Search results “Current gain bandwidth product”

In this video, the frequency response and the gain bandwidth product of an op-amp have been discussed.
Gain bandwidth product is a very important parameter of the op-amp. And it is quite often used for selecting specific op-amp for the particular application.
Frequency Response of the op-amp:
In open loop configuration, the gain of the op-amp is not constant and varies with the frequency. The gain of the op-amp remains constant up to the certain frequency and beyond that, it reduces at the constant rate of -20 dB/dec.
In open loop configuration, the bandwidth of the op-amp used to be very low (Few Hertz), because most of the today's op-amps are internally compensated. (By using the internal compensation capacitor)
This internal compensation ensures the stability of the op-amp output at high frequency when op-amp is used in the feedback configuration.
And second, it ensures that op-amp has a single cut-off frequency at till its gain reaches the unity gain.
Gain Bandwidth Product of Op-amp:
Because of the internal compensation, it is easy to identify the frequency of the operation if we know the gain of the op-amp. Or it is easy to understand the behavior of the op-amp with frequency.
And the product of gain and frequency remains constant till the unity gain frequency for the op-amp, which is known as the gain bandwidth product of the op-amp.
Gain bandwidth product is very useful when op-amp is used in the closed loop configuration. Using this closed loop configuration, we can find the cut-off frequency of the op-amp using this gain-bandwidth product.
For any op-amp gain bandwidth product = Unity Gain Frequency.
The timestamps for the different topics covered in the video is given below:
0:33 Frequency Response of the Op-Amp
1:25 Role of Internal Compensation Capacitor in the Frequency Response of the Op-amp
2:58 Gain Bandwidth Product of Op-Amp
5:40 Gain Bandwidth Product of Non-Inverting and Inverting Op-Amp
This video will be helpful to all students in understanding the frequency response and the gain-bandwidth product of the op-amp.
The link to the related videos on the op-amp:
Introduction to Operational Amplifier:
https://www.youtube.com/watch?v=kiiA6WTCQn0
Inverting Op-Amp:
https://www.youtube.com/watch?v=AuZ00cQ0UrE
Non-Inverting Op-Amp:
https://www.youtube.com/watch?v=uyOfonR_rEw
Op-Amp Integrator
https://www.youtube.com/watch?v=OPvs7A554Rw
This video will be helpful to all students of science and engineering in understanding the working of op-amp differentiator.
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Views: 27478
ALL ABOUT ELECTRONICS

gain–bandwidth product for an amplifier is the product of the amplifier's bandwidth and the gain at which the bandwidth is measured.
Operational amplifiers that are designed to have a simple one-pole frequency response, the gain–bandwidth product is nearly independent of the gain at which it is measured; in such devices the gain–bandwidth product will also be equal to the unity-gain bandwidth of the amplifier.
For an amplifier in which negative feedback reduces the gain to below the open-loop gain, the gain–bandwidth product of the closed-loop amplifier will be approximately equal to that of the open-loop amplifier.

Views: 640
Electronics Physics and Spirituality

Relationship between gain and bandwidth in op-amp circuits. Definition of unity gain frequency and gain-bandwidth product.

Views: 1474
Mateo Aboy

Op amp gain-BW product and slew rate limiting are defined, discussed and demonstrated on the bench. This discussion applies to the majority of general purpose op amps on the market - as most op amps are internally compensated with a single dominant pole. High speed op amps, unconditionally stable op amps, non-unity gain stable op amps, high power opamps, etc. may not follow these characteristics because they are often compensated differently in their design. An LM358N is used for the example circuit. Other popular op amps like the LM741, etc. will behave in a similar way. Sometimes the slew rate limit of a device will be the dominant factor in determining the bandwidth, and other times the gain-bandwidth product will determine the resulting frequency response. The video demonstrates why this happens. Notes from the video are here:
http://www.qsl.net/w/w2aew//youtube/opamp_GBWP_SlewRate.pdf

Views: 41835
w2aew

Let's make sense of Open Loop Gain, frequency response and gain-bandwidth product

Views: 497
Mary West

What is Gain bandwidth product of operational amplifiers, Transistor Amplifier Circuits, Electronic Devices & Circuits.
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SimplyInfo

What is the importance of gain bandwidth product - Find out more explanation for : 'What is the importance of gain bandwidth product' only from this channel.
Information Source: google

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moibrad9b

Op-amp AC (frequency dependent) imperfections explained and derived: Gain Bandwidth Product (GBP, or unity gain frequency, or unity gain bandwidth) and open loop frequency dependent gain, op-amp slew rate, and full power bandwidth. Through derivation and example, the impact of GBP on an inverting and non-inverting op-amp circuit is demonstrated. The relationship between GBP, DC open loop gain, and open-loop pole frequency is shown. Additionally, the relationship of GBP, closed loop DC gain, and closed loop bandwidth is explained and demonstrated.

Views: 5941
Joel Gegner

Examples of gain-bandwidth calculations for non-inverting and inverting amplifiers.

Views: 514
Mateo Aboy

In this ElectronicBit Prof. Sam Ben-Yaakov demystifies the issue Gain Bandwidth Product of Current Feedback Amplifiers (CFA).
___________________
Prof. Shmuel (Sam) Ben-Yaakov
Mail: [email protected]
Power Electronics Laboratory: http://www.ee.bgu.ac.il/~pel

Views: 6057
Sam Ben-Yaakov

A simulation in Multisim using AC analysis + some background information on things like the decibel system, cut-off frequencies etc

Views: 4456
Paul Wesley Lewis

Views: 261
Nicholas Chan

Non-Ideal Operation Amplifiers' Characteristics Project for Singapore Polytechnic under Aircraft Servomechanisms and Electronics module.

Views: 58
Abdul Haleem

Views: 201
Kurt Schluchter

Op-Amp Limitations: AC Effect - Gain-Bandwidth Product. This tutorial explores the linear AC non-idealities of op-amps. Specifically, we look at finite bandwidth, and the concept of gain-bandwidth product.

Views: 904
Mateo Aboy

ANALOG ELECTRONICS-
Multistage amplifier - CASCADE amplifier explained.
Concepts like gain and bandwidth are very important for GATE exams.
Frequency curve explained about lower cutoff frequency and higher cutoff frequency.
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GATE lectures on SIGNAL AND SYSTEM - by Shrenik Jain
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Shrenik Jain

In this ElectronicBit Prof. Sam Ben-Yaakov shows how to derive by a simple graphical method the closed loop transfer function of OpAmp based amplifiers.
___________________________
Prof. Shmuel (Sam) Ben-Yaakov
Mail: [email protected]
Power Electronics Laboratory: http://www.ee.bgu.ac.il/~pel

Views: 10946
Sam Ben-Yaakov

The 300-MHz gain bandwidth product, OPA838 voltage feedback amp is well-suited for use as a low-power 12 to 14-bit SAR ADC driver or transimpedance amp.
http://www.ti.com/product/OPA838/description

Views: 446
Texas Instruments

Fundamentals Friday.
Dave explains Gain Bandwith Product and how it's possible to increase your system bandwidth by cascading opamps in series. Also, a discussion on the associated noise issues.
A breadboard example shows how variable GBWP can be, and how it can relate to distortion.
Opamp Noise Tutorial: http://www.youtube.com/watch?v=Y0jkPLuFdnM
Forum: http://www.eevblog.com/forum/blog/eevblog-572-cascading-opamps-for-increased-bandwidth/
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EEVblog

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Gavin Olson

In this video, the slew rate of an Op-Amp has been explained with solved examples.
What is Slew Rate:
It defines the maximum rate at which the output of the op-amp can change. (How fast the op-amp is able to respond)
Unit of Slew Rate: V/us
Different Op-Amp has different slew rate and the value of slew rate varies from 0.1 V/us to 1000 V/us.
So, depending on the application the op-amp with specific slew rate needs to be selected which prevents the distortion of the output signal.
Causes of Slew Rate in Op-Amp:
The internal compensation capacitor in the Op-Amp is the main cause of slew rate in every Op-Amp.
The value of Slew rate depends on the value of this internal compensation capacitor and the charging or driving current.
Power Bandwidth of the Op-Amp:
The maximum frequency (for large signals) up to which there will not be any distortion in the output is known as the Power bandwidth of an op-amp.
This power bandwidth of the op-amp (slew rate limited maximum frequency ) is defined for the large signal (in volts), while the unity gain-bandwidth product is defined for the small signals (in mV).
If the input frequency is more than this maximum frequency, then the output signal will start getting distorted. And this kind of distortion in output is known as the slew rate induced distortion.
The timestamps for the different topics covered in the video is given below:
0:19 What is Slew Rate of an Op-Amp?
2:31 Causes of Slew Rate in Op-Amp
4:12 Effect of Slew Rate on Pulse input
7:46 Effect of Slew Rate on Sinusoidal Signal
10:21 Example 1
11:30 Example 2
The link to the related videos on the op-amp:
Introduction to Operational Amplifier:
https://www.youtube.com/watch?v=kiiA6WTCQn0
Inverting Op-Amp:
https://www.youtube.com/watch?v=AuZ00cQ0UrE
Non-Inverting Op-Amp:
https://www.youtube.com/watch?v=uyOfonR_rEw
Op-Amp Integrator
https://www.youtube.com/watch?v=OPvs7A554Rw
Op-Amp Gain Bandwidth Product:
https://www.youtube.com/watch?v=wfkzz1rg-xk
This video will be helpful to all student of science and engineering in understanding the slew rate of the op-amp.
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ALL ABOUT ELECTRONICS

Views: 31
Josh Frisby

Op-amps are very common for amplifier and comparator circuit designs. This video tests common dual op-amp slew rate (response) at various frequencies and at a fixed gain. A square wave into the op-amp should output a similar square wave at an amplification multiple.
Setup (See Onstate video #147 for more information):
Signal: 210mVp-p square wave with 100mV DC offset and 1.0k series resistor to op-amp.
Op-amps 1: 10k/1.0k gain setup with 1.0k load to ground.
Oscilloscope top trace CH1: 0.1V/div. Input signal. Op-amp +pin. Top marker arrow is 0V.
Oscilloscope bottom trace CH2: 1.0V/div. Op-amp output signal. Bottom marker arrow is 0V.
Op-amp gain=~11
Power input: ~10V. DMM=frequency
Testing: Adjust input frequency until op-amp output decreases or distorts signal.
Output: CH1=0.21Vp-p +0.1V offset, CH2=2.3Vp-p +1.1V offset.
Slew rate: Slowest-Fastest. Fairchild LM258, On Semi LM258, TI LM358, TI TLC272, On Semi MC33072. For comparator or amplifying applications, a fast response op-amp is recommended. A slow op-amp may not pickup the input signal or output the required signal level.
Recommendation: Different response rates for different manufacturers. Important to read datasheet for proper use of op-amp.
Subscribe for technical support. Please read description and product datasheet before comments/questions.

Views: 217
Onstate LED Lighting

Dr.Shanthi Pavan obtained the B.Tech degree in Electronics and Communication Engg from the Indian Institute of Technology, Madras in 1995 and the M.S and Sc.D degrees from Columbia University, New York in 1997 and 1999 respectively. From 1997 to 2000, he was with Texas Instruments in Warren, New Jersey, where he worked on high speed analog filters and data converters. From 2000 to June 2002, he worked on microwave ICs for data communication at Bigbear Networks in Sunnyvale, California. Since July 2002, he has been with the Indian Institute of Technology-Madras, where he is now a Professor of Electrical Engineering. His research interests are in the areas of high speed analog circuit design and signal processing.
Dr.Pavan is the recipient of the IEEE Circuits and Systems Society Darlington Best Paper Award (2009), the Swarnajayanthi Fellowship (2010, from the Government of India) , the Young Faculty Recognition Award from IIT Madras (2009, for excellence in teaching) , the Technomentor Award from the India Semiconductor Association (2010) and the Young Engineer Award from the Indian National Academy of Engineering (2006). He is an Associate Editor of the IEEE Transactions on Circuits and Systems: Part I - Regular Papers, and earlier served on the editorial board of the IEEE Transactions on Circuits and Systems Part II - Express Briefs from 2006-2007.

Views: 4914
Satish Kashyap

LTSpice: AC Analysis, Finite Bandwith , Low-Pass Filters. This video shows a tutorial of LTSpice in Mac OS X. It covers how to conduct transient (time-domain) and AC (frequency-domain) analysis. It also illustrates the concepts of op-amp limitations (finite output current, finite bandwidth) and first order active-filters.

Views: 3894
Mateo Aboy

Visit http://ilectureonline.com for more math and science lectures!
In this video I will calculate the voltages of an open-loop gain vs a closed-loop gain.
Next video in this series can be seen at:
https://youtu.be/Gmy1ciTiEbs

Views: 28230
Michel van Biezen

http://allaboutee.com
How to derive the gain of a unity gain amplifier using two methods.

Views: 8335
AllAboutEE

Using the "virtual ground", we reexamine the inverting op-amp circuit and find a solution much quicker. We apply the virtual ground method to a unity-gain buffer (amplifier with gain = 1).

Views: 58464
Khan Academy

This video shows a simple common emitter amplifier based on a 2N2222 NPN transistor, and reviews how to calculate the gain and frequency response of the circuit. The video is NOT intended to take a deep dive into the design considerations for the amplifier (The Signal Path Blog site already did a fine video on that). I discuss the basic equations for calculating the the in-band gain, as well as the low- and high- corner frequencies of the frequency response. All of these parameters - DC bias levels, bias currents, in-band gain and frequency response are then measured and shown. Notes in the video can be found here:
http://www.qsl.net/w/w2aew//youtube/Freq_response_common_emitter_amplifier.pdf

Views: 117123
w2aew

Views: 32
mywebbers1

Subject --- Analog Electronics
Topic --- CE Short Circuit Current Gain
Faculty --- Diptanshu Choubey
GATE Academy Plus is an effort to initiate free online digital resources for the first time in India and particularly Mr. Umesh Dhande, Founder and Director of GATE ACADEMY creative in order to shape the best career of Engineering student approaching to B.Tech/B.E. courses.
Check out our facebook page for more details. https://www.facebook.com/GATE.ACADEMY.PLUS
Watch out the below mentioned playlists for other videos on these subjects :
1. Analog Electronics --- https://bit.ly/2IEFMq5
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3. Electronic Devices & Circuits --- https://bit.ly/2NcEBBF
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7. Fluid Mechanics --- https://bit.ly/2tHaQRk
8. Signals and Systems --- https://bit.ly/2Khihsy

Views: 2541
GATE ACADEMY PLUS

Learn how Aol, loop gain, and 1/beta are used on bode plots to predict amplifier performance over frequency in this training series focused on op amp bandwidth.

Views: 2553
Texas Instruments

as the amount of negative feedback increases, gain decreases, bandwidth increases and input impedance increases for voltage amplifier and trans conductance amplifiers

Views: 2970
GATE paper

This video is about cadence simulation of single stage telescopic folded cascode amplifier. In this video I have showed steps to simulate and measurement of DC gain , phase margin and gain bandwidth product. For more info and detailed steps visit http://www.easyvlsi.com/design-simulat…f-an-apmlifier/

Views: 12901
Virbhadra Rathod

Operational amplifiers are used in many circuits - one of the main applications is in amplifiers. Here the operational amplifier gain is of key importance.
Although there are both inverting and non-inverting amplifiers which have their own calculations, there is a generic equation for these circuits. The generic formula can be used to develop the equations for the inverting and non-inverting configurations.
The gain of these operational amplifier circuits is governed by the level of negative feedback. Applying negative feedback provides a defined level of gain, wider bandwidth, lower distortion as well as a number of other advantages. However it is often the operational amplifier gain that is of major importance.
When looking at the inverting amplifier circuit, the equation for the circuit can be calculated from the simple formula Av = R2/R1.
For the non-inverting amplifier the gain is slightly different and can be calculated from the formula Av = 1+ (R2/R1).
It is also possible to use the non-inverting amplifier as a buffer amplifier with a unity voltage gain by looping the output back to the inverting input, i.e. R1 = infinity and R2 = zero. In this way the voltage gain can be calculated to be 1.
So in summary both inverting and non-inverting amplifier gain is easy to calculate using the simple formulas.
More information can be found at: https://www.electronics-notes.com/articles/analogue_circuits/operational-amplifier-op-amp/gain-equations.php
Also subscribe to our YouTube Channel: https://youtube.com/ElectronicsNotes

Views: 10175
ElectronicsNotes

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Universalppts

Accidentally bumped the circuit towards the end.

Views: 234
Matthew Borba

In this video, the non-inverting op-amp configuration and how to use Op-Amp as a buffer or as a voltage follower (Unity Gain Amplifier) has been discussed.
In this video, the input impedance of both inverting and non-inverting opamp configuration has also been derived.
And inverting and non-inverting op-amp configurations are compared with respect to input impedance.
Non-inverting Op-Amp:
In non-inverting Op-Amp configuration, the input is applied at the non-inverting terminal of the op-amp and feedback is applied from the output the inverting end of the op-amp.
In this configuration, the input and output voltages are in phase with each other.
The input impedance of this configuration is ideally infinite and practically it is very high.
Op-Amp as a buffer (Op-Amp as Voltage follower):
Op-Amp can be used as a buffer in the non-inverting configuration. In this configuration, output voltage follows the input voltage. Or in another way, the gain of the Op-amp is one (Unity). That's why it is also known as unity gain amplifier.
The input impedance of this configuration is very high and that is why it can be used to isolate the different circuit stages.
The timestamps for the different topics in the video is given below:
0:52 Non-Inverting O-Amp Configuration
1:51 Derivation of Closed Loop Voltage gain for Non-Inverting Op-Amp Configuration
5:00 Advantage of Non-Inverting Op-Amp configuration over Inverting Op-Amp configuration
6:09 Input Impedance of Inverting Op-Amp
7:25 Input Impedance of Non-Inverting Op-Amp
9:28 Op-Amp as Buffer (or Op-Amp as Voltage Follower)
This video will be helpful to all students of science and engineering in understanding the concept of non-inverting op-amp and understanding how to use the op-amp as a buffer or as a voltage follower.
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Views: 63099
ALL ABOUT ELECTRONICS

In this video, what is Common Mode Rejection Ratio (CMRR) in op-amp and what is the importance of CMRR has been explained with the example.
What is CMRR?
CMRR is the ratio of differential gain and the common mode gain.
For ideal op-amp, the value of CMRR is infinite, but for practical op-amp's the value of CMRR used to be in the range of 80 to 100 dB.
Common mode gain is the gain of op-amp when same input is applied or same input is present at both input terminals.
Op-Amp in open loop condition acts as a differential amplifier and amplifies the difference between the two input terminals.
So, if both inputs are equal then the output of the op-amp in ideal condition should be zero.
But actually, some output used to be present at the output terminal.
And the ratio of this common output to the input voltage is known as the common mode gain.
For ideal op-amp, the value of common mode gain should be zero. But practical op-amp has some finite value (less than 1) of common mode gain.
Noise is the main source of common mode input signal. And op-amp should be able to suppress this noise as much as possible.
And how well it is able to suppress this noise is represented by this CMRR.
The timestamps for the different topics covered in the video.
0:20 What is CMRR and what is the importance of CMRR.
4:58 Example
This video will be helpful to all the students of science and engineering in understanding the concept of CMRR in op-amp.
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ALL ABOUT ELECTRONICS

The (http://www.linear.com/product/LTC6268) LTC6268 is a new op amp with a unique combination of bandwidth, input and output characteristics. It has a gain bandwidth of 500MHz with a typical input bias current of only 3 femptoamps. The input capacitance is 0.45pF and the output can drive a 200Ω load. This combination of features can bring new levels of performance to traditional applications as well as enable new application possibilities. It is available as a single or dual (http://www.linear.com/product/LTC6269) (LTC6269) configuration. It is also available in a decompensated version (http://www.linear.com/product/LTC6268-10) (LTC6268-10) specifically for transimpedance applications.

Views: 806
LinearTechnology

In this video, op-amp integrator circuit has been discussed (with derivation) and few examples have been solved based on this op-amp integrator circuit.
Op-Amp as Integrator:
In inverting op-amp configuration, by replacing the feedback resistor with a capacitor, it can be used as integrator circuit. The relation between the output and input has been derived in this video.
Limitation of simple integrator circuit:
In this simple integrator circuit, for DC input or for very low-frequency signal the capacitor will act as an open circuit and the input signal will see a very high gain (Open loop gain of the op-amp). So, even if very small DC signal is present at the input, it can lead the output into the saturation.
So, even if your signal does not contain any DC signal, but because of the input offset voltage, the output of the op-amp may get either saturated or distorted.
Practical Integrator Circuit:
The problem of the simple integrator circuit can be overcome by connecting feedback resistor in parallel with the feedback capacitor.
So, because of the feedback resistor, the gain of the circuit for DC signal will get restricted and saturation of the output voltage can be avoided.And the circuit will behave as a low-pass filter.
The condition for proper integration of input signal:
For proper integration of input signal, the frequency of the input signal should be higher than the cut-off frequency. (At least 10 times the cut-off frequency)
The timestamps for the different topic covered in the video is given below:
0:48 Op-Amp as an integrator (Derivation)
4:32 Output of Integrator for the different input signals
5:54 Limitations of the simple integrator circuit
8:57 Practical Op-Amp integrator
12:08 Example 1
13:10 Example 2
14:51 Example 3
17:15 Example 4 (For Practice)
The link to the related videos on the op-amp:
Introduction to Operational Amplifier:
https://www.youtube.com/watch?v=kiiA6WTCQn0
Inverting Op-Amp:
https://www.youtube.com/watch?v=AuZ00cQ0UrE
Non-Inverting Op-Amp:
https://www.youtube.com/watch?v=uyOfonR_rEw
This video will be helpful to all students of science and engineering in understanding the working of op-amp integrator.
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ALL ABOUT ELECTRONICS

Table of Contents:
00:09 L5.6: Analog/RF CMOS
00:34 CMOS inverter
00:45 gain
01:00 DC bias
01:27 small signal AC amplification
02:10 why analog /RF why CMOS?
03:07 CMOS device metrics (digital)
03:22 small signal model
04:43 transconductance
07:15 MOSFET transconductance
07:42 transconductance (subthreshold)
09:12 small signal gain
10:01 effect of output resistance
10:35 self-gain
11:20 self-gain for 65 nm digital CMOS
11:59 self-gain vs. scaling
12:36 high freq. performance s.c. current gain
14:14 gain-bandwidth product
15:52 gain-bandwidth product (ii)
16:31 fT vs. scaling
16:48 fMAX
17:34 analog figures of merit
18:16 IEDM 2007
18:26 Sungjae Lee, et al. IEDM 2007
18:51 Sungjae Lee, et al. IEDM 2007
19:11 Sungjae Lee, et al. IEDM 2007
19:25 summary
This video is part of nanoHUB-U's course Nanoscale Transistors developed by Mark Lundstrom. (https://nanohub.org/courses/NT)
Nanoscale Transistors is a five-week online course that develops a unified framework for understanding essential physics of nanoscale transistors, their important applications, trends and directions, and how they differ from their micrometer scale cousins.

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