Nonlinear Circuits Interview Questions and Answers: 1. What is a comparator and where is it used ? Ans. A comparator is essentially an op-amp operated in open-loop configuration. The output signal is either a high or low saturated voltage. It is used in digital interfacing, Schmitt triggers, analog-to-digital converters, oscillators etc. 2. What are the limitations […]
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Digitally Controlled Frequency Synthesizers Interview Questions and Answers: 1. What is PLL? Ans. PLL is basically an electronic circuit that consists of a phase detector, a low-pass filter, a dc amplifier and a voltage controlled oscillator connected,. 2. What are the basic building blocks of a PLL? Ans. The basic building blocks of a PLL are phase
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Electronic Instruments (Analog as well as Digital) Interview Questions and Answers: 1. Why ordinary voltmeter cannot be used in electronic circuits? Ans. A moving coil voltmeter draws a large current, hence a large power from the test circuit during measurement. Generally current drawn by the voltmeter does not make much difference in electrical circuit but when
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Electronics Engineering: AC Regulator – Definition and Classification Active and Passive Satellite Adjustable Voltage Regulators Advantages and Disadvantages of Digital Communication Advantages and Disadvantages of JFET Advantages of Negative Feedback Amplifier Amplitude Detection Process Analog Storage Oscilloscope Block Diagram and Its Workings Applications of FETs (Field Effect Transistors) Astable Multivibrator – Definition and Types Avalanche
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Inverter – Definition and Classification of Inverters: A device that converts dc power into ac power at desired output voltage and frequency is known as an inverter. Some industrial applications of inverters are for adjustable-speed ac drives, induction heating, standby aircraft power supplies. The dc power input to the inverter may be battery, fuel cells,
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Step Down Chopper with RLE Load Working Principle: The choppers are widely employed for speed control of dc motors in industrial and traction drives. Figure 27.30 (a) shows the basic Step Down Chopper with RLE Load for the control of a dc series motor. The Step Down Chopper with RLE Load is shown to consist
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Single Phase Half Wave Controlled Rectifier with Resistive Load and Inductive Load: In a Single Phase Half Wave Controlled Rectifier only one SCR is used in the circuit. It is included in between the ac source the load. The transformer is used on the supply side in order to change the voltage level to suit the
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What is Oscillator? – Types of Oscillators: An oscillator is the basic element of all ac signal sources and generates sinusoidal signals of known frequency and amplitude. It is one of the basic and useful instruments used in electrical and electronic measurements. For example, an oscillator finds wide applications in electronic communication equipment. In AM
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Facsimile (FAX) Machine – Definition, Operation and Applications: In addition to the basic signals consisting of speech, music, or telegraph codes, a telecommunications system is often required to transmit signals from a source of a visual nature. Facsimile (commonly called FAX) means an exact reproduction, and in facsimile transmission an exact reproduction of a document
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What is Comparator in Electronics? – Classification and Applications A circuit used to mark the instant when an arbitrary waveform attains some particular reference level is called a comparator. The clipping circuits can also be used to perform the operation of comparison. In this case the circuits become elements of a comparison system. The only
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