= 0.6 V, Vtp tn For the circuit of Fig. 7.25, let VDD = Vss=2.5 V. = -0.6 V, all channel lengths = 1 um, k = 200 μA/V², k = 80 μA/V², and λ = 0. For IREF = 10 μA, find the widths of all transistors to obtain 12 = 60 μA, 3 = 20 µA, and I5 = 80 µA. It is further required that the voltage at the drain of Q₂ be allowed to go down to within 0.2 V of the negative supply and that the voltage at the drain of Q5 be allowed to go up to within 0.2 V of the positive supply. IREF wwww R + Vast VDD A V SG5 24|1 125 √13 Q3 -Vss

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Publisher:Robert L. Boylestad
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For the circuit of Fig. 7.25, let Vpp Vss=2.5 V, Vn= 0.6 V, Vip= -0.6 V, all channel
lengths = 1 µm, k, = 200 μA/V², k = 80 μA/V², and 2 = 0. For IREF= 10 µA, find the
widths of all transistors to obtain ₂ = 60 μA, 3 = 20 μA, and I = 80 μA. It is further required
that the voltage at the drain of Q₂ be allowed to go down to within 0.2 V of the negative supply
and that the voltage at the drain of Q5 be allowed to go up to within 0.2 V of the positive supply.
IREF
ww
R
VGS1
2₂
VDD A
24
Q3
-Vss
VSG5
Figure 7.25 A current-steering circuit.
VIS
Transcribed Image Text:= For the circuit of Fig. 7.25, let Vpp Vss=2.5 V, Vn= 0.6 V, Vip= -0.6 V, all channel lengths = 1 µm, k, = 200 μA/V², k = 80 μA/V², and 2 = 0. For IREF= 10 µA, find the widths of all transistors to obtain ₂ = 60 μA, 3 = 20 μA, and I = 80 μA. It is further required that the voltage at the drain of Q₂ be allowed to go down to within 0.2 V of the negative supply and that the voltage at the drain of Q5 be allowed to go up to within 0.2 V of the positive supply. IREF ww R VGS1 2₂ VDD A 24 Q3 -Vss VSG5 Figure 7.25 A current-steering circuit. VIS
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