| 摘要 |
The invention provides an encoder which includes a matrix (14); (14 min ) interconnecting an array of resistive sensors (51-80); (51 min -75 min ) between inputs and outputs thereof with the outputs being held at a constant voltage. The encoder further includes a detecting circuit (20); (20 min ) having a current-measuring detector (106-110); (106 min -110 min ) for receiving sensing currents (136-138) from said outputs and producing current responsive detection signals (22-26) in response to sequential scanning of the matrix inputs. |
