Patent ID: 6347029
Filing Date: 2002-02-12
Classification: G05F,G11C

Abstract:
A current protection circuit for coupling to an output node of an output transistor having an output voltage comprising:a) a first input for coupling to the output node and for receiving the output voltage and generating a control signal; b) an second input for receiving the control signal; and c) an output for coupling to a charge gate node of the output transistor; d) a switch circuit for receiving the control signal and responsive thereto for generating a first output signal and a second output signal; e) a drainage circuit controller, coupled to the switch circuit, for receiving the first output signal and the second output signal and responsive thereto for generating a drainage control signal; f) a gate charge drainage circuit coupled to the drainage circuit controller for receiving the drainage control signal, to the output node for detecting changes in the output voltage, and to the output for selectively affecting the voltage at the output based on the drainage control signal and the voltage at the output node; and g) a voltage pump having a first input for receiving a first predetermined voltage, a first output coupled to the drainage circuit controller for providing a second predetermined voltage, and a second output coupled to the gate charge drainage circuit for providing a third predetermined voltage.