Patent ID: 6815941
Filing Date: 2004-11-09
Classification: G05F,Y10S

Abstract:
A bandgap reference circuit comprising:a current-voltage mirror circuit having first, second, third, and fourth nodes; a transistor having a gate, and a current path coupled between a source of supply voltage and the first node; a current mirror portion having an input coupled to the first node, a control terminal coupled to the fourth node, and an output; a serially coupled first resistor and first diode coupled between the output of the current mirror portion and ground; a serially coupled second resistor and second diode coupled between the third node and ground; a third diode coupled between the second node and ground; and a differential amplifier having a first input coupled to the fourth node, a second input coupled to the output of the current mirror portion for generating a bandgap reference voltage, and an output coupled to the gate of the transistor.