Singlewire BiDirectional Simultaneous Skewcompensated and Multiaccess Interface Architecture

Single-wire, Bi-Directional, Simultaneous, Skew-compensated and Multi-access Interface Architecture for Sensor System Jeong-Kyun Kim Dong-Woo Jee Department of Electrical and Computer Engineering, Ajou University, Suwon, Korea dwjee@ajou. ac. kr I. Abstract § Sensor system consists of sensor, amplifier, filter, ADC and DSP § Proposed architecture is single signal line, Bi-directional, simultaneous skew-compensated and multi-access transceiver circuit for wearable sensor system § Communicate 1 Mbps sensors data & 250 kbps sensor configuration data § When the So. C and sensors communicate, data is delayed by skew § Successfully simulated in data communication II. Proposed System < Fig 3. Skew compensation ADC demux architecture > III. Measurement result < Fig 1. Proposed skew compensated transceiver interface chip > Proposed System § Only one signal line for multi sensor data communication § Small system size, low power consumption and low noise § Technology scalable system < Fig 4. Simulated results transmitted and received signals > < Fig 2. Timing skew between So. C and sensor system > Timing Skew § So. C receives sensor data delayed by skew § Total skew = So. C/sensor data transmission skew ( / ) + sensor clock recover delay( ) § Skew compensation is required for accurate sensor data recover < Fig 5. Proposed transceiver interface chip > IV. Result § Proposed transceiver system use only single signal line for bi-directional, simultaneous and multi-access data communication § 4 sensor data are successfully recovered through skew compensation