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In this paper, we proposed a calibration strategy utilizing reference sensor for bio-detection based on GMR sensor. With this calibration strategy, temperature drift effect can be cancelled by about 85%, and the carrier signal can be reduced by 26dB enabling a dynamic range adjustment for quantization. A 90% reduction of front-end common mode noise and error, and a sensitivity of 50ppm or 600 200nm-diameter...
A linear CMOS image sensor (CIS) with 16-stage time-delay integration (TDI) is proposed in this paper for bio-microfluidic imaging system. Compared to the traditional CIS for bio-microfluidic applications, this CIS achieves high speed and high sensitivity in low illumination condition, which is suitable for bio-microfluidic. Moreover, a simple voltage accumulator and 10-bit full-differential single-slope...
The sensitivities of a Monte Carlo simulation tool (PRESTAGE) to variation of input parameters are studied. When calculating the single event upset cross-section induced by proton direct ionization, PRESTAGE calculation results significantly change with changes in the sensitive volume and passivation layer thicknesses. When calculating cross-sections induced by proton indirect ionizations, PRESTAGE...
In this paper, we studied effects of doping concentration on the semi-floating gate (SFG) image sensor by Sentaurus technology computer aided design (TCAD) simulation. Our results show that the doping concentration of about 6e16 cm−3 for both n-well and p-well is appropriate for the SFG sensor. The doping concentration plays an important role on the output current range and the sensitivity of the...
This paper described a disposable overoxidized polypyrrole/graphene/gold (OPPy/GE/Au) microelectrode by two-step electrooxidation at a three-electrode-integrated electrochemical sensor, and its application for selective determination of dopamine (DA) without the interference of ascorbic acid (AA). Compared with the bare Au electrode, OPPy/GE/Au electrode exhibits much stronger electroactivity for...
Because of the electrical asymmetry, the traditional five-contact vertical Hall devices have large inherent offset. This paper presents a low-offset vertical Hall device with a couple of three-contact vertical Hall elements. Due to the good electrical symmetry of this new vertical Hall device, the inherent offset is significantly lower than that of a five-contact vertical Hall device. The simulation...
This paper presents a radio frequency front end of 5.8GHz dedicated short range communication receiver, utilizing a low-IF heterodyne architecture, which is necessary to solve the image problem and I/Q mismatches. A LC tank that is used as load of LNA can tune the resonant frequency more accurately than specific process allows. A simple but effective voltage bias for the first RF mixer is proposed,...
This work uses the mutual temperature compensation of threshold voltage and carrier mobility to establish the optimum overdrive voltage for a MOS transistor. A fully differential SAR ADC is designed using 65 nm technology with improved temperature and process stability and can work under supply voltage of 300 mV. Simulation results show that under VDD of 300 mV the ADC is able to achieve a peak ENOB...
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 0.35µm CMOS process has a low operating current...
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