本文將分成兩個部分，第一部分將設計一種低耗能的儲能電路使獵能器能夠更加廣泛的被使用。無線感測器已在現代生活中日趨重要，由於它們使用方式與場合，替這些裝置更換電池可能是一件較困難的任務。因此，擁有自動觸發儲能電路的獵能器將會被廣泛使用，所以本文將設計出符合負載且擁有自動觸發儲能電路的儲能電路。第二部分將提出使用低頻強化電路優化壓電揚聲器的低頻響應問題。由於行動電話、數位電視的薄型化、小型化技術進步迅速，薄型揚聲器應運而生。但是，壓電材料本身因為低頻響應問題失真高、聲音尖銳，所以本文的目標為製作低頻強化電路並改善壓電式揚聲器的音頻響應。
最後本文成功設計出低耗能的自動觸發儲能電路使獵能器能夠更加方便的被使用。並且藉由電路改善壓電揚聲器低頻不佳的情況，比起一般常見電路可以改善大約10dB。

Thesis is divided into two parts, the first part of thesis the design of a tank circuit for energy harvester can be capable of being used more widely. Wireless sensor is increasingly important in life. Because they use the occasion to replace the batteries for these devices is a difficult and impractical task. Therefore, the automatic triggering of the tank circuit for energy harvester can be widely used. This thesis will be designed to meet the load and has a storage tank circuit automatically trigger circuit. The second part will present the use of bass boost circuit to optimize its low-frequency response. As mobile phones, digital TVs thin, rapid advances in miniaturization technology, thin speaker emerged. However, the piezoelectric material itself is a problem because of the low-frequency response distortion high, shrill sound, the purpose of thesis is production bass boost circuit. Bass boost circuit can improve the low-frequency response and improve the piezoelectric speaker audio response.
Finally, the successful design the automatic triggering of the tank circuit for energy harvester can be more convenient to use. Piezoelectric speaker low-frequency is improved by circuit. Compared to commonly circuit can be increased by about 10dB.

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