Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1995-11-30
1997-11-04
Ton, Dang
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
375373, H03D 324
Patent
active
056848056
ABSTRACT:
A microwave multiphase detector for demultiplexing and regenerating data from an incoming data stream includes N data channels and has a data rate R. For recovering data corresponding to a channel M, a detecting unit receives the data stream, detects a sampling phase corresponding to a data transition on channel M and generates a phase width modulated (pwm) pulse, phase modulated with the sampling phase. A digital to analog (D/A) conversion unit converts the pwm pulse to a contributing control voltage and a data regeneration unit provides a recovered data bit for channel (M). The detector is supplied with N variants of a local clock signal with a rate R/N, each variant being phase displaced with .+-.360.degree./N from the adjacent variants. A counterbalancing unit is also provided for each channel, such that if a pwm pulse is indeed generated, the contributing voltage for that pulse is compensated for with a balance pulse of opposed amplitude. In this way, the sampling phase corresponding to the respective M data channel may be adjusted by varying the ratio between the amplitudes of the pwm pulse and the balance pulse.
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J. Hauenschild, "A 22 Gb/s Circuit and a 32 Gb/s Regenerating Demultiplexer IC Fabricated in Silicon Bipolar Technology", Paper 7.4, Bipolar Circuits and Technology Meeting, IEEE 1992.
Diaconescu Aprilia U.
Ton Dang
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