Communications: electrical – Continuously variable indicating – With particular transmitter
Patent
1980-08-28
1983-02-15
Groody, James J.
Communications: electrical
Continuously variable indicating
With particular transmitter
340365S, 340347AD, 34087029, G08C 1904, G08C 1936
Patent
active
043743846
ABSTRACT:
An encoder includes an array of variable resistance photosensors responsive to variations of incident illumination. The array is interconnected in a row and column matrix having row inputs connected to a sampling control device for sequential application of a predetermined voltage to the inputs. The matrix column outputs are connected to a detecting circuit having a current-measuring detector for receiving sensing currents from the outputs and for producing current responsive detection signals in response to the application of the predetermined voltage at the inputs. The outputs are held at a constant voltage, thereby providing effective isolation between the column outputs and eliminating interaction between elements connected to adjacent columns without the need of additional isolation means, such as isolation diodes, at each matrix intersection.
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Converse, Jr. Robert E.
Groody James J.
Westinghouse Electric Corp.
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