Transmitting and receiving device and transmitting device...

Details Transmitting and receiving device and transmitting device... Transmitting and receiving device and transmitting device...

2007-12-04

2007-12-04

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S110000, C381S002000

Reexamination Certificate

active

11536251

ABSTRACT:
According to one aspect of this invention, there is provided a transmitting and receiving device including a transmitting device having a pulse width modulation encoder which generates a pulse width signal having a pulse width corresponding to the binary digital signals outputted from the plurality of sigma-delta analog-to-digital conversion units, and a light-emitting element drive unit which generates and transmits an optical signal by causing a light-emitting element to emit light on the basis of the pulse width signal, and a receiving device having an optical reception unit which converts a current signal, obtained by receiving the optical signal by a light-receiving element, into the pulse width signal, and a pulse width demodulation decoder which reconstructs the binary digital signals of a plurality of channels on the basis of the pulse width signal.

REFERENCES:
patent: 5287107 (1994-02-01), Gampell et al.
patent: 5844513 (1998-12-01), Nishio
patent: 7075280 (2006-07-01), May
patent: 8-279786 (1996-10-01), None
patent: 8-331064 (1996-12-01), None
patent: 11-55353 (1999-02-01), None
patent: 2005-294758 (2005-10-01), None
patent: 2005-311847 (2005-11-01), None

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