| 摘要 |
<p>An electronic sensing circuit for use with a balanced two-wire load including a pair of voltage divider networks connected thereto, respectively. The midpoint nodes of the voltage divider network have substantially equal voltage levels in one state of said load and have a voltage differential measurable therebetween in another state of said load. A voltage differential detector means such as a capacitor or differential amplifier is used to measure the voltage differential between the midpoint nodes.</p> |
