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A common-collector (CC) amplifier is also known as an emitter follower (or a voltage follower) due to the fact that the output voltage "follows" the input by being approximately equal to the input voltage. The amplifier is shown in Figure (a), in which the collector forms a common terminal between the input and output circuits, and resistors R1, R2, and RE are determined by biasing. Capacitors CB and CE are chosen large enough to appear as short circuits at the lowest frequency of interest in the input signal vS. The output voltage vL is taken across the load resistor RL. The small-signal ac equivalent circuit of the amplifier is shown in Figure (b), whose analysis yields the following results:
Voltage Quality Standards - KPI The term voltage quality (or power quality) is an umbrella concept for a variety of disturbances within a power system. The quality of delivere
Q. Why CE configuration is widely used in amplifier circuits? The main ability of an transistor lies in amplifying weak signals. The transistor cannot alone perform this functi
examples problems for decimation in time
thermocouple
Q. The effective area of a dipole is given by A e =0.13λ 2 . Find the effective area of a half-wave dipole at 3 GHz.
Q. A two-winding system has its inductances given by where k 1 and k 2 are constants. Neglecting the winding resistances, derive an expression for the electric force when
Q. An FM station's modulator has a sensitivity k FM = 5π × 10 4 rad/s·V. A receiver uses a discriminator that has a gain constant of 10 -5 /π V·s/rad. Neglecting noise, determin
Q. What do you mean by Phase Sequence? It is standard practice in the United States to designate the phase A-B-C such that under balanced conditions the voltage and current in
The resistance of a 5 m length of wire is 600Ω.Determine: a) the resistance of an 8 m length of the same wire, b) the length of the same wire when the resistance is 420Ω
Safe Conduct : what if a trailing flex became caught up in an apparatus trolley and was cut? Or someone splashed water onto a plug, or concentrated sulphuric acid onto a flex? F
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