Design and Implementation of an On-Chip Low-Power and High-Flexibility System for Data Acquisition and Processing of an Inertial Measurement Unit

Abstract

For signal processing of a Micro-Electro-Mechanical System (MEMS) Inertial Measurement Unit (IMU), a digital-analog hybrid system-on-chip (SoC) with small area and low power consumption was designed and implemented in this paper. To increase the flexibility of the processing circuit, the designed SoC integrates a low-power processor and supports three startup or debugging modes for different application scenarios. An application-specific computing module and communication interface are designed in the circuit to meet the requirements of IMU signal processing. The configurable clock allows users to dynamically balance computing speed and power consumption in their applications. The chip was taped out under SMIC 180 nm CMOS technology and tested for performance. The results show that the chip’s maximum running frequency is 105 MHz. The total area is 33.94 mm 2 . The dynamic and static power consumption are 0.65 mW/MHz and 0.30 mW/MHz, respectively. When the system clock is 25 MHz, the dynamic and static power consumption of the chip is 76 mW and 66 mW, and the dynamic and static power consumption of the FPGA level are 634 mW and 520 mW. The results verify the superiority of the application specific integrated circuit (ASIC) solution in terms of integration and low power consumption.

Online Nonlinear Error Compensation Circuit Based on Neural Networks

“…The influence of network parameter scale and temperature on the results is also analyzed. As shown in Figure 4, the experimental device includes the inertial sensor ADIS16475 [29] and the data acquisition circuit [30]. The output data of the angular velocity under zero input in the X-axis direction of the sensor were collected and analyzed.…”

“…Since the nonlinear error of the sensor is related to the temperature [31], the output data at a temperature of −40. and the data acquisition circuit [30]. The output data of the angular velocity under zero input in the X-axis direction of the sensor were collected and analyzed.…”

“…and the data acquisition circuit [30]. The output data of the angular velocity under zero input in the X-axis direction of the sensor were collected and analyzed.…”

A Digital-Analog Hybrid System-on-Chip for Capacitive Sensor Measurement and Control

“…In the integrated measurement and control technology of inertial sensors, the chip reported in this article has a significant improvement in circuit integration and richness of functions compared to previous work [ 22 ]. Future research will focus on the power consumption optimization of analog circuits, system-in-package of MEMS structures and SoC chips.…”

“…A dedicated bootloader was integrated into the SoC, which supports program loading through on-chip One Time Programmable (OTP) memory, off-chip flash memory or online Joint Test Action Group (JTAG) debugger. Detailed information about unique designs for a variety of application scenarios has been reported in previous work [ 22 ].…”