Patent ID: 7215198
Filing Date: 2007-05-08
Classification: H03F

Abstract:
1. A differential current amplifier circuit adapted for producing a differential voltage output between two outputs from the difference between a first and a second input current, the circuit comprising: a first low input impedance circuit arranged to receive the first input current, the first low input impedance circuit providing a first output current, a second low input impedance circuit arranged to receive the second input current, the second low input impedance circuit providing a second output current, a first current subtraction circuit arranged to receive both the first and the second output currents and forming a first output voltage in response to a first difference between the first and the second output currents, a second current subtraction circuit arranged to receive both the first and the second output currents and forming a second output voltage in response to a second difference between the second and the first output currents, a first signal buffer arranged to receive the first output voltage and output a first buffered output voltage, and a second signal buffer arranged to receive the second output voltage and output a second buffered output voltage.