Question

D 11.53 The feedback transconductance amplifier in Fig. P11.53 uses a differential amplifier with a voltage gain $mu$, an input resistance $R_{id} = 100 ext{ k}Omega$, and an output resistance $r_{o1} = 1 ext{ k}Omega$; and a MOSFET with $g_m = 2 ext{mA/V}$ and $r_{o2} = 20 ext{ k}Omega$. (a) Find the value of $R_2$ that results in the closed-loop gain $I_o/V_s$ having an ideal value of 100 mA/V. (b) Find the value of $eta$ and sketch the two-port feedback circuit. (c) Find the loading effects of the feedback circuit, $R_{11}$ and $R_{22}$. (d) Give the A circuit and find an expression for A in terms of $mu$. (e) Find the value of $mu$ that results in a 40-dB amount of feedback. (f) Find the realized value of $A_f$. (g) Find $R_{in}$ and $R_{out}$ 800 $Omega$; (b) 0.01 V/mA; (c) 90 $Omega$, 90 $Omega$; (d) 1.687 $mu$ mA/V; (e) 5868 V/V; (f) 99 mA/V; (g) 10 M$Omega$, 2.37 M$Omega$

          D 11.53 The feedback transconductance amplifier in Fig. P11.53 uses a differential amplifier with a voltage gain $mu$, an input resistance $R_{id} = 100 	ext{ k}Omega$, and an output resistance $r_{o1} = 1 	ext{ k}Omega$; and a MOSFET with $g_m = 2 	ext{mA/V}$ and $r_{o2} = 20 	ext{ k}Omega$.
(a) Find the value of $R_2$ that results in the closed-loop gain $I_o/V_s$ having an ideal value of 100 mA/V.
(b) Find the value of $eta$ and sketch the two-port feedback circuit.
(c) Find the loading effects of the feedback circuit, $R_{11}$ and $R_{22}$.
(d) Give the A circuit and find an expression for A in terms of $mu$.
(e) Find the value of $mu$ that results in a 40-dB amount of feedback.
(f) Find the realized value of $A_f$.
(g) Find $R_{in}$ and $R_{out}$ 
800 $Omega$; (b) 0.01 V/mA; (c) 90 $Omega$, 90 $Omega$; (d) 1.687 $mu$ mA/V; (e) 5868 V/V; (f) 99 mA/V; (g) 10 M$Omega$, 2.37 M$Omega$

D 11.53 The feedback transconductance amplifier in Fig. P11.53 uses a differential amplifier with a voltage gain mu, an input resistance Rid = 100 ext kOmega, and an output resistance ro1 = 1 ext kOmega; and a MOSFET with gm = 2 extmA/V and ro2 = 20 ext kOmega.
(a) Find the value of R2 that results in the closed-loop gain Io/Vs having an ideal value of 100 mA/V.
(b) Find the value of eta and sketch the two-port feedback circuit.
(c) Find the loading effects of the feedback circuit, R11 and R22.
(d) Give the A circuit and find an expression for A in terms of mu.
(e) Find the value of mu that results in a 40-dB amount of feedback.
(f) Find the realized value of Af.
(g) Find Rin and Rout
800 Omega; (b) 0.01 V/mA; (c) 90 Omega, 90 Omega; (d) 1.687 mu mA/V; (e) 5868 V/V; (f) 99 mA/V; (g) 10 MOmega, 2.37 MOmega

Added by Tonya C.

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