Voltage Controlled PWM using OP-Amp

[halee awan]

Hi,

Anyone who has experience with that how to get a PWM signal whose Puls should be controlled based one the I/P voltage ±5V Using simple OP-Amp ?
Thanks in advance

 

[chuckey]

Use Google "NE555 PWM" loads of hits this one is close to waht you want:- https://www.personal.psu.edu/axl17/242l9.pdf Perhaps this one is closer? :- https://4.bp.blogspot.com/_Gky8ltNW...EfcE_ilo/s1600-h/PWM+Generator+Circuit+06.gif
Frank

 

[H.E.Tjelum]

Hi

For some years ago i designed a PWM board with simple components, to demonstrate the basic principle for generating a PWM signal. The board was a part of a complete DC motor controller build from scratch.


The input voltage range is not what you describe, but you can make a few changes to the schematic, to adapt it to your voltage levels.

H.E.Tjelum

 

[halee awan]

thanks to you all
I'd designed this Hardware for some specific task and i used 555 timer
for ±5V supply I used absolute cct using Op-Amp so its Works for me