| 摘要 |
<p>PURPOSE:To decrease the number of terminals and construct an apparatus concerned simple and small by connecting a power supply contact to the power supply through a power supply limiter circuit, connecting a signal electrode, ground electrode and power supply electrode of a three-polar plug with a signal contact, ground contact and power supply contact, respectively, and connecting a signal electrode of a two-polar plug to the signal contact, and then connecting the ground electrode of the two-polar plug to the ground contact and power supply contact. CONSTITUTION:A signal contact 11p, ground contact 11c, and power supply contact 11h are furnished, the last being connected to a power supply 13 through a power supply limiter circuit 12. A signal electrode 7p, ground electrode 7c, and power supply electrode 7h of a three-polar plug 7 are connected to these signal contact 11p, ground contact 11c and power supply contact 11h, respectively, while a signal electrode 2h of a two-polar plug 2 is connected to the signal contact 11p, and the ground electrode 2c of this two-polar plug 2 is connected to the ground contact 11c and power supply contact 11h.</p> |
