Patent ID: 8222877

Claim:
A voltage regulator, comprising: an input terminal; an output terminal at which an output voltage is provided; an output transistor which couples the input terminal of the voltage regulator to the output terminal of the voltage regulator; and a transimpedance amplifier including an input terminal which is coupled to the output terminal of the voltage regulator and an output terminal which is coupled to a control terminal of the output transistor via a coupling, the coupling having an impedance value between the output terminal of the transimpedance amplifier and the control terminal of the output transistor which at a given frequency is smaller than or equal to an impedance value of an output impedance of the transimpedance amplifier, wherein the transimpedance amplifier comprises an amplifier including an input terminal which is coupled to the input terminal of the transimpedance amplifier, and an output terminal which is coupled to the output terminal of the transimpedance amplifier, and wherein the transimpedance amplifier further comprises a first impedance which couples the output terminal of the transimpedance amplifier to the input terminal of the transimpedance amplifier and which comprises a first resistor with a first terminal which is connected to a first terminal of the first impedance, a second resistor with a first terminal which is connected to a second terminal of the first resistor and a second terminal which is connected to the second terminal of the first impedance and a first capacitor which couples the second terminal of the first resistor to the input terminal of the voltage regulator.