SYSTEM AND METHOD OF CHANGING A PWM POWER SPECTRUM
First Claim
1. A circuit device comprising a pulse edge control circuit to receive at least one pulse-width modulated (PWM) signal from a PWM source, the pulse edge control circuit adapted to selectively swap the at least one PWM signal with a logic inverted, duty-cycle complement of the at least one PWM signal at discrete time intervals to produce at least one modulated PWM signal having a changed power spectrum, the pulse edge control circuit to 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 invert and swap the at least one PWM signal with a logic-inverted duty-cycle complement of the at least one PWM signal at discrete time intervals 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
29 Claims
- 1. A circuit device comprising a pulse edge control circuit to receive at least one pulse-width modulated (PWM) signal from a PWM source, the pulse edge control circuit adapted to selectively swap the at least one PWM signal with a logic inverted, duty-cycle complement of the at least one PWM signal at discrete time intervals to produce at least one modulated PWM signal having a changed power spectrum, the pulse edge control circuit to provide the at least one modulated PWM signal to at least one output of the pulse edge control circuit.
- 13. A circuit device comprising a pulse edge control circuit to receive PWM signals via at least two inputs, the pulse edge control circuit adapted to selectively apply a chopping operation to the received PWM signals at discrete time intervals to produce modulated PWM signals having suppressed carriers, the pulse edge control circuit to provide the modulated PWM signals to respective outputs of the pulse edge control circuit, wherein selectively applying the chopping operation comprises selectively inverting and swapping the received PWM signals.
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22. A method comprising:
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receiving at least one pulse-width modulated (PWM) signal at a pulse edge control circuit; selectively swapping the at least one PWM signal with an logic inverted, duty cycle complement of the at least one PWM signal at discrete time intervals 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 (23, 24, 25, 26, 27, 28, 29)
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Specification