Post subject: AM Power Amplifier Posted: Tue Sep 22, 2009
Joined: Tue Aug 26, 2008 5:18
I need some help
about designig power amplifier for 150kHz-1650kHz appliaction.
Gain requirement is better than 40dB with P1dB above 43dBm. Supply
It is going to be two stage single ended design.
I was thinking about using MW6004N as a driver. I am not sure if
MRF281 can be used for this application as well.
Any info about
the available devices along with some literature for matching networks
will be appreciated.
Post subject: Re: AM Power AmplifierPosted: Sat Sep 26, 2009
Joined: Tue May 20, 2008 8:13 pm
Looks like the MRF281 is going to be out of production
soon, so I wouldn't recommend designing it into a new product. It's
advertised for applications with frequencies from 1 to 2.5 GHz,
way far away from the AM band. Its s-params only go down to 100
I can't find any data on an MW6004N. Who makes it?
Post subject: Re: AM Power AmplifierPosted:
Mon Sep 28, 2009 9:34 am
Aug 26, 2008 5:18 am
for your response. Yes, you're right not to use MRF281. The other
device was MW6S004NT1
Any idea about power device which can deliver
10-20w at 1MHz and 24-28V?
Post subject: Re: AM Power AmplifierPosted: Tue Sep 29, 2009
Joined: Mon Jun 27, 2005 2:02
You may try Polyfet www.polyfet.com
They have line of RF Power Transistors for low frequencies also
suitable for AM.
Re: AM Power AmplifierPosted: Wed Sep 30, 2009 3:48 am
Joined: Tue Aug 26, 2008 5:18 am
Thanks for your reply. Polyfet has got some devices
and I have seen some more at semelab as well.