High speed transport system

Details High speed transport system High speed transport system

1994-06-03

1997-03-04

Chin, Stephen

Pulse or digital communications

Equalizers

375257, 375285, 375346, 375371, 333 28R, 333166, 379398, 379416, H03H 730

Patent

active

056087578

ABSTRACT:
A high speed signal transport system (10) provides data transmission across a balanced channel (14). The balanced channel (14) carries differential signals from the output of a differential transmitter (12). An equalizer (18) compensates for distortion in the balanced channel in order to reduce timing jitter of the signal. The signal is applied to the input of a differential receiver (20) which exploits the precise quantization threshold inherent in differential data to accurately convert the signal to digital data. The differential receiver (20) also employs a known frequency reference along with digital transition detection to rephase the digital data to the local clock. No duty-cycle limitation is placed on the signal carried by the balanced channel (14) and therefore the differential transmitter (12) and differential receiver (20) are not required to encode the signal. Because the signal-to-noise ratio seen by the differential receiver (20) is ample for accurate quantization, the equalizer (18) is optimized for jitter reduction in order to obviate the need for analog retiming circuits.

REFERENCES:
patent: 4123625 (1978-10-01), Chow
patent: 4431578 (1984-02-01), Groenhof
patent: 4484336 (1994-11-01), Catchpole et al.
patent: 5036529 (1991-07-01), Shin
patent: 5058130 (1991-10-01), Park
patent: 5305350 (1994-04-01), Budin et al.
patent: 5374861 (1994-12-01), Kubista
patent: 5425060 (1995-06-01), Roberts et al.

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