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In this study, twenty-four core sediment samples were collected from monitoring stations in the East China Sea (ECS) to investigate the spatial and temporal distributions of polybrominated diphenyl ethers (PBDEs) and their potential sources. In surface sediment samples (the top 0-3 cm segment), the concentrations of Σ8PBDEs (sum of BDE15, 28, 47, 99, 100,(More)
In this paper, a control and readout circuit for MEMS vibratory gyroscope is described, including closed- loop driving axis and open-loop sensing axis. Capacitive mismatch auto-compensation has been implemented in this system to suppress the influence to the output due to the mismatch of gyroscope capacitors. The ASIC is fabricated in a 0.35um CMOS process.(More)
The paper presents a closed-loop system scheme with DC sensing method for vibratory gyroscopes. A DC sensing method is employed to convert the amplitude-modulated capacitive signal to voltage. The system realizes a closed-loop control in the driving mode. A high voltage (HV) drive signal which is compatible with the gyro is obtained by the on-chip level(More)
In this paper, a micromachined gyroscope system composed of a vibratory gyroscope with its interface ASIC is presented. The system adopts a DC sensing method to detect the capacitive motion, which is insensitive to the mismatch of the gyroscope capacitors and can eliminate high frequency signals from the chip. Therefore it offers a commendable noise(More)
This paper presents a low-noise SC-type interface ASIC for a closed-loop MEMS vibratory gyroscope. An AC sensing method is employed to convert the amplitude-modulated capacitive signal to voltage signal. The interface CSA (charge sensitive amplifier) is followed by a CDS (correlated double sampling) circuit to reduce low frequency noise and eliminate(More)
This paper presents a new structure of column-level successive approximation register (SAR) analogue-to-digital converter (ADC) for Infrared Focal Plane Array. In this design, each column has a capacitance array and each comparator and SAR logic block are shared by 8 columns. By using this shared structure, we achieved smaller silicon area, lower power(More)
In this study, an aerobic strain identified as Rhodococcus sp. was isolated from the sediment of a typical electronic waste disassemble site, Taizhou, China. This strain could use BDE-209 as the sole carbon and energy source and degrade 65.1% of BDE-209 (initial concentration being 50 mg/L) within 144 h. To explore the BDE-209 degradation properties of this(More)
This paper proposes a current-mode bandgap reference which employs a novel “coarse” voltage replication to offset the 2nd-order curvature due to base-emitter voltage of the BJT. The coarse replication is based on a process insensitive transcendental equation which regulates the independent CTAT current. The bandgap reference which will be implemented in(More)