Patent ID: 8975882
Filing Date: 2015-03-10
Classification: G05F

Abstract:
1. A regulating circuit, comprising: a first comparator configured to control a turning on and a turning off of a first transistor based on a first comparison of a reference voltage to a feedback voltage, the first transistor coupled between an output node and a first voltage supply; a second comparator configured to control a turning on and a turning off of a second transistor based on a second comparison of the reference voltage to the feedback voltage, the second transistor coupled to the output node; a high-impedance circuit coupled in series with the second transistor such that the high-impedance circuit is disposed between the second transistor and a second power supply; and a voltage divider coupled between the output node and the second power supply node such that the voltage divider is disposed in parallel with the second transistor; wherein the high-impedance circuit is configured to generate a constant current between the output node and the second voltage supply when the second transistor is turned on, and wherein the high-impedance circuit has an impedance, Z, that satisfies the following condition: wherein,