Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Reexamination Certificate
2006-08-08
2006-08-08
Bayard, Emmanuel (Department: 2634)
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
C375S271000, C375S272000, C375S219000, C455S013100, C455S434000, C455S041100, C370S209000, C370S280000, C713S182000, C340S010200, C307S149000, C345S156000
Reexamination Certificate
active
07088267
ABSTRACT:
A duplex-system digital-data transmitting apparatus includes a digital-data signal source which outputs serial data at a signal output end. The level of the data is converted by a first level converter circuit. The data is supplied to an FSK modulator circuit to be FSK-modulated. Carriers are, for example, at 11 MHz and 13 MHz and correspond to digital signals “1” and “0”, respectively. The modulated signal is amplified by a driver and is coupled to the human body by a capacitor of about 100 pF. When the human body comes into contact with an electrode, the modulated signal transmitted through the human body is amplified by a pre-amplifier, demodulated by a demodulator circuit, and shaped by a comparator. The level of the shaped signal is converted by a second level converter circuit, and the signal is supplied to a serial input end of a receiving unit. Transmission and reception are performed using a half-duplex system.
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Bayard Emmanuel
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Pathak Sudhanshu C.
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