Pulse width modulation signal generation circuit and pulse width modulation signal generation method
AssigneeRichtek Technology Corporation
InventorsJo-Yu Wang, Wei-Hsu Chang
Life of this patent
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Abstract
The present invention discloses a PWM signal generation circuit and a PWM signal generation method. The PWM signal generation circuit includes: a reference signal generation circuit for generating a reference signal according to an input voltage; a variable ramp signal generation circuit for generating a variable ramp signal; and a comparator circuit for comparing the reference signal with the variable ramp signal to generate a PWM signal. A rising slope and/or a falling slope of the variable ramp signal is variable.
Claims12
A pulse width modulation (PWM) signal generation circuit, comprising:
- a reference signal generation circuit for generating a reference signal according to an input voltage;
- a variable ramp signal generation circuit for generating a variable ramp signal having a fixed peak level, wherein a rising slope and/or a falling slope of the variable ramp signal is variable;
- and
- a comparator circuit electrically connected to the reference signal generation circuit and the variable ramp signal generation circuit, for comparing the reference signal with the variable ramp signal to generate a PWM signal.
A pulse width modulation (PWM) signal generation method, comprising:
- generating a reference signal according to an input voltage;
- generating a variable ramp signal having a fixed peak level, wherein a rising slope and/or a falling slope of the variable ramp signal is variable;
- and
- comparing the reference signal with the variable ramp signal to generate a PWM signal.
Dependencies are inferred from the claim text.