An electronic switch circuit switches out bad decoupling capacitors on a high speed integrated circuit chip. The circuit comprises a control device that operates in the subthreshold or off device state to detect leakage in a decoupling capacitor. This control device operates in a low impedance state if the capacitor is good and in a high impedance sate if the capacitor is bad. A feedback circuit is connected from an internal node of the capacitor to a gate of the control device so that once a state of the capacitor is detected it can be stored on the gate of the control device. A single external signal source shared by a group of capacitors activates the control device to detect leakage in the capacitor. The circuit operates to switch out capacitors that fail during normal operation.
申请公布号
US5506457(A)
申请公布日期
1996.04.09
申请号
US19950418971
申请日期
1995.04.07
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
KRAUTER, BYRON L.;KLIM, PETER J.;NING, TAK H.;SCHUSTER, STANLEY E.;WALLS, LLOYD A.