Journal ArticleDOI
A Low-Power, Wide-Dynamic-Range Semi-Digital Universal Sensor Readout Circuit Using Pulsewidth Modulation
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TLDR
A low-power, low complexity, and wide-dynamic-range universal sensor readout circuit that converts the sensing capacitance or resistance changes to digital duty cycles based on pulsewidth modulation (PWM) is presented.Abstract:
We present a low-power, low complexity, and wide-dynamic-range universal sensor readout circuit that converts the sensing capacitance or resistance changes to digital duty cycles based on pulsewidth modulation (PWM). The readout circuit utilizes a RC-controlled pulse generator and produces pulse signals whose duration width is proportional to the charging time. The circuit is comprised of complementary CMOS circuit that enables the proposed design to consume significantly less power compared with traditional designs. The proposed design is universal and can be configured according to the application requirements. The sensor interface chip is designed and fabricated in TSMC 0.13-μm CMOS technology. The proposed interface achieves 13-aF to 10.7-nF capacitance and 5-Ω to 11.5-MΩ resistance sensing ranges with 60- μW power consumption. The functionality of the full circuit, including circuit analysis, noise analysis and measurement results, has been demonstrated.read more
Citations
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Journal ArticleDOI
A Reconfigurable Smart Sensor Interface for Industrial WSN in IoT Environment
TL;DR: A new method is proposed to design a reconfigurable smart sensor interface for industrial WSN in IoT environment, in which complex programmable logic device (CPLD) is adopted as the core controller and the standard of IEEE1451.2 intelligent sensor interface specification is adopted.
Journal ArticleDOI
A Fully-Analog Lock-In Amplifier With Automatic Phase Alignment for Accurate Measurements of ppb Gas Concentrations
TL;DR: In this paper, a fully-analog lock-in amplifier for the accurate measurements of low quantities of gas in sensor applications is presented, which is optimized to operate at a specified reference frequency, in particular 77 Hz.
Journal ArticleDOI
A Low-Power Interface for Capacitive Sensors With PWM Output and Intrinsic Low Pass Characteristic
TL;DR: A compact, low power interface for capacitive sensors, is described,where the output signal is a pulse width modulated (PWM) signal, where the pulse duration is linearly proportional to the sensor differential capacitance.
Journal ArticleDOI
Novel Modified De-Sauty Autobalancing Bridge-Based Analog Interfaces for Wide-Range Capacitive Sensor Applications
TL;DR: In this article, the authors proposed novel fully analog uncalibrated readout circuits for wide-range capacitance estimation based on a modified De-Sauty ac bridge configuration where two capacitances and two resistances are employed.
Journal ArticleDOI
A Feedback Controlled MEMS Nanopositioner for On-Chip High-Speed AFM
TL;DR: In this paper, a two-degree-of-freedom microelectromechanical system nanopositioner for on-chip atomic force microscopy (AFM) is presented.
References
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Book
Design of Analog CMOS Integrated Circuits
TL;DR: The analysis and design techniques of CMOS integrated circuits that practicing engineers need to master to succeed can be found in this article, where the authors describe the thought process behind each circuit topology, but also consider the rationale behind each modification.
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Design of integrated circuits for optical communications
TL;DR: This book systematically takes the reader from basic concepts to advanced topics, establishing both rigor and intuition in the design of high-speed integrated circuits for optical communication systems.
Journal ArticleDOI
A programmable intraocular CMOS pressure sensor system implant
TL;DR: A programmable intraocular pressure sensor system implant integrated on a single CMOS chip that contains on-chip micromechanical pressure sensor array, a temperature sensor, readout and calibration electronics, a µC-based digital control unit, and an RF-transponder, thus making batteryless operation feasible.
Journal ArticleDOI
Intraocular Pressure Monitoring Sensors
TL;DR: The basic operating principles of various implantable sensors are reviewed and categorized into groups to delineate their differences and key design questions are proposed for future progress.
Journal ArticleDOI
A generic multielement microsystem for portable wireless applications
TL;DR: System features such as active power management, the intramodule sensor bus, generic bus interface circuitry, and in-module sensor compensation based on bivariate polynomials are discussed.