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Starting from the very simple remote operation to the highly sophisticated satellites, robots and AI, ECE has its influence in every possible arena. As discussed above, an ECE graduate is presented with an array of career paths to pursue based in his interest right after graduation. Some major avenues are in the sectors of manufacturing industries and service organizations such as broadcasting, consulting, data communication, entertainment, research and development as well as system support.
Based on his personal choice and a logical understanding of the future scope of a field, the graduate can jump right ahead into one of these highly creative and interesting fields. Alongside the corporate firms that hire ECE graduates, there are a significant number of public sector undertakings that are highly interested in hiring these graduates.
The interviews conducted by these companies that hire ECE graduates mainly look for the intellectual ability and inter personal skills in a student, the former overweighing the latter to a significant level.
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. Explain Full duplex and half duplex.
Full duplex refers to the transmission of data in two directions simultaneously. For example, a telephone is a full-duplex devicebecause both parties can talk at once.
In contrast, a walkie-talkie is ahalf-duplex device because only one party can transmit at a time. Most modems have a switch that lets you choose between full-duplex and half-duplex modes.
The choice depends on whichcommunications program you are running. In full-duplex mode, data you transmit does not appear on yourscreen until it has been received and sent back by the other party.
This enables you to validate that the data has been accurately transmitted.
If your display screen shows two of each character, it probably means that your modem is set to half-duplex mode when it should be in full-duplex mode. 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: Negative feedback: This tends to reduce output but in amplifiers, stabilizes and linearizes operation. Positive feedback: This tends to increase output. In contrast, a system that responds to the perturbation in the opposite direction is called a negative feedback system.
Bipolar feedback: which can either increase or decrease output. 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 a transducer and transponder? A transducer is a device, usually electrical, electronic, electro-mechanical, electromagnetic, photonic, or photovoltaic that converts one type of energy or physical attribute to another for various purposes including measurement or information transfer.
An automatic device that transmits a predetermined messagein response to a predefined received signal. A receiver-transmitter that will generate a reply signal upon proper electronic interrogation.
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 a rectifier? A rectifier changes alternating current into direct current. This process is called rectification.
The three main types of rectifier are the half-wave, full-wave, and bridge. A rectifier is the opposite of an inverter, which changes direct current into alternating current. HWR- The simplest type is the half-wave rectifier, which can be made with just one diode.
When the voltage of the alternating current is positive, the diode becomes forward-biased and current flows through it. When the voltage is negative, the diode is reverse-biased and the current stops.
The result is a clipped copy of the alternating current waveform with only positive voltage, and an average voltage that is one third of the peak input voltage. This pulsating direct current is adequate for some components, but others require a more steady current. This requires a full-wave rectifier that can convert both parts of the cycle to positive voltage.
FWR- The full-wave rectifier is essentially two half-wave rectifiers, and can be made with two diodes and an earthed centre tap on the transformer.
The positive voltage half of the cycle flows through one diode, and the negative half flows through the other.
The centre tap allows the circuit to be completed because current cannot flow through the other diode. The result is still a pulsating direct current but with just over half the input peak voltage, and double the frequency.
What is resistor? What is capacitor? Capacitors are often used in electric and electronic circuits asenergy-storage devices. They can also be used to differentiate between high-frequency and low-frequency signals. This property makes them useful in electronic filters. March February Team Interview. Interview Preparation. Basics of Interviews. Common Interview Questions.
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