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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.
explain a basic measurement system
Q. For given asymptotic Bode plots. (a) Find ¯H 1 , ¯H 2 , and ¯H 3 at ω = 5 rad/s. (b) At what angular frequency ω is the magnitude of ¯H 4 (jω) one-half of the magnitude o
Q. Explain low-frequency response of RC coupled amplifier. What are the reasons for reduction in gain at low frequencies? The RC coupled amplifier circuit contains capacit
Analysis in equilibrium : Solution of Poisson's Equation with suitable boundary conditions - Non-equilibrium analysis: The electron and hole densities are no longe
Calculate Voltage and Current Phasors on a Phasor Diagram A synchronous motor is operated at rated load and unity power factor. The field current is increased by 20%. Show the
Consider the 220-V, 1800-r/min dc motor, controlled by a three-phase fully controlled rectifier from a 60-Hz ac source. The armature-circuit resistance and inductance are 1.5 and
Q. Determine the Laplace transform of the waveform shown in Figure.
Q. What are multistageand single stage networks? Compare strengths and weaknesses of each. OR List the key difference in single stage, two stage and three stage Networks. A
What are the advantages of distributing windings in an alternator?
Explain Thermoplastic materials. Thermoplastic materials: The properties of such plastic materials do not change considerably when they are melted and after that cooled and s
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