In this way, a single frequency can support multiple, simultaneous data channels. What is an Amplifier? An electronic device or electrical circuit that is used to boost amplify the power, voltage or current of an applied signal. What is Barkhausen criteria? Barkhausen criteria, without which you will not know which conditions, are to be satisfied for oscillations. What is a feedback? And explain different types of feedback. Feedback is a process whereby some proportion of the output signal of a system is passed fed back to the input.
This is often used to control the dynamic behaviour of the system. Types of feedback:. Advantages of negative feedback over positive feedback. Much attention has been given by researchers to negative feedback processes, because negative feedback processes lead systems towards equilibrium states. Positive feedback reinforces a given tendency of a system and can lead a system away from equilibrium states, possibly causing quite unexpected results. Example for negative feedback and positive feedback.
What is Oscillator? An oscillator is a circuit that creates a waveform output from a direct current input. The two main types of oscillator are harmonic and relaxation. The harmonic oscillators have smooth curved waveforms, while relaxation oscillators have waveforms with sharp changes. What is an Integrated Circuit? An integrated circuit IC , also called a microchip, is an electronic circuit etched onto a silicon chip.
Their main advantages are low cost, low power, high performance, and very small size. What is crosstalk? Crosstalk is a form of interference caused by signals in nearby conductors. The most common example is hearing an unwanted conversation on the telephone. Crosstalk can also occur in radios, televisions, networking equipment, and even electric guitars. What is resistor? What is inductor? An inductor is a passive electrical device employed in electrical circuits for its property of inductance.
An inductor can take many forms. What is conductor? A substance, body, or device that readily conducts heat, electricity, sound, etc. Copper is a good conductor of electricity. What is a semi conductor? A semiconductor is a solid material that has electrical conductivity in between that of a conductor and that of an insulator An Insulator is a material that resists the flow of electric current. It is an object intended to support or separate electrical conductors without passing current through itself ; it can vary over that wide range either permanently or dynamically.
What is diode? In electronics, a diode is a two-terminal device. Diodes have two active electrodes between which the signal of interest may flow, and most are used for their unidirectional current property.
What is transistor? In electronics, a transistor is a semiconductor device commonly used to amplify or switch electronic signals. The transistor is the fundamental building block of computers, and all other modernelectronic devices. Some transistors are packaged individually but most are found in integrated circuits. What is op-amp? An operational amplifier, often called an op-amp , is a DC-coupledhigh-gain electronic voltage amplifier with differential inputs[1] and, usually, a single output.
Typically the output of the op-amp is controlled either by negative feedback, which largely determines the magnitude of its output voltage gain, or by positive feedback, which facilitates regenerative gain and oscillation.
What is cut-off frequency? The frequency at which the response is -3dB with respect to the maximum response. What are the main divisions of power system? The generating system,transmission system,and distribution system. What is Instrumentation Amplifier IA and what are all the advantages?
An instrumentation amplifier is a differential op-amp circuit providing high input impedances with ease of gain adjustment by varying a single resistor. What is meant by impedance diagram. The equivalent circuit of all the components of the power system are drawn and they are interconnected is called impedance diagram.
What is the need for load flow study. The load flow study of a power system is essential to decide the best operation existing system and for planning the future expansion of the system. It is also essential for designing the power system. What is the need for base values?
The components of power system may operate at different voltage and power levels. It will be convenient for analysis of power system if the voltage, power, current ratings of the components of the power system is expressed with reference to a common value called base value.
Your email address will not be published. Expand ECE? Examples: are incandescent lights, heaters, fridge, stove, etc… 7. ECE Interview Questions 8. Market demand is another factor affecting the decision of operators regarding which services to offer first.
Ans: Passband is the range of frequencies or wavelengths that can pass through a filter without being attenuated. Ans: analog filters n digital filters not sure what u meant. Ans: Once the signal is coded, modulated and then sent, the receiver must demodulate the signal.
This is usually done in two steps: Spectrum spreading e. The remaining information bearing signal is demodulated by multiplying with a local reference identical in structure and synchronized with received signal. Ans: Microwave essentially means very short wave.
The main reason why we have to go in for microwave frequency for communication is that lower frequency band are congested and demand for point to point communication continue to increase. The propagation of the microwave takes place in spacewave in v. Ans: Response given by a digital system when impulse signal is applied to it. Used to find out stability of system. Ans: To be usable for direct sequence spreading, a PN code must meet the following conditions:.
The propagation of the microwave takes place in spacewave in view of high gain and directivity in the form of a bean and is similar to that of light. Ans: Half-duplex: either sender or receiver can use the channel at one time eg walky-talky and full-duplex: sender or receiver or both can use the channel at one time eg telephone. We help you to choose the right Python career Path at myTectra. Here are the top courses in Python one can select. Digital Marketing Leadership Program.
Finance Accounting. Human Resources. Customer Service. Sales and Marketing. Trends, tips and tricks from myTectra Experts. Interview Questions. Helps crack your upcoming job interview. Helps Deep connection with our video content. Get access to all the latest tutorials and learn free. Electrical Wave Filters 7. BJT Amplifiers. Electronic Meters. Logic Circuits. Integrated Circuits Operational Amplifiers Sir I want to improve my basic general knowledge in electronics and communication so …send me some vedios regarding about …it.
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