Видео

hii

sir can you share pdf of the slides so that we can have notes in dvance while studying on youtube . to save time

Super...😊

great

Thanx sir❤

Clear explanation of operating characteristics.

thats the difference between an iitb proff and a lower iit like iitp proff , he justs messes up the concepts and you made it crystal clear

are they lectures for ece

At steady state, a capacitor connected to a DC source in a closed circuit doesn't consume any current? How is that?

7:40 non inverting and inverting Schmitt trigger.

This is cool ! Amazing way to think about it.

really very helpful

Thank you for wonderful lectures. These are really helpful for beginners.

omg, never encountered such a fine knowledge

Sir sometime you write R on top, sometimes S on top. Which one is accurate.

Thank You Sir 😊😊😊😊😊

ruclips.net/video/agyejXt1ogc/видео.html

ruclips.net/video/agyejXt1ogc/видео.html

1 march 2023

Video not having clarity

Why not just do away with RE2, what is even the point of it?

we use terms Ri, and Ro and want to minimize that. However, we are also talking about AC signal as vs. Then why not say Zi and Zo i.e input and output impedance instead?

The topic of RE which is the emitter resistor has not been explained so far.

It was better to have the |Z| and Gain on the same plot or alteast make them have the same horizontal width.

Where is the topic of input/output impedance covered in this course?

So far, the teacher has not describe the purpose of emitter resistor in the BJT amplifier. I am not sure if/when this is covered. Also, when is the frequency response of input and output portion covered? The coupling capacitor and the transistor itself, imposes a frequency response.

Is there ANY video where all the things in the schematic at 08:32 are explained? I can see current mirrors, differential amplifier, push pull, common emitter amplifier and others. But making sense of the whole thing is not possible at all!

This lecture was not as good as the other ones, should have split this into two.

what does "transistor action" mean?

poor explanation. Had to read wikipedia

😊

29:10

14:42

Brilliant, sir.

This is what I really want.. 😇

hard to digest actually.... too many new terms left unexplained

why you've shown the sinusoidal representation of iC when it is exponential.

Good

Clamper and peak detector circuit combines to form Voltage doubler circuit.

Zener diode

Introducing capacitors in circuit and then discussed about Clampers.

Discussion of I-V characteristics of Diode and a model which is Shockley model.

This lecture is about implementation of logic circuits with multiplexers.

thanks for the lecture

Differential-mode and common-mode signals are important to understand in the design of complex signal-conditioning circuits which use operational amplifiers in medical diagnostic, industrial control and military applications. Operational amplifiers mainly excel in performance to provide a high common-mode rejection ratio and high gain. By using negative feedback, its overall gain, input impedance and bandwidth are determined by external components without these parameters being affected by the op-amp’s parameter variations due to external influences like temperature and so on. Most amplifiers built using discrete transistors will not be able to match the performance characteristics of an operational amplifier like CMRR, low drift, high input impedance and stability of gain. Engineers are so used to thinking and visualising currents as differential-mode in circuit analysis that they find it hard to switch their thinking to common-mode currents and their effects in say, amplifying circuits. It will be instructive to understand and visualise Current at its most fundamental level in the presence of electric fields in ordinary conductors. Electrostatics and circuits belong to one science not two. To learn the operation of circuits, Current and the conduction process, resistors and how discussing these topics makes it easier to understand the operation of capacitors, inductors, diodes and their operation in amplifier circuits and circuit theory watch these two videos i. ruclips.net/video/TTtt28b1dYo/видео.html and ii. ruclips.net/video/8BQM_xw2Rfo/видео.html Most common-mode signals originate because of sources external to the system, and the energy in them circulates annoyingly until it is dissipated in resistive portions. They can be generated internally if proper cables are not used for coupling signals at the frequencies of the signals they carry. Therefore the need arises for amplifiers to amplify only the useful differential signal and reject the common-mode component which does not belong to the signal conditioning system. Such an amplifier is used as the first stage of an operational amplifier which opens the door to allow a signal from a sensor ‘in’, so to say and so the importance given to this stage. Topics related to these aspects are discussed in chapters 3 and 5 of textbook 4 (see last frame References in video #1) and a power point presentation with animations “Basic Action of a Differential Amplifer-Heart of the Opamp” which explains differential amplifier with a U-tube manometer analogy of differential- and common- mode signals is included in the CD alongwith this book. Also in textbook 4 you will find descriptions using a unified approach towards an intuitive understanding of "circuit zero", "neutral", "ground" and "earth".

RC circuit time domain “The voltage across a capacitor cannot change instantaneously” is a statement one finds often in textbooks on circuit theory which discuss the application of a step voltage to an RC circuit. Most students memorise and apply this in circuits without understanding the physical processes involved. It will be useful to learn the operation of charging a capacitor using a unified approach to electrostatics and circuits. Electrostatics and circuits belong to one science not two. To learn the operation of circuits it is instructive to understand Current, the conduction process, resistors and Voltage at the fundamental level as in the following two videos: i. ruclips.net/video/TTtt28b1dYo/видео.html and ii. ruclips.net/video/8BQM_xw2Rfo/видео.html It is not possible in this post to discuss the charging of an uncharged capacitor. During the first few nanoseconds after switch ON, while the surface charges arrange themselves, there is no electric field E_cap and fringe field because there is no initial charge on its plates; it is as though the capacitor was not there - as though there were a continuous wire with no break in it. The last frame References in video #1 lists two textbooks 3 and 4 which discuss in detail with a series of diagrams (sequentially arranged) the physical processes in charging a capacitor. RL circuit time domain When a magnetic field inside a solenoid varies with time, a curly non-coulomb electric field is observed both inside and outside the solenoid. A coulomb electric field results and we note that an attempt to change the current in the coil induces an emf in the same coil and makes the coil sluggish to respond to current changes. It is not possible in this post to discuss the production of induced emfs in inductors in detail. The last frame References in video #1 lists two textbooks 3 and 4 which discuss in detail with a series of sequential diagrams the physical processes to explain the operation of inductors and RL circuits.

Why should a capacitor discharge? Imagine the capacitor with all its charges is kept inside a bag and tied at two open ends (open-circuit). The positive charges on one plate are attracted strongly to the electrons on the other plate, and the electric field is strong and uniform between the opposite charges on the plates. The opposite charges on either plate seem to hold each other tightly. The field is not so strong to cause the electrons to cross the gap and reunite with the positive charges. There is a fringe field at both ends ready to burst the bag, but the open circuit does not allow charge flow in the external circuit. The electric fields of surface charges which move onto the wires from both the plates and the fringe field will, during the initial transient when the wires are attached to the plates, combine to make the resultant electric field in the wires, zero. The fringe field is different from the field between the capacitor plates. When the charged capacitor is short-circuited using a wire, the effect is to open the tied ends of the bag and the charges are released. The fringe field causes the initial crucial release of charges for further flow of the charges….and development of surface charges that will enable the charges to flow around the wire, and neutralize each other. After all the charges on the plates are neutralized, the circuit attains a state of static equilibrium, a natural relaxed state of equilibrium and we say the capacitor is discharged. Electrostatics and circuits belong to one science not two. To learn how a capacitor charges and discharges and the origin and role of the fringe field in the circuit process it is instructive to understand Current, the conduction process and Voltage at the fundamental level as in the following two videos: i. ruclips.net/video/TTtt28b1dYo/видео.html and ii. ruclips.net/video/8BQM_xw2Rfo/видео.html It is not possible in this post to discuss in more detail the formation of the fringe field when a capacitor is charged and discharged. The last frame References in video #1 lists textbooks 3 and 4 which discuss these topics in more detail using a unified approach and provide an intuitive understanding of discharging a capacitor with the help of sequential diagrams.

How do RC and RL filters function? How do capacitors and inductors drop ac voltages in filters? To understand this intuitively it is useful to know what is a fringe field of capacitors and what its effect is at different frequencies. With inductors, it is useful to know the induced field and its effects at different frequencies. These effects influence the net field and current magnitudes in capacitors snd inductors. Knowing this will help in understanding the operation of RL and RC circuits as filters. Attenuation, it should be understood, denotes a decrease of the amplitude, or magnitude of coherent or incoherent electromagnetic waves or electrical impulses without specifying what quantity should be used to measure the decrease, whether the decrease should be space-dependent, time-dependent or both, the cause of the decrease or, the conditions under which the decrease is to be measured. A resistor can produce attenuation but it need not be there always to produce attenuation. Lossless lines and T-section and m-derived section filters can attenuate signals as well. Electrostatics and circuits belong to one science not two. To learn the operation of circuits, Current and the conduction process, resistors, capacitors and inductors and how discussing these topics with a unified approach makes it easier to understand phase-shifting in capacitive and inductive circuits, watch these two videos i. ruclips.net/video/TTtt28b1dYo/видео.html and ii. ruclips.net/video/8BQM_xw2Rfo/видео.html The last frame References in video #1 lists two textbooks 3 and 4 with topics that discuss the operation of capacitors and inductors. Textbook 4 in addition includes discussions on phase-shifting with a unified approach to electrostatics and circuits useful to understand how filters function.

The coupling of ac signals to inputs of transistors (an ac signal rides on a dc voltage) and generation of an ac equivalent circuit to analyze transistor amplifiers is one of the classic applications of the principle of superposition of potential. Electrostatics and circuits belong to one science not two. To learn the operation of circuits, Current and the conduction process, resistors and how discussing these topics makes it easier to understand the principle of superposition of potential which is a direct consequence of the principle of superposition applied to electric fields, watch these two videos i. ruclips.net/video/TTtt28b1dYo/видео.html and ii. ruclips.net/video/8BQM_xw2Rfo/видео.html The last frame contains references in video #1 which lists two textbooks 3 and 4 with topics that discuss the operation of capacitors, inductors, diodes and their operation in amplifier circuits and circuit theory. Chapter 3 in textbook 4 was included with the aim of preparing students to be able to analyze amplifier circuits in more advanced courses in electronics. It begins with a description in detail wigh sequential diagrams of how ac signals are coupled using a capacitor to the input of amplifiers. Stray capacitance effects limit amplifier high frequency performance, and a description that uses the principle of superposition to explain this is provided in one section of chapter 3 of textbook 4. The voltage-shunt feedback method finds an important application in a wide class of linear integrated circuits, the operational amplifier, and in a continuing vein of the principle of superposition, the final section of chapter 3, textbook 4 describes this method.The results of simulation runs of circuits that superimpose ac signals on dc voltages “Simulation_super_ac_sig_on_dc_volt.pdf” and of CR phase-shifting networks typically used in RC Phase shift oscillators “RC phase shifters.pdf” are included in pdf files in the CD which is included with textbook 4. Procedures to obtain the voltages, currents and waveforms for this using TINA simulation software (freely downloadable) are also provided in the CD.

Everything covered thank you very much sir 😊