Output buffer design - suggestions

[whirl7wind77]

Can anyone suggest the type of buffer i should use to connect the output to transmission line with Zo 50 ohms through a bypass capacitor.

 

[crutschow]

What is the maximum signal frequency?

 

[whirl7wind77]

3 dB frequency is around 8 GHz.

[This buffer exists between the output of the amplifier and the load which is a high bypass capacitor followed by a transmission line.]

 

[bigpop]

you can try CML driver with 50ohm resistor loading. the current is dependent by how much signal swing you want to get.
it is strange to me that typical the high pass capacitor is put at the end out transmission line. why in your case it is at the beginning of line?

 

[whirl7wind77]

I forgot to mention that the signal is not digital. Its analog. So I think I cannot use CML driver.

 

[Dominik Przyborowski]

What is your power consumption constraint and output dynamic range relative to your power supply.

 

[whirl7wind77]

The output resistance of amplifier is 3K. This output is to be connected to load 50 ohms followed by a bypass capacitor through BUFFER . This buffer should not decrease Bandwidth and Gain .

[ Supply Voltage is 1.2 V, the output swing is 0.15V and there is no much constraint on power consumption. ]
Please suggest some ideas.