Scan-controlled keyboard
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United States of America Patent
Stats
-
Jul 7, 1981
Grant Date -
N/A
app pub date -
Feb 15, 1980
filing date -
Feb 15, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A keyboard having a matrix arrangement of analog keyswitches arranged along column conductors leading from a driver chip and row conductors leading to a detector chip. The driver chip has a strobe line and multiple address lines adapted to connect to a controller. The column conductors are sequentially pulsed by the driver chip. The detector chip has a strobe line common to that of the driver chip and a multiple line data bus for directing keyboard signals simultaneously from the several row columns.
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