Patent ID: 7043027
Filing Date: 2006-05-09
Classification: H04R

Abstract:
1. A speaker diagnostic system, comprising: a microprocessor having a signal in an encoded form, and having a first output and a second output, where the first output is used for transmitting the encoded signal serially and the second output is used for transmitting a switching signal; a data converter having an input and an output, where the input is connected to the first output from the microprocessor to convert the serial input into a parallel output; a resistor bank having at least one input terminal and having at least one output terminal, where the input terminal is connected to the output of the data converter, the resistor bank scaling the input from the data converter and transmitting a scaled signal through the output terminal; a switch having at least three terminals, where a first terminal is connected to the output terminal of the resistor bank, a second terminal is connected to the second output of the microprocessor, and a third terminal is an output from the switch, where the switching signal at the second terminal allows the scaled signal at the first terminal to be transmitted to the third terminal; and a signal processor having an input and an output, where the input is connected to the output from the switch, and the output is connected to the speaker module, the signal processor performing amplification and level shifting on the scaled signal and delivering a signal on the output to the speaker module.