Microphone controller with multifunction single conductor

Details Microphone controller with multifunction single conductor Microphone controller with multifunction single conductor

H - Electricity

04

B

H04B 7/26 (2006.01) H04M 1/60 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2042040

MICROPHONE-CONTROLLER WITH MULTIFUNCTION, SINGLE CONDUCTOR Abstract of the Invention The single power conductor carries audio and a serial data bus. The microphone's amplifier (101) is connected to the conductor (108). The incoming audio signal rides on the DC supply voltage from the radiotelephone. The supply voltage, through a voltage regulator (103), supplies power to the amplifier (102) and a microprocessor (105), used to transmit the serial data message on the conductor (108). Both the amplifier (102) and the voltage regulator (103) are isolated from the power conductor (108) by a FET switch (104) that is controlled by the microprocessor (105). The switch (104) is turned off, isolating the circuitry when the microprocessor (105) is transmitting.

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