Ring oscillator dynamic adjustments for auto calibration
DCFirst Claim
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1. An integrated circuit, comprising:
- a voltage sensor having a voltage output;
a temperature sensor having a temperature output; and
a memory capable of receiving an input address based upon the voltage output and the temperature output, the memory configured to store compensation data.
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Abstract
An apparatus compensates for voltage and temperature variations on an integrated circuit with: a voltage sensor having a digital voltage output; a temperature sensor having a digital temperature output; a register coupled to the voltage sensor and the temperature sensor, the register adapted to concatenate the digital voltage output and the temperature output into an address output; and a memory device having an address input coupled to the address output of the register, the memory device being adapted to store one or more corrective vectors.
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Citations
19 Claims
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1. An integrated circuit, comprising:
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a voltage sensor having a voltage output; a temperature sensor having a temperature output; and a memory capable of receiving an input address based upon the voltage output and the temperature output, the memory configured to store compensation data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for dynamically adjusting for voltage variations on an integrated circuit, comprising:
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periodically sensing a voltage value and a temperature value of the integrated circuit; accessing a memory of the integrated circuit using an address formed based on a combination of the voltage value and the temperature value, the memory configured to store compensation data comprising a plurality of adjustment values; and dynamically adjusting a frequency of the integrated circuit using one of the adjustment values. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An integrated circuit comprising:
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a voltage sensor configured to sense a voltage of the integrated circuit; a memory coupled to the voltage sensor, the memory configured to store compensation data; an oscillator coupled to the memory to receive correction information therefrom, the oscillator configured to vary an operating parameter of the oscillator using the correction information; and a controller coupled between the memory and the oscillator to receive the correction information and configured to hold an output of the oscillator when a value of the correction information is changed. - View Dependent Claims (17, 18, 19)
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Specification