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Low Noise Variable Gain AD600 Amplifier

Question asked by Satyabrata@ece on Dec 6, 2012
Latest reply on Jan 3, 2013 by Satyabrata@ece

Hello,

 

I, Satyabrata Sarangi, am using AD 600 in a cascading mode to get 80 dB gain. The problem i am facing is always i am getting an amplified output, with a larger bandwidth. If the original signal is of 1 MHz, i am getting a 25-30 MHz signal as output. Why this is happening? Please help me.

 

I am implementing Fig. 37 (I am giving 1V directly at VG' instead of controlling VG' through the AD590, 2N3904 and 806ohm resistor) of the attached datasheet.

 

I have attached the datasheet i am following.

 

Please help me.

 

Regards,

Satyabrata

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