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.