Linear and Digital Experiments

LINEAR AND DIGITAL EXPERIMENTS

STUDY ASSIGNMENT

This booklet contains three examinations. For this series of examinations, operation of the XK-200 Digital Trainer must be fully understood. In addition, each examination is based upon your understanding of the principles involved and the application of them in performing stated experiments with the XK-200 Digital Trainer and the supplied Parts Kits.

Before indicating your answers, you should review the indicated lessons and perform the experiments covered in the specified experiments workbook listed below.

Examination 2711A:

1. Review lessons B0701 through B0706 (assignment 2708A-B Pulse Circuits). 2. Use Parts Kit B0740 with XK-200 Digital Trainer 3. Perform experiments given in lesson B0741 Experiments with Pulse Circuits

Examination 2711 B:

1. Review lessons B0801 through B0806 (assignment 2709A-B Logic Circuits) 2. Use Parts Kit B0840 with XK-200 Digital Trainer 3. Perform experiments given in lesson B0841 Experiments with Logic Circuits

Examination 2711C:

1. Review lessons B0901 through B0906 (assignment 2710A-B Linear and Digital Integrated Circuits)

2. Use Parts Kit B0940 with XK-200 Digital Trainer 3. Perform experiments given in lesson B0941 Experiments with Linear Integrated

Circuits

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EXAMINATION 2711A1

Linear and Digital Experiments When you feel confident that you have mastered the material in this lesson, complete the following examination. Then submit only your answers to school headquarters for grading, using one of the examination answer options described in your first shipment. Send your answers for this examination as soon as you complete it. Do not wait until another examination is ready.

Questions 1-10: Select the one best answer to each question. 1. For the circuit below, what will be the output waveform?

X LED

A. 5VI -5 v

4.7 kn

noon 1 2 3 4 sec.

B. 5VI----~~--~2~--~3----~ 4 sec.

-5 v

+5 v

14 13 12 WLED

7473 11 10 9

7 8 -:-

5VI C.

-5 v

D.5VI----1 2 3 4sec. -5 v

2. Ifthe value ofRA was increased by 25% in experiment 7 what effect would this change have on the duty cycle?

A. Increase to 0.30 C. Decrease to 0.21 B. Decrease to 0.18 D. No significant change

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3. For the circuit of Fig. 2 in the text, what effect does changing the lk!2 resistor be­tween pin 1 and pin 3 to 18k!2 have on the output of the circuit?

A. The voltage increases C. The frequency increases B. The voltage decreases D. The frequency decreases

4. For the circuit shown below, what would be the resulting waveform?

100 kn

>---o----o X LED

10 kn ~

SVI SVI A. D D D D C. 1 2 3 4 sec. 2 3

-5 v -5 v 4 sec.

··r I n."·r ~ ~ B. 1 2 3 4 sec. 1 v. 3 ~sec. -5V -5 v

5. With both logic switches down, and A connected to the X light, B to Z, A to Y and B toW, which lights will be on?

A. X and Z C. All four B. Y and W D. None

6. In Experiment 1, how many cycles per minute did you count in step 4?

A. About 10 C. About60 B. About 30 D. About 100

7. If E:xperiment 7 is set up with Ra = 18Kn, Rb = 68Kn, and C = 0.04~F. calculate D.

A. 0.44 B. 0.56

c. 0.79 D. 0.92

8. Which devices are used to prevent transients from triggering logic circuits?

A. Multivibrator circuits C. Differentiator circuits B. Clippers D. Integrator circuits

9. If in Experiment 2 the value of the capacitor is changed to l.O.~o~F and the resistance is left at lSKn, what results?

A. A pulse similar to the input B. A pulse similar to the results with R = 18Kn and C = 10~F C. A pulse similar to the results with R = 1Kn and C = lO~F D. No LED lights- the pulse is too small.

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10. Using the simple logic probe of Experiment 9, test the 'outputs of Experiments 2 and 3. (Use only the 18kf2 resistor in your test circuits.) What is the result?

A. The logic probe LED lights for Experiment 2, but does not light for Experiment 3. B. The logic probe LED lights for Experiment 3, but does not light for Experiment 2. C. The logic probe LED does not light for either Experiment. D. The logic probe LED lights for both Experiments.

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NOTES

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EXAMINATION 27118

Linear and Digital Experiments When you feel confident that you have mastered the material in this lesson, complete the following examination. Then submit only your answers to school headquarters for grading, using one of the examination answer options described in your first shipment. Send your answers for this examination as soon as you complete it. Do not walt until another examination is ready.

Questions 1·10: Select the one best answer to each question.

1. What data nibble turns on the logic system shown?

As

":'"

A. 2

A3

Az 4

5 A,

Ao

":'"

A. 000000 B. 111111

3

11

2

4

c. 100001 D. 011110

2. For the circuit shown, an input of A = 0, B = 0 gives a ---- output and an input of A= 0, B = 1 gives a output.

A--...;3~

B--...;5~

A. 1,1 B. 0,1

7

~2-------z

c. 1,0 D. 0,0

3. What type of logic results from the circuit shown in question 2?

A. OR C. NAND (NOT AND) B. AND D. NOR (NOT OR)

4. What will be the outputs of the circuit shown for inputs of 010011 and 101000?

As

A. 2

A3 4

5 A2

A, 12

Ao 13

A. 1,1 B. 1,0

2

6

11

11

c. 0,1 D. 0,0

~3---z

5. For the circuit in question 4, what will be the outputs for inputs of 111111 and 000000?

A. 1,1 B. 1,0

c. 0,1 D. 0,0

6. For the circuit shown below, which logic indicator is turned on when switch 1 is in the up position?

8

4

A. X only C. Neither X or Y B. Y only D. Be '\andY

7. The binary number 10100111 is equal to----m hexadecimal notation.

A. 5E C. 7A B. E5 D. A7

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8. With your trainer set up as in Experiment 6, Step 2 and ali logic switches set to logic high, where must NOT gates be added to have only the W and Z lights on?

A. Between X and SW2 and between Y and SW3 B. Between Wand SWl and between Y and SW3 C. Between X and SW2 and between Z and SW 4 D. Between Wand SWl and between Z and SW4

9. The type of logic which results in the circuit shown is

3 2

A---t---. ..-s __ z

B--...... 2 2

A. OR. C. AND. B. NAND. D. XOR.

10. Wire Experiment 2 using the OR gate instead of the AND gate and connect one input to ground. The output of this circuit will give a logic high when the second input is above

A. 2.0 V. C. 3.5V. B. 3.0 V. D. 4.0 V.

9

NOTES

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EXAMINATION 2711C1

Linear and Digital Experiments When you feel confident that you have mastered the material in this lesson, complete the following examination. Then submit only your answers to school headquarters for grading, using one of the examination answer options described in your first shipment. Send your answers for this examination as soon as you complete it. Do not wait until another examination is ready.

Questions 1-10: Select the one best answer to each question.

1. To increase the gain of the IC386 audio amplifier in Experim~nt 8,

A. the resistance between pins 1 and 8 must be increased. B. the resistance between pins 1 and 8 must be decreased. C. the capacitance between pins 1 and 8 must be increased. D. the capacitance between pins 1 and 8 must be decreased.

2. If the input voltage to the circuit shown is 5-V, the output voltage will be

+CLK es kn

2.2 kn

OUTPUT

- + ":'

100~F 100 kn

22n

":"

':" -

A 0.05V. c. 5V.

B. 0.23V. D. 19 V.

3. If your D-A converter is calibrated to give an analog output of 4.3 V for a binary input of 0111 (7), what will its output be for a binary input of 1111 (15)?

A. 8.0V C. 9.8V B. 9.2 V D. 15 V

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4. The circuit shown below is

10 kn 2 e,o---------~~~--~~~

10 kn

A. an adder. B. a subtractor.

100 kn

5v

100kn

C. an inverting amplifier. D. a noninverting amplifier.

5. If the voltage at e2 is zero for the circuit shown in Question 4, the circuit could function as

A. an adder. C. an inverting amplifier. B. a sub tractor. D. a noninverting amplifier.

6. If the clock signal amplitude was decreased by 50% in experiment 3, what value of output voltage for the divider and amplifier would be measured?

A. 40mV, 0.4 volts B. 32mV, 0.32 volts C. SOmV, 0.5 volts D. 25mV, 0.25 volts

7. What effect does changing the 10 kn resistor between pins 1 and 5 to 100 kn in Experiment 7 have on the pin output?

A. The frequency increases slightly B. The frequency decreases slightly C. No voltage is present at pin 1 D. The voltage does not vary

8. What happens if a voltage of 0.8 V is applied to pin 6 of Experiment 6?

A. 1111 and 1110 blink alternately B. 1111 and 0000 blink alternately C. 1111 is on D. The circuit counts upward

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9. What happens if the signal to the inverting input is larger than the signal to the non­inverting input of the comparator of Experiment 5?

A A large negative output results B. A large positive output results C. A small positive output results D. A small negative output results

10. After completing step 3 of Experiment 3, what would be the result of moving the potentiometer input from pin 3 to pin 2?

A. Pin 1 voltage goes negative B. Pin 1 voltage rises sharply C. Pin 1 voltage falls sharply D. Pin 1 voltage stays about the same

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