Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. What is a darlington pair?
The Darlington circuit consists of two cascaded emitter followers with infinite emitter resistance in the first stage.here the two transistor form a composite pair, input impedance of the second transistor consisting of the emitter load resistance of the first transistor.
· Darlington emitter follower has high input impedance than the single stage emitter follower.
· Its voltage gain is less close to unity than a single stage emitter follower.
· The output impedance of a darlington circuit may be greater than or less than that of a single transistor emitter follower, depending upon the value of resistance.
· Major drawback of Darlington transistor pair is that the leakage current of the first transistor is amplified by the second; hence the overall leakage current is high. A Darlington pair is two transistors connected together to give a very high current gain. In addition to standard (bipolar junction) transistors, there are field-effect transistors which are usually referred to as FETs.
The emitter current of Tr1 is the base current of Tr2.
A change in base current of Tr1 can give a change 100 times larger in its emitter current. A change in the base current of Tr2 has a similar effect on its emitter current. Therefore there is an overall amplification of 100 x 100 = 10000 times. This circuit is sometimes called the Super Alpha Pair. It is often used as a power output stage.
With the help of schematic diagram illustrate Gas Power Plant. Describe the effect of reheating, regeneration and inter cooling with the help of suitable T-S diagrams. Give the
Q. The inductance per unit length in H/m for parallel-plate infinitely long conductors in air is given by L = µ 0 d/w = 4π×10 -7 d/w, where d and w are inmeters. Compute L (per un
algorithm for Reversing the digits of an integer
Probelm: (a) Explain indexed addressing in 8051. (b) How does the 8051 distinguish between a byte address and a bit address? (c) How do open-loop and closed loop appli
How is segmentation implemented in typical microprocessors? The first advantage is as memory segmentation has is that only 16 bit registers are needed both to store segment bas
Discuss the term D/A conversion. D/A conversion: Digital-to-analog or analog-to-digital conversions are two very significant aspects of digital data processing. Digital-to-
Cycloconverter Scherbius Drive In this drive instead of dual controlled used in link scherbius drive one phase controlled line commutated cyclconverter is used. This
Types of High Voltage Distribution System A High Voltage Distribution System could be of the subsequent types: - Three phase Extension HT line from the primary substation a
Give a short description of soft ferrites . Soft ferrites and their applications: all non- metallic compounds are consisting of ferric oxide and one or two bivalent metal oxid
Q. Explain the applications of emitter follower. Because of high input impedance and low output impedance an emitter follower is capable of transferring maximum power from the
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd