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US 2017/0324324 A1Published application
Voltage regulator with fast feedback
AssigneeInfineon Technologies AG
InventorFabio Ballarin
Life of this patent
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Abstract
In some examples, a voltage regulator comprises an amplifier stage and a pass element configured to receive an output of the amplifier stage and an output of a feedback circuit. The voltage regulator further comprises the feedback circuit configured to receive an output of the pass element, wherein the feedback circuit includes a differentiator stage coupled to a feedback output stage, and wherein the differentiator stage comprises a single capacitor configured to differentiate an output voltage of the pass element.
Claims22
A voltage regulator comprising:
- an amplifier stage;
- a pass element configured to receive an output signal of the amplifier stage and an output signal of a feedback circuit;
- and
- the feedback circuit configured to receive an output signal of the pass element, wherein the feedback circuit includes:
- a differentiator stage comprising a single capacitor configured to differentiate the output signal of the pass element and
- a feedback output stage coupled to the differentiator stage, wherein the feedback output stage includes:
- a first curret mirror configured to reduce a voltage of the output signal of the feedback circuit when a voltage of the output signal of the pass element increases;
- and
- a second current mirror configured to increase the voltage of the output signal of the feedback circuit when the voltage of the output signal of the pass element decreases.
6 more elements
(canceled)
A method comprising:
- receiving, by a feedback circuit of a voltage regulator, an input signal from a pass element of the voltage regulator;
- differentiating, by a single capacitor of the feedback circuit, the input signal into a differentiated signal;
- receiving, at a feedback output stage of the feedback circuit, the differentiated signal;
- reducing, by a first current mirror of a feedback output stage of the feedback circuit, a voltage of the output signal when a voltage of the input signal increases;
- increasing, by a second current mirror of the feedback output stage, the voltage of the output signal when the voltage of the input signal decreases;
- and
- outputting, from the feedback output stage to the pass element, an output signal.
4 more elements
(canceled)
A feedback circuit comprising:
- a single capacitor configured to:
- receive an input signal from a pass element;
- and
- differentiate the input signal into a differentiated signal;
- and
- a feedback output stage configured to receive the differentiated signal, wherein the feedback output stage includes:
- a first current mirror configured to reduce a voltage of an output signal when a voltage of the input signal of the pass element increases;
- and
- a second current mirror configured to increase the voltage of the output signal when the voltage of the input signal of the pass element decreases, wherein the feedback output stage is further configured to output the output signal.
6 more elements
Dependencies are inferred from the claim text.