X. Pang
... A fan forces air through all these air passages to keep the ferrite and cavity cool. • A 70mm gap between the loop magnet and main magnet. The loop biasing magnet is used for the input impedance matching • RF power is coupled into the cavity by a driving port which is directly tapped to the center c ...
... A fan forces air through all these air passages to keep the ferrite and cavity cool. • A 70mm gap between the loop magnet and main magnet. The loop biasing magnet is used for the input impedance matching • RF power is coupled into the cavity by a driving port which is directly tapped to the center c ...
IC Design for Miniature Implantable Medical Devices
... unique to many MIMD applications. For example, while most industrial ICs require an operating range from -40C to 85C, the critical operating temperature of implantable devices is usually limited to a small range around body temperature (37C). Since most semiconductor device parameters vary with temp ...
... unique to many MIMD applications. For example, while most industrial ICs require an operating range from -40C to 85C, the critical operating temperature of implantable devices is usually limited to a small range around body temperature (37C). Since most semiconductor device parameters vary with temp ...
Hartley oscillator
... determined by a tuned circuit consisting of capacitors and inductors, that is, an LC oscillator. The circuit was invented in 1915 by American engineer Ralph Hartley. The distinguishing feature of the Hartley oscillator is that the tuned circuit consists of a single capacitor in parallel with two ind ...
... determined by a tuned circuit consisting of capacitors and inductors, that is, an LC oscillator. The circuit was invented in 1915 by American engineer Ralph Hartley. The distinguishing feature of the Hartley oscillator is that the tuned circuit consists of a single capacitor in parallel with two ind ...
Household Magnets
... A step step--up transformer increases the voltage for efficient longlong-distance transmission A step step--down transformer decreases the voltage for safe delivery to communities comm nities and homes ...
... A step step--up transformer increases the voltage for efficient longlong-distance transmission A step step--down transformer decreases the voltage for safe delivery to communities comm nities and homes ...
Document
... seen by the driver is equal to impedance of all the connections in parallel. In order to prevent excessive loading, the parallel impedance of all these traces must be much greater than the output impedance of the driver. Drive limitations can crop up even when relatively few branches are used, and ...
... seen by the driver is equal to impedance of all the connections in parallel. In order to prevent excessive loading, the parallel impedance of all these traces must be much greater than the output impedance of the driver. Drive limitations can crop up even when relatively few branches are used, and ...
focusing solenoid for the front end of a linear rf accelerator
... To limit emittance growth in the low energy section of a high current linear ion accelerator, it is desirable to use an axially symmetric focusing system with smooth focusing and a relatively short focusing period. This approach promises a lower particle loss rate than can be achieved by using pairs ...
... To limit emittance growth in the low energy section of a high current linear ion accelerator, it is desirable to use an axially symmetric focusing system with smooth focusing and a relatively short focusing period. This approach promises a lower particle loss rate than can be achieved by using pairs ...
Homework Set 3
... A 13,800/480 V, three-phase, Y- connected transformer bank consists of three identical 100-kVA 7967/480-V transformer. It is supplied with power directly from a large constant-voltage bus. In the short-circuit test, the recorded values on the high-voltage side for one or these transformers are VSC ...
... A 13,800/480 V, three-phase, Y- connected transformer bank consists of three identical 100-kVA 7967/480-V transformer. It is supplied with power directly from a large constant-voltage bus. In the short-circuit test, the recorded values on the high-voltage side for one or these transformers are VSC ...
Resonant inductive coupling
Resonant inductive coupling or electrodynamic induction is the near field wireless transmission of electrical energy between two magnetically coupled coils that are part of resonant circuits tuned to resonate at the same frequency. This process occurs in a resonant transformer, an electrical component which consists of two high Q coils wound on the same core with capacitors connected across the windings to make two coupled LC circuits. Resonant transformers are widely used in radio circuits as bandpass filters, and in switching power supplies. Resonant inductive coupling is also being used in wireless power systems. Here the two LC circuits are in different devices; a transmitter coil in one device transmits electric power across an intervening space to a resonant receiver coil in another device. This technology is being developed for powering and charging portable devices such as cellphones and tablet computers at a distance, without being tethered to an outlet.Resonant transfer works by making a coil ring with an oscillating current. This generates an oscillating magnetic field. Because the coil is highly resonant, any energy placed in the coil dies away relatively slowly over very many cycles; but if a second coil is brought near it, the coil can pick up most of the energy before it is lost, even if it is some distance away. The fields used are predominately non-radiative, near fields (sometimes called evanescent waves), as all hardware is kept well within the 1/4 wavelength distance they radiate little energy from the transmitter to infinity.One of the applications of the resonant transformer is for the CCFL inverter. Another application of the resonant transformer is to couple between stages of a superheterodyne receiver, where the selectivity of the receiver is provided by tuned transformers in the intermediate-frequency amplifiers. The Tesla coil is a resonant transformer circuit used to generate very high voltages, and is able to provide much higher current than high voltage electrostatic machines such as the Van de Graaff generator. Resonant energy transfer is the operating principle behind proposed short range (up to 2 metre) wireless electricity systems such as WiTricity or Rezence and systems that have already been deployed, such as Qi power transfer, passive RFID tags and contactless smart cards.