Question: The circuit shown in Figure 2 is a current mirror. Find the value of Vt and K, based on that value write the expression for

The circuit shown in Figure 2 is a current mirror. Find the value of Vt and K,  based on that value write the expression for ID3. If the two MOSFETs are matched, what is the current ID4?

VDD,= 8V External circuit 10k2 ID3 R1 8Vdc i 10k2 ID4 Q3

VDD,= 8V External circuit 10k2 ID3 R1 8Vdc i 10k2 ID4 Q3 Q4 VG -Vss = -8V Figure 2. A Current Mirror circuit.

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