| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To realize an impedance matching between a balance signal transmission line and a communication load circuit by simple, miniaturized and inexpensive circuit constitution. <P>SOLUTION: In a communication terminal 20A connecting a current detector 5 between an I/O terminal 2a and the communication load circuit 4 in series, a circuit of diodes D1', D2' having the same constitution and the same impedance characteristics as a circuit of light emitting diodes D1, D2 used for the current detector 5 is connected between the communication load circuit 4 and an I/O terminal 2b as a balance-unbalance conversion circuit 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
