The basic transistor amplifier circuit is indicated below. Common emitter amplifier working principle and its. To design transistor ce amplifier and simulating in multisim software and find its voltage gain. Simulation of circuit performance with multisim and comparison with measured values. The objective of this laboratory exercise was to design, simulate, build and test a single stage h biased amplifier to design specifications and requirements. Labview is systems engineering software for applications that require test, measurement, and control with rapid access to hardware and data insights. For other transistors, such as pnptype transistors and elde ect transistors these considerations have to be modi ed, although the basic approach to the analysis remains unchanged. The voltage gain, a, of the common emitter amplifier can be expressed as the ratio of load resistor r l to the small signal emitter resistance r e. Draw the common emitter amplifier using the components that are. In this exercise you will vary the temperature of the emitter resistor re to see its effect on the amplifier s gain. It is concluded that a virtual simulation on electronic circuits with multisim 10 can. Select your multisim designer edition national instruments. This is a commonemitter amplifier, which amplifies the input voltage about 10 times. Vi sem ece simulation practical lab manual diploma.
Pcb design for common emitter amplifier with multisim youtube. Commonemitter ce circuits are the basic and important amplifiers in analog. Multisim tutorial using bipolar transistor circuit circuit. Simulation and analysis of the commonemitter circuit in analog. C b r in i supply i 1 q 1 r e i b 1kr b r c kr b v cc v e v c c c c e r g r l v out v in figure 1. Complete the following steps to configure and run a temperature sweep analysis. There are a few straightforward calculations which can be combined with a simple design flow to give a surefire result. The emitter lead is common to both input and output circuits and is grounded. The common emitter ampli er with bypassed emitter resistor 1 disclaimer i will discuss silicon based npntype bipolar transistors such as the ones used in the lab. Common collector amplifier basic electronics tutorials. Building a common emitter amplifier and im trying to achieve a voltage gain of 80 noninverted. The common collector amplifier is considered a voltagebuffer since the voltage gain is unity.
Introduction to using multisim for spice like circuit simulation. It is written such that no prior multisim knowledge is required. 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 impedance and low input impedance input is given at emitter via coupling capacitor. For the design of transistor amplifiers there is a new software available. Common emitter amplifer c amplifier multisim youtube. Single stage ce amplifier simulation on multisim youtube. Bjt common emitter amplifier with 100 gain on multisim duration. The difference in two amplifier designs shown above is the connection of emitter bypass capacitor c 3.
I have no resistor or capacitor values to derive from, but i do have a data spec sheet for the bjt and its characteristic curves. Multistage amplifier discrete semiconductor circuits. The capacitor and the 110k and 10k resistors bias the transistors base at about 1. The common collector amplifier can be thought of as a current amplifier. To work properly in an amplifier circuit a bipolar junction transistor bjt must be properly biased and operate in the active mode.
I need help with my common emitter amplifier circuit for my. Multisim tutorial using bipolar transistor circuit. Figure 72 illustrates two possible ce amplifier design. You start every design with the menu item new amplifier. Click new design1 click save as in desk top rename the design1 to your circuit name. Common base amplifier has a base terminal as common for both input and output. All evaluation software is the multisim professional edition. Design steps and consideration are discussed in the next common emitter amplifier, socalled, swamped common emitter amplifier. Students will investigate the frequency response of two amplifier circuits, one made with transistors and the. I would gladly appreciate any help or a kick in the right direction. Ecet220 laboratory 2 analysis of bjt amplifier cla. Configuring a temperature sweep analysis in multisim. Common emitter configuration commonly used in lownoise amplifiers. Single stage ce amplifier simulation on ni multisim simulation software.
In this lab, students will design an electrocardiogram ecg circuit using multisim live, and then build and validate the circuit to produce the most accurate possible heartbeat reading. In this multisim exercise, you will simulate a com. The computer simulation can be performed with different versions of electronicworkbench or other software packages, it is easier to use electronic workbench,version 5 or latest version multisim 2001 and use the bode plotter to measure the db gain. The common collector amplifier is another type of bipolar junction transistor, bjt configuration where the input signal is applied to the base terminal and the output signal taken from the emitter terminal. Use the common emitter bjt amplifier wizard to design common emitter amplifier circuits. I need help with my common emitter amplifier circuit for my assignment please. Amplifier is a electronic circuit which is used to amplify i. I need help with my common emitter amplifier circuit for. It has a medium input impedance and a medium output impedance.
Transistoramp bjt transistor amplifier circuits designer software. The electron design automation software multisim is used to develop a virtual. In the pull down menu you choose your desired circuit. This is a quick tutorial for teaching students of elec 2210 how to use multisim for bipolar transistor circuit simulation. This bypass capacitor makes a huge difference in ac gain and input impedance of the ce amplifiers as shown in the formula below. Pcb design practicalcommon emitter amplifier circuit. You can choose between common base circuit, common emitter circuit and common collector circuit. The resulting circuit can then be verified by spice simulation directly. Commonemitter ce circuits are the basic and important amplifiers. Figure 1 cascaded common emitter swamped amplifier ewb version 5 voltage gain calculations. The best circuit is to use a complementary symmetry or a push pull type of amp. Commonemitter ce circuits are the basic and important amplifiers in analog electronics. Students will consider the noise and bias a heart beat signal is subject to when measured with common.
The voltage signal applied at the input will be duplicated at the output. When this happens the emitter is not able to acquire a 0v potential, and the bjt is unable to turn on with a regular 0. This type of configuration is called common collector, cc because the collector terminal is effectively. Could you clarify what software you are speaking about. The common emitter amplifier is widely used and it is a very easy circuit to design. It is called a common emitter amplifier since the emitter is common to both the input circuti and the output circuit.
Now, in an emitter follower transistor configuration as shown below, the load is connected at the emitter side of the transistor, that is between the emitter and the ground rail. There are additionally three capacitors but they do not play a role in the basic transistor amplifier design which mainly involves setting dc voltages. Theoretical analysis of the ce circuit is carried out to calculate the qpoint, the voltage gain, the input impedance and the output impedance. Simulation and analysis of the commonemitter circuit in. To draw the frequency response curve of ce amplifier. Complete the following steps to design a common emitter amplifier using the common emitter bjt amplifier wizard. The design specified a voltage gain of 50 be obtained, a lower cut off frequency of 100hz and maximum symmetrical swing. Pcb design practicalcommon emitter amplifier circuit 1. 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 impedance and low input impedance input is given at emitter. To analyze a bjt amplifier classes amplifier comprising of two capacitors c and resistors r and measure voltage drops and currents at different locations.
This is not the only way in which a transistor may be used as an amplifier, as we will see in later sections of this chapter. The transconductance, g m, of the transistor is a function of the collector current i c and the so called thermal voltage, ktq which can be approximated by around 25 mv or 26 mv at room temperature. In this multisim exercise, you will simulate a common emitter ce amplifier using an npn transistor. Design your own bipolar transistor amplifier quick and.
Design and create pcb layout for common emitter amplifier using multisim software version 12. The lab preparation using multisim simulation tool must be completed before coming to the. It is quite easy to adopt preferred component values in the common emitter amplifier design. The baseemitter junction acts like a diode, so that the emitter will be a diode drop lower than the base. Thus the collector terminal is common to both the input and output circuits. Multisim is a circuit simulation tool built for educators to teach analog, digital, and power electronics by connecting simulation to experimentation. The ce amplifier provides high gain and wide frequency response.
The common emitter amplifier is one of the most common transistor amplifier configurations. To design a common base amplifier using multisim slideshare. Ecen 326 lab 1 design of a commonemitter bjt ampli. This article discusses the working of the common emitter amplifier circuit and its applications. Input is applied to the base emitter junction and output is taken from basecollector junction.
It is called the common emitter configuration because ignoring the power supply battery both the signal source and the load share the emitter lead as a common connection point shown in the figure below. Cascaded common emitter swamped amplifier experiment tiij. How to draw ce amplifier circuit using multisim software youtube. The common base amplifier provides a high voltage gain and unity current gain and it has low input impendence and high output impendence. By reading the above information you have got an idea about this concept. Go to component tool bar and select the components. This circuit offers the highest power gain of the three basic transistor amplifier circuits.
Here the idea is to add some bypassed emitter resistance for stable biasing with. A common base amplifier is such an amplifier which has the following charecteristics. Ecet220 laboratory 2 analysis of bjt amplifier classes of operation using simulation and actual construction i. Problems and explorations in microelectronics with ni. Problems and explorations in microelectronics with ni mydaq and multisim. The common collector and common emitter amp are not very energy efficient. Common emitter amplifiers are also used in radio frequency transceiver circuits. International conference on computer science and software engineering.
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