SYSTEM AND METHOD OF CHANGING A PWM POWER SPECTRUM
First Claim
Patent Images
1. A circuit device comprising a pulse edge control circuit to:
- receive at least one pulse-width modulated (PWM) signal from a PWM source;
selectively apply a phase shift operation to the at least one PWM signal at integer submultiples of a frame repetition rate to produce at least one modulated PWM signal having a changed power spectrum; and
provide the at least one modulated PWM signal to at least one output of the pulse edge control circuit.
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Abstract
In a particular embodiment, a circuit device includes a pulse edge control circuit to receive at least one pulse-width modulated (PWM) signal from a PWM source. The pulse edge control circuit is adapted to selectively apply a phase shift operation to the at least one PWM signal at integer submultiples of a frame repetition rate to produce at least one modulated PWM signal having a changed power spectrum. The pulse edge control circuit provides the at least one modulated PWM signal to at least one output of the pulse edge control circuit.
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Citations
26 Claims
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1. A circuit device comprising a pulse edge control circuit to:
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receive at least one pulse-width modulated (PWM) signal from a PWM source; selectively apply a phase shift operation to the at least one PWM signal at integer submultiples of a frame repetition rate to produce at least one modulated PWM signal having a changed power spectrum; and provide the at least one modulated PWM signal to at least one output of the pulse edge control circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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11. A circuit device comprising a pulse edge control circuit to:
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receive PWM signals via at least two inputs; selectively apply a phase shift operation to the received PWM signals at integer submultiples of a frame repetition rate to produce modulated PWM signals having suppressed carriers; and provide the modulated PWM signals to respective outputs of the pulse edge control circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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receiving at least one pulse-width modulated (PWM) signal at a pulse edge control circuit; selectively applying a phase shift operation to the at least one PWM signal at integer submultiples of a frame repetition rate to produce at least one modulated PWM signal having a changed power spectrum; and providing the at least one modulated PWM signal to a corresponding at least one output. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification