Rajagopal87
New Member
Can anyone help me design a pulse width modulator using discrete components without using an IC. I have found one circuit in the web and I cannot understand how it works.
**broken link removed**
I guess a square wave is produced in the capacitor(am I right?) if its value is low enough. what I cant understand is the square wave is fed into one input of differential pair and the signal ( inc or dec width) is fed into another input, Will it not cause a change in frequency instead of the width in the output terminal?
Please explain in detail.
Thank You.
**broken link removed**
I guess a square wave is produced in the capacitor(am I right?) if its value is low enough. what I cant understand is the square wave is fed into one input of differential pair and the signal ( inc or dec width) is fed into another input, Will it not cause a change in frequency instead of the width in the output terminal?
Please explain in detail.
Thank You.