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Combination broadcast receiver and mobile telephone

  • US 5,247,705 A
  • Filed: 03/18/1991
  • Issued: 09/21/1993
  • Est. Priority Date: 03/20/1990
  • Status: Expired due to Term
First Claim
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1. A combination broadcast receiver and mobile telephone system for a motor vehicle having respective output terminals (2) controlling a plurality of peripheral devices (3, 4, 5, 17) which become acoustically operative in the interior of the motor vehicle, said system comprisinga microphone (6) disposed in the interior of the motor vehicle and a voice command detection circuit (7) having a first input connected to said microphone (6);

  • a manually actuatable pulse switch (8);

    a coupling switch (9) having a first input connected to an output of said pulse switch (8), and a plurality of outputs for simultaneously actuating the voice command detection circuit (7) and muting said peripheral devices (3, 4, 5,

         17) connected to said terminals (2), and;

    a controllable timer element (10), which controls the length of time the coupling switch (9) is switched on, said timer element having a control input (11) which is connected to an output of the voice command detection circuit (7) for reception of an acknowledgement signal;

    whereinmanual actuation of said pulse switch (8) turns on said coupling switch (9) for a predetermined initial muting period;

    said detection circuit (7) listens for a command during said initial muting period and, depending upon which command is detected, alternatively terminates said muting period or extends said muting period by sending said acknowledgement signal to said timer element (10).

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