Patent ID: 9640447
Date: 2017-05-02
CPC Classifications: G01R,H01L

Claim:
1. A circuit, comprising: a signal-forcing path coupled to a signal source; a discharging path coupled to a discharging voltage terminal; a contact probe configured to contact a pad module of an under-test device; a monitoring probe configured to generate a monitored voltage associated with the pad module; a switch module; and a control module configured to operate the switch module in one of a discharging mode and an operation mode depending on the monitored voltage, wherein the switch module is operated in the discharging mode to connect the contact probe to the discharging path, in a condition that the monitored voltage does not reach a threshold voltage, and the switch module is operated in the operation mode to connect the contact probe to the signal-forcing path and disconnect the contact probe from the discharging voltage terminal, in a condition that the monitored voltage reaches the threshold voltage such that a signal generated by the signal source is forced to the under-test device.