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PWM generator circuit

This circuit utilizes a triangle wave generator and comparator to generate a 
500 kHz pulse-width modulated (PWM) waveform with a duty cycle that is 
inversely proportional to the input voltage. An op amp and comparator 
generate a triangle waveform which is applied to the inverting input of a 
second comparator. The input voltage is applied to the non-inverting input of 
this second comparator. By comparing the input waveform to the triangle wave, 
a PWM waveform is produced. The second comparator is placed in the feedback 
loop of an error amplifier to improve the accuracy and linearity of the 
output waveform.

View our portfolio of operational amplifiers Learn more about analog signal chain in our online classroom, TI Precision Labs Evaluate and prototype with amplifiers using TI’s DIYAMP-EVM Learn more about the circuit from this video

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