Patent ID: 9553548
Date: 2017-01-24
CPC Classifications: G05F,H03F

Claim:
1. A circuit comprising: a first stage amplifier having a first input coupled to receive a reference voltage, a second input, a first output, and a second output; a second stage amplifier having a first input coupled to the first output of the first stage amplifier, a second input coupled to the second output of the first stage amplifier, and an output; a feed-forward amplifier having a first input coupled to receive the reference voltage, a second input, and an output coupled to the output of the second stage amplifier; a transistor having a control terminal coupled to the output of the second stage amplifier and to the output of the feed-forward amplifier, a first current terminal coupled to an output voltage terminal and a second current terminal coupled to a first voltage supply; a first resistive element having a first terminal coupled to the output voltage terminal and a second terminal coupled to the second input of the first stage amplifier and to the second input of the feed-forward amplifier; and a second resistive element having a first terminal coupled to the second terminal of the first resistive element and a second terminal coupled to a second voltage supply.