Interview Questions and Answers

555 IC Timer Interview Questions and Answers: 1. What is 555 timer? Ans. The 555 timer is a highly stable IC that can produce accurate and highly stable time delays or oscillation. The frequency of oscillation and duty cycle are accurately controlled by only two external resistors and a capacitor. 2. What do you mean by […]

Active Filters Interview Questions and Answers: 1. What is meant by ‘frequency response’ of a filter? Ans. A graph of the magnitude of the gain versus frequency is called a frequency response plot. 2. The gain of a filter is a complex number. What is meant by it? Ans. Because at a given frequency, the gain has

Operational Transconductance Amplifier (OTA) Interview Questions and Answers: 1. What is OTA ? Ans. OTA stands for operational transconductance amplifier which is a specially designed single chip voltage input, current output amplifier. 2. Give the applications of OTA. Ans. OTA finds applications in implementing programmable amplifiers and integrators in audio-processing and electronic music synthesis. They are also employed as

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

Regulated and Switching Power Supplies Interview Questions and Answers: 1. What is a regulated power supply? Ans. A regulated power supply is an electronic circuit designed to provide constant dc voltage of predetermined value across load terminals, which is independent of variations in load current, ac mains voltage and temperature. 2. What is practical importance of

Number Systems and Codes Interview Questions and Answers: 1. What is meant by radix (or base) of a number system? Ans. Radix or base of a number system is the number of digits or distinct symbols it uses to represent various numbers. 2. What is meant by LSB and MSB? Ans. The right most bit of a

Logic Gates and Boolean Algebra Interview Questions and Answers: 1. What is Boolean algebra? Ans. Boolean algebra is a mathematical system of logic in which truth functions are expressed as symbols and then these symbols are manipulated to arrive at conclusion. 2. What are the basic logic elements? Ans. Basic logic elements are NOT gate, AND gate,

Logic Circuits Interview Questions and Answers: 1. What is a combinational circuit? Ans. In a combinational circuit, the output depends upon present input(s) only i.e., not dependent on the previous  input(s). The combinational circuit has no memory element. It consists of logic gates only. 2. Write two characteristics of combinational circuits. Ans. The two characteristics of combinational

Digital Logic Families Interview Questions and Answers: 1. What is the difference between a bipolar logic family and unipolar logic family? Ans. Logic family using BJTs is known as bipolar logic family whereas the logic family using unipolar transistors (MOSFETs) is known as unipolar logic family. 2. Differentiate between saturated and non-saturated logic. Ans. The logic circuits,

Digital to Analog and Analog to Digital Converters Interview Questions and Answers: 1. Why conversion of an analog signal into an equivalent digital signal is essential? Ans. Because most sensors have analog output while much data processing is accomplished with digital computers, analog-to­-digital conversion is essential. 2. What is digital-to-analog conversion? Ans. Basically, D/A conversion is the