Common-emitter amplifier
Common Emitter Amplifier
Bagos, Elyza
Pangilinan, John Oliver
Ateneo de Manila
Loyola Heights, Quezon City
Abstract – This experiment shows the practicality and behavior of a Common Emitter Amplifier circuit through the analysis of its varying input and output signals.
I. INTRODUCTION
The common emitter amplifier circuit makes use of a voltage divider circuit as seen in previous lessons on DC analysis. However, for the small signal analysis portion for this circuit, the objective is to analyze the input and output signals produced by the amplifier. Because of the resulting output signals, which will be discussed further in other sections, this amplifier is essential to AC appliances requiring a certain amount of voltage and current gains.
II. METHODOLOGY
A. Materials and Equipment
To construct the circuit, the electronic devices needed are as follows: capacitors of values 0.33 uF and 0.47uF, resistors of values 56k, 5.6k, 680 and 6.8k, a 2N3904 NPN transistor. Equipment needed for measuring the input and the output signals are a function generator, an oscilloscope, multimeter and a +15V DC power supply. However, because this experiment is a simulation activity, Multisim simulator was used to conduct the experiment.
B. Procedure
To construct the amplifier circuit shown in fig. 1, connect the 56k and 5.6k resistors and the 0.33uF capacitor in parallel to the base terminal of the NPN transistor. After which, connect the 680 resistor to the emitter terminal, and then ground the same resistor together with the 5.6k resistor. Next, connect the 6.8k resistor and 0.47uF in parallel to the collector terminal and supply the same resistor and the 56k resistor with +15V to bias these terminals. Lastly, attach the AC source (function generator) to the ends of these capacitors where 0.33uF as the Vin and 0.47uF as the Vout.
However, to measure in input and output signals, place the CH 1 probes of the oscillator to the 0.33uF with respect
Bagos, Elyza
Pangilinan, John Oliver
Ateneo de Manila
Loyola Heights, Quezon City
Abstract – This experiment shows the practicality and behavior of a Common Emitter Amplifier circuit through the analysis of its varying input and output signals.
I. INTRODUCTION
The common emitter amplifier circuit makes use of a voltage divider circuit as seen in previous lessons on DC analysis. However, for the small signal analysis portion for this circuit, the objective is to analyze the input and output signals produced by the amplifier. Because of the resulting output signals, which will be discussed further in other sections, this amplifier is essential to AC appliances requiring a certain amount of voltage and current gains.
II. METHODOLOGY
A. Materials and Equipment
To construct the circuit, the electronic devices needed are as follows: capacitors of values 0.33 uF and 0.47uF, resistors of values 56k, 5.6k, 680 and 6.8k, a 2N3904 NPN transistor. Equipment needed for measuring the input and the output signals are a function generator, an oscilloscope, multimeter and a +15V DC power supply. However, because this experiment is a simulation activity, Multisim simulator was used to conduct the experiment.
B. Procedure
To construct the amplifier circuit shown in fig. 1, connect the 56k and 5.6k resistors and the 0.33uF capacitor in parallel to the base terminal of the NPN transistor. After which, connect the 680 resistor to the emitter terminal, and then ground the same resistor together with the 5.6k resistor. Next, connect the 6.8k resistor and 0.47uF in parallel to the collector terminal and supply the same resistor and the 56k resistor with +15V to bias these terminals. Lastly, attach the AC source (function generator) to the ends of these capacitors where 0.33uF as the Vin and 0.47uF as the Vout.
However, to measure in input and output signals, place the CH 1 probes of the oscillator to the 0.33uF with respect