Laboratory manual hirasugar institute of technology. The gate electrode voltage is used to control drainsource characteristics. Transistor characteristics modern lab experiments documentation. Non ideal characteristics of differential amplifier. To plot and study the input and output characteristics of bjt in common emitter configuration. Overview in this lab, we will study the iv characteristics of an nchannel jfet to calculate a few equivalentcircuit parameters in order to make a smallsignal model of the jfet. This laboratory course enables students to get practical experience in design, assembly, testing and evaluation of rectifiers and voltage regulators. The base voltage v be is varied from zero by adjusting the rheostat rh 1.
To perform measurements on your devices, and determine spice simulation parameters. To study the input and output characteristics curves of the given npn transistor and hence to determine the amplification factor. It is the region to the left end which supply free charge carriers i. Keeping the collector emitter v ce voltage constant, the base emitter v be voltage is increased from 0 and the corresponding base current i b values are noted. A power mosfet is a special type of metal oxide semiconductor. Whenever large amplification with very good impedance matching is required using an active device such as a transistor or a field effect transistor a single active device and its associated circuitry will not be able to cater to the needs. Design the circuit shown in figures 1 and 2 by calculating the values of r 1, r 2, r 3 and r 4. Electronic circuits ii bapatla engineering college, bapatla.
This lab will guide you in the process of designing cmos circuits using both user defined, transistor. A graph is drawn with v be along xaxis and i b along yaxis. Background bipolar junction transistors bjts are three terminal devices that make up one of the fundamental building blocks of the silicon transistor technology. Analyse the switching and conduction losses in power mosfets. In this design the bias voltage between emitter and collector should be 5v dc. Page 511 field effect transistor lab manual lab ix. Figure 1 shows a pnp transistor connected in common base cb configuration. To study the input and output characteristics of a transistor in common emitter configuration. Do not tamper with or remove security straps, locks, or other security devices.
To obtain the iv characteristics of both p type and n type devices. To develop handson skills and knowledge about the electronic equipment such as oscilloscopes, function generators, multimeter, timers etc. Bipolar junction transistor characteristics bjt lab 8. Bipolar junction transistor characteristics page 1. Eca lab manual dept of ece, lendi institute of engineering and technology page 4 theory. Choose an appropriate scale for i c and label each i b curve. The rheostat rh 1 is used to vary base voltage input voltage v be and it is read from voltmeter v 1. The device has only one junction, so it is called the unijunction device. Using infrared led and photo diode, and transistor, we can make a photo transistor. Transistor characteristics theory amrita online lab.
Should take only the lab manual, calculator if needed and a pen or pencil to the work area. Draw a circuit for measurements of characteristics of a depletion mode, nchannel jfet, described in part 1 of the laboratory below. Sri bhagawan mahaveer jain college of engineering engineering physics laboratory manual page 7 2. The device, because of one pn junction, is quite similar to a diode but it differs from an ordinary diode as it has three terminals. The following is a list, by letter symbol, of the major electrical characteristics for the rectifier and signal. The collector voltage vce is determined in the above experiment directly with a meter. To study the common emitter input and output iv characteristics of the given transistor and hence to determine the knee voltage and the transistor parameters. You can check out and keep the portable breadboards, vb106 or vb108, from the 111 lab for yourself only one each please in this lab you will explore basic jfet characteristics, circuits and. Ece department of electronics and communication cs302 lab manual page 3 of 4 the basic diode symbol and static vi characteristics. Nov 25, 20 equipment external multimeter for current measurements regulated power supply 2n3904 resistors introduction the objective of this lab is to analyze the characteristics of transistor. The circuit diagram for npn transistor is shown below. The letter n following the first number indicates a semiconductor. A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power.
Different configurations of bjt amplifier are discussed in this part of the book. To study the characteristics of transistor in common base configuration. Multisim tutorial using bipolar transistor circuit. The design should provide maximum possible voltage swing at the amplifier output. Characteristics of uni junction transistor digital experiments 12 6. Transistor construction techniques the most common type of junction transistor is the pnp diffused alloyed type. Basic electronics lab manual school of physical sciences national institute of science education and research. Metal oxide semiconductor field effect transistors mosfets.
These majority carriers are injected to the middle region i. Any twoport network which is analogous to transistor configuration circuits can be analyzed using three types of characteristic curves. Eemsd lab ec317f lab manual iii sem ecs page2 list of experiments s. Each and every practical provides a great in depth practical concepts of bjt. From theory, we know that field effect transistors are voltage controlled unlike from bjts, which are current controlled devices. Input characteristics the collector voltage vce is kept constant eg. This manual is your guide to the first electronics laboratory in the electrical. Familiarize with the construction and operation of photo transistors.
We have assembled a computer driven system for automatic measurements of these quantities. Applications of jfet as a current source and a variable resistor. They are called active devices since transistors are capable of amplifying or making larger signals. Your lab grade will be affected if your laboratory station is not tidy when you leave. Three terminals are emitter e, collector c and base b are shown in figure 1. Analyse the difference regions in characteristics curve of power mosfets. To study input and output characteristics of a npn bipolar junction. It is composed of semiconductor material with at least three terminals for connection to an external circuit. To study the input and output characteristics of an npn transistor in common. Curve tracer manual physics 111 lab library reference site. This experiment involves measurement of currentvoltage characteristics output characteristics.
Transistor cb characteristics input and output po1, po5, po 12 pso1, pso2 6 transistor ce characteristics input and output po1, po5, po 12. Opto electronics ee471 lab manual 9 laboratory exercise 04 objective. Do not move instruments from one lab station to another lab station. Field effect transistor lab manual field effect transistor lab manual lab 1. Familiar with characteristics of mosfet such as gain, speed, power. Typical output characteristics are shown in figure 2. Digilent eeboard adjustable power supply as illustrated in fig. Explain common emitter characteristics of a bjt structure of bipolar junction transistor a bipolar junction transistor, bjt, is a single piece of silicon with two backtoback pn junctions. In a typical amplifier circuit, voltages are supplied so that the emitterbase junction is forwardbiased and the collectorbase junction is reversebiased. In laboratory the breakdown will not tested because it will damages the diode permanently. Engineering 162 laboratory manual spring 2004 5 several of the lab exercises, particularly labs 4, 5 and 7 require measurements of the gain and phase shift of amplifiers as functions of frequency. Design equations using a mosfet for the saturating switch can be found in textbooks. University property must not be taken from the laboratory.
Lab 3 bipolar junction transistor characteristics section a. Characteristic curves of transistor in common base configuration. This transistor is made by taking a wafer of n type germanium, mounting it on a holder and pressing indium dots into each side. It finds application in virtually all electronic devices from radios to computers. This voltage, vr is called the cutin voltage or threshold voltage of diode. We would like to show you a description here but the site wont allow us. Transistor characteristics in physics, the graph representing the relationships between the current and the voltage of any transistor of any configuration is called transistor characteristics. In modern power electronics, the mosfet is very widely used for pwm applications. After performing procedure 4 from the lab manual, you may analyze your data with the assistance of a data analysis routine built into the vi. This routine allows you to to determine the forward current injection ratio a and the output resistance r o of your transistor.
Implementation of transistor differential amplifier. Integrated circuits typically contain millions of transistors, formed on a single tiny chip of silicon. Reprints and other information can be found on the physics 111 library site. A transistor is a three terminal device which allows a small current to control a much larger current, thus achieving a current gain. In this lab, we are to obtain the results in order to prove above said. Base is the terminal common to the input side and the output side and this terminal has been grounded. Thanks to david epting who has tracked and corrected the errors in version 1. These courses use the gpdk090 library for a 90nm technology. Analog electronics laboratory manual 10esl37 dept of ece gcem page iii course objectives. Thanks to janet bean for preparing the 2005 version 1. In the report, include a labeled printout of the characteristics.
The 2 or 3digit number following the letter n is a serialized identification number. From the characteristics curve it can be seen that, a particular forward bias voltage vr is required to reach the region of upward swing. Transistor characteristics procedure amrita online lab. Two of the basic uses of a transistor, which will be explored in this experiment, are as an amplifier and as a switch. In principle and in practice the emitter and collector of a bipolar transistor can be in. Jun 19, 2020 nov 25, 20 a transistor is a three playboy of the western world summary analysis terminal device which allows a small current to control a much larger current, thus achieving a current gain. Theory a photo transistor can be made to respond to light. Familiarity with basic characteristics and parameters of the jfet. Input and output characteristic curves of cb transistor. Transistor, variable dc power supply, microammeter, milliammeter, voltmeter. Sinusoidal oscillators a w ein bridge oscillator b ph ase shift oscillator. Srinivasa rao lecturer in ece department of electronics and communication engineering bapatla engineering college, bapatla.
Experiment 6, photodiode and phototransistor current. Pierce as a portmanteau of the term transfer resistor. Plot i c versus v ce for the various values of i b. Using the test circuit of figure 2, adjust v b to generate 50 a current into the base of the transistor. Field effect transistor characteristics using any simulation software 29 32 9 scr characteristics using any simulation software 33 36 10. Emitter is a heavily doped region to supply a large number of majority carriers into the base. Transistor characteristics lab introduction transistors are the active component in various devices like amplifiers and oscillators. You will then compare the experimental results with the theoretical results of the equations found in the lab manual. Vi characteristics of pn junction diode in forward bias. Edit the file to update the nmos model parameters kp and vto in the.
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