Doug,
This looks like a device for measuring PDN impedance at high excitations over a
broad frequency range.
We looked into this and I think there are at least two solutions. We did
experiment with the first one.
1) Use a broadband amplifier like from Amplifier research. A 100W amp can
provide about 2A into 50 Ohm. Now the PDN impedance is low, so you can use a
16:1 transformer to increase the current. Such a transformer can be made from
ferrite and coax cable. For the low frequency, below like 1 MHz you can use
many audio amplifiers or you can use a power OP-AMP from APEX.
2) If you place a power Mosfet (RF FET) between Vdd plane and ground another
self created VDD (about 3V higher than your VDD), then you can drive this power
mosfet and switch at any frequency you like. The MOSFET if used in saturation
acts as a voltage controlled current source. This solution should allow you to
inject noise into VDD at rather large current levels. We tested this in
simulation. This method is within your budget, the other is far beyond.
David
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Doug Brooks
Sent: Thursday, April 21, 2016 11:59 AM
To: SI
Subject: [SI-LIST] Re: NEED: High Frequency Power supply
Hi All
I believe I have come up with a solution (all except how to keep the FCC
away!) I'll let you know in about a month.
Doug
Doug Brooks wrote:
Hi all
I am interested in doing some research that would require a power
supply that could do the following:
Input 110 v ac, 60 Hz
Output: constant current up to about 10 A Output frequency: up to
several hundred MHz (preferable frequency adjustable from KHz to MHz)
Does a piece of equipment like this even exist?
If so, I have a very limited budget, say up to about $500. Is that
realistic?
Thanks for any input.
Doug Brooks
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List forum is accessible at:
http://tech.groups.yahoo.com/group/si-list
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
