| 摘要 |
A solid state keyboard comprised of a base module, a plurality of key members each having a plunger member comprised of a uniform mixture of a magnetic material such as barium ferrite and a binder such as nylon, and a respective plurality of improved Hall Effect generators, provides a significant improvement in performance and cost effectiveness. Actuation of a key member moves its plunger member, which has a preselected magnetic field, in rectilinear fashion relative to an improved Hall Effect generator, in which offset voltage has been substantially eliminated. This movement exposes the generator to a change in the direction of the magnetic field thus causing a corresponding change in the output voltage of the generator from a first predetermined voltage to a second predetermined voltage.
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