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previous: GFR Is your recom... -- 4/29/1998 6:41 AM View Thread

Re: Ring modulators

4/29/1998 1:33 PM
moocowRe: Ring modulators
The VCO from a 4046 PLL has a nice, symmetric square wave output and the output frequency can be varied by a voltage to pin 9.  
 
If you don't mind using a dual op-amp in your circuit, use the LFO from the MXR Phase 90. You will have to reduce the 15uF cap to get the switching frequency you want.  
 
I've e-mailed the schematic.  
 
You won't have a voltage controlled frequency, but it can be varied by a pot or footpedal. Plus, you can get rid of the 555.

 
Replies:
GFR Thanks for the schematic and tip. <... -- 4/29/1998 1:52 PM