Oscillator comprising foldover detection
AssigneeWestern Digital Technologies, Inc.
InventorGeorge J. Bennett
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Abstract
Control circuitry is disclosed including an oscillator operable to generate an oscillator signal. A frequency of the oscillator signal increases as an amplitude of a first voltage increases up to a threshold, and the frequency of the oscillator signal decreases as an amplitude of the first voltage exceeds the threshold. The oscillator is operable to generate a foldover signal indicating when the frequency of the oscillator signal is decreasing due to the first voltage exceeding the threshold.
Claims17
Control circuitry comprising an oscillator operable to generate an oscillator signal and a foldover detection circuit, wherein:
- a frequency of the oscillator signal increases as an amplitude of a first voltage increases up to a threshold;
- the frequency of the oscillator signal decreases as an amplitude of the first voltage exceeds the threshold;
- and
- the foldover detection circuit is operable to generate a foldover signal indicating when the frequency of the oscillator signal is decreasing due to the first voltage exceeding the threshold.
A method of generating an oscillator signal, wherein a frequency of the oscillator signal increases as an amplitude of a first voltage increases up to a threshold, and the frequency of the oscillator signal decreases as an amplitude of the first voltage exceeds the threshold, the method comprising generating a foldover signal indicating when the frequency of the oscillator signal decreasing due to the first voltage exceeding the threshold is detected.
Dependencies are inferred from the claim text.