Teradyne, Inc.

Lee Y Song

Alan B Hussey

Edward A Ostertag

An analog/mixed-signal DFT/BIST test module for use in a semiconductor tester to support DFT/BIST testing of semiconductor devices having at least one analog/mixed-signal circuit-under-test is disclosed. The analog/mixed-signal circuit-under-test coupled to an on-chip test circuit having a test signal input and a test signal output. The analog/mixed-signal DFT/BIST test module includes signal source circuitry for generating test signals for application to the test signal input of the analog/mixed-signal circuit-under-test and capture circuitry for acquiring output signals from the test signal output of the analog/mixed-signal circuit-under-test. Processing circuitry responsive to user-programmed algorithms analyzes the output signals from the analog/mixed-signal circuit under test independent of the semiconductor tester host computer.

Automatic test equipment for design-for-test (DFT) and built-in-self-test circuitry

An improved ATE and methods are provided by forming and comparing pattern bursts digitally in gallium arsenide IC's. A desired burst waveform at the DUT terminal is facilitated by setting into timing generators between bursts in effect a plurality of period waveforms constituting a palate from which by successive choice the DUT-terminal driver and comparator waveforms may be built up, each period driver waveform including a predetermined number (including zero) of rising or falling edges, any particular such edge in any particular period driver waveform being provided by the timing generators and each period comparator waveforms including voltage levels to be compared and edges provided through the timing generators, the timing generators being settable only between bursts, selection of desired palette waveforms being provided for each period by a pattern memory.

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Camarillo, CA, United States of America

Lee Y Song