The document discusses different classes of amplifiers. It describes Class A amplifiers as simple designed amplifiers commonly used in audio systems due to their low distortion. Class B amplifiers use two transistors in a push-pull arrangement to amplify either the positive or negative half of the waveform. Class AB combines aspects of Class A and B. Class C amplifiers have poor linearity but high efficiency. Class D, S, T, F, and G amplifiers are switching amplifiers that can achieve near 100% efficiency.
Electrical Engineering is the Branch of Engineering. Electrical Engineering field requires an understanding of core areas including Thermal and Hydraulics Prime Movers, Analog Electronic Circuits, Network Analysis and Synthesis, DC Machines and Transformers, Digital Electronic Circuits, Fundamentals of Power Electronics, Control System Engineering, Engineering Electromagnetics, Microprocessor and Microcontroller. Ekeeda offers Online Mechanical Engineering Courses for all the Subjects as per the Syllabus. Visit : https://ekeeda.com/streamdetails/stream/Electrical-and-Electronics-Engineering
This is about the comparison between BJTs and FETs and about their types. Drain and Transfor characteristics of both. Different types of amplifiers.Circuit diagrams are given with details description.
in this slide you will learn what are classes of amplifiers and what is main difference between all classes of amplifier
and after reading this slide you will be able to explain all clases of amplifier
This Presentation Of Classes Of Amplifiers which is based on class a b ab and c amplifier by Arsalan Qureshi student of Dawood University Roll no: D-16-TE-09.
Objectives
Understand the concept of amplifiers
Identify and apply internal transistor parameters
Understand and analyze common-emitter, common-collector and common-base amplifiers
Introduction
One of the primary uses of a transistor is to amplify ac signals. It has to be able to do it without distorting the original input.
Amplifier
The collector curves and load lines help us to relate the Q-point and its proximity to cutoff and saturation. The Q-point is best established where the signal variations do not cause the transistor to go into saturation or cutoff. For perfect amplifier Q-point must be in the middle of the active region.
Amplifier Operation
The region between cutoff and saturation is called the linear region. A transistor which operates in the linear region is called a linear amplifier. Note that only the ac component reaches the load because of the capacitive coupling and that the output is 180º out of phase with input.
The Common-Emitter Amplifier
The common-emitter amplifier exhibits high voltage gain and current gain. The output signal is 180º out of phase with the input signal.
Characteristics
Voltage gain -High
Current gain - High
Power gain - High
Input or output phase relationship - 180 degree
Input resistance - Low
Output resistance -High
Electrical Engineering is the Branch of Engineering. Electrical Engineering field requires an understanding of core areas including Thermal and Hydraulics Prime Movers, Analog Electronic Circuits, Network Analysis and Synthesis, DC Machines and Transformers, Digital Electronic Circuits, Fundamentals of Power Electronics, Control System Engineering, Engineering Electromagnetics, Microprocessor and Microcontroller. Ekeeda offers Online Mechanical Engineering Courses for all the Subjects as per the Syllabus. Visit : https://ekeeda.com/streamdetails/stream/Electrical-and-Electronics-Engineering
This is about the comparison between BJTs and FETs and about their types. Drain and Transfor characteristics of both. Different types of amplifiers.Circuit diagrams are given with details description.
in this slide you will learn what are classes of amplifiers and what is main difference between all classes of amplifier
and after reading this slide you will be able to explain all clases of amplifier
This Presentation Of Classes Of Amplifiers which is based on class a b ab and c amplifier by Arsalan Qureshi student of Dawood University Roll no: D-16-TE-09.
Objectives
Understand the concept of amplifiers
Identify and apply internal transistor parameters
Understand and analyze common-emitter, common-collector and common-base amplifiers
Introduction
One of the primary uses of a transistor is to amplify ac signals. It has to be able to do it without distorting the original input.
Amplifier
The collector curves and load lines help us to relate the Q-point and its proximity to cutoff and saturation. The Q-point is best established where the signal variations do not cause the transistor to go into saturation or cutoff. For perfect amplifier Q-point must be in the middle of the active region.
Amplifier Operation
The region between cutoff and saturation is called the linear region. A transistor which operates in the linear region is called a linear amplifier. Note that only the ac component reaches the load because of the capacitive coupling and that the output is 180º out of phase with input.
The Common-Emitter Amplifier
The common-emitter amplifier exhibits high voltage gain and current gain. The output signal is 180º out of phase with the input signal.
Characteristics
Voltage gain -High
Current gain - High
Power gain - High
Input or output phase relationship - 180 degree
Input resistance - Low
Output resistance -High
Electrical current, voltage, resistance, capacitance, and inductance are a few of the basic elements of electronics and radio. Apart from current, voltage, resistance, capacitance, and inductance, there are many other interesting elements to electronic technology. ... Use Electronics Notes to learn electronics online.
Power Amplifier circuits.
Output stages of types of power amplifier (class A, class B, class AB, class C, class D)
Distortions( Harmonic and Crossover).
Push-pull amplifier with and without transformer.
Complimentary symmetry and Quasi- complimentary symmetry push pull amplifier.
Negative amplifiers and its types Positive feedback and Negative feedbackimtiazalijoono
Negative amplifiers
What is Feedback?
Positive feedback
Negative feedback
Feedback Circuit
Principles of Negative Voltage Feedback In Amplifiers
Gain of Negative Voltage Feedback Amplifier
Advantages of Negative Voltage Feedback
Principles of Negative Current Feedback
Current Gain with Negative Current Feedback
Electrical current, voltage, resistance, capacitance, and inductance are a few of the basic elements of electronics and radio. Apart from current, voltage, resistance, capacitance, and inductance, there are many other interesting elements to electronic technology. ... Use Electronics Notes to learn electronics online.
Power Amplifier circuits.
Output stages of types of power amplifier (class A, class B, class AB, class C, class D)
Distortions( Harmonic and Crossover).
Push-pull amplifier with and without transformer.
Complimentary symmetry and Quasi- complimentary symmetry push pull amplifier.
Negative amplifiers and its types Positive feedback and Negative feedbackimtiazalijoono
Negative amplifiers
What is Feedback?
Positive feedback
Negative feedback
Feedback Circuit
Principles of Negative Voltage Feedback In Amplifiers
Gain of Negative Voltage Feedback Amplifier
Advantages of Negative Voltage Feedback
Principles of Negative Current Feedback
Current Gain with Negative Current Feedback
A voltage amplifier circuit is a circuit that amplifies the input voltage to a higher voltage. So, for example, if we input 1V into the circuit, we can get 10V as output if we set the circuit for a gain of 10. Voltage amplifiers, many times, are built with op amp circuits.
Students will be able to understand about the various Amplifiers, its type and design. Students will be able to remember the working patterns and principles of different Amplifiers types. Students will be able to choose the right Amplifiers for speakers. Students will know about the characteristics of each Amplifiers.
2. Recalling amplifiers
Simply the amplifiers are called as an amp
The amplifier is an electronic device used to
increase the signal of current, voltage and power
The function of the amplifier is by using the power
from the power supply and longer altitude, it
controls the output signal with the help of input
signal
An amplifier modulates the out of the power
supply is based on the properties of the input
signal
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3. Class A amplifiers
The class A amplifiers are simple designed
amplifiers and this amplifier is most commonly
used amplifiers
Basically, the class A amplifiers are the best
class amplifiers because of their low distortion
levels
This amplifier is the best in the audio sound
system and in most of the sound system use
the class A amplifier
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4. Contd.
The class A amplifiers are formed by the
output stage devices which are biased for the
class A operation
By comparing the other classes amplifiers to
class A amplifier has the highest linearity.
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5. Class B amplifiers
The class B amplifiers are the positive and
negative halves of the signals, that are
allocated to the different parts of the circuits
and the output device switched ON and OFF
continuously
The basic class B amplifiers are used in two
complementary transistors
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6. Class B amplifier
These two transistors of each half of the
waveform with its output are configured in a
push-pull type arrangement
Hence the each amplifier amplifies only half of
the output waveform
In the Class B amplifier, if the input signal is
positive, then the positively biased transistor
conduct and the negative transistor is
switched OFF.
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7. Contd.
If the input signal is negative, then the positive
transistor switches OFF and negative biased
transistor turn ON
Hence the transistor conduct half of the time
whatever it may be like positive or negative
half cycle of the input signal.
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8. Class AB
The class AB is the combination of class A and
class B amplifier
The class AB amplifiers are using commonly in
the audio power amplifiers
The conduction angle of Class AB amplifier is in
between 180 to 360 which is depending on the
bias point
The advantage of the small bias voltage is to give
in series resistance and diode.
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9. Class C amplifier
The design of class C amplifier has a great
efficiency and poor linearity
In the previous amplifiers, we have discussed
the class A, B and AB are the linear amplifiers
The class C amplifier is a deeply biased
hence the output current is zero for more than
the one-half of the input signal and the
transistor idling at the cut off point
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10. Class D amplifier
The class D amplifier is non-linear switching
amplifiers
This amplifier can reach 100% efficiency in
theoretically and there is no period during the
cycle
The voltage and the current waveforms overlap,
current is drawn only with the help of transistor
which is in ON state
These amplifiers are also called as the digital
amplifiers
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11. Class F amplifier
The F amplifiers are used to increase the
efficiency and output by the harmonic
resonators in the form of output network and
to shape the output waveform in a square
wave
The class F amplifiers have more than 90% of
efficiency if the infinite harmonic tuning is
used
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12. Class S amplifier
The class S amplifiers are similar operations
to the class D amplifiers
These amplifiers are Non-linear switching
mode amplifiers
It converts the analog input signals to the
digital square wave pulses by using the delta-
sigma modulations.
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13. Contd.
It amplifies them in to increase the output
power by the help of band pass filter
The digital signal of the switching amplifier is
fully in ON or OFF state and its efficiency can
reach 100%
13
14. Class T amplifier
The class T amplifiers are designed with a
type of digital switching amplifiers
Now a days these amplifiers became more
popular
This amplifier converts the signal from analog
signal to the digital pulse width modulation
signal and the amplification increase the
efficiency of an amplifiers
14
15. Class G amplifier
The enhancement of class G Amplifier is the basic
of Class AB Amplifier
The class G amplifier used in the multiple power
supply rails of different voltages
Automatically switches between the supply rails
as the input signal changes
The contact switching decreases the average
power consumption hence, the power loss is
produced by the wasted heat
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