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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.
Q. What do you mean by Conductors and Insulators? In order to put charge in motion so that it becomes an electric current, one must provide a path through which it can flow eas
if a resistor is present between 2 branches in such way that its polarities are different to compare with one another so how we choose polarity of that resistor
Q. Describe Pulse dialling? Pulse dialling: 1. Generated through make and break contact. 2. DC Current pulse is generated. 3. Each number is separated by a short
To find out the largest of ten 8 bit numbers. Method: The numbers are stored in consecutive memory locations. The counter register is initialized with 0A and the address pointer po
Q. Wire-line and Fiber-optic channel? Wire-line channels are used extensively by the telephone network for voice, data, and video transmission. Twisted-pair wire lines (with
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
Q. A balanced wye-connected load with a per-phase impedance of 4 + j3 is supplied by a 173-V, 60-Hz three-phase source. (a) Find the line current, the power factor, the total
In this project we will consider the control of a synchronous generator supplying electricity to the grid. We will focus on the problem of frequency stability. The frequency at whi
How to Make LPG Safer in the Laboratory The following must be observed in the laboratory: 1. The LPG cylinders should be kept outside the laboratory in a ventilated room.
Equivalent Circuit of a DC Machine A review of the material presented with regard to elementary direct-current machines can be helpful at this stage to recall the principles of
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