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IF Chain question

Question asked by IngJunior on Dec 3, 2010
Latest reply on Dec 6, 2010 by enash

Hi all,

 

i am designing a single ended IF chain like one in the first picture and i have a question regarding the gain.

 

With the VGA i can sweep the gain from -11 to 22 and this is OK.

 

My question is: can i abruptly change the gain of the chain bypassing for example stage 9 (second picture) with an RF-relay or an RF switch? Does the abrupt change lead to stability problem?

 

Thanks in advance for your help

 

Best regards

Oscar

 

 

ifchain.JPG

 

ifchain2.JPG

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