A 5 Gb/s Transmitter With a TDR-Based Self-Calibration of Preemphasis Strength

This brief presents a differentially terminated CML transmitter with a self-calibration scheme based on time-domain reflectometry for preemphasis strength control. Without any handshaking or receiver mode control, the transmitter measures the time of flight by applying the same step input on the two...

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Veröffentlicht in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2010-05, Vol.57 (5), p.379-383
Hauptverfasser: Seo, Young-Hun, Kim, Young-Sang, Park, Hong-June, Sim, Jae-Yoon
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container_issue 5
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container_title IEEE transactions on circuits and systems. II, Express briefs
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creator Seo, Young-Hun
Kim, Young-Sang
Park, Hong-June
Sim, Jae-Yoon
description This brief presents a differentially terminated CML transmitter with a self-calibration scheme based on time-domain reflectometry for preemphasis strength control. Without any handshaking or receiver mode control, the transmitter measures the time of flight by applying the same step input on the two transmission lines of the differential link. Since the receiver does not change its configuration, the proposed scheme greatly simplifies the preemphasis adaptation. To verify the calibration scheme, the proposed transmitter is fabricated in a 0.18 ¿m- CMOS. For various lengths of the microstrip line on the printed circuit board up to 80 cm, the tested transmitter greatly improves signal integrity and shows clear eye diagrams at 5 Gb/s.
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ispartof IEEE transactions on circuits and systems. II, Express briefs, 2010-05, Vol.57 (5), p.379-383
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1558-3791
language eng
recordid cdi_ieee_primary_5462919
source IEEE/IET Electronic Library
subjects Adaptive equalization
Calibration
Circuit testing
Circuits
CMOS
Distributed parameter circuits
intersymbol interference (ISI)
Microstrip
Microstrip lines
preemphasis
Printed circuits
Receivers
Reflectometry
Strength
Time domain analysis
Time measurement
time-domain reflectometry (TDR)
Transmission line measurements
Transmitters
title A 5 Gb/s Transmitter With a TDR-Based Self-Calibration of Preemphasis Strength
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