From: John Woodgate
Subject: Re: Unused op amp inputs
Date: Thu, 19 Dec 2002 20:38:39 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Thu, 19 Dec 2002 21:39:47 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Spehro Pefhany
wrote (in <firstname.lastname@example.org
om>) about 'Unused op amp inputs', on Thu, 19 Dec 2002:
>On Thu, 19 Dec 2002 17:54:13 +0000, the renowned John Woodgate
>>Well, tell him what to do with them, then! Inverting input tied to
>>output, non-inverting input to ground.
>>This works for both bipolar and CMOS devices.
>Yes, it works, but unless you've verified it in fact yields
>lowest power consumption with every type of op-amp on the market ;-)
>I don't think it exactly answers his quesetion.
See my other response to a similar point. What is YOUR answer to his
>Note that "ground" may be outside the CM range for some amplifiers
>and some definitions of ground.
Yes: how complicated can we make the response to the OP? It seems to me
that there is a competition on s.e.d. to pile up the complications until
the OP's head spins and he/she departs in disgust.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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