Complete the following: (a) Determine the four resistor values to provide the de

Question

Complete the following:
(a) Determine the four resistor values to provide the design gain indicated, and express the % error you get by using standard 1% resistor values.
(b) Using the value for A from the ?741 data sheet , determine the effective design gain for each stage, G.
(c) Using the information given about the source and load, draw an accurate two-stage amplifier model
of this system, labeling all resistances correctly. Determine the realized voltage gain from input to
output, A_{v} = rac{v_{o}}{v_{i}}, , and the realized gain from source to output, rac{v_{o}}{v_{s}}, . What is the percent difference between the effective design gain (which accounts for finite A) and the actual realized gain?

R4 R1 200 R3 741 o 50 M2 Source vs = 10mV rms v.10 mV rms Load Choose R1, R2, R3, R4 from 1% resistor table. Design Gain of Stage 10 (V/V) Design Gain of Stage 220 (VV)

Explanation / Answer

Av1= gain at first stage = -R2/R1

10= R2/R1

R2=10R1

Av2= -R4/R3

20=R4/R3

R4=20R3

Let R1=R3=100

R2=1000 ohm

R4= 2000 ohm

(B) A = open loop gain for 741 = 200x10^3

Av1ef= effective gain at first stage

=- AR2/(R1+R2+AR1)

=-(2*10^8)/(1100+2*10^7)

=-9.999

Similarly for second stage, Av2=-19.997

(C) Av = vo/vi=over all voltage gain = 10*20= 200

Avs=vo/vs=Av*R1/(200+R1) = Av/3= -66.66

=

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