[sdiy] Powering ICs from a Voltage Divider

[Jerry Gray-Eskue]

Um no, the output acts the same either way, using the inverting amp is just
their style. It fits in better with the surrounding text and keep the reader
thinking about the feed back loop gain etc.



-----Original Message-----
From: David G. Dixon [mailto:dixon at interchange.ubc.ca]
Sent: Thursday, October 15, 2009 2:03 PM
To: 'Jerry Gray-Eskue'; Synth-diy at dropmix.xs4all.nl
Subject: RE: [sdiy] Powering ICs from a Voltage Divider


> The old standby, Op Amps and Linear Integrated Circuits -
> Coughlin/Driscoll,

Yes, great book; I use it all the time.

> in chapter 14-6 covers some Op Amp regulators including current boost
> transistors. It is interesting to note that they tend to use Inverting Op
> Amps instead of a voltage divider / Voltage Follower combination.

Could this be because the inverting opamp passes on dc current, while the
follower provides no outlet for dc current?  Gurus, where art thou?