MOS triangle-to-sine wave convertor based on subthreshold operation

Tang, Zheng; Ishizuka, Okihiko; Matsumoto, Hiroki

doi:10.1049/el:19901282

Cited by 14 publications

(7 citation statements)

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“…The circuitry is described in this section, and the electrode and packaging processes are described in §4. Many circuits for sinusoid frequencies have been reported, including a DSP-based solution [25], quadrate oscillators [26,27] and triangle-to-sine generators [28]. The drawback of the DSP-based solution is the large memory requirement for very low frequencies.…”

Section: Impedance Spectroscopy Methodsmentioning

confidence: 99%

High-throughput impedance spectroscopy biosensor array chip

Liu

Mason

2014

Phil. Trans. R. Soc. A.

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Impedance spectroscopy is a powerful tool for characterizing materials that exhibit a frequency dependent behaviour to an applied electric field. This paper introduces a fully integrated multi-channel impedance extraction circuit that can both generate AC stimulus signals over a broad frequency range and also measure and digitize the real and imaginary components of the impedance response. The circuit was fabricated in a 0.5 μm complementary metaloxide semiconductor. Tailored for cellular membrane interface characterization, the signal generator produces sinusoidal waves from 10 mHz to 10 kHz. To suit a variety of applications, the impedance extraction circuit provides a programmable current measurement range from 100 pA to 100 nA with a measured resolution of approximately 100 fA. Occupying only 0.045 mm 2 per measurement channel, the circuit is compact enough to include nearly 200 channels in a 3 × 3 mm 2 die area.

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Section: Impedance Spectroscopy Methodsmentioning

confidence: 99%

High-throughput impedance spectroscopy biosensor array chip

Liu

Mason

2014

Phil. Trans. R. Soc. A.

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“…The non-linear circuit-based sine wave synthesizer generates the sine waves using the non-linear characteristics of transistors. For example, a triangle wave is used and transformed to a sine wave using the sub-threshold-region characteristics of CMOS transistor [10], [11]. However, the accuracy of such transformation is usually poor and it is suffered from many harmonic distortions.…”

Section: A Two-step Impedance Spectroscopy (Imps) Circuitmentioning

confidence: 99%

An Impedance and Multi-Wavelength Near-Infrared Spectroscopy IC for Non-Invasive Blood Glucose Estimation

Song

Park

et al. 2015

IEEE J. Solid-State Circuits

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A multi-modal spectroscopy IC combining impedance spectroscopy (IMPS) and multi-wavelength near-infrared spectroscopy (mNIRS) is proposed for high precision non-invasive glucose level estimation. A combination of IMPS and mNIRS can compensate for the glucose estimation error to improve its accuracy. The IMPS circuit measures dielectric characteristics of the tissue using the RLC resonant frequency and the resonant impedance to estimate the glucose level. To accurately find resonant frequency, a 2-step frequency sweep sinusoidal oscillator (FSSO) is proposed: 1) 8-level coarse frequency switching (f STEP = 9.4 kHz) in 10-76 kHz, and 2) fine analog frequency sweep in the range of 18.9 kHz. During the frequency sweep, the adaptive gain control loop stabilizes the output voltage swing (400 mV p-p ). To improve accuracy of mNIRS, three wavelengths, 850 nm, 950 nm, and 1,300 nm, are used. For highly accurate glucose estimation, the measurement data of the IMPS and mNIRS are combined by an artificial neural network (ANN) in external DSP. The proposed ANN method reduces the mean absolute relative difference to 8.3% from 15% of IMPS, and 15-20% of mNIRS in 80-180 mg/dL blood glucose level. The proposed multi-modal spectroscopy IC occupies 12.5 mm 2 in a 0.18 µm 1P6M CMOS technology and dissipates a peak power of 38 mW with the maximum radiant emitting power of 12.1 mW.Index Terms-Adaptive gain control, artificial neural network, frequency sweep sinusoidal oscillator, impedance spectroscopy, near-infrared spectroscopy, non-invasive glucose monitoring.

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“…The development of the present approximation proceeds along empirical lines by comparing the truncated sine-series model of (1) (2) m-O where a is the electronic-component parameter that depends on its physical and dimensional properties. Closed-form analytical expressions other than (2) can also be used wherever appropriate.…”

Section: Proposed Approximationmentioning

confidence: 99%

An approximate analysis and its application to the nonlinear performance of three MOSFET transconductance amplifiers

Abuelma’atti

1995

Microelectronics Journal

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A simple procedure for approximating the input-output characteristic of non-linear electronic circuits is presented. Using this procedure, closed-form analytical expressions, in terms of the ordinary Bessel functions, are obtained for the output spectra of a non-linear electronic circuit resulting from a multisinusoidal input. Using these expressions, the non-linear performance of three basic MOSFET transconductance amplifiers is considered in an attempt to determine the transistor parameters for best linearity.

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MOS triangle-to-sine wave convertor based on subthreshold operation

Cited by 14 publications

References 0 publications

High-throughput impedance spectroscopy biosensor array chip

High-throughput impedance spectroscopy biosensor array chip

An Impedance and Multi-Wavelength Near-Infrared Spectroscopy IC for Non-Invasive Blood Glucose Estimation

An approximate analysis and its application to the nonlinear performance of three MOSFET transconductance amplifiers

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