Systems and methods for providing an auto-calibrated voltage reference
First Claim
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1. A controller configured to:
- determine a presence or an absence of a condition for calibrating a first voltage reference for generating a first voltage for operating a circuit, wherein the condition includes an expiration of a timer indicative of a passage of time from a previous calibration of the first voltage reference, and wherein a time duration associated with the timer depends upon a rate of change of a temperature associated with the circuit;
responsive to the presence of the condition, enable a second voltage reference to generate a second voltage for calibrating and controlling the first voltage wherein the second voltage reference has a higher precision than the first voltage reference; and
responsive to the absence of the condition, disable the second voltage reference.
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Abstract
A system may include a first voltage reference for generating a first voltage for operating a circuit, a second voltage reference having a higher precision than the first voltage reference, and a controller. The controller may be configured to determine a presence or an absence of a condition for calibrating the first voltage reference. The controller may also be configured to, responsive to the presence of the condition, enable the second voltage reference to generate a second voltage for calibrating the first voltage reference. The controller may further be configured to, responsive to the absence of the condition, disable the second voltage reference.
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Citations
13 Claims
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1. A controller configured to:
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determine a presence or an absence of a condition for calibrating a first voltage reference for generating a first voltage for operating a circuit, wherein the condition includes an expiration of a timer indicative of a passage of time from a previous calibration of the first voltage reference, and wherein a time duration associated with the timer depends upon a rate of change of a temperature associated with the circuit; responsive to the presence of the condition, enable a second voltage reference to generate a second voltage for calibrating and controlling the first voltage wherein the second voltage reference has a higher precision than the first voltage reference; and responsive to the absence of the condition, disable the second voltage reference. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising:
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determining a presence or an absence of a condition for calibrating a first voltage reference, the first voltage reference for generating a first voltage for operating a circuit, wherein the condition includes an expiration of a timer indicative of a passage of time from a previous calibration of the first voltage reference, and wherein a time duration associated with the timer depends upon a rate of change of a temperature associated with the circuit; responsive to the presence of the condition, enabling a second voltage reference to generate a second voltage for calibrating and controlling the first voltage, the second voltage reference having higher precision than the first voltage reference; and responsive to the absence of the condition, disabling the second voltage reference. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A system comprising:
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a first voltage reference for generating a first voltage for operating a circuit; a second voltage reference having higher precision than the first voltage reference; and a controller configured to; determine a presence or an absence of a condition for calibrating the first voltage reference, wherein the condition includes an expiration of a timer indicative of a passage of time from a previous calibration of the first voltage reference, and wherein a time duration associated with the timer depends upon a rate of change of a temperature associated with the system; responsive to the presence of the condition, enable the second voltage reference to generate a second voltage for calibrating and controlling the first voltage reference; and responsive to the absence of the condition, disable the second voltage reference.
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Specification