Retrofitable CD player system
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United States of America Patent
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-
Aug 4, 1998
Grant Date -
N/A
app pub date -
Nov 21, 1996
filing date -
Nov 21, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Installing a high quality audio source, such as a CD player, in an automobil requires often installation of a radio/tuner of sufficient quality to provide an audio signal corresponding to the quality of the audio source. In leased automobils this presents a problem because of warrenty and return conditions. The problem is solved by using a separate amplifier connected into the wiring between factory installed radio/tuner and loudspeakers and sensing the setting of the radio/tuner control knobs by placing a defined modulated carrier on the antenna input of the radio/tuner. The output of the radio/tuner then provides a signal reflecting the setting of the control knobs. This signal is used to control the amplifier.
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