Re: 1kHz 130dB distortion sinewave oscillator.

On 2/02/2025 2:12 pm, Edward Rawde wrote:

"JM" <sunaecoNoChoppedPork@gmail.com> wrote in message news:0rgtpjlopt521i824vurfan2jkiljk5ph3@4ax.com...

>
I you're using polyphase sampling you may as well use a svo.  The
LT115 is not a good choice - it's phase margin is close to zero and it
is liable to sing at about 25MHz.
>

 Very interesting circuit. Thank you.
 Is there a suitable available alternative to LT1115?
I have seen LT1115 oscillate at 24 MHz in LTSpice 24.1.1
It doesn't seem to always happen and when it does a little extra load on the output seems to get rid of it.
 2N4391 doesn't seem to be available at a reasonable price but J113 is.

Element 14 says that the J111 is cheap and it has 14000 available globally.
It's fairly close to the 2N4319 in terms of gate cut-off voltage - much closer than the J113.
--
Bill Sloman, Sydney