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Title: Amplifiers
Page Link: Amplifiers -
Posted By: sri seri
Created at: Thursday 05th of October 2017 05:28:25 AM
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Function of Amplifiers
Amplifiers provides
GAIN
Filtering, Signal processing, Correction for Nonlinearities
Ideal OP Amps
Transfer Function = Output / Input
Voltage Amp TF (Gain):

Usually Av 1
OP Amp is preferred
Easy to use in circuit designed compared to discrete Transistor circuits
Ideal OP Amps (Cont.)
Assumptions
Open loop Gain = Infinity
Input Impedance Rd = Infinity
Output Impedance Ro = 0
Bandwidth = Infinity
Infinite Frequency Response
vo=0 when v1 = v2
No Offset Volt ....etc

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Title: magnetic amplifiers ppt
Page Link: magnetic amplifiers ppt -
Posted By: sruthy
Created at: Thursday 05th of October 2017 03:52:51 AM
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please send me magnetic amplifiere ppt and documentation to [email protected] ....etc

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Title: Common Emitter BJT Amplifier Design Current Mirror Design
Page Link: Common Emitter BJT Amplifier Design Current Mirror Design -
Posted By: dheeraj rao
Created at: Thursday 17th of August 2017 05:16:14 AM
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Common Emitter BJT Amplifier Design Current Mirror Design


Some Random Observations
Conditions for stabilized voltage source biasing
Emitter resistance, RE, is needed.
Base voltage source will have finite resistance, RB.
needs to be much larger than RB.
Small RB - relative to RS - will attenuate input signal.
Larger RE permits larger RB, but results in lower gain.
Gain = -RC/RE for RE >> re.
Split RE with bypassing increases gain.
Requires large bypass cap ....etc

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Title: PARAMETRIC AMPLIFIERS
Page Link: PARAMETRIC AMPLIFIERS -
Posted By: vishal jaiswal
Created at: Thursday 05th of October 2017 04:55:43 AM
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Although the use of parametric amplifiers for high frequency, low noise amplification is relatively recent, the principles themselves are not at all new. They were first propounded by Lord Reyleigh in the 1880s for Mechanical Systems and by R. Hartley in 1930s for electrical applications. The need for extremely low noise amplification , as in radio telescopes, space probe tracking and communications, and tropospheric scatter receivers, spurred the design of useful parametric amplifiers in the late 1950s. The low ....etc

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Title: Characteristics of Operational Amplifiers
Page Link: Characteristics of Operational Amplifiers -
Posted By: ramudagenius
Created at: Thursday 17th of August 2017 08:26:23 AM
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Characteristics of Operational Amplifiers

In analog computers and similar circuits, we make the assumption that the key component of the circuit the operational amplifier is perfect and ideal, with an infinite voltage gain and zero input current. Unfortunately, this is not possible in real-world devices. The questions we need to answer, then, are: how close can we come to the ideal, and how much error will be introduced into the results?
__
A very typical commercial IC op amp circuit is the 741. This IC has ....etc

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Title: Magnetic Amplifiers
Page Link: Magnetic Amplifiers -
Posted By: johny
Created at: Thursday 05th of October 2017 05:14:58 AM
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A magnetic amplifier is a device which controls the power delivered from an a.c. source by employing a controllable non linear reactive elements or circuit generally interposed in series with the load. The power required to control the reactive element or circuit is made for less than the amount of power controlled; and hence power amplification is achieved. The non-linear reactive element is a saturable reactor. When used in a combination with a set of high-grade rectifiers, it exhibits power amplification properties in the sense that small ch ....etc

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Title: Common Base and Common Collector Amplifiers
Page Link: Common Base and Common Collector Amplifiers -
Posted By: nidhinmohan
Created at: Thursday 05th of October 2017 04:05:52 AM
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Common Base Amplifiers
Uses the same stabilised bias scheme as CE configuration.
Uses the same stabilised bias scheme as CE configuration.
The base is grounded for a.c. signals using a large capacitor.
Signal input at the emitter (between the emitter and the common base)
Signal output at the collector (between the collector and the common base) ....etc

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Title: CMRR ENHANCEMENT TECHNIQUES FOR CURRENT-MODE INSTRUMENTATION AMPLIFIERS
Page Link: CMRR ENHANCEMENT TECHNIQUES FOR CURRENT-MODE INSTRUMENTATION AMPLIFIERS -
Posted By: Premdas
Created at: Thursday 05th of October 2017 04:16:03 AM
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Common mode rejection ratio (CMRR) is important performance parameter of any difference amplifier. It is the ratio of the differential gain to the common-mode gain, generally expressed in dB. It signifies the ability of an opamp to reject common mode signal, the signal which appears simultaneously at both its input terminals. The CMRR is of great importance when it comes to noise rejection. For applications involving high CMRR, instrumentation amplifiers consisting of three opamps are generally used. It has a major disadvantage that the value o ....etc

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Title: class d amplifiers
Page Link: class d amplifiers -
Posted By: sangu
Created at: Thursday 05th of October 2017 05:23:09 AM
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my respected coordinators,my name is amit navneet swain, i am from bhubaneswar,orissa and i am doing btech in GITA,bbsr. i want to know that why this class d amplifier is introduced to electronics?i mean what were the difficulties with the class ab amplifier?kindly explain me the reason..i expect i would get the best response from u.. ....etc

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Title: Methods to Improve TCP Throughput in Wireless Networks With High Delay Variability
Page Link: Methods to Improve TCP Throughput in Wireless Networks With High Delay Variability -
Posted By: pavithrashripad
Created at: Thursday 17th of August 2017 06:00:13 AM
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The Highly variable round-trip times (RTTs) in wireless networks causes spurious timeouts which can be a reason for the unnecessary retransmission and the thus unnecessarily degrading throughput for the Transmission Control Protocol (TCP).The methods to improve TCP throughput in wireless networks is discussed in this article. One of the method involves the use of a retransmission timeout (RTO) threshold which is slightly higher than the standard. The other method described involves the use of selective repeat (SR) and go-back-N (GBN) as retran ....etc

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