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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.
Successive approximation ADC One method of addressing digital ramp ADC's shortcomings is so-called successive approximation ADC. Only change in this design is a very special c
Guarding Against Losses in Service Cables and Connections The service cables to consumer premises are often a source of loss that can be reduced given below. The length of ser
Q. Antinoise Systems — Noise Cancellation? Traditionally sound-absorbing materials have been used quite effectively to reduce noise levels in aircraft, amphitheaters, and other
ferroelectric materials are charatrised by
Q Two charges of equalmagnitude 5µC but opposite sign are separated by a distance of 10 m. Find the net force experienced by a positive charge q = 2 µC that is placed midway betwee
Q. What are concentrators? Elucidate how it helps in connecting number of subscribers. Ans: In rural areas, subscribers are usually dispersed. It is both expensive and unn
what is the necessity of copper brushes in dc motors?
Q. Discuss in brief on combination clippers ? Combination clippers are a combination of biased positive and negative clippers. With a combination clipper, a portion of both pos
direct reading probes
For a helical antenna, the half-power beamwidth and directive gain are given by where C = πD, N = L/S, and S = C tan α,in which α is called the pitch angle, and The
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