Patent ID: 9477246
Filing Date: 2016-10-25
CPC Classification: G05F

Claim Text:
1. A circuit for providing regulated output voltage, the circuit comprising: a switch comprising a first terminal, a second terminal and a third terminal, the switch configured to receive an input signal at the first terminal and an error signal at the second terminal, and the switch further configured to generate an output signal at the third terminal in response to the input signal and the error signal; a first feedback circuit comprising a first transistor and a second transistor, the first transistor comprising a first node, a second node and third node, and the second transistor comprising a fourth node, a fifth node and a sixth node, the first node and the second node coupled to the third terminal of the switch such that the first node and the second node are positioned to receive the output signal, the fifth node positioned to receive a reference signal and the fourth node coupled to the second terminal such that the first feedback circuit is configured to control the error signal, the third node and the sixth node coupled to each other, and the first transistor and the second transistor configured to control the error signal at the second terminal of the switch in response to a difference between the output signal and the reference signal; and a second feedback circuit configured to sense the error signal and generate a tail current at the second node and the fourth node so as to maintain substantially equal currents in the first transistor and the second transistor, respectively, thereby causing a voltage of the output signal to be substantially equal to a voltage of the reference signal.