Teradyne, Inc.
Voltage driver with supply current stabilization

Abstract:

Disclosed herein are voltage driver circuits and methods of operating the same to provide a variable output voltage that is suitable for use in ATE to provide a large number of test signals with accurate voltage levels at high data rates using components that consume relatively low power. According to an aspect, a change in output current in a voltage driver related to changing output voltage may be offset by a stabilization current generated by a correction driver for the voltage driver, such that supply currents drawn from the supply voltages can remain substantially stable. The correction driver may be connected to one or more supply voltages, and programmed to output a stabilization current that offsets changes in supply currents arising from changing of the programmed output of the voltage driver circuit. Such a driver may enable a test system to more precisely test semiconductor devices.