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From: John_A_Pham@cup.portal.com
Newsgroups: sci.electronics
Subject: Re: 2 questions
Message-ID: <31516@cup.portal.com>
Date: 7 Jul 90 21:55:52 GMT
References: <36807@shemp.CS.UCLA.EDU>
Distribution: usa
Organization: The Portal System (TM)
Lines: 17

Mr Mike Loving (loving@lanai.cs.ucla.edu) writes:
|2)  I am working on an EPROM programmer.  One of the requirements is to be
|able to switch someof the lines to various (well, regulated) voltages and
|supply anywhere from 30 to 100 ma.  It seems to me that the best way to do this
|is using an LM317 adjustable regulator, but when one closely reads the specs on
|this beastie, they are so loose as to require a feedback control loop with an
|A/D converter to insure accurate voltages.  Alternatively one could design for
|'nominal' and hope that all works well.  Does anyone out there have any better
|suggestions on how to achieve such a power source?
|
|Mike Loving
 
  In the new Intel Memory data book (1990, ISBN 1-55512-098-9), you can find
6 different Vpp generation circuits (in appendix 316) 
 
G'luck
John