Pulse width modulation circuits, systems and methods
AssigneeCypress Semiconductor Corporation
InventorsKannan Sadasivam, Rajiv Vasanth Badiger
Life of this patent
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Abstract
A pulse width modulation (PWM) system can include at least a first pulse width modulation circuit that generates a first pulse width modulated signal in synchronism with a first clock signal; a source circuit that provides a second pulse width modulated signal that is phase shifted with respect to the first pulse width modulated signal; and output logic that logically combines the first and second pulse width modulated signals to generate a pulse width modulated output signal.
Claims20
A pulse width modulation (PWM) system, comprising:
- at least a PWM circuit that generates a first pulse width modulated signal in synchronism with a first clock signal;
- a source circuit that provides a second pulse width modulated signal that is phase shifted with respect to the first pulse width modulated signal;
- and
- output logic that logically combines the first and second pulse width modulated signals to generate a pulse width modulated output signal.
A method, comprising:
- generating a first pulse width modulated signal having pulse widths synchronous with a first clock signal;
- generating a second pulse width modulated signal that is phase shifted with respect to the first pulse width modulated signal;
- and
- logically combining the first and second pulse width modulated signals to generate an output signal.
A pulse width modulation (PWM) system, comprising:
- a first PWM circuit that varies a pulse width of a first pulse width modulated signal in proportion to a first input clock signal period in response to a first pulse width value;
- and
- output logic that logically combines the first pulse width modulated signal with a second pulse width modulated signal to generate an output signal.
Dependencies are inferred from the claim text.