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Characteristics Control of a Thickness Mode Piezoelectric Vibrator Using a Negative Impedance Converter Circuit  

황성필 (부경대학교 대학원 음향진동공학과)
김무준 (부경대학교 물리학과)
하강열 (부경대학교 물리학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.21, no.7, 2002 , pp. 600-605 More about this Journal
Abstract
In this paper, a Negative Impedance Converter (NIC) circuit was employed for the electro-mechanical characteristic control of a thickness mode piezoelectric vibrator. Two circular plane piezoelectric vibrators were bonded together and the NIC circuit was connected to one of the vibrators. The theoretical and experimental analysis of the characteristics shown that the quality factor and the electro-acoustic efficiency of the vibrator with the NIC circuit could be improved by 20 times and 2.5 times, respectively.
Keywords
Thickness mode piezoelectric vibrator; Negative impedance converter circuit; Quality factor;
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