For RF amplifiers, suggestions are AMT (American Microwave
Technology), AR (Amplifier Research, http://www.ar-amps.com/), and
ENI (http://www.enipower.com/). I also found that the BPT also sells
CPC amplifier (Broadband Power Technology, http://www.bptec.com/).
For PIN diode switch, see the 36th ENC abstract book page 360
(Thanks Alan and Scoot!).
For gradient drivers, here are the suggestions:
>How about "Highland technology"'s product, all Varian machine's PFG
amplifiers are from there.
>A very good 10 amp gradient power amplifier can be made from the
Burr
Brown power operational amplifiers. They are a standard TO-3 type
package with an integrated op amp with a Darlington pair transistor
set
on the same substrate They are rated at 10 amps continuous at 110
volts
with a maximum frequency of about 1 MHz. These units can also be
paralleled and run with an OP-27 feedback opamp to create a very
inexpensive linear gradient power amplifier with much higher current.
They also can be used as a pin diode driver. For power supply
stability
use a bank of automotive batteries that are trickled charged. An
alternative is to use just batteries and a power MOSFET unit to
create a
gradient amplifier.
Yan
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Yan Xu
W-1358 Biomedical Science Tower
University of Pittsburgh
Pittsburgh, PA 15261
Tel: (412) 648-9922
Fax (412) 648-9587
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