Mixed-signal SoC design and low power research for tire pressure monitoring systems

Tire pressure monitoring system (TPMS) is very important for the driver's safety, and it provides the status of the tires in real-time to ensure a safety driving. The design of a mixed-signal System on Chip (SoC) is the key to reduce the cost of the system. According to the recommendations of GB/T 26149-2010 TPM Sensor Module based Tire Pressure Monitoring systems for motor vehicles published in 2011; our design of a mixed-signal SoC for TPMS has been accomplished. The mixed-signal SoC is designed and fabricated using 0.35µm ASMC BCD&EE automotive process. It has been taped out. Base on the post-simulation, this mixed-signal SoC can detect the tire pressure that is ranging from 100Kpa to 750Kpa and the tire temperature ranging from −40°C to 105°C. The range of supply voltage is from 3.2V to 4.3V. Furthermore, since the battery of TPMS can't be replaced, we proposed two low power designs.