Anton89
Member level 3
Hello everyone,
we need to implement a very high amplification in our RF receiver at same
frequency. We have used a single-conversion superheterodyne receiver,
but at 400 MHz IF frequency we have needed to implement more than 60 dB of gain.
We have just selected a commercial IF amplifier and the idea is to cascade several ones to obtain the required gain.
I've heard that very high amplification at same frequency may lead to have instability problems due
to Barkhausen condition.
We would like to ask you the answers to the following questions:
1) How to understand when the instability occurs?
2) Are there some guidelines to prevent any instability problems?
3) Could you tell us a book which describes this problem extensively?
Many thanks
Best regards,
Antonio L.
we need to implement a very high amplification in our RF receiver at same
frequency. We have used a single-conversion superheterodyne receiver,
but at 400 MHz IF frequency we have needed to implement more than 60 dB of gain.
We have just selected a commercial IF amplifier and the idea is to cascade several ones to obtain the required gain.
I've heard that very high amplification at same frequency may lead to have instability problems due
to Barkhausen condition.
We would like to ask you the answers to the following questions:
1) How to understand when the instability occurs?
2) Are there some guidelines to prevent any instability problems?
3) Could you tell us a book which describes this problem extensively?
Many thanks
Best regards,
Antonio L.