Browse Prior Art Database

Programmable Array Adapter for Transistor Tester

IP.com Disclosure Number: IPCOM000046089D
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Sutcliffe, AJ: AUTHOR [+2]

Abstract

The programmable array adapter is a device which is used as an interface between a linear tester and an array-type module. The sixteen pins of the array are multiplexed into the three terminals of the linear tester. The device is fully programmable and can accommodate any Dual Inline Package (DIP)-type device up to sixteen pins.

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Programmable Array Adapter for Transistor Tester

The programmable array adapter is a device which is used as an interface between a linear tester and an array-type module. The sixteen pins of the array are multiplexed into the three terminals of the linear tester. The device is fully programmable and can accommodate any Dual Inline Package (DIP)-type device up to sixteen pins.

The array under test is placed into a zero insertion force (ZIF) socket which is connected by sixteen sets of relays to emitter (E), base (B) and collector (C) terminals of a linear tester (not shown). The setting of the relays is controlled by a binary-coded decimal (BCD) counter and a 9xl6 switching matrix.

The BCD counter generates a BCD code, 0 through 9, which corresponds to a group of pins on the module which comprise the I/O connections to one member of the array. The count is displayed and is converted, by a BCD-to- decimal decoder, to a decimal signal provided to the 9xl6 switching matrix which is used to program which relays are closed for the selected member of the array under test.

Each relay group is composed of a double-pole relay, a driver for that relay, and two switches. The DPTT switch selects where the contacts of the relay are connected when the relay is activated. A SPST switch (not shown) can be used if it is necessary to have a common relay closed for every channel.

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