Patent ID: 7023276
Filing Date: 2006-04-04
Classification: H03F

Abstract:
1. A differential amplifier circuit, comprising: a first and second input transistor; a load element; a current source; a terminal for an input voltage, the input voltage terminal connected to a control terminal of the first input transistor; a terminal for a reference voltage, the reference voltage terminal connected to a control terminal of the second input transistor, the input transistors being connected in parallel between the load element and a terminal of the current source; a terminal for an internal reference potential, the internal reference potential terminal connected to a further terminal of the current source; and a regulating circuit having a control voltage source for generating a control voltage, the regulating circuit being connected to the terminal for the reference voltage and to the terminal for the internal reference potential, the regulating circuit regulating the internal reference potential in a manner dependent on fluctuations of the reference voltage such that the internal reference potential is less than the reference voltage by a magnitude of the control voltage.