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US 2003/0080720 A1Published application
Voltage stabilization circuit
AssigneeHewlett-Packard Development Company, L.P.
InventorsAdam L. Ghozeil, Jeffery S. Beck
Life of this patent
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Abstract
A voltage stabilization circuit includes a band gap reference circuit to generate a stable output voltage that is temperature-independent, and a folded cascode feedback circuit to generate a feedback potential that is applied to stabilize the band gap reference circuit. The folded cascode feedback circuit is implemented with current mirror circuits.
Claims28
A voltage stabilization unit, comprising:
- a first circuit configured to a stable output voltage that is temperature-independent;
- and
- a second circuit implemented with current mirror circuits in a folded cascode configuration, the second circuit configured to generate a feedback potential that is applied to the first to stabilize the first circuit.
An electrical circuit, comprising:
- a band gap reference circuit configured to generate a stable output voltage;
- a first current mirror circuit configured to generate current input to the band gap reference circuit;
- a second current mirror circuit coupled to the first current mirror circuit;
- and
- a third current mirror circuit coupled to the second current mirror circuit, wherein the first current mirror circuit, the second current mirror circuit, and the third current mirror circuit are implemented in a folded cascode configuration to form a folded cascode feedback circuit configured to generate a feedback potential that is applied to the band gap reference circuit.
2 more elements
A method, comprising:
- sensing a current differential with a folded cascode feedback circuit;
- generating a feedback potential corresponding to the current differential to stabilize a band gap reference circuit;
- applying the feedback potential to a first transistor of the band gap reference circuit, the feedback potential generating a current through the first transistor;
- and
- applying the feedback potential to a second transistor of the band gap reference circuit, the feedback potential generating a current through the second transistor, wherein the current through the first transistor is equivalent to the current through the second transistor.
2 more elements
Dependencies are inferred from the claim text.