Path: ...!news.roellig-ltd.de!open-news-network.org!weretis.net!feeder8.news.weretis.net!reader5.news.weretis.net!news.solani.org!.POSTED!not-for-mail
From: Jan Panteltje <alien@comet.invalid>
Newsgroups: sci.electronics.design
Subject: Re: Oscillators in LTspice
Date: Sat, 19 Oct 2024 05:38:45 GMT
Message-ID: <vevgl7$k5p6$1@solani.org>
References: <veu2ki$3cmo3$1@dont-email.me> <67128f12$1$2873018$882e4bbb@reader.netnews.com>
MIME-Version: 1.0
Content-Type: text/plain; ISO-8859-15
Content-Transfer-Encoding: 8bit
Injection-Date: Sat, 19 Oct 2024 05:38:47 -0000 (UTC)
Injection-Info: solani.org;
	logging-data="661286"; mail-complaints-to="abuse@news.solani.org"
User-Agent: NewsFleX-1.5.7.5 (Linux-5.15.32-v7l+)
Cancel-Lock: sha1:j3HH8E1f8HrxeqSfPc/NAO7iMTk=
X-User-ID: eJwVxskNwAAIA7CVCBBQx+Eo+49Q1S/TAjHpwXAez8TKN30B5vZjRfelaYgKGu9Y3r+aE9EeL6wpeskc2Q8yLBTx
X-Newsreader-location: NewsFleX-1.5.7.5 (c) 'LIGHTSPEED' off line news reader for the Linux platform
 NewsFleX homepage: http://www.panteltje.nl/panteltje/newsflex/ and ftp download ftp://sunsite.unc.edu/pub/linux/system/news/readers/ 
Bytes: 2178
Lines: 21

On a sunny day (Fri, 18 Oct 2024 12:38:42 -0400) it happened bitrex
<user@example.net> wrote in <67128f12$1$2873018$882e4bbb@reader.netnews.com>:

>On 10/18/2024 12:33 PM, Cursitor Doom wrote:
>> Gentlemen,
>> 
>> I've never spiced an oscillator AFAICR. Do they self-start in spice
>> simulators (LT in particular)? IOW, did Mike Engleheart build something
>> into the engine which generates wideband 'background' noise, particularly
>> at 'power up' as it were? I'm assuming there must be some such mechanism
>> and if there is, it must be present by default for all schematics one
>> attempts to simulate and not just oscillators?
>
>They can be a PITA to start in LTSpice, like this old chestnut really 
>doesn't want to run at all IME in LT but is fine on a breadboard:
>
><https://upload.wikimedia.org/wikipedia/en/thumb/8/83/Forrest_Mims_hand_drawn_circuit_1983.jpg/220px-Forrest_Mims_hand_drawn_circuit_1983.jpg>

Nice, I would perhaps use a UJT for short flashes.
Still have some..