Triangle wave and sine wave producing circuit

Published:2011/6/20 3:09:00 Author:TaoXi | Keyword: Triangle wave, sine wave, producing circuit | From:SeekIC

The input signal of the triangle wave producing circuit is from the EPWM1A's pin of the DSP, this signal is the PWM signal, it is integrated and changes into the triangle wave, then it is sent into the PWM producing circuit. The PWM signal which comes fron the TMS320F28335 is filtered by the second stage low-pass to produce the sine wave reference signal, this signal inverts with the inverter output voltage feedback signal. The PWM signal which is output by the pin of the EPWM2A is the city electricity input tracking signal, this circuit has the regulation function to the input sine wave signal. The figure shows the triangle wave and sine wave producing circuit.



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