automatic frequency control circuit (AFC circuit)

automatic frequency control circuit (AFC circuit): Макаров: схема автоматической подстройки частоты (схема АПЧ), схема АПЧ (схема автоматической подстройки частоты)

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Automatic frequency control — (AFC) is a method (or device) to automatically maintain a tuning of electromagnetic radiation (radio or microwave) signal to desired frequency. Assuming that a receiver is nearly tuned to the desired frequency, a circuit in the receiver develops… … Wikipedia
Frequency synthesizer — A frequency synthesizer is an electronic system for generating any of a range of frequencies from a single fixed timebase or oscillator. They are found in many modern devices, including radio receivers, mobile telephones, radiotelephones, walkie… … Wikipedia
AZUSA — refers to a ground based radar tracking system installed at Cape Canaveral, Florida and the NASA Kennedy Space Center. AZUSA dated back to the early 1950s and was named after the southern California town (Azusa, California) where the system was… … Wikipedia
Glossary of fuel cell terms — The Glossary of fuel cell terms lists the definitions of many terms used within the fuel cell industry. The terms in this glossary may be used by fuel cell industry associations, in education material and fuel cell codes and standards to name but … Wikipedia
Beijing Subway — Infobox Public transit name = Beijing Subway imagesize = 250px locale = Beijing transit type = rapid transit began operation = 1969 ended operation = system length = km to mi|200|abbr=yes|precision=0 lines = 8 vehicles = stations = 123 (stations… … Wikipedia

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