Patent ID: 6750694
Filing Date: 2004-06-15
Classification: H03K

Abstract:
A clipping circuit, comprising:a current source device, biased to a voltage that is greater in magnitude than the power supply voltage, for sourcing a reference current at an output; a reference transistor, having a conduction path coupled on a first end to the output of the current source device and coupled on a second end to a power supply voltage, the reference transistor also having a control electrode connected to the first end of its conduction path; and a mirror transistor, having a conduction path with a first end for receiving an input signal and a second end for presenting an output signal, and having a control electrode connected to the control electrode of the reference transistor so that, responsive to receiving an input signal at a voltage above the power supply voltage, the mirror transistor presents an output signal at a voltage at or below the power supply voltage.