Patent ID: 7808754
Filing Date: 2010-10-05
Classification: H02H

Abstract:
1. A hybrid protection circuit, comprising: a stress detection circuit between a power supply voltage and a ground voltage, the stress detection circuit configured to output a detection signal that is activated when a positive electrostatic discharge (ESD) event or a positive electrical over-stress (EOS) event occurs; a clamp device between the power supply voltage and the ground voltage, the clamp device configured to discharge first charges generated by a negative ESD event or a negative EOS event when the negative ESD event or the negative EOS event occurs and configured to discharge second charges generated by the positive ESD event or the positive EOS event in response to a clamping signal activated when the positive ESD event or the positive EOS event occurs; and an on-time adjustment circuit between the power supply voltage and the ground voltage, the on-time adjustment circuit configured to receive the detection signal, configured to output the clamping signal, and configured to maintain the clamping signal in an active state until the second charges generated by the positive ESD event or the positive EOS event are discharged, wherein