11 Jun
2010
11 Jun
'10
4:11 a.m.
On 11/06/10 02:23, Brent Hilpert wrote:
Might be more complexity and designing than you wish
for the task, but
JOOI, one way of doing constant-power regulation is with an
analog-multiplier IC.
I've seen this done (on the supply side) in a HV lab power supply,
using an MC1494 4-quadrant multiplier. I can supply the reverse-engineered
schematic if of interest.
That would be nice if it's not too much trouble.
The MC1494 is 70/80's-era chip, I don't know
what's current these days.
I seem to recall the MC1494 being a Gilbert-cell multiplier. The SA602
or SA612 might be one option, but ADI do the AD532 which would probably
be a much better choice. Unfortunately even the cheapest version of that
chip (10-lead TO-100) is about $20 in 100-off.
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/