tabascorez
New Member
Dear all
I have to design an amplifier with the following conditions. Since I am new in this, I need some help. Can you guide me on how to start on this?
Supply voltage = ±0.9V (Fixed)
Load condition = 10pF (Fixed)
Low-frequency gain ≥ 80dB
Unity-gain frequency ≥ 5MHz
Power consumption < 500uW
Phase at unity-gain frequency ≥ 60°
Output swing: −0.4V < Vo < 0.4V
Slew rate ≥ 5V/μs
CMRR ≥ 80dB
The circuit should not have an ideal current bias.
I basically know that it should be a 2 stage amplifier, and that feedback should be implemented as the phase at UGF is above 60 degrees.
From these specs, how to choose which circuit configuration (differential pair, cascade) and how to size of transistors (.18micron technology)
I have to design an amplifier with the following conditions. Since I am new in this, I need some help. Can you guide me on how to start on this?
Supply voltage = ±0.9V (Fixed)
Load condition = 10pF (Fixed)
Low-frequency gain ≥ 80dB
Unity-gain frequency ≥ 5MHz
Power consumption < 500uW
Phase at unity-gain frequency ≥ 60°
Output swing: −0.4V < Vo < 0.4V
Slew rate ≥ 5V/μs
CMRR ≥ 80dB
The circuit should not have an ideal current bias.
I basically know that it should be a 2 stage amplifier, and that feedback should be implemented as the phase at UGF is above 60 degrees.
From these specs, how to choose which circuit configuration (differential pair, cascade) and how to size of transistors (.18micron technology)