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141 EBI100C Electrical Bio-Impedance Amplifier The EBI100C
141 EBI100C Electrical Bio-Impedance Amplifier The EBI100C

... impedance magnitude and phase simultaneously. Impedance can be recorded at four different measurement frequencies, from 12.5kHz to 100kHz. For operation, the EBI100C connects to four unshielded electrode leads terminating in Touchproof sockets. The EBI100C is typically used with EL500 paired disposa ...
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continuous-time signal
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... • QQQQ data is the historical data for an index fund, whose value tracks the stock price of 100 companies. • Go to http://finance.yahoo.com • Near the top of the page enter QQQQ and click “GO”. • In the left hand column click on “historical prices”. • Click on “Download to Spreadsheet”. • Example 1. ...
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Review for formula, circuit and resistance test
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Figure 8. Circuit board layout for ECC808 (board available from

... metallic enclosure. The valves are heated using a 12.6-V dc voltage. The high voltage must be well smoothed. Suitable circuits have already been presented for the Valve Preamplifier (Elektor Electronics, June through September 2000 issues). Zener diodes D1–D3 must be used if several preamplifiers ar ...
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Regenerative circuit



The regenerative circuit (or regen) allows an electronic signal to be amplified many times by the same active device. It consists of an amplifying vacuum tube or transistor with its output connected to its input through a feedback loop, providing positive feedback. This circuit was widely used in radio receivers, called regenerative receivers, between 1915 and World War II. The regenerative receiver was invented in 1912 and patented in 1914 by American electrical engineer Edwin Armstrong when he was an undergraduate at Columbia University. Due partly to its tendency to radiate interference, by the 1930s the regenerative receiver was superseded by other receiver designs, the TRF and superheterodyne receivers and became obsolete, but regeneration (now called positive feedback) is widely used in other areas of electronics, such as in oscillators and active filters. A receiver circuit that used regeneration in a more complicated way to achieve even higher amplification, the superregenerative receiver, was invented by Armstrong in 1922. It was never widely used in general receivers, but due to its small parts count is used in a few specialized low data rate applications, such as garage door openers, wireless networking devices, walkie-talkies and toys.
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