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Type: Artigo de periódico
Title: Analogue control of the slew-rate in LIN bus digital transitions using translinear circuits
Author: Tercariol, WL
Ferreira, EC
Dias, JAS
Abstract: A novel technique to control the LIN (Local Interconnect Network) bus slew-rate transitions in automotive environment, where large fluctuations of the battery voltage are present, is reported. A bipolar translinear circuit generates a non-linear current that is used to modulate a MOS relaxation oscillator, producing a clock frequency that delivers a constant number of pulses during the LIN bus digital signal transition. This frequency modulated clock when applied to a digitally controlled analogue wave-shape driver results in a LIN bus digital transition with a slew-rate that is constant and independent of the car battery voltage. Experimental results measured in an IC implemented in a BiCMOS process showed that constant slew-rate transition of 1 +/- 2% V/mu s is obtained for battery voltages varying from 6 to 40 V, over the temperature range of -40 to 150 degrees C.
Subject: Translinear circuits
LIN transceivers
Automotive circuits
Slew-rate control
Country: Holanda
Editor: Springer
Citation: Analog Integrated Circuits And Signal Processing. Springer, v. 72, n. 2, n. 325, n. 331, 2012.
Rights: fechado
Identifier DOI: 10.1007/s10470-011-9810-7
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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