Patent ID: 7626456
Filing Date: 2009-12-01
Classification: H03F

Abstract:
1. An overdrive control system to be coupled between first and second reference voltages and to an amplification stage having a first input, a second input, and an output, the overdrive control system comprising: an input terminal and an output terminal to be coupled respectively to the first and second inputs of the amplification stage; an internal node coupled to said output terminal; a voltage controlled current source having a control terminal and to be coupled between the first reference voltage and said internal, node; an adding block having first and second inputs and an output, said first input of said adding block coupled to said input terminal, said output of said adding block being coupled to said control terminal of said voltage controlled current source; and at least one clamping block to be coupled between said output terminal and the second reference voltage, and coupled to said second input of said adding block; said voltage controlled current source to deliver a compensation current to said output terminal when a voltage signal on said input terminal has a value greater than a voltage signal on said output terminal to thereby force the voltage signal on the output terminal to follow the voltage signal on the input terminal by an amount based upon a clamping voltage provided by said at least one clamping block.