Question

Question 2. [16 points] VDD VDD RD RD Vout Vout R1 C1 Vin Vin R2 C2 (a) (b) Fig. Q2 All transistors are in the saturation region with the transconductance gm, and ? = 0. In Fig. Q2(a), R1 + R2 >> RD. In Fig. Q2(b), assume the pole-frequencies due to C1 and C2 are all much higher than the frequency of interest (i.e., mid-band). Note: please use the approach of “breaking the feedback network” to resolve the feedback network problems. (a) Identify the feedback topology in Fig. Q2(a). (b) Find the expression of the mid-band gain in Fig. Q2(a). (c) Find the expression of the mid-band input impedance in Fig. Q2(a). (d) Find the expression of the mid-band output impedance in Fig. Q2(a). (e) Identify the feedback topology in Fig. Q2(b). (f) Find the expression of the mid-band gain in Fig. Q2(b). (g) Find the expression of the mid-band input impedance in Fig. Q2(b). (h) Find the expression of the mid-band output impedance in Fig. Q2(b).

          Question 2. [16 points]
VDD
VDD
RD
RD
Vout
Vout
R1
C1
Vin
Vin
R2
C2
(a)
(b)
Fig. Q2
All transistors are in the saturation region with the transconductance gm, and ? = 0. In Fig. Q2(a),
R1 + R2 >> RD. In Fig. Q2(b), assume the pole-frequencies due to C1 and C2 are all much higher
than the frequency of interest (i.e., mid-band). Note: please use the approach of “breaking the
feedback network” to resolve the feedback network problems.
(a) Identify the feedback topology in Fig. Q2(a).
(b) Find the expression of the mid-band gain in Fig. Q2(a).
(c) Find the expression of the mid-band input impedance in Fig. Q2(a).
(d) Find the expression of the mid-band output impedance in Fig. Q2(a).
(e) Identify the feedback topology in Fig. Q2(b).
(f) Find the expression of the mid-band gain in Fig. Q2(b).
(g) Find the expression of the mid-band input impedance in Fig. Q2(b).
(h) Find the expression of the mid-band output impedance in Fig. Q2(b).

Question 2. [16 points]
VDD
VDD
RD
RD
Vout
Vout
R1
C1
Vin
Vin
R2
C2
(a)
(b)
Fig. Q2
All transistors are in the saturation region with the transconductance gm, and ? = 0. In Fig. Q2(a),
R1 + R2 >> RD. In Fig. Q2(b), assume the pole-frequencies due to C1 and C2 are all much higher
than the frequency of interest (i.e., mid-band). Note: please use the approach of “breaking the
feedback network” to resolve the feedback network problems.
(a) Identify the feedback topology in Fig. Q2(a).
(b) Find the expression of the mid-band gain in Fig. Q2(a).
(c) Find the expression of the mid-band input impedance in Fig. Q2(a).
(d) Find the expression of the mid-band output impedance in Fig. Q2(a).
(e) Identify the feedback topology in Fig. Q2(b).
(f) Find the expression of the mid-band gain in Fig. Q2(b).
(g) Find the expression of the mid-band input impedance in Fig. Q2(b).
(h) Find the expression of the mid-band output impedance in Fig. Q2(b).

Added by Raymond B.

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