvoltage containment circuit for improved latchu

1997-03-03

1999-07-13

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327319, 327327, 327328, 361 91, H02H 320, H02H 900

Patent

active

059232021

ABSTRACT:
An I/O current containment circuit capable of protecting a semiconductor device from input current that may cause latchup includes a MOS drive circuit and a parasitic sensing circuit having multiple terminals. When the parasitic sensing circuit senses that a voltage level at an input/output transcends a particular voltage potential, the terminal generates a control signal which activates the drive circuit. The drive circuit then absorbs substantially all of the output current that could otherwise flow into the substrate of the semiconductor device.

REFERENCES:
patent: 5361185 (1994-11-01), Yu
patent: 5414583 (1995-05-01), Jordan
patent: 5473169 (1995-12-01), Ker et al.
Ming-Dou Ker, et al., "Transient Analysis of Submicron COMS Latchup With a Physical Criterion", Solid-State Electronics, vol. 37, No. 2, pp. 255-273, 1994.

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