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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.
determine the efficience of a 16 KVA transformer for the full-load,unit power factor
For Sign Flag CP ( Call on plus ) CM (Call on minus ) Instruction CP call the subroutine from the specified memory location if sign flag is not set or reset( S=0)
need help on 2330 level 2 motors assignment
TDMA: Time division multiple access (TDMA) is a channel access method for shared medium (generally radio) networks. It permits several users to share the similar frequency chan
Q. Show Maximum Differential Input Voltage of amplifier? This is the maximum value of differential input voltage v p - v n that can be applied without damaging the op amp.
Collector-to-base bias: Figure: Collector-to-base bias This configuration uses negative feedback to avoid thermal runaway and stabilize the operating point. In th
What are the functions of bus interface unit (BIU) in 8086? (a) Get instructions from memory. (b) Get data from memory and I/O ports. (c) Write data to memory and I/O por
a dc generator has 300 turns in each field coil. the flux per pol is 0.1 wb. find the average value of EMF inducet in field winding in the flux decays to zero in 0.3 second?
Define a voltmeter A voltmeter is an instrument used to measure p.d. and must be linked in parallel with the part of the circuit whose p.d. is required.
Q. What do you mean by Sequential Blocks? Neglecting propagation delays, which are measures of how long it takes the output of a gate to respond to a transition at the input of
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