| Summary: | 碩士 === 中原大學 === 電子工程研究所 === 93 === Using the electrical stimulation as human medical therapy in recent years is mainly divided into two fields of treatment, which include decreasing the pain and recovering the function of organ. The former extensively uses with TENS and AL-TENS; the latter is that FES is the most famous. This paper will analyze and study parameters of electrical stimulation for both fields. Besides, this paper will propose a new structure of electrical stimulation to meet the specifications of parameters for medical therapy.
Due to over skin electrical stimulating system, stimulator needs higher electric current and higher output loading impedance. Hence, this paper proposes a new current driven circuit, which is different from CMOS circuit which is not able to drive high current (above 2mA). It especially adopts high power and high current property of bipolar transistor. CMOS and bipolar transistors are integrated into this circuit to distinguish itself. This circuit is simulated through TSMC 0.35um 3p3m BiCMOS parameters and pass CIC tapeout review meeting. Via chip measured value, it can reach 10mA of output current, which is enhanced 5 times of current quantity. It is verified to functional work by measured data.
The conventional over skin electrical stimulating system uses transformer to enhance impedance to match skin impedance. It has not only drawback of low wave form rising time but also larger IC board to place itself. The proposed new electrical stimulating system changes to Charged Pump circuit. Via simulating data of paper, it is verified to enhance loading impedance. We can combine charge pump circuit and new current driven circuit together and make them to a chip. With packaging this chip and electrode together, this a brand new electrical stimulating system is called as electrical stimulating paster
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