Patent ID: 8159206
Filing Date: 2012-04-17
Classification: G05F

Abstract:
1. A voltage regulator circuit, comprising: an output node; a supply voltage; a first bipolar transistor (Q a second bipolar transistor (Q a first resistance R a third bipolar transistor (Q a current mirror referenced to said supply voltage, connected between the collectors of said second and third bipolar transistors, and arranged to balance the collector current of one of said second and third bipolar transistors with an image of the collector current of said first bipolar transistor when said output node is at a unique operating point; and a feedback transistor which is connected between said supply voltage and said output node, said voltage regulator circuit arranged such that said feedback transistor provides current to the bases of each of said first, second and third bipolar transistors and to said output node and is driven by the output of said current mirror so as to regulate the voltage at said output node by negative feedback.