Question

For the questions below, assume the following device parameters: k'n=µnCox=200 µA/V², ?'p=µpCox=80 µA/V², |VLIN | = infinite Vto,N=Vto,P=0.5V, PHI=|2?F|=0.85V for N and P, ?=0.3 V^0.5, ?=0.1 V^-1 1) Current Mirror: a. The simple mirror in Fig. 1(a) is designed with W/L to have gm=0.25mA/V at 20 µA for the input leg of the mirror with W/L ratio on the output leg 6X larger. If Iref = 20 ??, calculate the output current for Vout = 0.5, 1.0, and 2.0V. b. The mirror is updated to be a standard cascode current mirror in Fig. 1(b), using the same W/L ratios as above for the input leg and output leg. If Iref = 20 µA, calculate the output current for Vout = 0.5, 1.0, 2.0V. c. Calculate the output resistance of these two circuits. Using this resistance, estimate how much the current should change for a 1V change in output voltage change. How does this compare to your answers in (a) and (b)?

          For the questions below, assume the following device parameters:
k'n=µnCox=200 µA/V², ?'p=µpCox=80 µA/V², |VLIN | = infinite
Vto,N=Vto,P=0.5V, PHI=|2?F|=0.85V for N and P, ?=0.3 V^0.5, ?=0.1 V^-1
1) Current Mirror:
a. The simple mirror in Fig. 1(a) is designed with W/L to have gm=0.25mA/V at 20 µA for
the input leg of the mirror with W/L ratio on the output leg 6X larger. If Iref = 20 ??,
calculate the output current for Vout = 0.5, 1.0, and 2.0V.
b. The mirror is updated to be a standard cascode current mirror in Fig. 1(b), using the
same W/L ratios as above for the input leg and output leg. If Iref = 20 µA, calculate the
output current for Vout = 0.5, 1.0, 2.0V.
c. Calculate the output resistance of these two circuits. Using this resistance, estimate
how much the current should change for a 1V change in output voltage change. How
does this compare to your answers in (a) and (b)?

For the questions below, assume the following device parameters:
k'n=µnCox=200 µA/V², ?'p=µpCox=80 µA/V², |VLIN | = infinite
Vto,N=Vto,P=0.5V, PHI=|2?F|=0.85V for N and P, ?=0.3 V^0.5, ?=0.1 V^-1
1) Current Mirror:
a. The simple mirror in Fig. 1(a) is designed with W/L to have gm=0.25mA/V at 20 µA for
the input leg of the mirror with W/L ratio on the output leg 6X larger. If Iref = 20 ??,
calculate the output current for Vout = 0.5, 1.0, and 2.0V.
b. The mirror is updated to be a standard cascode current mirror in Fig. 1(b), using the
same W/L ratios as above for the input leg and output leg. If Iref = 20 µA, calculate the
output current for Vout = 0.5, 1.0, 2.0V.
c. Calculate the output resistance of these two circuits. Using this resistance, estimate
how much the current should change for a 1V change in output voltage change. How
does this compare to your answers in (a) and (b)?

Added by Juan Jos- U.

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