Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Which part of variable gain amplifier can be used ?

Status
Not open for further replies.

fnx7

Junior Member level 2
Joined
Apr 19, 2006
Messages
24
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,443
50~860MHz VGA??

Which part of variable gain amplifier can be used in this field?

spec:

frequency band: 50~860MHz
impedance: 75 Ohm
OIP3: 38dBm
gain maximum:at least 15dB
gain adjust range: 20dB

Thanks
 

50~860MHz VGA??

I don't know any part with exactly that specs.

Maybe a solution could be the use of an attenuator+VGA+PA

For example:
10 dB attenuator
+10 to -10 dB gain (19 dBm OIP3 at max gain)
+20 dB PA (>40 dBm OIP3)

Overall:
max gain=20
OIP3=38 dBm

A starting point could be MAX3538 that has 20 dB control range, max gain 10 dB and output IP3 of about 19 dBm at max gain.

It will be a very power hungry circuit, I suppose.

Feasible?

Mazz
 

Re: 50~860MHz VGA??

Thanks Mazz
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top