Stable Gated PWM Progress

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dankie is correct.. technically we only need around 0-20 khz by what stan says but it would be nice you go a little further past that just to have it..  thank you for applying your expertise in fixing this problem.. 


outlawstc

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I'm working on a new stable Gated PWM.

We all know that Lawton's gated PWM has major flaws, including;

when one adjusts the frequency, the pulse width ratio also changes, for example you can have a 50% duty cycle, and as one changes the frequency, the duty cycle also changes.

my goal with this new circuit is to keep the duty cycle ratio the same as the frequency is adjusted for both, the main frequency and for the gating frequency. Also the pulse width can be changed and the freq stays the same.

I have done some progress and have the circuit almost done, just need to fine tune some components.

here are some shots:

Great idea. The non synchrone adjusting of the DL circuit was always a problem!

br
Steve

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Well, the 555 chip I'm using can go up to 2.4 Mhz.  so we have plenty of room. now I just have to find out how far I can push the LM311.

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Well, the 555 chip I'm using can go up to 2.4 Mhz.  so we have plenty of room. now I just have to find out how far I can push the LM311.

Jolt I'm worried something will happen to you , plz release a quick draft to Stevie .

Not like this guy ..

http://hydrogencollective.com/

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no need to worry.

and yeah, the circuit I'm working on works just like that.