| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize smooth and highly reliable wireless communication control by reducing the load of control in a central processing unit. <P>SOLUTION: An interrogator 100 has a crystal oscillator 21 which generates a carrier wave for accessing wireless tag information of an IC circuit section 52 of a wireless tag circuit element Tp, a PLL 22, a VCO 23, a BASIC pulse generation section 101, an RPLY pulse generation section 102A, an EXE pulse generation section 102B, a PRG pulse generation section 102C, and a PING pulse generation section 102D which cooperate with one another to generate command pulse waveforms classified into a plurality of kinds of functions for accessing the wireless tag information, a transmission multiplying circuit 24 which modulates the carrier wave generated by using command pulse waveforms generated by those pulse generation sections, and an antenna 1 which transmits the modulation output from the transmission multiplying circuit 24 to the wireless tag circuit element Tp in non-contact to access the wireless tag information. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
