Patent ID: 6756805
Filing Date: 2004-06-29
Classification: G01R,G11C

Abstract:
A test circuit for testing a functional circuit of an integrated circuit device that is enclosed within a package, said test circuit being enclosed within the package of the integrated circuit device; said test circuit comprising:a test mode enabling circuit for receiving coded signals that are generated externally of the package and for producing enabling signals internally of the package in response to the coded signal; an internal voltage generating circuit for generating an internal voltage internally of the package for said functional circuit, said internal voltage generating circuit maintaining the internal voltage at a setpoint; and a control circuit having an input coupled to said test mode enabling circuit and an output coupled to said internal voltage generating circuit, said control circuit being responsive to different ones of said enabling signals for controlling said internal voltage generating circuit to provide a desired one of a plurality of voltage increments in the magnitude of the internal voltage relative to said setpoint value.