| 摘要 |
<p>The module has a measuring capacitor (13) connected to a read conductor (6), and a pulse generator (14) for delivering pulses to the capacitor. A measuring circuit (18) measures the charge of the condenser, and a comparator (19) compares the measurement of the charge of the measuring capacitor with a threshold value. A logical circuit (15) controls a sound transmitter (16) according to the output of the comparator, where the measuring capacitor is connected to the read conductor via an isolated capacitor (12). An independent claim is also included for a method for auditive call control of a lift.</p> |
