METHOD, DEVICE, AND ELECTRONIC SIGNATURE TOOL FOR USE IN MATCHING WITH AUDIO INTER-FACE OF MOBILE TERMINAL

摘要

invention is a mobile terminal of the audio interface and the matching for a method, apparatus, and Bar to provide an electronic signature tool, the method, the third pin of the audio interface connected to the first pin of the audio interface via a first circuit, the first circuit includes a first unidirectional conduction module, the first single the direction of current conduction module that is flowing in a first pin; Connecting the third pin and the second pin of the second through the audio interface circuit, that the second circuit includes a second unidirectional conducting module, a second current direction of the unidirectional conduction module flow to the second pin ; A first unidirectional conduction to control the conduction of the module to form a loop, a third pin to the first pin, is matched to the impedance value of the loop resistance and the recognition of the mobile terminal to each other; A second controlled unidirectional conduction module for conducting a loop to form a third pin and a second pin, the impedance value of the loop also includes that match with each other and recognize the resistance of the mobile station. The impedance of the loop of the audio output pin and the ground pin of the audio interface can be matched to each other and recognize the resistance of the mobile station. ;