TV Camera Tubes

TV camera tubes act as the eye of the television system. It is an electronic device that contains a light-sensitive plate and a scanning system, that can produce an equivalent electrical signal from an optical signal. The light-sensitive plate is also known as the target plate. We know that a picture is usually composed of …

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Travelling Wave Tube (TWT)

A travelling wave tube is a high power amplifier used for the amplification of microwave signals up to a wide range. It is a special type of vacuum tube that offers an operating frequency ranging between 300 MHz to 50 GHz. Travelling wave tubes are non-resonant structures that offer continuous interaction of applied RF field …

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Magnetron

Definition: A magnetron is a device that generates high power electromagnetic wave. It is basically considered as a self-excited microwave oscillator. And is also known as a crossed-field device. The reason behind calling it so is that the electric and magnetic field produced inside the tube are mutually perpendicular to each other thus the two …

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Doppler Effect in Radar

Doppler effect in the radar system is a phenomenon of change in frequency of the transmitted and received signal when the object is not stationary. More specifically we can say, it defines the variation in the frequency of the signal when the object is moving in space. This phenomenon was defined in 1842 by an …

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Radar Range Equation

In the previous lecture, we have discussed the basics of radar and how radar is used for detection and location of an object in space. But the question arises is there any limit which specifies the range up to which this detection is possible? So the answer to this question is yes, there exist some …

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Radar System

Definition: RADAR is an abbreviation for RAdio Detection And Ranging. A system used for detecting and locating the presence of objects like ships, vehicles, aircraft etc. by radiating electromagnetic signal in space is known as the Radar system. Basically, radar is used to collect the information related to the object or target like its range and …

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Semiconductor Memory

Definition: Semiconductor memory is the main memory element of a microcomputer-based system and is used to store program and data. The main memory elements are nothing but semiconductor devices that stores code and information permanently. The semiconductor memory is directly accessible by the microprocessor. And the access time of the data present in the primary …

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Instruction Set of 8086 Microprocessor

We know that instructions are the binary commands used for the execution of any operation. In the previous article, we have discussed the instruction set of the 8085 microprocessor. Here in this article, we will discuss the instruction set supported by the 8086 microprocessor. 8086 supports various instructions including those supported by 8085. However, 8086 …

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8251 USART

8251 USART is a universal synchronous and asynchronous controller designed by Intel basically to facilitate communication. USART stands for Universal Synchronous and Asynchronous Receiver Transmitter and functions as an intermediary that allows serial and parallel communication between the microprocessor and the peripheral devices. We know that microprocessors allow parallel communication. And in parallel communication, the …

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Interrupts in 8085 Microprocessor

Interrupts are the signals that are generally produced by the devices externally connected to the microprocessor, requesting for the services. Whenever an interrupt request is generated in the system then it must not be neglected and be acknowledged as soon as possible. Basically whenever an interrupt is generated then the microprocessor suspends its current execution …

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