Switching Voltage Regulator With Frequency Selection
AssigneeQUALCOMM Incorporated
InventorSai C. Kwok
Life of this patent
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Abstract
Techniques for mitigating interference from a switching voltage regulator by intelligently varying the switcher frequency of the switching voltage regulator are provided. In one aspect, the switcher frequency is set by adjusting a frequency setting input to a programmable clock divider. In a further aspect, a processor drives a programmable clock divider which receives a value representative of a dividing factor by which to divide a reference clock frequency signal to generate a desired switcher frequency for the switching voltage regulator. Values of the programmable clock divider are selectively varied to achieve optimal performance and mitigate the effect of switcher frequency spurious content for a given operating condition or conditions.
Claims27
A device including a switching voltage regulator for generating an output voltage comprising:
- a programmable clock divider, responsive to a reference clock frequency signal and a switcher frequency setting value representative of at least a current operating condition, to generate a switcher frequency;
- and
- a switching voltage regulator controller responsive to the switcher frequency and a reference voltage to regulate the output voltage.
An integrated circuit (IC) for generating an output voltage for a switching voltage regulator comprising:
- a programmable clock divider, responsive to a reference clock frequency signal and a switcher frequency setting value representative of at least a current operating condition, to generate a switcher frequency;
- and
- a switching voltage regulator controller responsive to the switcher frequency and a reference voltage to regulate the output voltage.
A device for generating an output voltage for a switching voltage regulator comprising:
- means, responsive to a reference clock frequency signal and a switcher frequency setting value representative of at least a current operating condition, for generating a switcher frequency;
- and
- means, responsive to the switcher frequency and a reference voltage, for regulating the output voltage.
A method of regulating an output voltage of a switching voltage regulator, comprising:
- identifying a current operating condition;
- generating a switcher frequency setting on the basis of the current operating condition;
- generating, using a programmable clock divider, a switcher frequency using the switcher frequency setting value and a reference frequency clock signal;
- generating switch signals, using a switching voltage regulator controller, on the basis of at least the switcher frequency;
- and
- toggling switches coupled to the output of the switching voltage regulator controller to regulate the output voltage.
A processor configured for operation with a jamming detection circuit and a switching voltage regulator, comprising:
- means for receiving a jammer detect value from the jamming detection circuit;
- and
- means, responsive to the jammer detect value, for generating a switcher frequency setting value associated with an operating switching frequency to the switching voltage regulator.
A computer program product including a computer readable medium having instructions for causing a processor configured for operation with a jamming detection circuit and a switching voltage regulator to:
- receive ajammer detect value from the jamming detection circuit;
- and
- generate, in response to the jammer detect value and the current operating condition, a switcher frequency setting value for use by the switching voltage regulator to regulate an output voltage associated therewith.
Dependencies are inferred from the claim text.