隨著人口老化趨勢愈來愈明顯，在這老化的社會中，老年人跌倒一直是一個頭痛的議題。其主要原因來自於人體感知神經的敏銳度降低。人體感知神經會隨著年齡增長、身體疾病等因素造成退化，因此需要更大的外界訊號刺激才有所反應。近年來有眾多研究証實，隨機共振理論可應用於提升人體自身平衡，當施加一亂數雜訊於腳底，可提升人體偵測身體傾斜的能力。然而這些研究所提出的平衡提升裝置皆相當龐大或耗電，不適合於行走時使用。本論文研究為利用隨機共振理論，設計出一套可攜式自我平衡提升裝置，其振動強度可大範圍調整且所耗功率甚低。
內文一開始將說明壓電致動器的選取與量測，証明其低功耗特性。接著介紹如何採用訊號產生器、電源供應器、差分放大器，完成平衡提升裝置雛型，經証實其確有助於增進自身平衡感。最後設計出低頻亂數雜訊致動器驅動電路與20V升壓電路，並將其整合進同一晶片中，取代大型儀器實現可攜式化，經由量測証實電路性能與預期規格皆相符。
本晶片採用TSMC 0.25μm 1P3M標準製程實現，晶片面積為1.402mm×1.900mm。

Falls are deadly issue for elders in this aging society. The prime cause of fall-related accidents is the degrading of proprioceptors, which severes with the age increasing or by physical diseases, so the elders need larger outside signal to excite their proprioceptors.
The technique of applying stochastic resonance on cutaneous sensation to improve sensory function has been well developed for many years. The particular phenomenon of stochastic resonance can enhance the detection of weak signals, when applying the random vibration on the sole of foot. However, the balance- enhanceing devices from the papers are not suitable for carry because of their huge size or more power comsumption. Therefore, we design a portable self balance- enhanceing device with low power consumption and it has widely adjustble range of the vibration intensity.
In this thesis, we verified that the piezoelectric actuator is a low power consumption material by our experiment. The model of balance- enhanceing device which is composed of function generator, power supply, and differential amplifier is described, and we also verified that this system can improve the performance of the human balance control system. Finally, we designed a 20V boost converter and a low frequency random noise driver for piezoelectric actuator in a single chip, and the measurement result of the circuit are identical with expectation.
The chip was fabricated in TSMC 0.25μm 1P3M CMOS technology, and the total area of the integrated circuit is 1.402mm×1.900mm.

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