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Q. What are transistor amplifiers? What is meant by efficiency of an amplifier? What is amplifier coupling?
The AMPLIFIER is a device that enables an input signal to control an output signal. The output signal will have some (or all) of the characteristics of the input signal but will generally be larger than the input signal in terms of voltage, current, or power. A transistor amplifier is a current-control device. The current in the base of the transistor (which is dependent on the emitter-base bias) controls the current in the collector.
Once current is controlled it can be used to give a voltage gain or a power gain. The efficiency of an amplifier refers to the amount of power delivered to the output compared to the power supplied to the circuit. Since every device takes power to operate, if the amplifier operates for 360° of input signal, it uses more power than if it only operates for 180° of input signal. If the amplifier uses more power, less power is available for the output signal and efficiency is lower. Since class A amplifiers operate (have current flow) for 360° of input signal, they are low in efficiency.
Q. Show Proper cash management? Proper cash management: cash management is a important task of finance management he has to access to various cash needs at the difference time
L filters: An L filter contains two reactive elements that are one in series and one in parallel. T and π filters: Main article: Capacitor-input filter
Q. A shift register can be used as a binary (a) divide by-2, and (b) multiply-by-2 counter. Explain. Show a block diagram of a 4-bit shift-right register using JKFFs.
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Q. Methods for speed and torque control of induction motors? The following are methods available for speed and torque control of induction motors. • Pole-changing method
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Q. Use a 4-to-1multiplexer to simulate the following: (a) NAND logic function. (b) EXCLUSIVE-OR logic function. (c) Σ m (1, 2, 4).
Impurities in Semiconductors Can be added in accurately controlled amounts. Can modify the electronic and optical properties. Used to change conductivity over wide ra
Q. What do you understand by progressive control? Progressive Control: Step by step system is an example of progressive control. The connection is set up in stages, in response
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