Patent ID: 7622942

Claim:
A test circuit comprising: an array of electronic devices under test arranged in rows and columns; a plurality of column driver lines, at least one for each column of said electronic devices under test; a plurality of row output lines, at least one for each row of said electronic devices under test; a plurality of driver/clamps which selectively drive at least one of said column driver lines with a drive voltage while connecting remaining column driver lines to a clamp voltage; a steering circuit which selectively directs a current output for one of said row output lines to a measurement pin at a first side of the array which is opposite a second side of the array while directing current output from remaining row output lines to a sink pin; a first plurality of taps at the first side of the array which sense first voltages of said row output lines; and a second plurality of taps at the second side of the array which sense second voltages of said row output lines.