dasubergoober
Newbie level 3
hey i have recently been given a semester project where i have to design a telescopic fully differential OTA (see the picture). i have been given the following spesifications:
Specification for the OTA:
Parameter Value
Small signal gain (dVo/dVi) > 40dB
Unity gain frequency (f0) > 600MHz
Input common mode VDD/2 +- 300mV
Output common mode VDD/2 +- 300mV
Input common mode swing +- 100mV
Output swing 1 VPP (differential peak to peak)
VDD 1.5V
Maximum ID 5 mA
Power Minimize
Load at VOUTN & VOUTP < 0.9pF
Minimum VEFF 110mV
Min VS 200 mV
the project consists of the following two tasks.
1. Choose the correct values for the drain current (ID = I1 = I2 = I0/2), M0, M1, M2, M3, input common mode, output common mode, VB such that specification given below is achieved.
2. Design the current source I0 including the bias network for I0, and the voltage VB. (need not design I1 or I2)
i am totally in the dark as to where i am supposed to start:S can someone give me a push in the right direction?!?
Specification for the OTA:
Parameter Value
Small signal gain (dVo/dVi) > 40dB
Unity gain frequency (f0) > 600MHz
Input common mode VDD/2 +- 300mV
Output common mode VDD/2 +- 300mV
Input common mode swing +- 100mV
Output swing 1 VPP (differential peak to peak)
VDD 1.5V
Maximum ID 5 mA
Power Minimize
Load at VOUTN & VOUTP < 0.9pF
Minimum VEFF 110mV
Min VS 200 mV
the project consists of the following two tasks.
1. Choose the correct values for the drain current (ID = I1 = I2 = I0/2), M0, M1, M2, M3, input common mode, output common mode, VB such that specification given below is achieved.
2. Design the current source I0 including the bias network for I0, and the voltage VB. (need not design I1 or I2)
i am totally in the dark as to where i am supposed to start:S can someone give me a push in the right direction?!?
