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Q Explain about 'Darlington Amplifier'?
DARLINGTON AMPLIFIER : A CC stage followed by another CC stage has an input resistance of about (b + 1) 2 times the emitter resistance of the second stage. More precisely, using the b transform, it is
If RE1 is removed, the second term is about b2 times RE2. Furthermore, if the collectors are connected together, the result is a Darlington stage, as shown below.
This stage can be viewed as a "Darlington transistor" because it has three terminals and an equivalent b of about b2 . Darlington BJTs can be used in any of the three BJT configurations.
Norton's theorem procedure: 1. Remove R L from the circuit. Search I N by shorting links output terminal. 2. Search R N by short-circuit voltage source or open-circuit
equivalent circuit for transistor using h parameters
Q. Common-Drain JFET Amplifier? Figure (a) shows a CD JFET amplifier in which resistors R 1 , R 2 , and R SS are selected by the bias design, and capacitors CG and CS are chos
please give the source coding of fast decoupled method
Q. Explain Commutator Action in dc machine? As a consequence of the arrangement of the commutator and brushes, the currents in all conductors under the north pole are in one di
costruction and working of dc motor
What do you understand by orthographic projection ? Illustrate with the help of Matrix representation.
Effect of Supply Voltage a.As the applied as voltage is increased hysteresis loss increases. b.Eddy current losses are given by W e α f 2 t 2 B 2 m Where B m =
Q. Use of Computers in Power Systems? The control and stability of any electric power system is indeed extremely important, in particular when a system is expected to maintain
Metallic Bonding In metals, the outer shell is filled through no more than three electrons (loosely bound and given up easily) => great chemical activity and very high elec
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