"John Larkin" wrote in message
...
On Fri, 30 Mar 2007 16:05:14 -0700, "Joel Kolstad"
wrote:

"Fred Bartoli"
r_AndThisToo
wrote in message ...
A small cap (1n or so) across the 1K feedback resistor will be welcomed
too.

Is that meant to surpress any spikes when the '4051 switches (i.e,. if it
"breaks" before it "makes")?

It's kind of a clever circuit, IMO. What do the circuit design gurus
think of
it?

I'm waiting to hear someone suggest you could do this with an 8 pin PIC
or
AVR... 4 lines to the '4051, and another one to receive frequency
commands
over, e.g., RS-232. :-)


Just connect four pic pins to an output node with 1k, 2k, 4k, and 8k
resistors, and you're done.

John


Seems about 30% THD?.



--
Posted via a free Usenet account from http://www.teranews.com