Another pwm request...

[h-tone]

Hi first time here; definitely not the last....
I'm looking for a PWM circuit that can be controlled by an DC voltage. The 555 based ones don't seem to be well suited for this. I don't know much about other single-chip options. I'm all about analog computing and want my output voltage (0-3 volts, but this can be modified...) to directly control the speed of the motor.
To design a circuit from scratch I imagine an inverter-based oscillator plugged into some sort of inverter based pulse stretcher with voltage control? I don't know...
But ideally done with a pre-existing chip...
Any ideas?

 

[3v0]

Welcome...
It would be so much easier to use a uC.
But I am biased.

 

[h-tone]

nooooooooooooooooooooooooooooooo!!!......must........stay............analog.......twitch...........twitch.........

 

[yngndrw]

This kind of setup suit your requirements ?
http://www.cpemma.co.uk/pwm.html

Triangle wave generator and a comparator.

 

[h-tone]

That looks perfect! Thank you! I knew there was a better way...