Self-prevention of instability in a low-power microwave Ar plasma jet for biomedical applications

Conventional plasma jets for biomedical applications tend to have several drawbacks, such as high voltages, high gas delivery, large plasma probe volume, and the formation of discharge within the organ. Therefore, it is challenging to employ these jets inside a living organism’s body. Thus, we developed a single-electrode tiny plasma jet and evaluated its use for clinical biomedical applications. We investigated the effect of voltage input and flow rate on the jet length and studied the physical parameters of the plasma jet, including discharge voltage, average gas and subject temperature, and optical emissions via spectroscopy (OES). The interactions between the tiny plasma jet and five subjects (de-ionized (DI) water, metal, cardboard, pork belly, and pork muscle) were studied at distances of 10 mm and 15 mm from the jet nozzle. The results showed that the tiny plasma jet caused no damage or burning of tissues, and the ROS/RNS (reactive oxygen/nitrogen species) intensity increased when the distance was lowered from 15 mm to 10 mm. These initial observations establish the tiny plasma jet device as a potentially useful tool in clinical biomedical applications.

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A low power quadrature and divide-by-two frequency VCO design mixer with charge-injection for biomedical applications

2014 7th International Conference on Biomedical Engineering and Informatics ◽

10.1109/bmei.2014.7002841 ◽

2014 ◽

Cited By ~ 14

Author(s):

Wen-Cheng Lai ◽

Jhin-Fang Huang ◽

Pi-Gi Yang ◽

Chien-Ming Hsu ◽

Kuo-Lung Chen

Keyword(s):

Low Power ◽

Biomedical Applications ◽

Charge Injection

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Low-power microwave plasma source based on a microstrip split-ring resonator

IEEE Transactions on Plasma Science ◽

10.1109/tps.2003.815470 ◽

2003 ◽

Vol 31 (4) ◽

pp. 782-787 ◽

Cited By ~ 113

Author(s):

F. Iza ◽

J.A. Hopwood

Keyword(s):

Low Power ◽

Ring Resonator ◽

Microwave Plasma ◽

Plasma Source ◽

Split Ring Resonator ◽

Split Ring ◽

Power Microwave

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Syntheses in a low power microwave discharge II: Amorphous silicon nitride and polycrystalline silicon

Journal of Non-Crystalline Solids ◽

10.1016/0022-3093(83)90421-0 ◽

1983 ◽

Vol 57 (1) ◽

pp. 189-193 ◽

Cited By ~ 2

Author(s):

P.M. Jeffers ◽

S.H. Bauer

Keyword(s):

Silicon Nitride ◽

Low Power ◽

Amorphous Silicon ◽

Polycrystalline Silicon ◽

Microwave Discharge ◽

Amorphous Silicon Nitride ◽

Power Microwave

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A 1 V 2.5 μW fully-differential ASK demodulator with 12.5 pJ/bit FOM for ultra-low power biomedical applications

2017 IEEE 60th International Midwest Symposium on Circuits and Systems (MWSCAS) ◽

10.1109/mwscas.2017.8052923 ◽

2017 ◽

Author(s):

Seungyeob Baik ◽

Arup K. George ◽

Minkyu Je ◽

Junghyup Lee

Keyword(s):

Low Power ◽

Biomedical Applications ◽

Ultra Low Power ◽

Fully Differential

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A Low-Noise, Low-Power, Wide Dynamic Range Logarithmic Amplifier for Biomedical Applications

Journal of Circuits System and Computers ◽

10.1142/s0218126618501049 ◽

2018 ◽

Vol 27 (07) ◽

pp. 1850104 ◽

Cited By ~ 2

Author(s):

Yuwadee Sundarasaradula ◽

Apinunt Thanachayanont

Keyword(s):

Low Power ◽

Biomedical Applications ◽

Dynamic Range ◽

Supply Voltage ◽

Low Noise ◽

Power Supply Voltage ◽

Wide Dynamic Range ◽

Dc Offset ◽

Limiting Amplifier ◽

Logarithmic Amplifier

This paper presents the design and realization of a low-noise, low-power, wide dynamic range CMOS logarithmic amplifier for biomedical applications. The proposed amplifier is based on the true piecewise linear function by using progressive-compression parallel-summation architecture. A DC offset cancellation feedback loop is used to prevent output saturation and deteriorated input sensitivity from inherent DC offset voltages. The proposed logarithmic amplifier was designed and fabricated in a standard 0.18[Formula: see text][Formula: see text]m CMOS technology. The prototype chip includes six limiting amplifier stages and an on-chip bias generator, occupying a die area of 0.027[Formula: see text]mm2. The overall circuit consumes 9.75[Formula: see text][Formula: see text]W from a single 1.5[Formula: see text]V power supply voltage. Measured results showed that the prototype logarithmic amplifier exhibited an 80[Formula: see text]dB input dynamic range (from 10[Formula: see text][Formula: see text]V to 100[Formula: see text]mV), a bandwidth of 4[Formula: see text]Hz–10[Formula: see text]kHz, and a total input-referred noise of 5.52[Formula: see text][Formula: see text]V.

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