For NMOS 1 um technology: AnCox = 100 MA/V?, VI= 0.5 V, 2 = 0.1 V-1
Let a NMOS cascode current mirror with a reference current of 120 A and a supply voltage of 5 V.
Assume the overdrive voltages of mirror transistor and cascode transistor are 150 mV and 100 mV,
respectively. Identify the following:
a) Minimum headroom voltage required for the above current mirror acts as current source
b) Aspect ratios of the transistors
c) Output impedance of the current source

Question

For NMOS 1 um technology: AnCox = 100 MA/V?, VI= 0.5 V, 2 = 0.1 V-1

Let a NMOS cascode current mirror with a reference current of 120 A and a supply voltage of 5 V.

Assume the overdrive voltages of mirror transistor and cascode transistor are 150 mV and 100 mV,

respectively. Identify the following:

a) Minimum headroom voltage required for the above current mirror acts as current source

b) Aspect ratios of the transistors

c) Output impedance of the current source

a 3) For NMOS 1 um technology: k.Cox = 100 A/V, Vi=0.5 V, 2 = 0.1 V-1 Let a NMOS cascode current mirror with a reference current of 120 MA and a supply voltage of 5 V. Assume the overdrive voltages of mirror transistor and cascode transistor are 150 mV and 100 mV, respectively. Identify the following: a) Minimum headroom voltage required for the above current mirror acts as current source b) Aspect ratios of the transistors c) Output impedance of the current source

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