| 摘要 |
Utilisation of electrostatic sensor elements in an array to provide an electrostatic image is known. Problems can arise with respect to cross talk between electrostatic sensor elements and as a result of external electrical sources. By providing a differential input amplifier and taking output signals from adjacent or adjoining sensor elements to providing a differential signal it is possible to improve images. Furthermore, the differential input amplifier incorporates decoupling devices such as capacitors to reduce noise within the output and input signals and the aspect ratio of the sensor in terms of depth to width can also aid reduction in noise levels.
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