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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.The phase shift circuit or the feedback network consists of three identical RC sections. Each RC section produces a phase shift of 600 .Therefore the net phase shift of the feedback network is 600 *3=1800 . The transistor amplifier produces a phase shift of 1800 .The total phase shift between the input and the output circuit is 3600 or 00 .Hence the feedback is positive. The circuit is set into oscillations by any random or variation caused in the base current, that may be either due to noise inherent in the transistor or minor variation in voltage of DC power supply. This variation in base current is amplified in the collector circuit. The output of the amplifier is supplied to an RC feedback network.
Consider the circuit of Figure (a) with v S (t) = 10 cos ωt. Use the piecewise-linear model of the diode with a threshold voltage of 0.6 V and a forward resistance of 0.5 to dete
Write an assembly language program to determine one's complement and two's complement of an 8-bit number. Ans One's complement of an 8-bit number LDA 2501H CMA STA
Q. Define wireless communications? The latest wireless communications technology is the personal satellite phone. The coverage is planetary and one can reach anywhere on earth.
What are usue and all the details of 8051 microcontroller with its block diagram pin diagram and all other details
Q. In an RLC series circuit excited by a voltage source v(t), for R = 10 , L = 1 H, and C = 0.1F, determine v(t) if the capacitor voltage vC(t) = 5e -10t V.
What do you mean by pipelining in an 8086 processor? The computer is composed of two kinds that operate asynchronously single part called a BIU in the 8086,fetches instruction
Design 2-bit bidirectional shift register? ## A list of ten 8-bit numbers is located at address $5000. Write a 68000 Assembly program (flowchart and code) to sort those numbe
complement method of binary subtraction This method is used for subtraction as subtraction is converted to addition. Use following steps to perform subtraction ;
Q. Find idealized expressions for the active and ohmic states and sketch the universal characteristics of an n-channel enhancement MOSFET operated below breakdown.
Detection and Handling of Gas Leakage : If you are using a toxic gas or have a store for it you must have some devices to indicate the leakage, if any. Though numerous monitoring
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