Bus line current calibration

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6988044
APP PUB NO 20040034485A1
SERIAL NO

10409033

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Disclosed herein is a method and system for calibrating line drive currents in systems that generate data signals by varying line drive currents and that interpret the data signals by comparing them to one or more reference voltages. The calibration includes varying the line drive current at a transmitting component. At different line drive currents, a receiver reference voltage is varied while the transmitting component transmits data to a receiving component. At each line drive current, the system records the highest and lowest receiver reference voltages at which data errors do not occur. The system then examines the recorded high and low receiver reference voltages to determine a desirable line drive current.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
RAMBUS INC.LOS ALTOS, CA1458

International Classification(s)

  • Non-US Classification not provided for expired patents

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Batra, Pradeep Santa Clara, CA 21 265
Rutkowski, Rick A Sunnyvale, CA 4 28

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ROUND ROCK RESEARCH, LLC (2)
6333639 Method and apparatus for independent output driver calibration 29 2000
6330194 High speed I/O calibration using an input path and simplified logic 42 2000
 
NATIONAL SEMICONDUCTOR CORPORATION (3)
6160851 Line driver calibration circuit 22 1998
* 5973516 Transient signal detector with temporal hysteresis 6 1998
6313776 Calibrated line driver with digital-to-analog converter 15 1999
 
AVAYA INC. (1)
* 6301358 Dual-slope current battery-feed circuit 12 1998
 
SAMSUNG ELECTRONICS CO., LTD. (1)
6313670 Integrated driver circuits having current control capability 16 1999
 
RAMBUS INC. (2)
6094075 Current control technique 62 1998
6294934 Current control technique 28 2000
* Cited By Examiner

Patent Citation Ranking

  • Citation Ranking not provided for expired patents

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
* 8271231 Computer device configuration system and method 0 2005
* Cited By Examiner

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