Patent ID: 8773826
Filing Date: 2014-07-08
Classification: H01L,H02H

Abstract:
1. A power-rail Electro-Static Discharge (ESD) clamp circuit comprising: a silicon controlled rectifier, connected to a high voltage level V a control module, connected to said silicon controlled rectifier in parallel, said control module connecting between said high voltage level V a PMOS, connected to said high voltage level V an NMOS, connected to said low voltage level V at least one output diode, connected between said PMOS and said NMOS, wherein said trigger node of said P+ triggered silicon controlled rectifier is connecting to said at least one output diode, and said PMOS, said NMOS and said at least one output diode are connecting serially together; a resistor, parallel connected to said P+ triggered silicon controlled rectifier, said PMOS and said NMOS, one end of said resistor connecting to said high voltage level V a conducting string, comprising at least one conducting element connected to said NMOS, wherein said conducting string is connecting between the other end of said resistor, said PMOS, and said low voltage level V