Circulation:

Since
3/23/99

22670

Hybrid
Voltage Regulators

This
Issue

Use a
Transistor -

Go To Jail (Part 2)

More hybrids. More heresy. Once more we
look into mixing technologies. Voltage regulators, phono preamps,
and single-ended power amplifiers are covered this time.
Additionally, we take a look at a different way of looking at the
RIAA EQ curve. And see how to combine the functions of two circuits
into one in this issue's Design Idea.
Well, it's April,
where is our joke? I guess it will have to be that there is no April
issue. Taxes and writing a new tube-related program have decimated
my available time for writing this journal.
Remember, if
you have a request or suggestion of your own for either an article
topic or circuit, please e-mail:

Editor

The aim here is to combine both technologies,
solid-state and hollow-state, so as to produce a better design than
the use of only one technology would be yield. Tubes are very robust
in the presence of high voltage, while solid-state devices offer
much greater transconductance and lower cost. This gives us our
design strategy: use vacuum tubes where heavy duty high voltage work
is needed and use solid-state devices where precise, low-voltage
circuit housekeeping is needed.

In This
Issue

1
10
12
14

Hybrid Voltage Regulators
RIAA
EQ as Crossover
Design
Idea: (L+R) & (L-R)
E-mail
Publishing
Information
Glossary
of Audio Terms
Glass-Ware.com
Articles
Classic
Magazine articles

The above solid-state high voltage regulator uses a
power MOSFET as the pass device, a zener to deliver the reference
voltage, and an Op-Amp to provide the feedback. The MOSFET's gate
needs to see a greater voltage

www.tubecad.com   Copyright © 2000 GlassWare. All
Rights Reserved

NEXT >