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From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: 1kHz 130dB distortion sinewave oscillator.
Date: Sun, 2 Feb 2025 17:08:22 +1100
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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