Dft Microsystems, Inc.

Mcgill University

Sébastien Laberge

Mohamed M Hafed

Gordon W Roberts

Clarence K L Tam

Bardia Pishdad

Geoffrey D Duerden

Antonio H Chan

A tester for testing high-speed serial transceiver circuitry. The tester includes a jitter generator that uses a rapidly varying phase-selecting signal to select between two or more differently phased clock signals to generate a phase-modulated signal. The phase-selecting signal is designed to contain low- and high-frequency components. The phase-modulated signal is input into a phase filter to filter unwanted high-frequency components. The filtered output of the phase filter is input into a data-transmit serializer to serialize a low-speed parallel word into a high-speed jittered test pattern for input into the transceiver circuitry.

High-speed transceiver tester incorporating jitter injection

A module (') containing an integrated testing system () that includes one or more measurement engines () tightly coupled with a compute engine (). The one or more measurement engines include at least one stimulus instrument () for exciting circuitry of a device-under-test () with one or more stimulus signals, and at least one measurement instrument () that measures the response of the device-under-test to the stimulus signal(s) and generates measurement data. The compute engine includes computation logic circuitry () for determining whether or not the circuitry aboard the device-under-test passes or fails. The integrated testing system further includes a communications engine () providing two-way communications between the integrated testing system automated testing equipment () and/or a dedicated user interface () residing on a host computer ().

System and method for testing integrated circuits

An efficient technique for generating accurate on-chip DC reference voltages is based on filtering a digital pulse modulated sequence in order to extract its average value encoding a DC level, A passive on-chip filter is used for simplicity with an all-digital modulator implementation. Modulation is proposed using pulse-width and preferably pulse-density modulation methods. The latter has the advantage of using a significantly smaller filter which translates into a smaller implementation and faster operational settling times. Many digital pulse modulation generators are proposed.

Programmable DC voltage generator

Growing community of inventors

Montreal, Canada

Sébastien Laberge