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Activity P49: Transformer
... change of magnetic flux through the coil (d/dt) and the number of turns (N) in the coil: d N dt Since the rate of change in flux through both coils is the same, the ratio of the emfs (voltages) in the coils should be equal to the ratio of the numbers of turns in the coils: d ...
... change of magnetic flux through the coil (d/dt) and the number of turns (N) in the coil: d N dt Since the rate of change in flux through both coils is the same, the ratio of the emfs (voltages) in the coils should be equal to the ratio of the numbers of turns in the coils: d ...
Built-In Proactive Tuning System for Circuit Aging Resilience
... s526 and s832. First, we augment these circuits with BIPT hardware. To do this, we determine the critical paths in these circuits by using a static timing analyzer written in C. The gate libraries needed for the static timer are characterized in HSPICE for 90nm model card from BPTM [http://www-devic ...
... s526 and s832. First, we augment these circuits with BIPT hardware. To do this, we determine the critical paths in these circuits by using a static timing analyzer written in C. The gate libraries needed for the static timer are characterized in HSPICE for 90nm model card from BPTM [http://www-devic ...
Wide tunable CMOS active inductor
... Fig. 4. The independent tuning of these inductors (using currents I1 and I2) allows one to obtain a circuit with amplitude response similar to that of two coupled resonators with Chebyshev filter characteristics. In an alternative approach, by controlling only VD , one can tune the resonant peak of t ...
... Fig. 4. The independent tuning of these inductors (using currents I1 and I2) allows one to obtain a circuit with amplitude response similar to that of two coupled resonators with Chebyshev filter characteristics. In an alternative approach, by controlling only VD , one can tune the resonant peak of t ...
A Practical Guide to Free-Energy Devices
... Don Smith. One of most impressive developers of free-energy devices is Don Smith who has produced many spectacular devices, generally with major power output. These are a result of his in-depth knowledge and ...
... Don Smith. One of most impressive developers of free-energy devices is Don Smith who has produced many spectacular devices, generally with major power output. These are a result of his in-depth knowledge and ...
experiment 6 - Portal UniMAP
... The Thevenin equivalent method allows you to replace any circuit consisting of independent sources, dependent sources, and resistors with a simple circuit consisting of a single voltage source in series with a single resistor where the simple circuit is equivalent to the original circuit. This means ...
... The Thevenin equivalent method allows you to replace any circuit consisting of independent sources, dependent sources, and resistors with a simple circuit consisting of a single voltage source in series with a single resistor where the simple circuit is equivalent to the original circuit. This means ...
Ch 23 Series and Parallel Circuits
... In your textbook, read about parallel circuits. Refer to the circuit diagram below to answer questions 14–18. Circle the letter of the choice that best answers each ...
... In your textbook, read about parallel circuits. Refer to the circuit diagram below to answer questions 14–18. Circle the letter of the choice that best answers each ...
capacitor
... Capacitors are used for filtering in power supplies. Since capacitors do not pass dc, they are used for dc blocking and ac coupling. For power line decoupling, capacitors are connected between the dc supply and ground, to suppress unwanted voltage spikes that occur on the dc supply voltage due to fa ...
... Capacitors are used for filtering in power supplies. Since capacitors do not pass dc, they are used for dc blocking and ac coupling. For power line decoupling, capacitors are connected between the dc supply and ground, to suppress unwanted voltage spikes that occur on the dc supply voltage due to fa ...
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.