Operational amplifier or opamp is a multistage amplifier that is used for general electrical signal manipulationgeneral electrical signal manipulation. Opamps provide new functionality to circuits, introduce dependent sources, and allow modularity and abstraction in our circuit designs and diagrams. An opamp has a very high gain typically order of 10 5. Handbook of operational amplifier applications bruce carter and thomas r. Vajpeyi department of physics, indian institute of technology guwahati, india 1. Using r k 2n 1 r2k, we get i v r 2n 1r nx1 0 s k 2 k n 4 here. They generally use some form of active devices like transistors or opamps as amplifiers with feedback network consisting of passive devices such as resistors, capacitors, or inductors. The operational amplifier opamp is a key building block in analog integrated circuit design. Semiconductor materials, rectifier circuits, clipping and clamping circuits, bjt, mosfet, jfet, bjt small signal analysis, bipolar junction transistor amplifier, small signal model of mosfet, junction field effect transistor, operational amplifier op amp, op amp applications, large signal amplifiers, positive feedback and oscillation, silicon control rectifier and scr applications. Infinite input impedance n input impedance is the ratio of input voltage to. Feb 17, 2015 now, i will explain how to auto download nptel audio lectures mp3, subtitles srt of the video lectures. Eggn 281 lecture introduction to operational amplifiers op amps taught by dr.
Lecture 29 operational amplifier frequency response reading. Nptel video lectures, iit video lectures online, nptel youtube lectures, free. Operational amplifiers tlt8016 basic analog circuits 20052006 4 2. Handbook of operational amplifier applications rev. The audio lectures mp3, pdf lectures, subtitles srt can be downloaded from here. Basic opamp op amp is a circuit that has two inputs and one output. Op amp pdf nptel op amp pdf nptel op amp pdf nptel download.
It is a highgain electronic voltage amplifier with a differential input and usually a singleended output. Video lectures circuits and electronics electrical. Internal circuitry of an op amp can be found in its data sheet. Output current and voltage characteristics of the pushpull, inverting amplifier rl 1k. Alan doolittle lecture 24 mosfet basics understanding with no math reading. Astable multivibrators charging c 2t 2 r 4c2 discharging c 1t1 r 2c1 5 since q1 conducts and q2 off hence vc1 0v and vc2 v cc. Opamp analysis is significantly easier than transistor analysis.
Chitralekha mahanta nptel online videos, courses iit video lectures. The output voltage is v o r f i v r r f 2n 1r nx 1 0 s k 2 k. Modern op amps owe their existence to edisons light bulb. Lecture series on electronics for analog signal processing partii by prof. In this session, we will cover operational amplifiers opamps. How to download all of the lectures for a course in nptel. Opamps enable us to sample a voltage from a particular subsection of a circuit without disrupting the properties of the circuit in that subsection. This is based on the assumptions that is in the range between the positive and negative voltage supplies e. T b ao db if the open loop bandwidth is so small, how can the op amp be useful. There is no such thing as an ideal op amp, but present day op amps come so close to ideal that ideal op amp analysis becomes close to actual analysis. Basic electronics online course video lectures by iit guwahati. Ravel ammerman, colorado school of mines recorded february 6, 20. Decide whether the feedback in the circuit is positive or negative and determine the voltage v at the output of the opamp.
How to download all of the lectures for a course in nptel quora. Nptel electrical engineering video lecture online study. Lecture 1 introduction to integrated circuits ic technology lecture 2 introduction. In its classic form it consists of two input terminals, one of which inverts the phase of the signal, the other preserves the phase, and an output terminal. Lecture 1 introduction to basic electronics youtube in the analog part diode circuits bjt amplifiers op amp circuits will be covered. Lecture 7 operational amplifier in negative feedback. This ignores the power supply terminals, which are obviously. Mod01 lec02 transistor op amp and transistor based voltage regulator. Radhakrishna rao, department of electrical engineering,iit madras. Wien bridge oscillator introduction oscillators are circuits that produce periodic waveforms without any input signal. In the circuit shown below, the opamp is ideal, the transistor has v be 0.
The name ideal op amp is applied to this and similar analysis because the salient parameters of the op amp are assumed to be perfect. Nptel analog electronics nptel video lectures from iits. The operational amplifier is a directcoupled high gain amplifier usable from 0 to over 1mh z to which feedback is added to control its overall response. Design and development of temperature controlled circuit using opamp as onoff, proportional and proportionalintegral. Basic two stage cmos op amp this is a common workhorse opamp for medium performance applications provides a nice starting point to discuss various cmos opamp design issues starting assumptions. The answer to this is found by considering the closed loop gain. Pavan 2010, keller 2008, cherry 1999, benabes 1997. Electronics and communication engineering circuits for analog system design jun 2, 2019 0619 by national programme on technology enhanced learning. Project 2 extension now due on mar 17, 2014 at beginning of class 1pm. Operational amplifiers op amps harvey mudd college. Download nptel audio lectures mp3 and subtitles srt. Operational amplifier, difference amplifiers, biasing of differential amplifiers, practical operational amplifier, parameters of an opamp, open loop opamp configuration, closed loop amplifier, voltage shunt feedback, opamp applications, oscillator, harmonic oscillators, tuned oscillators, voltage regulators, design of series. An operational amplifier or opamp is a voltage amplifying device designed to be used with external feedback components such as resistors and capacitors between its output and input terminals. Analysis of opamp circuits the full analysis of the opamp circuits as shown in the three examples above may not be necessary if only the voltage gain is of interest.
The standard symbol for the op amp is given in figure 1. Real op amp frequency response 2 1 mhz 2 5 hz 200,000 106 for the 741 op amp. Nptel, online courses and certification, learn for free. Learn for free, pay a small fee for exam and get a certificate. Design of a miller compensated opamp from specification video pdf. Ahmad elbanna faculty of engineering department of electronics and communications 15 gee336 electronic circuits ii. I looked and looked at the notes, and i even looked at the book, but i cant seem to find the right equation for this configuration. Op amps characteristics part 3 negative feedback op. Nptel, iit, lectures, courses, video, engineering, online. Op amp applications op amps and op amp circuits video. Lecture 29 operational amplifier frequency response. Eggn 281 lecture introduction to operational amplifiers opamps taught by dr. Module 4 lecture 1 operational amplifier introduction youtube. In todays lecture we continue with the operational amplifier, op amp for short and what we are going to do is just build up a bunch of fun.
Nptel video lectures iit video lectures online nptel youtube lectures free video lectures nptel online courses youtube iit videos nptel courses. Negative feedback is the return of a portion of the output signal to the input signal outofphase when an op amp has feedback, its operation is closed loop. Opamp are no vo exception so we define the ideal opamp as an ideal voltage amplifier with infinite open loop gain. Since the inverting terminal of the op amp is at virtual ground, i k va k 0 r k s k v r r k. Op amps are used in a wide variety of applications in electronics.
Compare hand calculations of dc analyses with pspice simulations outline 741 circuit topology and. Nptel electronics free video lectures, courses, tutorials, classes, clips electronics lectures from mit, stanford electronics video classes from iit delhi, mumbai, kharagpur, kanpur, chennai etc. But we needed a few inventions before we had an op amp. May 12, 2009 lecture series on basic electronics by dr. Thats because the right equation for this circuit does not existat least. Identify the devices, circuits, and stages in the 741 operational amplifier 2. However, the lecture notes, demos, and videos presented in this section are taken from the fall 2000 version. Positive vo vn vp ip in io vee vo vp vn vcc vee inverting input. Lecture 1 electric drive lecture series on power electronics by prof. Ghlm 454462 objective the objective of this presentation is to. Op amp golden rules memorize these rules 1 the op amp has infinite openloop gain.
Semiconductor materials, rectifier circuits, clipping and clamping circuits, bjt, mosfet, jfet, bjt small signal analysis, bipolar junction transistor amplifier, small signal model of mosfet, junction field effect transistor, operational amplifier opamp, opamp applications, large signal amplifiers, positive feedback and oscillation, silicon control rectifier and scr applications. Intelligent sensor systems ricardo gutierrezosuna wright state university 4 ideal opamp properties g property no. Differential amplifier with current mirror load video pdf. The operational amplifier is a directcoupled high gain amplifier usable from 0 to over 1mh z to which. So, you want to download all of the video lectures for a course in nptel. Op amp operation introduction the op amp is one of the basic building blocks of linear design. Infinite openloop gain n openloop gain avol is the gain of the opamp without positive or negative feedback n in the ideal opamp avol is infinite g typical values range from 20,000 to 200,000 in real devices g property no. The symbol of the opamp with the associated terminals and ports is shown on figure 1a and b. Advanced electric drives online course video lectures by iit. The larger input impedances are found on op amps with fet input stages like the tl081.
Infinite openloop gain n openloop gain avol is the gain of the op amp without positive or negative feedback n in the ideal op amp avol is infinite g typical values range from 20,000 to 200,000 in real devices g property no. Inverting and noninverting amplifiers and their analysis. Op amp terminals and voltages feedback comparator circuits ideal op amp. Were in chapter 11 and well be looking at the subjection of operational amplifiers and circuits and theyre commonly referred to as op amps for short. To amplify the difference between the input signals, the op amp draws power from an electrical power supply. Chapter iiia the operational amplifier and applications. Chitralekha mahanta, department of electronics and communication engineering,iit guwahati.
The op amp is one of the basic building blocks of linear design. Nptel electronics free video lectures, courses, tutorials, classes, clips electronics lectures from mit, stanford. Feb 14, 20 eggn 281 lecture introduction to operational amplifiers op amps taught by dr. Ideal opamp circuits are analyzed by the following steps. In todays lecture we continue with the operational amplifier, op amp for short and what we are going to do is just build up a bunch of fun building blocks using the op amp. Nptel provides elearning through online web and video courses various streams. The numbers of applications possible with opamps are two numerous to list.
Circuits for analog system design nptel online videos. Video lectures created by tim feiegenbaum at north seattle community college. Similar equations have been developed in other books, but the presentation here emphasizes material required for speedy op amp design. Lecture 24 mosfet basics understanding with no math. Example an op amp circuit analysis lecture ku ittc. When an op amp has feedback, its operation is closed loop. The text transcription of nptel video lectures is provided in the following website.
Lecture 7 operational amplifier in negative feedback youtube. Operational amplifiers introduction the operational amplifier opamp is a voltage controlled voltage source with very high gain. Module 4 lecture 1 operational amplifier introduction. If the signal applied to the input terminal, results in opposite polarity output then input terminal is called inverting input, and if output is of same polarity input.