New PDF release: Advanced Microsystems Automotive Applications 2004

By Jürgen Valldorf, Wolfgang Gessner

Microsystems functions (MST) in cars became general: they allow the creation of a chain of recent capabilities and even as the alternative of present applied sciences providing more advantageous functionality and higher price for cash. Microsystems are imperative for gratifying a whole transition from the automatically pushed motor vehicle approach to a robotically established yet ICT-driven approach as a part of a likewise advanced setting. With the advent of micro-systems a chain of demanding situations come up concerning complexity, platforms layout, reliability, serviceability, and so on. those demanding situations must be addressed as a way to meet excessive patron expectancies referring to functionality and value.

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Based on production test data, the following parameters can be adjusted in the ASIC by programming the device using the onboard EEPROM. 5 V offset). Pre-amplifier Gain sign – 1 bit (positive vs. negative output). 5 mV in 16 steps. Pre-amplifier Offset sign – 1 bit (positive vs. negative input). Upwards of 20 coefficients in Pressure and Temperature correction. Output Clamp – Independent Adjustment in 40 mV steps. Output Filter – 1 to 256 Conversions in 1, 2, 4, 8, 16, 32, 64, 128 and 256 steps equivalent to approximately 1 to 256 mS.

This would result in data “collisions” causing the RF receiver to be unable to discern any data. The usual method to solve this issue is to randomize the transmission times and also send multiple randomized data words within any given transmission. NVM Memory (8) – The non-volatile memory (NVM) module serves several purposes. One purpose of the NVM is to store trimming values to make each sensor meet the required accuracy for pressure and temperature measurements. One other purpose for the NVM is to store a unique serial code for each wheel sensor and to store the configuration bit of the device.

Mark L. Shaw, Motorola Semiconductor Products Sector. 305: Tire Pressure Monitoring System, Motorola Inc. com Keywords: MEMS, CMOS Pressure sensor, Tire Pressure Monitoring, State Machine 37 39 Low-Cost, Single-Chip Amplified Pressure Sensor in a Moulded Package for Tire Pressure Measurement and Motor Management R. Bornefeld, W. Schreiber-Prillwitz, O. Stöver, Elmos Semiconductor AG H. V. Allen, M. L. Dunbar, J. G. Markle, Silicon Microstructures, Inc. I. van Dommelen, A. Nebeling, J. V. Abstract Advanced automotive sensor systems used for tire pressure measurements and motor management show a strong demand for increased robustness, functionality and flexibility at reasonable low costs.

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