AD8309 to Control ADL5530 RF Gain Stage

Question

Good morning- 
 
 I'm planning to use an AD8309 as an IF limiter for an all-analog FM receiver design. While I realize that FM doesn't typically call for any type of AGC, I would like to use the VLOG/RSSI output to control the gain of an ADL5530 in the RF section of the receiver. Given the speed of the AD8309 and the relatively large control loop, can I expect significant stability issues when used in this manner? Are there any Analog/Linear application notes available to help with designing a proper compensation network? 
 
 Thanks in advance, 
 -EHaag

ADIApproved · Accepted Answer

Hello EHaag, 
 Applications Notes AN-1507 and AN-1527 talk more about Automatic Gain Control Loops or Automatic Power Control circuitries. Below are the links: 
 https://www.analog.com/media/en/technical-documentation/application-notes/AN-1507.pdf 
 https://www.analog.com/media/en/technical-documentation/application-notes/AN-1527.pdf 
 Hope these can help.

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AD8309 to Control ADL5530 RF Gain Stage

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