Patent ID: 6175226
Filing Date: 2001-01-16
Classification: H03F

Abstract:
A differential amplifier circuit to regulate an output reference voltage, the differential amplifier circuit comprisingtwo input transistors, each with a first terminal, a second terminal and a control terminal, and each having its first terminal connected to the first terminal of the other and, through a first current generator, to a first power supply terminal;two load transistors, each with a first terminal, a second terminal and a control terminal, and each having its control terminal connected to the control terminal of the other and, through a second current generator, to a second power supply terminal, and each of the load transistors having its first terminal connected to the second power supply terminal and its second terminal connected to the second terminal of one of the two input transistors;two input terminals, each connected to a corresponding control terminal of the two input transistors;two output terminals, each connected to a corresponding second terminal of one of the two input transistors;a resistive divider connected between the second terminals of the two input transistors;a unidirectionally conducting component connected between an intermediate connection of the resistive divider and the control terminals of the two load transistors; anda current mirror having a first branch connected to a constant reference voltage generator and a second branch comprising the second current generator.