Beat Frequency Oscillator (BFO) | Block Diagram | Working and Limitations: In this Beat Frequency Oscillator, the outputs of two RF oscillators are applied to a square law detector and the resulting difference frequency is amplified. The main advantage of this type of oscillator is that a stable continuous output covering the entire AF range […]
Beat Frequency Oscillator (BFO) Read More »
Block Diagram of Sweep Generator: Block Diagram of Sweep Generator – It provides a sinusoidal output voltage whose frequency varies smoothly and continuously over an entire frequency band, usually at an audio rate. The process of frequency modulation may be accomplished electronically or mechanically. It is done electronically by using the modulating voltage to vary
Block Diagram of Sweep Generator Read More »
Modern Laboratory Signal Generator Block Diagram and its Working: Modern Laboratory Signal Generator – To improve the frequency stability, a single master oscillator is optimally designed for the highest frequency range and frequency dividers are switched in to produce lower ranges. In this manner the stability of the top range is imparted to all the
Modern Laboratory Signal Generator Block Diagram and its Working Read More »
Continuous Balance DVM: Continuous Balance DVM – The basic block diagram of a servo balancing potentiometer type DVM is shown in Fig. 5.15. The input voltage is applied to one side of a mechanical chopper comparator, the other side being connected to the variable arm of a precision potentiometer. The output of the chopper comparator,
Continuous Balance DVM Read More »
DC Meter: The most commonly used dc meter is based on the fundamental principle of the motor. The motor action is produced by the flow of a small amount of current through a moving coil which is positioned in a permanent magnetic field. This basic moving system, often called the D’Arsonval movement, is also referred
Classification of Printers: Classification of Printers – Character printers and graphic plotters are the two devices used to prepare a permanent (or hard copy) record of computer output. The basic difference between printers and plotters is that the former are devices whose purpose is to print letters, numbers and similar characters in text-readable form, while
Classification of Printers Read More »
5×7 Dot Matrix Led Display Character Patterns: Excellent alphanumeric characters can be displayed by using dot matrix LEDs with an LED at each dot location. Commonly used Dot Matrix Displays of prominent characters are 5 x 7, 5 x 8, and 7 x 9, of which 5×7 Dot Matrix Led Display Character Patterns shown in
5×7 Dot Matrix Led Display Character Patterns Read More »
Gas Discharge Plasma Display | Nixie Tubes – Symbolic Representation: Gas Discharge Plasma Display – These are the most well-known type of alphanumeric Plasma Display. Their operation is based on the emission of light in a cold cathode gas filled tube under breakdown condition. These cold cathode numerical indicators are called Nixies (Numicators and Numbertrons).
Gas Discharge Plasma Display Read More »
Working Principle of D Arsonval Galvanometer: The action of the most commonly dc meter is based on the fundamental principle of the motor. The motor action is produced by the flow of a small current through a moving coil, which is positioned in the field of a permanent magnet. This basic moving coil system is
Working Principle of D Arsonval Galvanometer Read More »
Voltage Stability Analysis: The voltage stability analysis for a given system state involves examining following two aspects. Proximity to voltage instability: Distance to instability may be measured in terms of physical quantities, such as load level, real power flow through a critical interface, and reactive power reserve. Possible contingencies, such as a line outage, loss
Voltage Stability Analysis Read More »
