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From: rustyh@wam.umd.edu (Rusty Haddock)
Newsgroups: sci.electronics
Subject: Re: Need to boost output of op-amp (programmable power supply)
Message-ID: <1990Nov19.150845.2443@wam.umd.edu>
Date: 19 Nov 90 15:08:45 GMT
References: <2316@bnlux0.bnl.gov> <4450001@hpcc01.HP.COM>
Sender: usenet@wam.umd.edu (USENET Posting)
Reply-To: michael@mimsy.umd.edu!arinc!vk2bea!michael
Organization: Broadcast Sports Technology
Lines: 18

In article <4450001@hpcc01.HP.COM> brooksp@hpcc01.HP.COM (Peter Brooks) writes:
>A few vendors (National, Linear Technology) have three terminal
>power regulators that have relatively low (third terminal)
>currents.
.........
> The national part (a 1 amp version,
>anyway) is the LM 317.
>
>Pete Brooks  pb@hpocia.hp.com

The problem here is that these parts will source current but will not
regulate when you try and sink current int them (it wont look like a
low impedance voltage source). Probably a better idea is a Silicon
General SG 3172P 3 amp power op-amp or the power op-amps from Apex.

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Michael Katzmann	Broadcast Sports Technology
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