Mutual Inductance
Figure 1 above is used to demonstrate electromagnetic induction (mutual inductance). In this arrangement, relative motion between the magnetic line…
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Inductance
Inductance is an electric circuit property which depends on the interaction of magnetic field with electric circuits. This phenomenon is…
Electric field of a parallel plate capacitor
A parallel plate capacitor is a device that consist of two oppositely charge conducting plates separated by a small distance,…
Horizontal Resolution and Video Bandwidth of a Television System
The horizontal resolution of a television system is the ability of the scanning system to resolve the horizontal details, i.e….
The Kell Factor
In a practical scanning system, the maximum vertical resolution obtainable is less than the active number of lines available for…
Vertical Resolution in a Television System
The ability of a scanning system to resolve vertical details in a scene depends upon the number of scanning lines…
Persistence of Vision and Flicker in Television Systems
The image formed on the retina is always retained on it for a short period. This is because the brightness…
Aspect Ratio and Rectangular Scanning of Television
Subjective tests have indicated that best viewing comfort, panoramic effect and artistic appreciation are obtained when the picture raster has…
Picture Contrast and Tonal Gradations in Television
In nature the range of brightness level is very large, almost infinite from pitch darkness of a closed cave to…
Brightness Perception and Photometric Quantities in TV Camera Photography.
Visible light is the range of the electromagnetic spectrum of radiant energy that can be perceived by the human eye….
Transmission and Reception of Video Signals
The camera video signal is amplified and mixed with sync and blanking pulses and transmitted to the receiving end over…
Video Signal
The time varying electrical signal voltage obtained from the TV camera tube circuit representing the special distribution of brightness information…
Solid State Image Sensor
The most recent that is poised to get rid of the TV camera ‘tube’ and the electron beam scanning is…
What is an Iconoscope?
This was one of the first electronic pick-up tubes developed by Zworykin in the late 20s for use in the…
Photoelectric Conversion of Camera Pick-up Devices
The photosensitive target plate converts the variations in the intensity of light into variation in electrical signals utilising: (i) a…
Advertise on our Website
Place your business message in front of the world! We offer effective, very low cost website advertising solutions that enable…
Camera Pick-up Devices of a Television.
The scene or the picture to be televised is focused with the help of a lens system onto a photosensitive…
The Scanning Process of a Television
The scanning technique of a television is a process similar to the reading of written information on a page; starting…
Sound and Picture Transmission in Television
In television, the basic problem is to devise a system by which one can transmit both sound and picture and…
Electric Circuits and Network Theorems
There are certain theorems, which when applied to the solutions of electric networks, either simplify the network itself or render…
Example 2 (Worked Example on Relative Potential)
In figure 6 below, compute the relative potentials of points A, B, C, D and E when (i) Point A…
Example 1 (Worked Example on Relative Potential)
In figure 5 below, calculate the values of (i) VAF (ii)VEA and (iii)VFB Solution It should be noted that…
Relative Potential
Relative potential is the voltage of one point in a circuit with respect to that at another point (usually called…
Duality between Series and Parallel Circuits.
There are certain peculiar pattern of relationship between series and parallel circuits. For example, in a series circuit, current is…
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