Filter pin integrated circuit socket kit

Details Filter pin integrated circuit socket kit Filter pin integrated circuit socket kit

1990-02-20

1991-04-16

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361111, 361127, 361406, H02H 904

Patent

active

050087703

ABSTRACT:
This is a device for electromagnetic transient protection for integrated circuit boards in a convenient and easily customized package. The device comprises an array of transient protection devices (TPDs) made in the form of sleeves on hollow pins and installed in a fiberglass board. The board has a copper coating to conduct transients away from the pin of the IC. The array of TPDs on the fiberglass board corresponds to the leg spacing of the IC being protected. The device is soldered onto the circuit board and the IC is in turn plugged into it possibly using a friction fit or else it is soldered. An unwanted transient signal enters the device and the IC simultaneously from the circuit board land. The device sees the transient and changes from a high impedance "off" state to its low impedance"on" state and conducts the transient away from the IC. The other pins remain off unless transients are also present at these pins. The TPDs may comprise metal oxide varistors in tubular form, zener diodes or surgectors.

REFERENCES:
patent: 3555374 (1971-01-01), Usuda
patent: 3685002 (1972-08-01), Kennedy
patent: 4198613 (1980-04-01), Whitley
patent: 4409471 (1983-10-01), Aigo
patent: 4559579 (1985-12-01), Val
patent: 4928199 (1990-05-01), Diaz et al.

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