The device is known as an "MMIC" or Monolithic Microwave Integrated Circuit. It is essentially two transistors and the associated biasing resisters that from medium to high gain with decent noise figure over a very wide frequency range from low 10s of MHz up to 10Ghz in some cases.
They are made and biased in a such way that they present roughly 50 ohms as input and output impedances. Sometimes they are referred to as "gain blocks" with the implication that with little more than input and output coupling capacitors and a single bias resistor for the output side you have a gain block that can be embedded in a 50 ohm system. The truth is you need a little more than just those 3 components, but nor much. Cheers, -rick, K7LOG -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, November 26, 2004 9:19 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Re: N-GEN noise generator question Thanks, guys. Now I can get back to it. BTW, what type of device is the MAR-1? 73, Bob, WO3E . . . . _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
