Objectives the purpose of this lab is to build an npnbased common emitter amplifier that amplifies a small ac signal. Test the frequency response of your amplifier by varying the frequency of the waveform generator. Calculate the maximum collector current ic flowing through the load resistor when the transistor is switched fully on saturation, assume vce 0. To design transistor ce amplifier and simulating in multisim software and find its voltage gain. Single stage transistor amplifier electronics post. The voltage gain of a ce amplifier varies with signal frequency. Design of a voltagedivider biased commonemitter amplifier using multisim and mydaq part 2 duration. Feb 19, 2015 understanding rf circuits with multisim 10 a workbook with 21 circuit experiments by tracy shields slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Sep 04, 20 to design a common base amplifier using multisim 1. Unusual lm741 or ua741 opamp power amplifier using darlington output. The resulting circuit can then be verified by spice simulation directly. We had to use 2n3904 npn bjt, resistor and capacitor.
It can be observed in following graph that the value of resonance frequency is 93. Instead of a function generator or ac signal, is it possible to input an audio file and see its output in an oscilloscope. Keep in mind the amplifier is for small signals vin 50mvpk and that the design is to be relatively independent of transistor. Heres a classic circuit thats still an essential building block of circuits today, both ic and discrete. Calculate voltage gain and bandwidth of ce amplifier from the observations made. Students will investigate the frequency response of two amplifier circuits, one made with transistors and the other using opamps. By reading the above information you have got an idea about this concept. We would make a ce amplifier and a cecb cascode amplifier and compare their gain and bandwidth.
Analyze singlestage bjt amplifier and measure the gain and input resistance study the behavior of singlestage bjt amplifier and measure the input resistance of a singlestage bjt amplifier components. Experiment the experiments will be performed with a npn bjt 2n2222a. Due to miller effect the amplifiers with increased gain demonstrate decreased bandwidth. Multisim simulation of common collector amplifier youtube. This bypass capacitor makes a huge difference in ac gain and input impedance of the ce amplifiers as shown in. High voltage gain but maximum current gain of 1 it has a voltage gain equal to 10 times of a common emitter amplifier has a high output. The purpose of biasing is to establish a qpoint about which variations in. Measure the voltage gain of the amplifier to see how it compares with your calculated voltage gain.
Electronics workbench multisim 8 simulation and capture. How to simulate in multisim power amplifiers electro az. Multisim has an intuitive interface that helps educators reinforce circuit theory and improve retention of theory throughout engineering curriculum. Complete the following steps to design a common emitter amplifier using the common. Measure dc operating voltages at each circuit nodes, voltage gain, input, output impedance of the amplifier and compare the values to the prelab. Construct common emitter ce amplifiers simulated in the prelab analysis. Figure 1 cascaded common emitter swamped amplifier ewb version 5 voltage gain calculations. Electronic circuits lab geethanjali group of institutions. The difference in two amplifier designs shown above is the connection of emitter bypass capacitor c 3. This is a quick tutorial for teaching students of elec 2210 how to use multisim for bipolar transistor circuit simulation. This article discusses the working of the common emitter amplifier circuit and its applications. Ph 210 electronics laboratory i instruction manual index page no general instructions 2 experiment 1 common emitter ce amplifier 4 experiment 2 multistage amplifier.
By comparing how their frequency responses differ while still providing the same overall function, students will learn about how different input frequency ranges affect. Circuit analysis with multisim circuit a multisim circuit multisi. Common emitter amplifier working principle and its. Experimentations with multisim the goal of this laboratory is to learn some useful features of the multisim simulation software and to highlight some differences between the computations as they are done in class and the results of multisim simulations and benchtop e xperiments.
Commonemitter amplifier vsupply 1 0 dc 12 vin 3 0 rc 1 2 10k rb 3 4 100k q1 2 4 0 mod1. Commonemitter ce circuits are the basic and important amplifiers in analog electronics. The voltage gain of a single stage transistor amplifier is the ratio of a. To design a common base amplifier using multisim 1. An common emitter amplifier circuit has a load resistance, r l of 1. Jan 09, 2020 voltage gain of single stage transistor amplifier. Simulate and measure ce amplifier gain at different frequencies. You can accurately model actual slew rate effects of overdriving an amplifier circuit by cascading the amplifier with this component. Multisim tutorial using bipolar transistor circuit. Multisim tutorial using bipolar transistor circuit updated february 10, 2014. Bipolar junction transistors npnbjt2n2222a lab objective. Objectives study and characterize bjt amplifier in common emitter ce configuration.
Compare your results with multisim simulations both ac and dc. There are different types of electronic components in the common emitter amplifier which are r1 resistor is used for the forward bias, the r2 resistor is used for the development of bias, the rl resistor is used at the output it is called as the load resistance. Transistors the commonemitter amplifier 1430 experiment 8 how to. Spice is the industry standard circuit simulation engine, developed here at berkeley. Characteristics of a ce amplifier a ce transistor amplifier has the following characteristics. The purpose of biasing is to establish a qpoint about which variations in current and voltage can occur in response. The lab preparation using multisim simulation tool must be completed before coming to the. The commonemitter ce transistor amplifier configuration is widely used. Compared to a single amplifier stage, this combination may have one or more of the following characteristics.
It provides large voltage gain typically tens to hundreds and provides moderate input and output impedance. Common collector amplifier basic electronics tutorials. Mar 31, 2019 compared to a single amplifier stage, this combination may have one or more of the following characteristics. The experiments will be posted here 1 week before each lab, along with any tutorials needed to complete the prelaboratory work. Gainbandwidth product gbw in ce amplifies remains approximately constant. Download citation simulation and analysis of the commonemitter circuit in analog. The gain is a strong function of both temperature and bias current, and so the actual gain is somewhat unpredictable. Common emitter configuration commonly used in lownoise amplifiers. Suppose youre asked to design a transistor amplifier for a voltage gain of 3. How to draw ce amplifier circuit using multisim software youtube. A common base amplifier is such an amplifier which has the following charecteristics. Spice itself is extremely difficult to learn and use, so programs such as multisim provide an intuitive front end for the powerful spice engine. First of all, we have added a voltage source with a capacitor and then two other resistors were added.
Schematics of the bjt amplifier circuit simulated input and output waveform. This component limits the absolute slope of the output, with respect to time, to some maximum or value. Based on the ads tools of loadpull and sourcepull, the optimal load impedance. Simulation and analysis of the commonemitter circuit in analog. It is an offline setup file of ni multisim ultiboard electronics circuit design suite 14. Experiment 10 bjt ce amplifier page 3 experiment 10. A classb power amplifier with high output power and high power added efficiency pae is designed in this paper. Hence, in order to determine the voltage gain, you should consider only the a. You stare at it, knowing the power it contains and what it has done for the world. How to simulate in multisim power amplifiers youtube. Nov 27, 2015 how to draw ce amplifier circuit using multisim software. Frequency response of common collector amplifier objective the purpose of the experiment is to analyze and plot the frequency response of a common collector amplifier. If the signal is 1800 out of phase and gain will be 1.
To design the single sided pcb layout for common emitter amplifier circuit with multisim. A common collector amplifier is one of three basic singlestage bipolarjunctiontransistor bjt amplifier topologies, typically used as a voltage buffer. This lab introduces students to the importance of frequency response when designing circuits. Cascade of two ce stages 7 experiment 3 push pull amplifier 9 experiment 4 op amp circuits 11 experiment 5 filter circuits feed back circuit. Study of negative feedback amplifier circuit based on multisim. Pdf design and simulation for a highefficiency classb. It is because reactances of the capacitors in the circuit changes with signal frequency and hence affects the output voltage. The first input is called inverting represented by, and the other terminal is called noninverting input.
Jan 26, 2016 how to make amplifier at home 2sc5200 mosfet 100 watt. Design the amplifier to achieve a smallsignal gain of at least a v 200 vv and i c 1 ma. The cascode is a twostage amplifier that consists of a commonemitter stage feeding into a commonbase stage. Design and create single sided pcb layout for common emitter amplifier ce. Researchers and designers use multisim to reduce pcb prototype iterations and save development costs by adding powerful circuit simulation and analyses to the design flow. To examine the common emitter ce amplifier characteristic of transistor. These courses run concurrently and the aim of the manual is to introduce students to laboratory procedure including data recording and report writing. Thus, the commonemitter amplifier is called an inverting amplifier circuit. You will be using a 2n2222 transistor so your data will be different.
The potentiometer default increment value 5% is too big. The ce amplifier provides high gain and wide frequency response. The curve drawn between voltage gain and the signal frequency of an amplifier is known as frequency response. Although the common collector amplifier is not very good at being a voltage amplifier, because as we have seen, its small signal voltage gain is approximately equal to one a v. Ece 311 electronics i iii july 2011 notes about the course electronics i consists of a theoretical module ece 320 and a practical module ece 311. Common emitter amplifier circuit working and characteristics. Commonemitter amplifiers give the amplifier an inverted output and can have a very high gain that may vary widely from one transistor to the next. Sep 23, 2017 how to simulate in multisim power amplifiers electro az. Understanding rf circuits with multisim 10 a workbook with 21 circuit experiments by tracy shields slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Geethanjali college of engineering and technology department of electronics and communications engineering. To visualize the operation of a transistor in an amplifier circuit, it is often useful to represent the.
Commonemitter amplifiers are also used in radio frequency transceiver circuits. First of all, we have designed the ce bjt amplifier with voltage divider bias circuit by multisim, the same circuit was built in the lab too. Common emitter bjt amplifier wizard multisim help national. This site uses cookies to offer you a better browsing experience. Operational amplifier op amp is a three terminal electronic device which has two inputs of high impedance. The data below were collected for the example of a npn 2n36443 transistor using the circuit below. Download multisim circuit explorer and enjoy it on your iphone, ipad, and ipod. The commonemitter amplifier bipolar junction transistors. Construct common base cb amplifier simulated in the prelab analysis 2. This satisfies the barkhausen condition for sustaining oscillations and total loop gain of. The latter capacitance between base and collector gives rise to so called miller effect. Figure 72 illustrates two possible ce amplifier design. How to draw ce amplifier circuit using multisim software.
It is written such that no prior multisim knowledge is required. Experiment 2 bjt common emitter ce amplifier objective design the amplifier for voltage gain a v and choose resistor values of rc, re, r1 and r2 by calculation. Study aids, multisim, and lt spice files for this chapter are. Rcphase shift oscillator has a ce amplifier followed by three sections of rc phase shift feedback networks. Study the effect of a load resistor on a follower with the multisim desktop\mulitisim\lab 4 \ follower schematic, shown at right. To draw the frequency response curve of ce amplifier. The basic transistor amplifier circuit is indicated below. Advanced students can challenge themselves to research highspeed opamps and compare their designs and specifications to regular opamps. The ac signal voltage gain is defined as a v v o v i where v o and v i can both be rms, peak, or peakpeak values.
The prelaboratory work is within the experiment document itself, you are expected to download and complete the prelab prior to attending lab. High voltage gain but maximum current gain of 1 it has a voltage gain equal to 10 times of a common. To design a common base amplifier using multisim slideshare. I have designed the circuit in the question tda2002 audio amplifier using multisim. This is an example of a high input impedance mosfet amplifier. Ce amplifiers exhibit high voltage gain and high current gain. Design and analyze ce amplifier using multisim software. Here you will use your transistor to amplify some spikes. It is called a common emitter amplifier since the emitter is common to both the input circuti and the output circuit. You can now explain with confidence what pdoping, ndoping, and depletion layers mean. Pcb design practicalcommon emitter amplifier circuit. For the amplifier circuit shown above, students will draw the dc equivalent circuit and calculate the following dc quantities. Cascaded common emitter swamped amplifier experiment.
100 799 1209 1431 1419 1212 1042 92 519 754 482 456 275 642 1012 1006 407 856 897 1002 400 1437 1511 197 451 1257 877 623 1035 640 32 106 211 816 1045 907 748 1035 1061 220 91 269 733 504 33 1274