| 摘要 |
Electronic system for competitively buying and answering, comprising computer, interface controller, competitively buying controller and matrix scanning competitively buying circuit; the interface controller comprising bus buffering circuit, decoding circuit, row scanning controlling circuit and interface; the competitively buying controller row scanning driving circuit, column signal input circuit, interface etc., the matrix scanning competitively buying circuit comprising plurality of m signal lines arranged in rows, plurality of n signal lines arranged in columns and plurality of mxn competitively answering switches. The system having two man functions: 1. simultaneously monitoring the state in which several tens of people or hundred of people are competitively buying/answering, correctly determining whether the competitively buying is valid or not on time without error and displaying the position of the person who has pressed the switches on television device and/or on large screen; 2. accumulating how many persons have pressed the switches during a given period and displaying the result on television device and/or on large screen. |
