Patent ID: 7248025
Filing Date: 2007-07-24
Classification: G05F

Abstract:
1. A voltage regulator comprising: first and second power supply terminals; an output terminal; a reference voltage generating circuit adapted to generate a reference voltage; a drive transistor connected between said first power supply terminal and said output terminal, said drive transistor having a control terminal; a voltage divider connected between said output terminal and said second power supply terminal, said voltage divider adapted to generate a feedback voltage between voltages at said output terminal and said first power supply terminal; a differential amplifier having a first input connected to said voltage divider, a second input connected to said reference voltage generating circuit and an output connected to the control terminal of said drive transistor, said differential amplifier adapted to generate an error voltage in accordance with said feedback voltage and said reference voltage and transmit said error voltage to the control terminal of said drive transistor; an oscillation preventing capacitor connected between the control terminal of said drive transistor and said output terminal; and a capacitor connected between said first power supply terminal and the first input of said differential amplifier.