A host device communicates with the master device using a non-return-to-zero data encoding.

An O/E conversion element (31) converts an input NRZ optical signal into an electric signal.

A synchronous decoder for recovering a train of binary data encoded in a biphase format and decoding into NRZ format.

A method for modulating a binary data stream into a code format suitable for encoding and decoding information that employs a non-return-to-zero (NRZ) technique.

A method for modulating binary data into a format suitable for encoding and decoding information, that employs a non-return-to-zero (NRZ) technique.

Applications of the SFPLL include demodulation in CW modulation systems and timing recovery from NRZ data.

Two consecutive bits of data in the original non-return-to- zero (NRZ) data stream are grouped and are converted by an encoding circuit into two new consecutive data bits of the same duration as the original bits.