Local wireless audio signal RF transmitter and receiver having a single downconverter without need for IF carrier
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United States of America Patent
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Feb 20, 2007
Grant Date -
Mar 17, 2005
app pub date -
Aug 26, 2003
filing date -
Aug 26, 2003
priority date (Note) -
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Abstract
A local wireless system for transmitting a modulated RF carrier audio signal from a base unit to a receiver unit is provided. The base unit has a pair of audio input connections of which are coupled to an audio source amplification device for receiving left and right audio signals. The receiver unit has a pair of electroacoustic transducers (speakers) for reproducing demodulated left and right audio signals modulated upon the RF carrier audio signal. The base unit encloses a transmitting circuit having a first antenna and first, second and third circuits which modulate the left and right audio signals onto an RF carrier signal in the 900 MHz range. A receiver unit encloses a receiver circuit and is coupled to the pair of speakers. The receiver circuit performs a single downconversion of the modulated RF carrier signal from the 900 MHz range to a useable 10.7 MHz left and right signal.
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