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p21xxcsr-evb
... P21XXPowerharvester®Chipset Reference Design Evaluation Board Typical Operation The harvester circuit converts RF energy within the appropriate frequency band into DC power. This is monitored by one of three voltage detectors. The user selects 1.2V, 0.9V or 0.7V as the threshold voltage via JP3, JP4 ...
... P21XXPowerharvester®Chipset Reference Design Evaluation Board Typical Operation The harvester circuit converts RF energy within the appropriate frequency band into DC power. This is monitored by one of three voltage detectors. The user selects 1.2V, 0.9V or 0.7V as the threshold voltage via JP3, JP4 ...
Capacitors in DC Circuits
... Substitute the value for I from the second equation into the first: R Vc = Vm(R + 1) m ...
... Substitute the value for I from the second equation into the first: R Vc = Vm(R + 1) m ...
LAB 12 AC Circuits
... Part 1: Frequency Response of a Resistor a. Construct a circuit consisting of a 4.7k resistor and the decade resistor set to 500 in series with a function generator. The decade resistor will serve as the “sensing” resistor used to measure the current through the circuit. Use a DMM to measure the ...
... Part 1: Frequency Response of a Resistor a. Construct a circuit consisting of a 4.7k resistor and the decade resistor set to 500 in series with a function generator. The decade resistor will serve as the “sensing” resistor used to measure the current through the circuit. Use a DMM to measure the ...
EE2003 Circuit Theory
... y We can derive the differential equations for the following circuit, then transform it in the phasor domain, solve for Vo, then transform back in the time domain to find vo(t). However, the derivation may sometimes be very tedious ...
... y We can derive the differential equations for the following circuit, then transform it in the phasor domain, solve for Vo, then transform back in the time domain to find vo(t). However, the derivation may sometimes be very tedious ...
Diode Characteristics EELE101 Laboratory
... has negative charge carriers available for charge transport, and the P-type semiconductor has positive charge carriers available for transport. (Positive charges don’t really move in the material, they only appear to since the electrons tend to fall into the holes and consequently move backwards rel ...
... has negative charge carriers available for charge transport, and the P-type semiconductor has positive charge carriers available for transport. (Positive charges don’t really move in the material, they only appear to since the electrons tend to fall into the holes and consequently move backwards rel ...
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.