khatib
Member
I present to you this circuit , that makes PWM using 741 operational amplifiers .
- the first amplifier makes pulses , then the second amplifier makes an integration to the pulses -- to make a triangle wave , and third amplifier work as a comparator , that compare DC with triangle wave , then the out put will be PWM .
- the first amplifier makes pulses , then the second amplifier makes an integration to the pulses -- to make a triangle wave , and third amplifier work as a comparator , that compare DC with triangle wave , then the out put will be PWM .