A circuit for extracting duty ratio information of digital pulse signal
A digital pulse and duty cycle technology, applied in the field of signal processing, can solve the problems of low accuracy, poor real-time performance, and long development cycle, etc., and achieve the effects of good real-time performance, guaranteed output voltage range, and low cost
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[0024] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0025] The invention mainly includes an overvoltage protection circuit, an integral conversion circuit, a low-pass filter circuit, a voltage follower circuit and a voltage selection circuit.
[0026] The overvoltage protection circuit is composed of zener diodes connected to each other, which is used to limit the influence of excessive voltage on the subsequent circuit.
[0027] The integral transformation circuit is connected with the overvoltage protection circuit, and is used for integral transformation of the overvoltage protected pulse signal into a DC voltage signal with a certain amplitude.
[0028] The low-pass filter circuit performs low-pass filter on the changed voltage signal, filters out the high-frequency interference signal in the signal, and retains the useful signal.
[0029] The voltage follower circuit makes the voltage signal increase the...
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