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.

Register Log in

Differences between in-band and out-of-band gain compression

Status
Not open for further replies.
M

milvapp

Member level 5
Member level 5
Joined
Apr 17, 2010
Messages
88
Helped
3
Reputation
6
Reaction score
2
Trophy points
1,288
Location
chania greece
Activity points
1,882
Hello,

I would like to know the main-substantial differences between in-band and out-of-band
1dB compression point.(Apart from the obvious difference of the working frequency,
I would like to know the effects of it-what saturates first and so on)

If there is any known material you can provide please let me know.

Thanks.
 

The in-band gain compression is a measure of device linearity, and cannot be improved but by setting a higher device current. The gain compression due to an out-of-band signal is the result of interference, and it can be improved by filtering. A suitable filter should reject the out-of-band interfering signals so they would not affect the desired signal.
 
Hi jiripolivka.thank you for your reply.

So if I understood correctly,in-band compression is a measurement that is not affected by the interferer,while the out-of-band is?
Regarding the in-band compression,by increasing the current consumption this increases the voltage drop at the load resistors
so inj that way linearity gets better?Can you clarify that a bit more?

Thank you in advance.
 

milvapp said:
Hi jiripolivka.thank you for your reply.

So if I understood correctly,in-band compression is a measurement that is not affected by the interferer,while the out-of-band is?
Regarding the in-band compression,by increasing the current consumption this increases the voltage drop at the load resistors
so inj that way linearity gets better?Can you clarify that a bit more?

Thank you in advance.
Click to expand...

The in-band compression is the device specification. The out-of-band compression is system-related as I explained.
In typical amplifiers and MMICs, linearity is proportional to device current. Resistors are needed to establish its operation point.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top