【TGF4042 signal generator】+6th issue pwm modulation

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【TGF4042 signal generator】+6th issue pwm modulation [Copy link]

This evaluation uses the PWM modulation function of TGF4042 to modulate the signal and then pass it through a simple analog filter. Use an oscilloscope to view the modulated waveform and the waveform after filtering by the analog filter.

Enter the PWM function interface according to the operation instructions in the manual .

Set the PWM frequency to 400kHz and the frequency of the waveform to be modulated to 100Hz .

Set up a simple RC filter circuit, cutoff frequency = 1/2pi*rc = 1592.4hz .

Set the waveform to sine wave

Set the waveform to square wave

Set the waveform to a ramp wave

Set the waveform to triangle wave

Set the waveform to sinc

Set as ECG waveform

At this point, the filtering of the PWM modulated signal is completed and the modulated signal is restored.