Input protection for an integrated circuit

Details Input protection for an integrated circuit Input protection for an integrated circuit

1987-03-13

1989-01-31

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 58, 357 2313, 357 59, 330207P, H02H 320

Patent

active

048020540

ABSTRACT:
An integrated circuit has an input protection circuit coupled between an input pad and an input circuit. The input pad receives a signal provided externally from the integrated circuit. The input circuit is responsive to the signal provided externally from the integrated circuit. The input protection circuit provides protection against electrostatic discharge (ESD). The input protection circuit includes two polysilicon resistors in parallel in which one has a greater width than the other. The greater width resistor will be the first to open under ESD stress leaving the other resistor to still provide a signal path between the input pad and the input circuit.

REFERENCES:
patent: 4057844 (1977-11-01), Smedley
patent: 4086642 (1978-04-01), Yoshida et al.
patent: 4358337 (1983-05-01), Asano et al.
patent: 4541002 (1985-09-01), Shimada
patent: 4692834 (1987-09-01), Iwahashi et al.

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