Protective circuit

Details Protective circuit Protective circuit

1998-08-28

2000-12-19

Sherry, Michael J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

361 56, 361 911, 361 915, H02H 322

Patent

active

061634468

ABSTRACT:
A protective circuit is disclosed for protecting an integrated circuit against electrostatic discharge, so-called ESD. The integrated circuit is connected to a supply voltage via a V.sub.cc -pad (2) and an earth pad (3). The protective circuit, which is particularly intended to protect a positively supplied circuit for radio frequency applications against both negative and positive voltage pulses, comprises an input pad (14) and at least one PNP-transistor (20), the input pad being connected to the integrated circuit, and the PNP-transistor being connected with its collector to the input pad, and its emitter to the V.sub.cc -pad or to the earth pad. The base of the PNP-transistor can be connected to its emitter either directly or via a resistor (24), or not be connected.

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Ben Streetman, Solid State Electronic Devices, pp. 228-229, (No month) 1980 .

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