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The generator of AM EMFs consists of a battery-driven radiofrequency (RF) EMF generator connected to a 1.5 m long 50 ? coaxial cable, to the other end of which a stainless-steel spoon-shaped mouthpiece is connected via an impedance transformer. The RF source of the device corresponds to a class C amplifier operating at 27.12 MHz. The carrier frequency is AM with a modulation depth of 85±5%, whereas the modulation frequency is generated by a digital direct synthesiser with a resolution of 10-7. The treatment sequence is controlled by a microcontroller (Atmel AT89S8252, Fribourg, Switzerland), that is, duration of session, sequence of modulation frequencies and duration of each sequence can be programmed via PC over a RS232 interface. The RF output is adjusted to 100 mW into a 50 ? load, which results in an emitting power identical to that of the device used for the treatment of insomnia.
Q. What do you mean by Double Word? A double word is precisely what its name implies, two words. Thus, a double word quantity is 32 bits. Logically, this double word can be div
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Explain the Synchronous Up-Down Counters? The circuit of a 3-bit synchronous up-down counter and a table of its sequence are shown below. Alike to an asynchronous up-down count
It has been known for a thousand years or more (originating in China) that certain (magnetic) materials would always orientate themselves in a particular direction if suspended
what is the theory for full wave rectifier with c filter
Q. Illustrate working of Application Layer? As the highest layer in OSI reference model, application layer provides services to users of OSI environment. Layer
For the amplifier circuit shown below estimate the mid band voltage gain if the EARLY voltage (V A ) of the current mirror transistors is 80 volts. Assume the d.c biasing is optim
Can you explain working principle of TL/AC alternator? Ans . The core of the stator which is completely induced by the field coils, will get a residual magnetism if excited b
Q. Planning and Research in power system? Energy research worldwide is assuming top priority, in particular because of economic, en - vironmental, and resource constraints. DOE
Application of Microprocessors Microprocessor microcontroller based systems may be used in almost every filed of life and their applications are increasing day by day
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