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1186 ⏐⏐⏐ SYSTEM ANALYSIS: AN INTRODUCTION<br />

I i = 10 mA �0°<br />

+<br />

E i<br />

–<br />

System<br />

+<br />

E o<br />

–<br />

System<br />

Z i = 1.8 k� �0°<br />

E g<br />

R s<br />

Channel 2<br />

FIG. 26.63<br />

Problem 8.<br />

+<br />

–<br />

+<br />

1 k�<br />

VR –<br />

I g<br />

+<br />

Eg –<br />

I o<br />

+<br />

E o = 4.05 V (p�p) �180°<br />

R g<br />

0.5 k�<br />

–<br />

Channel 1<br />

I i<br />

+<br />

E i<br />

–<br />

FIG. 26.62<br />

Problem 7.<br />

7. Determine the output impedance for the system of Fig.<br />

26.62 given the indicated scope measurements.<br />

SECTION 26.3 The Voltage Gains A vNL ,A v, and A vT<br />

8. Given the system of Fig. 26.63, determine the no-load<br />

voltage gain A vNL .<br />

e g<br />

v R<br />

e g : Vertical sensitivity — 0.2 V/div.<br />

v Rs : Vertical sensitivity — 10 mV/div.<br />

9. For the system of Fig. 26.64:<br />

a. Determine A v � E o/E i.<br />

b. Find A vT � E o/E g.<br />

A vNL = –3200<br />

Z i = 2.2 k�<br />

Z o = 40 k�<br />

FIG. 26.64<br />

Problems 9, 12, and 13.<br />

+<br />

E o<br />

–<br />

I o<br />

R L = 5.6 k�

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