Oscillator frequency compensation with a fixed capacitor
AssigneeCypress Semiconductor Corporation
InventorsCarl Liepold, Austin Chan
Life of this patent
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Abstract
A frequency compensation circuit determines a target calibration count of a fixed capacitor coupled to a processing device. The frequency compensation circuit identifies a current calibration count of the fixed capacitor. The frequency compensation circuit determines that the current calibration count satisfies a threshold criterion associated with the target calibration count. In response to determining that the current calibration count satisfies the threshold criterion, the frequency compensation circuit adjusts a frequency of an internal oscillator of the processing device based on the current calibration count and the target calibration count.
Claims20
A method, comprising:
- determining, by a frequency compensation circuit, a target calibration count of a fixed capacitor coupled to a processing device;
- identifying, by the frequency compensation circuit, a current calibration count of the fixed capacitor;
- determining that the current calibration count satisfies a threshold criterion associated with the target calibration count;
- and
- responsive to determining that the current calibration count satisfies the threshold criterion, adjusting a frequency of an internal oscillator of the processing device based on the current calibration count and the target calibration count.
An apparatus, comprising:
- a frequency compensation circuit, operatively coupled to a processing device
- a fixed capacitor, wherein the fixed capacitor is operatively coupled to the processing device;
- and
- an internal oscillator to generate a clock signal, wherein the frequency compensation circuit is to adjust a frequency of the internal oscillator based on a current calibration count and a target calibration count of the fixed capacitor.
A system, comprising:
- a processing device;
- a fixed capacitor, wherein the fixed capacitor is operatively coupled to the processing device;
- an internal oscillator of the processing device to generate a clock signal;
- and
- a frequency compensation circuit, operatively coupled to the processing device, to:
- determine a target calibration count of the fixed capacitor;
- identify a current calibration count of the fixed capacitor;
- determine that the current calibration count satisfies a threshold criterion associated with the target calibration count;
- and
- responsive to determining that the current calibration count satisfies the threshold criterion, adjust a frequency of the internal oscillator based on the current calibration count and the target calibration count.
Dependencies are inferred from the claim text.