PROBLEM 7.3 A two-stage amplifier is shown in Figure 7.75. It is constructed by cascading two one-stage amplifiers of the type seen in Problem 7.2. In analyzing this amplifier, use the MOSFET model described in Problem 7.2 and illustrated in Figure 7.74. V.

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PROBLEM 7.3
A two-stage amplifier is shown in Figure 7.75. It is constructed
by cascading two one-stage amplifiers of the type seen in Problem 7.2. In analyzing
this amplifier, use the MOSFET model described in Problem 7.2 and illustrated in
Figure 7.74.
Vs
Vs
R
+
+
VOUT
VIN
VMID
a) The fact that a second amplifier stage is connected to the first amplifier stage does
not change the operation of the first stage. That is, the relation between vMID
VN here is the same as the relation between VOUT and vin in Problem 7.2. Why?
What terminal characteristic of the second MOSFET must change in order for this
and
not to be true?
b) Derive the relation between vMID and vN for 0 < vN, and the relation between
for 0 < VMID < Vs. (Hint: see Problem 7.2.)
VOUT
and
UMID
c) Derive the relation between VOUT and VỊN for 0 < vN.
www
Transcribed Image Text:PROBLEM 7.3 A two-stage amplifier is shown in Figure 7.75. It is constructed by cascading two one-stage amplifiers of the type seen in Problem 7.2. In analyzing this amplifier, use the MOSFET model described in Problem 7.2 and illustrated in Figure 7.74. Vs Vs R + + VOUT VIN VMID a) The fact that a second amplifier stage is connected to the first amplifier stage does not change the operation of the first stage. That is, the relation between vMID VN here is the same as the relation between VOUT and vin in Problem 7.2. Why? What terminal characteristic of the second MOSFET must change in order for this and not to be true? b) Derive the relation between vMID and vN for 0 < vN, and the relation between for 0 < VMID < Vs. (Hint: see Problem 7.2.) VOUT and UMID c) Derive the relation between VOUT and VỊN for 0 < vN. www
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