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The recent growing interest for indoor Location-Based Services (LBSs) has created a need for more accurate and low-cost indoor localization system. The existing solutions are either low-cost with low-accuracy or high-accuracy with high-cost. A positioning solution for indoor localization system with Bluetooth and UWB is proposed in this paper. The system combines both advantages of Bluetooth and UWB,...
Miniaturized Inertial Measurement Unit (IMU) has been widely used in many motion capturing applications. In order to overcome stability and noise problems of IMU, a lot of efforts have been made to develop appropriate data fusion method to obtain reliable orientation estimation from IMU data. This article presents a method which models the errors of orientation, gyroscope bias and magnetic disturbance,...
A new sensing architecture aiming at negative threshold voltage detection for 3D NAND Flash memory cells is proposed. This sensing architecture does not need triple well devices and negative voltage supplies. In this architecture, we apply 2 V to source line (SL) rather than 0V which is always used in conventional method. We prove that this architecture is feasible by Technology Computer Aided Design...
8T SRAMs operating at sub-threshold supply voltages suffer from bit-line swing degradation when the data pattern of a column is dominated by ‘1’ or ‘0’. Worst case scenarios happen when the accessed bit is different from the rest of the column. In this work, a simplified Linear Feedback Shift Register (LFSR) is used to shuffle input data so that distribution of “1” and “0” in each column is close...
This paper presents a 7T near-threshold SRAM with design techniques for improving cell stability and energy efficiency. The proposed write through virtual ground (WTVG) scheme decreases the period of write disturbance by 6.1×. A PVT tracking sensing scheme is presented to track variation and sense small RBL swing. The ultra-fine grain power gating switches are implemented to minimize the redundant...
High energy efficient ultra-low voltage SRAMs play a key role in many emerging ultra-low power applications. However, design of SRAMs for reliable ultra-low voltage operation is challenging due to various problems. In this paper, we explore various ultra-low voltage SRAM design techniques for improving energy efficiency. Effect of MTCMOS on energy efficiency improvement, circuit techniques for ultra-low...
The testing system based MEMS inertial devices is a kind special measurement system which is integrated with MEMS inertial sensor, ASIC and its corresponding software. Because of having merits such as small bulk, low cost, light weight, high reliability, and anti-harsh environments, it is widely used in the military and civil fields, especially suited for the high-g guided ammunition, but use what...
A new time-sharing self-sensing method using piezoelectric actuators for active vibration suppression is proposed and investigated. This self-sensing technique is based on the idea that one PZT can have two electrical properties, namely whether it acts as a sensor or as an actuator. The actuation characteristics of the time-sharing self-sensing piezoelectric actuators were discussed. The shift between...
This paper proposes a new method of multi-axle control for numerical controller. By adopting this method, pulse series for real-time control can be easily generated, and driving velocity for multi-axle with the non-orthogonal coordinate also can be easily realize. Command pulse can be modified in real time by introducing the sensor signal into the feedback loop of controller. Simulation of six joints...
A specially-designed wireless BSN (body sensor network) platform was proposed for in-home health monitoring applications. The BSN platform was composed of BSN nodes and a base-station. The BSN nodes with advantages of small size and low power consumption were attached on human body to collect physiological data, and transmit wirelessly to the base-station which served as a master node within a BSN...
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