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US 8,283,972 B1Granted
Substrate bias feedback scheme to reduce chip leakage power
AssigneeCypress Semiconductor Corporation
InventorsVijay Kumar Srinivasa Raghavan, Iulian Gradinariu
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Abstract
A method of biasing a circuit includes generating a control bias signal based on a difference between a leakage current of a baseline circuit and a reference signal; applying the control bias signal to a charge pump circuit to set a value of a reverse body bias voltage output from the charge pump, the control bias signal providing analog control of a digital clock of the charge pump circuit; and applying the reverse body bias voltage to a body of the baseline circuit.
Claims21
A method, comprising:
- generating a control bias signal based on a difference between a leakage current of a baseline circuit and a reference signal;
- applying the control bias signal to a charge pump circuit to set a value of a reverse body bias voltage output from the charge pump, the control bias signal providing analog control of a digital clock of the charge pump circuit;
- and
- applying the reverse body bias voltage to a body of the baseline circuit.
1 more element
An apparatus, comprising:
- a baseline circuit;
- an amplifier circuit coupled with the baseline circuit, wherein the amplifier circuit is configured to generate a control bias signal based on a difference between a leakage current of the baseline circuit and a reference signal;
- a charge pump circuit coupled with the baseline circuit, wherein the charge pump circuit is configured to output a reverse body bias voltage applied to a body of the baseline circuit by applying the control bias signal as an analog control of a digital clock of the charge pump circuit.
An apparatus, comprising:
- a baseline circuit;
- an amplifier circuit coupled with the baseline circuit, wherein the amplifier circuit is configured to generate a control bias signal based on a difference between a leakage current of the baseline circuit and a reference signal;
- a charge pump circuit coupled with the baseline circuit, wherein the charge pump circuit is configured to output a reverse body bias voltage applied to a body of the baseline circuit based on the control bias signal from the amplifier circuit;
- and
- a clamp circuit configured to compare the reverse body bias voltage to the reference signal and based on the comparison to selectively disable the charge pump circuit.
2 more elements
Dependencies are inferred from the claim text.