In this paper, a new reconfigurable polymorphic chip (REPOMO32) is introduced. This chip has been developed in order to investigate the electrical properties of polymorphic circuits and demonstrate the applications of polymorphic electronics. REPOMO32 contains an array of 32 configurable logic elements; each of them can perform the AND, OR, XOR and polymorphic NAND/NOR function which is controlled by the level of the power supply voltage. REPOMO32 parameters are reported together with the analysis of polymorphic circuits implemented and evolved in REPOMO32. Potential applications of the chip are also discussed.
This paper presents ultra-low voltage transconductor using a new bulk-driven quasi-°oatinggate technique (BD-QFG). This technique leads to signi¯cant increase in the transconductance and the bandwidth values of the MOS transistor (MOST) under ultra-low voltage condition. The proposed CMOS structure of the transconductor is capable to work with ultra-low supply voltage of AE300 mV and low power consumption of 18 W. The transconductance value of the transconductor is tunable by external resistor with wide linear range. To prove the validation of the new described technique a second-order G m -C multifunction¯lter is presented as one of the possible applications. The simulation results using 0.18 m CMOS N-Well process from TSMC show the attractive features of the proposed circuit.
Screen‐printed electrodes are widely used in the construction of sensors. The use of graphite material is preferred due to its simple technological processing and low cost. Different graphite pastes are compared for hydrogen peroxide detection. The slope of the calibration curve, linearity and limit of detection have been compared for different pastes and technologies of graphite electrode preparation. The influence of the structure of the paste on response is discussed. Physical methods of sensitivity enhancement are proposed. All results are compared with platinum electrode as technological reference.
Nowadays, the technology advancements of signal processing, low-voltage low-power circuits and miniaturized circuits have enabled the design of compact, battery-powered, high performance solutions for a wide range of, particularly, biomedical applications. Novel sensors for human biomedical signals are creating new opportunities for low weight wearable devices which allow continuous monitoring together with freedom of movement of the users. This paper presents the design and implementation of a novel miniaturized low-power sensor in integrated circuit (IC) form suitable for wireless electromyogram (EMG) systems. Signal inputs (electrodes) are connected to this application-specific integrated circuit (ASIC). The ASIC consists of several consecutive parts. Signals from electrodes are fed to an instrumentation amplifier (INA) with fixed gain of 50 and filtered by two filters (a low-pass and high-pass filter), which remove useless signals and noise with frequencies below 20 Hz and above 500 Hz. Then signal is amplified by a variable gain amplifier. The INA together with the reconfigurable amplifier provide overall gain of 50, 200, 500 or 1250. The amplified signal is then converted to pulse density modulated (PDM) signal using a 12-bit delta-sigma modulator. The ASIC is fabricated in TSMC0.18 mixed-signal CMOS technology.
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