| 摘要 |
A sensor apparatus for generating a control signal on a sense line (24), said apparatus comprises at least one first electrode (16) and at least one second electrode (18) positioned in proximity to said first electrode. A circuit has first and second input nodes connected to said first and second electrodes (16,18), respectively, and an output node connected to said sense line (24). A signal source (60) provides electrical signals to said first and second electrodes (16, 18). An electric field is generated between said first and second electrodes (16,18) in response to the signals provided to at least one of said first and second electrodes (16,18) by said signal source (60). Said first and second electrodes (16,18) are arranged such that the electric field is disrupted by the presence of a stimulus in proximity to at least one of said first and second electrodes (16,18). Said circuit generates a control signal on said sense line (24) related to the difference in electrical potential between said first and second electrodes (16,18) caused by the disruption to the electric field. |
