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A MOS differential amplifier with IT = 0.4 mA is shown in the figure. Assume γ1 = γ2 = 0 , λ1 = λ2 = 0, RD1 = RD2 = 2.5KΩ, VT0 = 0.7 V, μnCox = 100 μA/V2 , $(\frac {W}{L})$1 = 24 and $(\frac {W}{L})$2 = 26. (a)Estimate the value of the input differential signal Vid = VGS1 - VGS2 , that causes differential output voltage equal to zero. (b)Estimate the value of the input differential signal Vid = VGS1 - VGS2 , that causes ID1 = 0.7IT. (c)Estimate the common mode gain of the circuit, if the channel length modulation parameter of the transistor realizing IT is 0.05V-1. (d)Estimate the CMRR if RD1 = 2.5KΩ and RD2 = 2.6KΩ. |
May 11, 2018 |
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