Mostafa El-Meehi
Newbie level 1
I was requested in my class to design a high-swing Telescopic-cascode fully-differential OTA to work in a voltage buffer (shown below) in an ADC. The expected load is shown below.
There is additional loading of 1 pF at each of the OTA output nodes (not shown).
The amplifier is required to accommodate a maximum swing of 3.4 V differential-peak-to-peak running at 30 MHz and applied to the input of the amplifier (closed loop). OTA’s open- loop gain must equal or exceed 60 dB. The circuit operates from a 2.7 V supply and can use no more than 0.5 mA (including CMFB)
how to start?? and does it mean to desin alone the OTA (open loop) then design a CMFB ? and how to DESIGN such?
Please help as fast as possible!
I'm tooo late and i didn't even start!! so i am very afraid...
Thank you very much
Meehy,
There is additional loading of 1 pF at each of the OTA output nodes (not shown).
The amplifier is required to accommodate a maximum swing of 3.4 V differential-peak-to-peak running at 30 MHz and applied to the input of the amplifier (closed loop). OTA’s open- loop gain must equal or exceed 60 dB. The circuit operates from a 2.7 V supply and can use no more than 0.5 mA (including CMFB)
how to start?? and does it mean to desin alone the OTA (open loop) then design a CMFB ? and how to DESIGN such?
Please help as fast as possible!
I'm tooo late and i didn't even start!! so i am very afraid...
Thank you very much
Meehy,