Low Power Design And Verification Of The Chip That Measures Heart Rate And Blood Oxygen

Over the past few decades,the semiconductor industry has continued to evolve and innovate in accordance with Moore’s Law,with device sizes and minimum widths of metal wires decreasing rapidly.With the progress of semiconductor technology and the hot Internet of things,chip design complexity and working frequency are also increasing rapidly,and the power consumption of the system is increasing accordingly.Heart rate blood oxygen detection chip can be placed in watches,wristbands and other products,powered by the internal battery unified,so this kind of products for power consumption is very high.In this context,the design and verification of heart rate blood oxygen detection chip system is studied in this thesis.Firstly,a low power design scheme for heart rate blood oxygen detection chip is developed based on the source of power consumption in IC.The design of intelligent PMU power management unit can timely control the interaction between the system and the master controller,analyze the command of the master controller to the system,and accurately control the switching sequence of the power supply and clock of the system and internal modules.Given the clock of an immense impact on the system power consumption,this thesis will also be the system clock design for the structure of the clock tree,according to the demand for clock module,insert the clock gating unit,clock gating through register control unit,it close on time does not work the clock module,clock flip the dynamic power consumption is greatly reduced.In addition,combined with the overall structure of the chip system and the characteristics of the working mode,the system is divided into four power supply domains: Control power supply domain,working power supply domain,DSP power supply domain and FIFO power domain,and design a complete power supply network,according to the features of power supply domain between the isolation unit,insert the power switch unit,using the same gauge format UPF describe the system of power network,power consumption and the advantage of the characteristics of Python and Excel,realize the automation of UPF files generated,greatly improve the design efficiency.Secondly,based on the UVM verification methodology,this thesis establishes the verification environment of the system.According to the function and design requirements of the system,the function points of verification are extracted and the system is fully verified.The formality of UPF files was then implemented using the LPV application in Jasper Gold.The power model and assertion checks generated by the LPV program ensured the correct definition of the power network and the correct insertion of isolation units and power switch units.Finally,in order to ensure the power consumption of the system meet the design requirements,using PTPX tool for heart rate estimation of blood oxygen detection chip system power consumption,with the continuous optimization of low power technology of the system,the project system in the process of power consumption is a declining trend,the overall power consumption by 8.65% ～ 41%,low-power with other types of heart rate and blood oxygen monitoring products,compared to It can be seen that the power consumption index of the heart rate blood oxygen detection chip in this thesis is close to the advanced level of the market,which proves that the low-power design strategy used in this thesis is very obvious for power optimization.