Image Orthicon is a photoemissive type of camera tube. Photoemission is the basis of its working. This camera tube was invented in the year 1945 by Radio Corporation of America. Photocathode acts as a primary element in the operation of image orthicon. This is so because photocathode allows the emission of electrons from its surface …
Definition: A Vidicon is a type of camera tube whose basis of working is photoconductivity. Basically it changes optical energy into electrical energy by the variation in resistance of the material with respect to the illumination. These camera tubes were invented in the 50s. The tube length is around 12 to 20 cm with a …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …