Inductively coupled keyboard

Details Inductively coupled keyboard Inductively coupled keyboard

1993-03-15

1994-11-15

Groody, James J.

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 26, 341 32, H03M 1100

Patent

active

053652304

ABSTRACT:
A self-contained keyboard for computer transmits keystroke data to a host computer via scan codes encoded in a variable magnetic field. In a preferred embodiment the keyboard generates magnetic bursts by electrical current bursts in a loop of a electrical conductor. A receiving loop connected to demodulator circuitry in the body of the computer produces emf spikes according to the magnetic bursts transmitted from the keyboard. The demodulator circuitry reproduces digital scan codes in a register for communication to the computer CPU according to the emf spikes monitored from the receiving loop.

REFERENCES:
patent: 4765218 (1988-08-01), Eppingen
patent: 5027115 (1991-06-01), Sato et al.

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