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Q. Discuss the operation of a transistorized phase shift oscillator with the help of a diagram? Explain the phase shifting circuit?
An oscillator is a circuit which converts electric energy at d.c (zero frequency ) to electric energy at frequency varying from a few hertz to gigahertz . Stated simply , it is a source of alternating voltage or current . An electronic oscillator is, essentially, a feedback amplifier that supplies its own input i.e, it requires not external signal to initiate or maintain the energy conversion process.
The voltage divider R1 - R2 provides DC emitter base bias, Re and Ce configuration provides temperature stability and prevent AC signal degeneration and collector resistor Rc controls the collector voltage. The oscillator output voltage is capacitively coupled to the load by Cc.
A 3 phase 400 volt(line to line) wye connected synchronous motor has Xs= 1 ohm per phase and a negligible armature resistance. The field current is so adjusted that the internal(in
history of engineering economices
Parity flag - Registers If after any arithmetical or logical operation if number of the accumulator are even parity flag (P) is set otherwise reset.
a) State the principle of working of transformer. b) A 230/110 V, single-phase transformer takes an input of 350 volt-amperes at no load while working at rated voltage. The core
Q. Classify switching systems. In what way is stored program control superior to hard wired control? Ans: Classifications of switching systems are givenin block diagram belo
Q. Explain working of three-phase transformers? Transformation in three-phase systems can be accomplished in either of two ways: (1) connecting three identical single-phase tra
draw a developed single simplex wave winding havig 17 number of coils and 4 number of poles
Define the term embedded system according to Wayne Wolf and Todd. According to Wayne Wolf: This is any device which includes a programmable computer but is not itself intend
Q. Explain with the help of a circuit diagram,the operation of COLPITTS OSCILLATOR. Oscillator is a circuit used to generate a.c voltage without a.c.input signal.The energy to
Q. What is meant by regulation? The output of most power supplies should be a constant voltage. Unfortunately, this is difficult to achieve. There are two factors that can caus
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