____________________________________________________

FACULTY OF TECHNICAL AND VOCATIONAL

EDDUCATION

BBV30303 ELECTRONIC 2

EXPERIMENT REPORT 2

(SIMPLE AMPLIFIER)

MEMBER GROUP

BIL NAMA MATRIK

1. Azman Bin Hanafiah DB120004

2. Muhammad Nazmy Bin Zulkifli DB120075

Check By:

Dr. Alias Bin Masek

Pensyarah Elektronik II

1.0. TITLE

Simple Amplifier

2.0. AIM

To improve our knowledge about amplifier

3.0. OBJECTIVES

3.1. To understand the operation of transistor amplifier.

3.2. To calculate the voltage gain of the amplifier.

3.3. To understand the relationship between the operating point and distortion.

4.0. EQUIPMENTS

4.1. Experiment odule: KL-13008/ KL-21001

4.2. Instrument experiment:

4.2.1. Multimeter

4.2.2. Oscilloscope

4.2.3. Signal power supply

4.3. Basic tools

5.0. THEORY

there are three basic configurations of transistor amplifiers. They are known as the

common-base (CB), Common-emitter (CE), and Common-Collector (CC) amplifiers. The

amplifier circuit shown in fig. 5-1-1 can be considered as the CE amplifier or the CC

amplifier which depends on the output signal taken from. In other words, if the output

signal is from collector, the circuit is the CE amplifier. If the output signal is from the

emitter, the circuit acts as the CC amplifier or emitter follower. When these two are

combined, the circuit is also called the split-phase amplifier because the two output

signals have a phase difference of 1800.

In figure 5-1-1, Vcc and voltage divider (R1 and R2) provides a forward bias to determine

the operating point of TR1, and the point is usually set at VCE=1/2 Vcc for linear

amplification. When the input signal is coupled to the base, the variation of the base

current results in the variations of the collector current and the emitter current.

The voltage gain of an amplifier is defined as the ratio of the output voltage to the input

voltage. It can be expressed by the formula Av=Vo/Vi.

Similarity, the current gain is the ratio of the output current to the input current. That is

Ai=Io/Ii. The power gain is the product of Av and Ai. It can be expressed as Ap=Av X Ai,

or Ap = Po/Pi.

6.0. PROCEDURE AND RESULT

6.1. Set the module KL- 13008 on the main unit KL-21001, and locate the block a.

6.2. According to fig. 5-1-1 and fig. 5-1-2, complete the experiment circuit with short-

circuit clips.

6.3. Apply +10V to terminal V+.

6.4. Using the DC Voltmeter, measured and recorded the voltages at terminals B,C,

and E of transistor 1.

VB=1.21 V; VC= 4.74V; VE= 0.5V

Figure. 5-1-1 Figure. 5-1-2

Measured the voltage drop across R3 and then calculate the collector current Ic

using Ohms Law.

Ic = VR3 / R3 = 5.27 mA.

6.5. Set the function switch of function generator to sine wav position and range

switch to 1KHz (100Hz- 1KHz) Position.

Connect oscilloscope input to function generator output.

Measure the output signal to obtain a sine wave of 1KHz, 0.5Vp-p by adjusting

frequency and amplitude controls knobs.

Then apply it to terminal Vin.

Vin = 0.5Vp-p.

6.6. Using the oscilloscope, measure and record the output voltage at the collector.

V01= 4.2Vp-p

Calculate the voltage gain Av1= V01/ Vin = 8.4

6.7. Measured and recorded the output voltage at the emitter.

V02= 0.45Vp-p.

Calculate the voltage gain AV2= V02/Vin = 0.9

6.8. Reduce Vin to 0Vp-p. Measure and recorded the output voltages

V01=0.2Vp-p.

V02=0.2Vp-p

6.9. Slowly raise the input voltage Vin and observe the change in output voltage (V01

or V02).

Does the output voltage become higher and lower? HIGH

Raise the input voltage Vin (Greater than 0.5 Vp-p) until the output V01 appears

a maximum undistorted waveform.

Measure and record the voltages of Vin, V01 and V02.

Vin=0.9Vp-p; V01=1Vp-p; V02= 9Vp-p

6.10. Calculate Av1= 8.4, Av2=0.9

7.0. DISCUSSION

Based on the experiment amplifier is used to increase the amplitude of a signal

waveform, without changing other parameters of the waveform such as frequency or

wave shape. They are one of the most commonly used circuits in electronics and

perform a variety of functions in a great many electronic systems.

The gain of an amplifier is a measure of the "Amplification" of an amplifier, i.e.

how much it increases the amplitude of a signal. More precisely it is the ratio of the

output signal amplitude to the input signal amplitude, and is given the symbol "A". It can

be calculated for voltage (Av), current (Ai) or power (Ap), When the subscript letter after

the A is in lower case this refers to small signal conditions, and when the subscript is in

capitals it refers to DC conditions.

8.0. CONCLUSION

Based on the experiment we have to understand the operations of transistor amplifiers

and we know how to calculate the voltage gain of the amplifier. The last one is we can

understand the relationship between the operating point and distortion.

9.0. EXPERIMENT ACTICITY (PICTURE)

Figure 1: Using Oscilloscope to mesure the sine wave for amplifire circuit

Figure 2: Setup the Module KL-13008 on KL-21001

Figure 3: Take the result on the oscilloscope

Figure 4: To find out the output voltage at the collector

Figure 5: The result showed on oscilloscope