Question
Asked Oct 6, 2019
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Some of the exercises show op-amps with a positive supply voltage but no information about negative supply voltages. Whenever this is encountered, assume the negative supply voltage has the same magnitude as that of the positive supply
Exercise 4.4.4
About
Vcc = 6 V
Do 4 k
70 kQ
5 ΚΩ
20 kΩ
10 kQ
(a)For the circuit in the figure above, what should the resistance value of R be so as to have
maximum transfer of power into it?
Feedback?
+
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Exercise 4.4.4 About Vcc = 6 V Do 4 k 70 kQ 5 ΚΩ 20 kΩ 10 kQ (a)For the circuit in the figure above, what should the resistance value of R be so as to have maximum transfer of power into it? Feedback? +

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Expert Answer

Step 1

The given circuit is shown below, after marking nodes

Vec 6 V
Do 4 kn
70 k
5 kn
20 k
: RL
10 kn
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Vec 6 V Do 4 kn 70 k 5 kn 20 k : RL 10 kn

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Step 2

Although Op-amp,  shown above is  ideal ,hence the current in inverting and non-inverting terminal is zero.

= i, =0A
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= i, =0A

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Step 3

the virtual ground concept for ideal op-amp, says that the voltages of th...

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