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US 8,575,905 B2Granted
Dual loop voltage regulator with bias voltage capacitor
AssigneeInternational Business Machines Corporation
InventorsJohn Bulzacchelli, Paul D. Muench, Michael A. Sperling, Zeynep Toprak-Deniz
Life of this patent
Estimating the term…
Abstract
A voltage regulator includes a regulator input connected to a reference voltage; a regulator output that outputs a regulated voltage to an electrical load; a first loop, the first loop configured to receive the reference voltage, the first loop outputting a bias voltage; a second loop, the second loop configured to receive the bias voltage as an input; and a bias voltage capacitor connected to a node between the first loop and the second loop.
Claims20
A voltage regulator comprising:
- a regulator input connected to a reference voltage;
- a regulator output that outputs a regulated voltage to an electrical load;
- a first loop, the first loop configured to receive the reference voltage at a first input and the regulated voltage at a second input, the first loop outputting a bias voltage at an output of the first loop;
- a second loop, the second loop configured to receive the bias voltage at a third input;
- a bias voltage capacitor connected to a node located between the output of the first loop and the third input of the second loop;
- and
- a feedback loop comprising a connection between the regulator output and the second input of the first loop that provides the regulated voltage from the regulator output to the second input of the first loop.
4 more elements
A method of voltage regulation, comprising:
- receiving a reference voltage at a first input of a first loop of a voltage regulator and a regulated voltage at a second input of the first loop by the first loop of the voltage regulator,
- outputting a bias voltage by the first loop to a bias voltage capacitor;
- receiving the bias voltage by a second loop of the voltage regulator from the bias voltage capacitor;
- outputting the regulated voltage by a regulator output of the voltage regulator to an electrical load;
- and
- providing, via a feedback loop comprising a connection between the regulator output and the second input of the first loop, the regulated voltage from the regulator output to the second input of the first loop.
3 more elements
Dependencies are inferred from the claim text.