Sinusoidal phase locked loop IC: Anyone know of one
Sinusoidal phase locked loop IC: Anyone know of one
(OP)
Hi, I can't seem to find any IC phase locked loop that outputs a sinusoid. All the ones I've found have square wave and triangle wave outputs, and a digital phase comparator. I realize I can just do a triangle to sine conversion but there must be an IC out there that does it all.
Thanks.
Thanks.





RE: Sinusoidal phase locked loop IC: Anyone know of one
Benta.
RE: Sinusoidal phase locked loop IC: Anyone know of one
RE: Sinusoidal phase locked loop IC: Anyone know of one
RE: Sinusoidal phase locked loop IC: Anyone know of one
RE: Sinusoidal phase locked loop IC: Anyone know of one
To your problem: my solution would be to multiply your input frequency with a PLL multiplier, perhaps ~1000 times.
Use the counter in the multiplier to drive a ROM containing a sine lookup table. D/A convert, filtering out the high-frequency "fuzz" is easy.
Cheers,
Benta.
RE: Sinusoidal phase locked loop IC: Anyone know of one
This is just a part of my circuit so I don't want the PLL to take up half a breadboard.
RE: Sinusoidal phase locked loop IC: Anyone know of one
The closest to single chip are uP design applications for inverter control from Microchip where the sine is in the software.
RE: Sinusoidal phase locked loop IC: Anyone know of one
Fairly effective down to below 1Hz.
The square wave output is used in a conventional PLL, and the fairly good sine wave output drives the external load.
A two chip solution is probably the best you can hope for.
RE: Sinusoidal phase locked loop IC: Anyone know of one
RE: Sinusoidal phase locked loop IC: Anyone know of one
Another option is the XR2206 to generate the sine output, and use the XR2211 to provide PLL functionality.
They have both been around a long time, but are still currently manufactured.