SV: [sdiy] Re: (sdiy) English lessons

[harrybissell]

Magnus Danielson wrote:

> OK, now to get you back on track... remember my sawtooth phase-shifter? What do
> you guys think needs to be done to make it workable? Should a good op-amp be
> enought maybe?
>

Hi Magnus

I never got your sawtooth phase shifter to work in simulation. I tried a lot
of different things (trying to guess where you went wrong).

I'd say for it to work well, you would need a nice, precise square wave with
really good speed.  I'd consider triggering a 4000 series CMOS gate with
a precise power supply voltage.

I have done a couple of sawtooth plase shifters.  You can trim the resistor values
to get them to work, but change the opamp or the PS voltage and you have to do it
again.

H^) harry