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- W2794704502 abstract "This paper presents a novel frequency-shift readout system with offset cancellation OPA (operational amplifier) for biosensing applications. The chopper technique is used to up-modulate the offset voltage to a higher frequency for noise shaping. A low pass filter is then utilized to filter out the noise caused by offset. A FPW (flexural plate wave) biosensor to sense the THC (Tetrahydrocannabinol), the signature ingredient of marijuana, concentration in urine. The linearity of the proposed system is proved to be 0.959 based on physical experiments where the THC concentration is 0 ∼ 160 ng/mL." @default.
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- W2794704502 date "2018-01-01" @default.
- W2794704502 modified "2023-09-26" @default.
- W2794704502 title "A frequency-shift readout system with offset cancellation OPA for portable devices of marijuana detection" @default.
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- W2794704502 doi "https://doi.org/10.1109/icce.2018.8326071" @default.
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