(D)

Figure $20 < 1$ -Refer to Figure 20-1 (A) $\mathrm { R } _ { 1 } = \mathrm { R } _ { 2 } = 30 \mathrm { k \Omega }$

Multiple Choice

(d)

Figure $20 < 1$

-Refer to Figure 20-1 (a) . If $\mathrm { R } _ { 1 } = \mathrm { R } _ { 2 } = 30 \mathrm { k \Omega }$ and the closed loop gain is 450 , the value of the external gain-setting resistor $R _ { G }$ is:

A) $134 \mathrm { k } \Omega$
B) $13.4 \Omega$
C) $134 \Omega$
D) none of the above.