Capacitance switching method of eliminating false transients on the Boonton 72B capacitance meter in deep-level transient spectroscopy applications

It is shown that the usual method of disconnecting the capacitance from a Boonton 72B capacitance meter during the fill pulse in a DLTS application produces a false transient that can interfere with a true DLTS transient resulting from the emptying of traps. This false transient is due to the change in capacitance that the bridge sees when the sample is reconnected. It is shown that by switching from the sample with its capacitance Cs during the fill pulse to a dummy capacitance Cd=Cs this false transient can be avoided.