Are you Chi-Shen Wang?

Claim your profile

Publications (2)1.36 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, a monolithic complimentary metal-oxide-semiconductor (CMOS) autocompensated sensor transducer for capacitive measuring systems is newly presented. The proposed converter is compact and robust to integrate in capacitive measuring systems. The proposed autocompensated sensor transducer is attractive due to the fact that a digitized signal is produced without realizing the analog-to-digital converter. Hence, the hardware cost could be reduced. Furthermore, the output signal of the proposed transducer is a pulse stream; it could be easily sent over a wide range of transmission media, such as package switch networks (PSNs), radios, and optical, infrared (IR), and ultrasonic media. Another innovation is that the proposed automatic compensation circuits enhance and compensate the linear relation between the variable capacitance of the detected sensor and the output digital frequency over a wide dynamic frequency range. Measurement results have successfully verified the functions and the performance of the proposed autocompensated sensor transducer and confirmed that it is possible to apply it to the air pressure sensor. The area of this chip is 940 times 1080 mum2, and the power consumption is 6.4 mW. The proposed transducer is not only suitable for capacitive measuring systems but also practical for application in the front-end systems of the wireless sensor network.
    IEEE Transactions on Instrumentation and Measurement 01/2008; 57:2472-2486. · 1.36 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In this work, a capacitive signal conditioner of a CMOS integrated capacitance-to-frequency converter with digital compensation circuit designed for sensor interface applications is newly proposed. The proposed converter has the low cost feature. That is due to that the output signal of the proposed converter is a digitized signal produced without realizing the analog to digital converter. Hence, the hardware cost could be reduced. Besides, the output of the proposed converter is a pulse stream, it could be easily sent over a wide range of transmission media, such as PSN, radio, optical, IR, ultrasonic, and etc. Based upon 0.35 um 2P4M CMOS technology, measurement results have successfully verified the correct functions and performance of the integrated capacitance-to-frequency converter with digital compensation circuit designed for sensor interface applications. The area of this fabricated chip is 940 times 1080 um<sup>2</sup> and the power consumption is 6.4 mW. The proposed converter is not only suitable for capacitive measurement systems, but also applications of demanding wide dynamic output frequency range.
    Sensors, 2007 IEEE; 12/2007