Re: Current mirror version of the lowish distortion 1kHz sine wave osillator

On 22/01/2025 7:09 am, john larkin wrote:

On Tue, 21 Jan 2025 14:52:03 -0500, "Edward Rawde"
<invalid@invalid.invalid> wrote:
 

"john larkin" <jl@glen--canyon.com> wrote in message news:uitvojh0a603a326e46go11qqcc1o1sv3p@4ax.com...

On Tue, 21 Jan 2025 11:58:15 -0500, "Edward Rawde"
<invalid@invalid.invalid> wrote:
>

"Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...

On 21/01/2025 2:19 am, Bill Sloman wrote:

On 15/01/2025 11:33 pm, Bill Sloman wrote:

>

...

>

>
That circuit is of the category known as "component rich."

>
What simulation speed do you get?

 That's too repulsive to sumulate.

Not a widely shared opinion.

A super-low distortion oscillator would be interesting, but a few
fundamental issues would need to be addressed first.

Jim Williams published one years ago - it's covered in one of his Linear Technology application notes.

I'd expect that a 1 PPM THD, variable fequency sine generator
shouldn't be too difficult, but how would you measure it?

It isn't. One art per million puts the harmonic content about 120dB below the fundamental, and a few people claim to have done better.
Spectrum analysers and Fourier transform analysis can pull out that level of  harmonic content - as you really ought to know.
--
Bill Sloman, Sydney