Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hplabs!hpcc05!hpcc01!brooksp
From: brooksp@hpcc01.HP.COM (Peter Brooks)
Newsgroups: sci.electronics
Subject: Re: Need to boost output of op-amp (programmable power supply)
Message-ID: <4450001@hpcc01.HP.COM>
Date: 16 Nov 90 23:24:43 GMT
References: <2316@bnlux0.bnl.gov>
Organization: HP Corp Computing & Services
Lines: 11

A few vendors (National, Linear Technology) have three terminal
power regulators that have relatively low (third terminal)
currents.  I suppose (just guessing; I don't have any data sheets
before me) that you could use the output of your opamp circuit
(with the output skewed to corrct for the three terminal 
regulator's offset) as the reference voltage for the 3 terminal
regulator.  I'd check the Linear technology data sheets for
devices and applications.  The national part (a 1 amp version,
anyway) is the LM 317.

Pete Brooks  pb@hpocia.hp.com