Patent ID: 8812140
Filing Date: 2014-08-19
Classification: H04M

Abstract:
1. A signal transforming device through audio interface electrically connected to a mobile phone via an audio I/O interface jack of the mobile phone, the mobile phone installed an application program therein, the signal transforming device comprising: a micro control unit for producing a first digital signal; a digital-analog transforming unit electrically connected to the micro control unit, receiving the first digital signal produced by the micro control unit to transform the received first digital signal into a first analog audio signal according to a predetermined coding reference; an audio I/O interface plug; a first frequency divider electrically connected between the audio I/O interface plug and an analog-digital transforming unit, wherein the first frequency divider receives a second analog audio signal from the audio I/O interface plug to filter signal according to a first inaudible audio frequency, and transmits the filtered second analog audio signal to the analog-digital transforming unit to transform; the analog-digital transforming unit electrically connected to the micro control unit, receiving the filtered second analog audio signal to transform the received filtered second analog audio signal into a second digital signal according to a predetermined decoding reference, and transmitting the transformed second digital signal to the micro control unit to be processed; a second frequency divider electrically connected between the audio I/O interface plug and the digital-analog transforming unit, wherein the second frequency divider receives the first analog audio signal from the digital-analog transforming unit to filter the signal according to the first inaudible audio frequency, and transmits the filtered first analog audio signal to the audio I/O interface plug to output to the mobile phone; and an audio I/O interface electrically connected to the first frequency divider and the second frequency divider, wherein the signal transforming device electrically connects to an external audio I/O device via the audio I/O interface, the audio I/O interface receives signal according to a second audio frequency filtered from the first frequency divider and the second frequency divider to output the filtered signal to the external audio I/O device, wherein, the signal transforming device electrically connects to the audio I/O interface jack of the mobile phone via the audio I/O interface plug, so as to transmit the filtered first analog audio signal and the second analog audio signal with the mobile phone, a radio frequency processing unit electrically connected to the micro control unit; and a radio frequency antenna unit electrically connected to the radio frequency processing unit; wherein, the signal transforming device receives a radio frequency signal from an external radio frequency tag via the radio frequency antenna unit, and the radio frequency processing unit processes the received radio frequency signal and transmits the processed radio frequency signal to the micro control unit, and the micro control unit produces the first digital signal according to the radio frequency signal.