Pulse or digital communications – Cable systems and components
Reexamination Certificate
2000-08-09
2004-10-12
Chin, Stephen (Department: 2634)
Pulse or digital communications
Cable systems and components
C326S083000, C326S102000, C327S052000, C327S108000
Reexamination Certificate
active
06804305
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to wide common mode range differential receivers.
BACKGROUND OF THE INVENTION
Low voltage differential sign (LVDS) receivers are known in the art for meeting the bandwidth demands of parallel optical bus technology. Prior art differential receivers are able to receive wide amplitude ranges of from 100 mV to 400 mV. Common mode amplitudes will typically range from 50 mV to 2,350 mV.
BRIEF SUMMARY OF THE INVENTION
Disclosed is a wide common mode range differential receiver comprising an input stage adapted to receive an input signal and its complement with wide common mode and output said signals as current signals; a plurality of self-cascode biasing stages adapted to receive said current signals and output a first analog differential voltage in phase with said input signal and a second analog differential voltage out of phase with said input signal; and a self-bias differential amplifier adapted to receive said first and second analog differential voltages and output an output signal with substantially reduced jitter.
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M. Bazes; Two Novel Fully Complementary Self-Biased CMOS Differential Amplifiers; IEEE Journal of Solid-State Circuits; vol. 26, No. 2, Feb. 1991; pp. 165-168.*
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Xiao et al., FP 15.7: A 500Mb/s. 20 Channel CMOS Laser Diode Array Driver for a Parallel Optical Bus. 1997 IEEE International Solid-State Circuits Conference, Digest of Technical Paper (IEEE 1997).
Cantor Coburn LLP
Chin Stephen
Henkler Richard A.
Pathak Sudhanshu C.
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