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Phase Frequency Detector Principles
Phase Frequency Detector Principles

MAX1471 315MHz/434MHz Low-Power, 3V/5V ASK/FSK Superheterodyne Receiver General Description
MAX1471 315MHz/434MHz Low-Power, 3V/5V ASK/FSK Superheterodyne Receiver General Description

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IOSR Journal of VLSI and Signal Processing (IOSR-JVSP)
IOSR Journal of VLSI and Signal Processing (IOSR-JVSP)

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P. Cantillon-Murphy, T.C. Neugebauer, C. Brasca, and D.J. Perreault, “An Active Ripple Filtering Technique for Improving Common-Mode Inductor Performance,” IEEE Power Electronics Letters , Vol. 2, No. 2, June 2004, pp. 45-50.
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... The choke should be capable of carrying a dc current of 20 A with a ripple voltage whose amplitude does not exceed 50 mV. It should present a common-mode impedance of greater than 1 to the windshield antenna over the entire AM range. This requires a minimum common-mode inductance of 1 mH, in order t ...
Chapter 17 - La Sierra University
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Latch-Up,ESD,And Other Phenomena
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... result, the charge carriers injected into one of the two transistors is diverted largely via these auxiliary collectors to the positive or negative supply-voltage connection. These precautions do not completely eliminate the questionable thyristor. However, the thyristor’s sensitivity is reduced to ...
HighSpeed PWM Controller (Rev. D)
HighSpeed PWM Controller (Rev. D)

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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 Due partly to its tendency to radiate interference, by the 1930s the regenerative receiver was superseded by other receiver designs, the TRF and superheterodyne receivers and became obsolete, but regeneration (now called positive feedback) is widely used in other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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