PURPOSE:To prevent the deterioration in sound quality at AM receiving, by controlling a deemphasis circuit in response to a switching means for switching a power supply voltage to both AM and FM receivers. CONSTITUTION:A changeover switch 10 switches the voltage of a DC power supply 9 to a ...
Digital tuning system approaches to AM-FM broadcast receivers are becoming increasingly popular as manufacturers are finding lower component costs and incr... TB Mills - 《IEEE Transactions on Consumer Electronics》 被引量: 4发表: 1978年 Computer Tuning Applied to AM-FM Radios tuning/ AMFMcomputer...
This comes with high-quality parts and a circuit board that is made of fiber glass. These high-class components help produce good sound quality. There are two adjustment modes for AM and FM receivers making frequency configuration hassle-free.The Vogurtime DIY kitis also perfect for STEM proje...
FM Indoor Antenna Connect the lead-type FM antenna to the FM 75Ω socket, extend the lead and tune the tuner to your favorite station (see page 13). Adjust the antenna in a suitable location like a window frame or wall until the reception is best and then affix the antenna in that ...
An 118dB DR CT IF-to-Baseband △Σ Modulator for AM/FM/IBOC Radio Receivers This multi-standard CMOS CT △Σ modulator with integrated mixer digitizes a radio signal at a 10.7MHz IF with a DR of 118dB for AM reception, 98dB for FM reception, and a SFDR of 90dB for in-band on-...
AM radio varies the amplitude of the broadcast signal so the power at which that signal is broadcast is also changed, since amplitude represents the strength of the signal. Some receivers can’t pick up low amplitude signals at all. FM radio, always remains at constant amplitude, so signal ...
A / D Conversion System for AM / FM Radio ReceiversZwanPhilipsBastiaansen
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Erik van der Zwan, Kathleen Philips, and Corné Bastiaansen, “A 10.7MHz IF-to-Baseband E6, A/D conversion system for AM/FM radio receivers,” in IEEE Int. Solid-State Circuits Conf. (ISSCC) digest of technical papers , San Fransisco (CA), Feb. 2000, pp. 340–341....
个人感觉，应该是因为AM和FM在电路实现上都比较简单，所以在无线技术发展初期就被发明出来了。比如：1907...