| 摘要 |
<p>There is disclosed an improved proximity sensor (100a - 100e), and a method of using same. A number of problems are identified in known sensors, e.g. ease of programmability, cost, operating power, operating voltage and accuracy. The invention therefore provides an inductive proximity sensor or switch (100a - 100e) comprising an Application Specific Integrated Circuit (ASIC) (10), and a plurality of external components. The ASIC (10) is implemented in CMOS technology, and has an oscillator, a switch point of the sensor/switch (100a - 100E) being predetermined by a selection of a bias voltage to a potential node of the oscillator.</p> |
