Patent ID: 6194911
Filing Date: 2001-02-27
Classification: G01R

Abstract:
A method of operating a tester module of an integrated circuit tester, the tester module having a circuit node for connection to a signal pin of a device under test and including pin electronics connected to said circuit node and wherein leakage current flows in the pin electronics, said method comprising:(a) connecting the circuit node to a voltage source at a first potential level, whereby the voltage source supplies leakage current to the pin electronics,(b) supplying current to said circuit node from a second potential level,(c) measuring current supplied to said circuit node from said voltage source,(d) selectively varying the second potential level in a manner such as to reduce the current supplied from said voltage source substantially to zero, whereby the leakage current is supplied to the pin electronics from the second potential level, and(e) disconnecting the circuit node from said voltage source.