PWM generation circuit, processing circuit and chip
AssigneeAmicro Semiconductor Co., Ltd.
InventorsZhanghui Li, Zaisheng He, Dengke Xu
Life of this patent
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Abstract
Disclosed are a Pulse Width Modulation (PWM) generation circuit, a processing circuit and a chip. The PWM generation circuit is used for controlling a rotation speed of an external motor system. The PWM generation circuit includes a second clock prescaler and a PWM signal generator. A frequency division output end of the second clock prescaler is connected to a data input end of the PWM signal generator. The PWM signal generator includes an output frequency divider and a comparator. A clock output end of the output frequency divider is connected to a comparison input end of the comparator. By means of the technical solution, PWM signals with different duty ratios.
Claims18
A Pulse Width Modulation (PWM) generation circuit, used for controlling a rotation speed of an external motor system, wherein the PWM generation circuit comprises a second clock prescaler and a PWM signal generator;
- a frequency division output end of the second clock prescaler is connected to a data input end of the PWM signal generator;
- the PWM signal generator comprises an output frequency divider and a comparator;
- a comparison input end of the comparator is connected to a clock output end of the output frequency divider, and the other comparison input end of the comparator is connected to a reference constant voltage source;
- an input end of the output frequency divider serves as the data input end of the PWM signal generator, and a signal output end of the comparator serves as a comparison result output end of the PWM generation circuit.
Dependencies are inferred from the claim text.