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Types Of Electrical Circuits
... from only having one path for the charges to move along. Charges must move in "series" first going to one resistor then the next. If one of the items in the circuit is broken then no charge will move through the circuit because there is only one path. There is no alternative route Parallel Circuit: ...
... from only having one path for the charges to move along. Charges must move in "series" first going to one resistor then the next. If one of the items in the circuit is broken then no charge will move through the circuit because there is only one path. There is no alternative route Parallel Circuit: ...
Electronics Engineering Exercise 1
... (D) The closed‐loop system is unstable for sufficiently large and positive k? ...
... (D) The closed‐loop system is unstable for sufficiently large and positive k? ...
Simple and Robust Equivalent Circuit of Real Transformer
... become important parts of the electrical circuits. Modern core materials have low loss. Since the core exhibits nonlinearity and hysteresis, this economical effect, on the other hand, increase the number and amplitude of harmonics, which can lead to problems with electromagnetic compatibility. There ...
... become important parts of the electrical circuits. Modern core materials have low loss. Since the core exhibits nonlinearity and hysteresis, this economical effect, on the other hand, increase the number and amplitude of harmonics, which can lead to problems with electromagnetic compatibility. There ...
EMC Components and Filters
... These strays can be applied to any filter The resultant circuit can become very ...
... These strays can be applied to any filter The resultant circuit can become very ...
Transmitters-1 - Chelmsford Amateur Radio Society
... Important to use stable components/PSUs, sound construction, and temperature compensation ...
... Important to use stable components/PSUs, sound construction, and temperature compensation ...
Linear Circuit Elements
... But, the unfortunate reality is that the “wire” exhibits inductance, and likewise a capacitance between it and the ground plane: ...
... But, the unfortunate reality is that the “wire” exhibits inductance, and likewise a capacitance between it and the ground plane: ...
r.f. INSTRUMENTATION, MEASUREMENT TECHNIQUES AND SAMPLE PREPARATION Chapter 2
... For the present work we have built a marginal oscillator [13] whose circuit diagram is shown in the Fig. 1. The present circuit is different from that of the marginal oscillators [14-17] which are of Colpitts type and has two controls for feedback and emitter current, while the other circuits have o ...
... For the present work we have built a marginal oscillator [13] whose circuit diagram is shown in the Fig. 1. The present circuit is different from that of the marginal oscillators [14-17] which are of Colpitts type and has two controls for feedback and emitter current, while the other circuits have o ...
G3A01 What is the sunspot number?
... horizontal and vertical channel amplifiers? A. An ohmmeter B. A signal generator C. An ammeter D. An oscilloscope ...
... horizontal and vertical channel amplifiers? A. An ohmmeter B. A signal generator C. An ammeter D. An oscilloscope ...
Crystal radio
A crystal radio receiver, also called a crystal set or cat's whisker receiver, is a very simple radio receiver, popular in the early days of radio. It needs no other power source but that received solely from the power of radio waves received by a wire antenna. It gets its name from its most important component, known as a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode.Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of copper wire for adjustment, a capacitor, a crystal detector, and earphones. They are distinct from ordinary radios as they are passive receivers, while other radios use a separate source of electric power such as a battery or the mains power to amplify the weak radio signal so as to make it louder. Thus, crystal sets produce rather weak sound and must be listened to with sensitive earphones, and can only receive stations within a limited range.The rectifying property of crystals was discovered in 1874 by Karl Ferdinand Braun, and crystal detectors were developed and applied to radio receivers in 1904 by Jagadish Chandra Bose, G. W. Pickard and others.Crystal radios were the first widely used type of radio receiver, and the main type used during the wireless telegraphy era. Sold and homemade by the millions, the inexpensive and reliable crystal radio was a major driving force in the introduction of radio to the public, contributing to the development of radio as an entertainment medium around 1920.After about 1920, crystal sets were superseded by the first amplifying receivers, which used vacuum tubes (Audions), and became obsolete for commercial use. They, however, continued to be built by hobbyists, youth groups, and the Boy Scouts as a way of learning about the technology of radio. Today they are still sold as educational devices, and there are groups of enthusiasts devoted to their construction who hold competitions comparing the performance of their home-built designs.Crystal radios receive amplitude modulated (AM) signals, and can be designed to receive almost any radio frequency band, but most receive the AM broadcast band. A few receive shortwave bands, but strong signals are required. The first crystal sets received wireless telegraphy signals broadcast by spark-gap transmitters at frequencies as low as 20 kHz.