Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1984-09-17
1986-09-16
Rubinson, Gene Z.
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
1791155VC, 179115R, 179181R, 329193, 3701103, 381117, H04R 900, H04R 308, H04R 706, H04R 906
Patent
active
046124209
ABSTRACT:
An electrodynamic transducer (1) for use in a loudspeaker system for converting an n-bit digitized electric signal (11) into an acoustic signal comprises n voice-coil devices (4.1, 4.2, . . . 4.n) which cooperate with a magnet system (3). The voice-coil devices each comprise a conductor whose length is the same for all the voice-coil devices. The areas of the perpendicular cross-sections of the conductors increase each time by a factor of two starting from the voice-coil device (4.n) corresponding to the least significant bit and going to voice-coil devices corresponding to consecutive more significant bits. The invention enables the transducer to be constructed in a simple manner if the transducer is a moving-coil loudspeaker or if it is a ribbon-type loudspeaker.
REFERENCES:
patent: 4481660 (1984-11-01), de Koning et al.
Nieuwendijk Joris A. M.
van Gijsel Wilhelmus D. A. M.
Byrd Danita R.
Franzblau Bernard
Mayer Robert T.
Rubinson Gene Z.
U.S. Philips Corporation
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