System and Method of Changing a PWM Power Spectrum
First Claim
Patent Images
1. A circuit comprising:
- at least one input adapted to receive at least one pulse-width modulated (PWM) signal;
at least one output for providing at least one modulated PWM signal; and
a pulse edge control circuit coupled to the at least one input and to the at least one output, the pulse edge control circuit adapted to selectively phase shift the at least one PWM signal to produce the at least one modulated PWM signal having a changed power spectrum.
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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.
82 Citations
26 Claims
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1. A circuit comprising:
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at least one input adapted to receive at least one pulse-width modulated (PWM) signal; at least one output for providing at least one modulated PWM signal; and a pulse edge control circuit coupled to the at least one input and to the at least one output, the pulse edge control circuit adapted to selectively phase shift the at least one PWM signal to produce the at least one modulated PWM signal having a changed power spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a first input terminal adapted to receive a first pulse width modulated (PWM) signal; a second input terminal adapted to receive a second PWM signal; a first output terminal for providing a first modulated PWM signal; a second output terminal for providing a second modulated PWM signal; and a pulse edge control circuit coupled to the first and second input terminals and to the first and second output terminals, the pulse edge control circuit adapted to selectively apply a phase shift operation to the first and second PWM signals to produce the first and second modulated PWM signals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method comprising:
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receiving at least one pulse-width modulated (PWM) signal at a pulse edge control circuit; selectively phase shifting the at least one PWM signal 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 (22, 23, 24, 25, 26)
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Specification