This document provides an overview of operational amplifiers and integrated circuits. It discusses the advantages of integrated circuits, the basic processes for fabricating monolithic ICs, and the ideal characteristics and configurations of operational amplifiers. Operational amplifiers are high-gain electronic voltage amplifiers with differential inputs and a single-ended output. Their internal structure, DC and AC characteristics, and applications in inverting and non-inverting amplifier circuits are described in detail. Frequency compensation techniques are also covered to ensure stability in feedback applications.
this presentation is based on basic description of inverting and non-inverting amplifiers using op-amps and their medical use, hope it helps students :)
The performance obtainable from a single-stage amplifier is often insufficient for many applications, hence several stages may be combined forming a multistage amplifier. These stages are connected in cascade, i.e. output of the first stage is connected to form input of second stage, whose output becomes input of third stage, and so on.
thank u
Hansraj MEENA
This presentation contains the basic information you need to know about operational amplifier.
I have tried to cover all the basic info. If anything is left out or you have any suggestions i will appreciate it.
this presentation is based on basic description of inverting and non-inverting amplifiers using op-amps and their medical use, hope it helps students :)
The performance obtainable from a single-stage amplifier is often insufficient for many applications, hence several stages may be combined forming a multistage amplifier. These stages are connected in cascade, i.e. output of the first stage is connected to form input of second stage, whose output becomes input of third stage, and so on.
thank u
Hansraj MEENA
This presentation contains the basic information you need to know about operational amplifier.
I have tried to cover all the basic info. If anything is left out or you have any suggestions i will appreciate it.
A complete description of including circuit diagram, gain equation, features of Instrumentational amplifier , its working principle, applications, practical circuits, Proteus simulation and conclusion.
Uet, Peshawar Pakistan
Batch-06
Introduction
Band Pass Amplifiers
Series & Parallel Resonant Circuits & their Bandwidth
Analysis of Single Tuned Amplifiers
Analysis of Double Tuned Amplifiers
Primary & Secondary Tuned Amplifiers with BJT & FET
Merits and de-merits of Tuned Amplifiers
Introduction to operational Amplifier. For A2 level physics (CIE). Discusses characteristics of op amp, inverting and non inverting amplifier, and voltage follower, and transfer characetristics, virtual earth , etc
This presentation covers types of noise in communication system, noise modelling, thermal noise, shot noise, experimental determination of noise figure, noise figure, friss formula with numerical.
A complete description of including circuit diagram, gain equation, features of Instrumentational amplifier , its working principle, applications, practical circuits, Proteus simulation and conclusion.
Uet, Peshawar Pakistan
Batch-06
Introduction
Band Pass Amplifiers
Series & Parallel Resonant Circuits & their Bandwidth
Analysis of Single Tuned Amplifiers
Analysis of Double Tuned Amplifiers
Primary & Secondary Tuned Amplifiers with BJT & FET
Merits and de-merits of Tuned Amplifiers
Introduction to operational Amplifier. For A2 level physics (CIE). Discusses characteristics of op amp, inverting and non inverting amplifier, and voltage follower, and transfer characetristics, virtual earth , etc
This presentation covers types of noise in communication system, noise modelling, thermal noise, shot noise, experimental determination of noise figure, noise figure, friss formula with numerical.
Simulation Analysis of Ac/Dc Adapter Under Zero No-Load Power Consumption usi...IJPEDS-IAES
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SOLID STATE TRANSFORMER - USING FLYBACK CONVERTERAbhin Mohan
FUTURISTIC ELECTRICAL ENGINEERING PROJECT.
A Device that can step up as well as step down coltage and get output as both DC or AC. Total flexibility of Power using DC link by Flyback Coverter.
Pre Final Year project/ mini project for Electronics and communication engine...Shirshendu Das
Mini project for Electronics and communication engineering (ECE) to build an AC to DC power supply using Full Wave Rectifier having input as 220-240V AC and giving stable filtered output of 5V, -5V & variable 5V DC. Simulation of the circuit was done in Proteus design suite.
An Improved Single Phase Transformer less Inverter Topology for Cost Effecti...IJMER
In grid connected PV systems, the elimination of isolation transformer introduces common
mode leakage current due to the parasitic capacitance between PV panels and the ground. The common
mode leakage current reduces the efficiency of power conversion stage, affects the quality of grid
current, deteriorate the electric magnetic compatibility and give rise to various safety threats. In order
to eliminate the leakage current, an improved transformer less topology with virtual DC bus concept is
proposed here. By connecting the grid neutral line directly to the negative pole of the DC bus, the stray
capacitance between the PV panels and the ground is bypassed. The topology consists of only five power
switches, two capacitors and the filter section. Therefore, the power electronics cost can be curtailed.
This advanced topology can be modulated with the sinusoidal pulse width modulation (SPWM) to reduce
the output current ripple. The simulation result of the proposed topology using MATLAB/SIMULINK is
presented.
High Reliability and Efficiency Single phase Transformerless Inverter for Gri...Anoop kumar Niravuparambil
TODAY, the energy demand is increasing due to the rapid increase of the human population and fast-growing industries. Hence, renewable energy plays an important role to replace traditional natural resources such as fuel and coal. Photovoltaic (PV) energy has recently become a common interest of research because it is free, green, and inexhaustible.
Generally, there are two types of grid-connected PV systems, i.e., those with transformer and without transformer. Besides stepping up the voltage, it plays an important role in safety purpose by providing galvanic isolation, and thus eliminating leakage current and avoiding dc current injection into the grid. Nevertheless, the transformers are bulky, heavy, and expensive. Even though significant size, weight and reduces the efficiency of the entire PV system. Hence, transformerless PV systems are introduced to overcome these issues. They are smaller, lighter, lower in cost, and highly efficient
However, safety issue is the main concern for the transformerless PV systems due to high leakage current. Without galvanic isolation, a direct path can be formed for the leakage current to flow from the PV to the grid. At the same time, the fluctuating potential, also known as common-mode voltage (CMV), charges and discharges the stray capacitance which generates high leakage current. This will introduce losses in the PV system. There are many methods available for reducing this leakage current. Here are some inverter topologies are proposed, in-order to achieve High efficiency for the grid connected photovoltaic system
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
4. Advantages of integrated circuits
1. Miniaturization and hence increased equipment
density.
2. Cost reduction due to batch processing.
3. Increased system reliability due to the elimination of
soldered joints.
4. Improved functional performance.
5. Matched devices.
6. Increased operating speeds.
7. Reduction in power consumption
AIC– Module 1
7. Silicon wafer (substrate) preparation
• A wafer, also called a slice or substrate,
is a thin slice of semiconductor material,
such as a crystalline silicon, used in
electronics for the fabrication of
integrated circuits and in photovoltaics
for conventional, wafer-based solar cells.
• The wafer serves as the substrate for
microelectronic devices built in and
over the wafer and undergoes many micro
fabrication process steps such as doping or
ion implantation, etching, deposition of
various materials, and photolithographic
patterning. Typical wafer
AIC– Module 1
8. Photolithography
The process of photolithography makes it possible to produce microscopically small
circuit and device pattern on si wafer.
AIC– Module 1
9. OP-AMP
• An operational amplifier (often op-amp or opamp) is a DC-coupled
high-gain electronic voltage amplifier with a differential input and,
usually, a single-ended output.
• In this configuration, an op-amp produces an output potential (relative
to circuit ground) that is typically hundreds of thousands of times larger
than the potential difference between its input terminals.
AIC– Module 1
25. 10/3/2023 25
Current sources as Active loads
The current source can be used as an active load in both analog and digital IC‘s.
The active load realized using current source in place of the passive load (i.e. a
resistor) in the collector arm of differential amplifier makes it possible to achieve high
voltage gain without requiring large power supply voltage.
26. Differential Amplifier
• A differential amplifier is a type of electronic amplifier that amplifies the
difference between two input voltages but suppresses any voltage common
to the two inputs.
• It is an analog circuit with two inputs and and one output in which the
output is ideally proportional to the difference between the two voltages.
AIC– Module 1
49. 10/3/2023 49
To improve diferential mode
gain
Current mirror has high a.c.
resistance
Current mirror circuit acting as
load provides high a.c resistance
50. OP-AMP
• An operational amplifier (often op-amp or opamp) is a DC-coupled
high-gain electronic voltage amplifier with a differential input and,
usually, a single-ended output.
• In this configuration, an op-amp produces an output potential (relative
to circuit ground) that is typically hundreds of thousands of times larger
than the potential difference between its input terminals.
AIC– Module 1
55. 10/3/2023 55
INPUT STAGE OPERATIONAL-AMPLIFIER
Q1 to Q4 – Part of Differential amplifier inputs
Q5, Q6,Q8,Q9 – Current Source
Q7 – Supplies Base current
60. DC Characteristics of Op-Amp
• Input bias current
• Input offset -current
• Input offset voltage
• Thermal drift
Note:
The op-amp input is made up of differential amplifiers, which can be
made of BJT or FET.
10/3/2023 60
66. Input offset voltage
10/3/2023 66
In spite of the use of the above compensating techniques, it is found
that the output voltage may still not be zero with zero input voltage
[Vo ≠ 0 with Vi= 0].
This is due to unavoidable imbalances inside the op-amp and one may
have to apply a small voltage at the input terminal to make output
(Vo) = 0.
68. Thermal drift
10/3/2023 68
Bias current, offset current, and offset voltage change with
temperature.
A circuit carefully nulled at 25ºC may not remain. So when the
temperature rises to 35ºC. This is called drift.
Offset current drift is expressed in nA/ºC.
These indicate the change in offset for each degree Celsius change in
temperature.
69. AC Characteristics of Op-Amp
• Frequency Response
• Slew Rate
10/3/2023 69
Frequency Response
The variation in operating frequency will cause variations in gain
magnitude and its phase angle.
The manner in which the gain of the op-amp responds to different
frequencies is called the frequency response
70. 10/3/2023 70
The op-amp gain decreases (roll-off) at higher frequency what reasons to decrease
gain after a certain frequency reached.
There must be a capacitive component in the equivalent circuit of the op-amp.
For an op-amp with only one break (corner) frequency all the capacitors effects can
be represented by a single capacitor C.
72. 10/3/2023 72
From the phase characteristics that the phase angle is zero at frequency f = 0. At the
corner frequency f1 the phase angle is -45 (lagging and an infinite frequency the phase
angle is -90 .
It shows that a maximum of 90 phase change can occur in an op-amp with a single
capacitor C.
Zero frequency is taken as the decade below the corner frequency and infinite
frequency is one decade above the corner frequency.
74. Frequency Compensation
• The Network System formed to compensate the unstable system is
called compensating network
• Modifies the rate of change of gain and phase of op-amp
• Methods
• External Compensation
• Internal Compensation
10/3/2023 74
79. Voltage Sources
• A voltage source is a circuit that produces an output voltage V0,
which is independent of the load driven by the voltage source, or the
output current supplied to the load.
• The voltage source is the circuit dual of the constant current source
• Methods
1.Using the impedance transforming properties of the transistor, which
in turn determines the current gain of the transistor
2. Using an amplifier with negative feedback.
10/3/2023 79
81. Voltage References
• The circuit that is primarily designed for providing a constant voltage
independent of changes in temperature is called a voltage reference
Properties of a Voltage Reference
• Reference voltage must be independent of any temperature change.
• Reference voltage must have good power supply rejection which is as
independent of the supply voltage as possible
• the circuit should have low output impedance
10/3/2023 81
90. Analysis of Non-Inverting Amplifier
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