Design a Bioamplifier with High CMRR

Hsiao, Yu-Ming; Shiau, Miin-Shyue; Li, Kuen-Han; Hou, Jing-Jhong; Hsu, Heng-Shou; Wu, Hsien‐Tsai; Liu, Don‐Gey

doi:10.1155/2013/210265

Cited by 15 publications

(6 citation statements)

References 9 publications

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“…This study presents a high-gain, high common-mode rejection ratio (CMRR), and low-noise folded cascode op [21]. Furthermore, a low-noise amplifier was achieved by using a differential pair and minifying the transistor size [19].…”

Section: Simulated and Measured Resultsmentioning

confidence: 99%

A One-Dimensional Magnetic Chip with a Hybrid Magnetosensor and a Readout Circuit

2018

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This work presents a one-dimensional magnetic chip composed of a hybrid magnetosensor and a readout circuit, which were fabricated with 0.18 μm 1P6M CMOS technology. The proposed magnetosensor includes a polysilicon cross-shaped Hall plate and two separated metal-oxide semiconductor field-effect transistors (MOSFETs) to sense the magnetic induction perpendicular to the chip surface. The readout circuit, which comprises a current-to-voltage converter, a low-pass filter, and an instrumentation amplifier, is designed to amplify the output Hall voltage with a gain of 43 dB. Furthermore, a SPICE macro model is proposed to predict the sensor’s performance in advance and to ensure sufficient comprehension of the magnetic mechanism of the proposed magnetosensor. Both simulated and measured results verify the correctness and flexibility of the proposed SPICE macro model. Measurements reveal that the maximum output Hall voltage VH, the optimum current-related magnetosensitivity SRI, the optimum voltage-related magnetosensitivity SRV, the averaged nonlinearity error NLE, and the relative bias current Ibias are 4.381 mV, 520.5 V/A·T, 40.04 V/V·T, 7.19%, and 200 μA, respectively, for the proposed 1-D magnetic chip with a readout circuit of 43 dB. The averaged NLE is small at high magnetic inductions of ±30 mT, whereas it is large at low magnetic inductions of ±30 G.

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Section: Simulated and Measured Resultsmentioning

confidence: 99%

A One-Dimensional Magnetic Chip with a Hybrid Magnetosensor and a Readout Circuit

2018

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“…A differential bio-amplifier [5,6] will be connected at the output of the designed analog MUX, and used to amplify the selected bioelectrical signal. The differential operational amplifier (OPAMP) [7] with a three-stage structure can achieve a high CMRR and good gain for better amplifying the weak bio-signals. This design is based on IBM 130nm integrated circuit technology, and all the components are highly integrated into a 1mm 2 layout area.…”

Section: Contributionmentioning

confidence: 99%

“…In this section, a three stage bio-signal amplifier topology [7] is introduced, which is used to connect to the differential outputs of the 8 to 1 analog MUX to reduce the common mode interferences and amplify the received low amplitude output signals. Table 11, respectively.…”

Section: Three Stage Bio-signal Amplifiermentioning

confidence: 99%

“…To amplify the differential output signals of the MUX and reduce the common mode interference, a three-stage bio-amplifier topology [7] is introduced with high CMRR and high voltage gain.…”

Section: Thesis Summarymentioning

confidence: 99%

“…Schematic of three stage bio-signal amplifier[7].The amplifier symbol and its pin description are shown in theFigure 4.19 and…”

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confidence: 99%

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A Low Power 8 to 1 Analog Multiplexer for Bio-Signal Acquisition System with a Function of Amplification

Wang

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This thesis proposes an ultra low power 8-1 analog multiplexer (MUX) which can deal with low voltage amplitude and low frequency bio-signal, the analog MUX is implemented in IBM 130 nm integrated circuit technology. Also, a bio-signal amplifier with low power consumption, high CMRR, and high gain is connected to the output port of the multiplexer.In this way, the bio-signals can be easily detected and selected.The challenge of this design is how to transfer such low frequency and low amplitude bio-electricity signals from the input port to the output port with low loss, and low distortion.For the analog multiplexer design, a parallel transmission gate structure is used to select the desired signal while keeping the power consumption of the eight-channel analog multiplexer to 807nW. For the amplifier design, a three-stage differential operational amplifier structure was used to amplify the weak bio-signal which passed through the transmission gate structures. The amplifier was designed with a high CMRR 106dB and reasonable gain of 66dB.iii

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Amplifier to Strengthen the Microvolt Signal for Biomedical Sensors

Chaitanya

Puviarasi

2021

Emerging Technologies in Data Mining and Information Security

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Design a Bioamplifier with High CMRR

Cited by 15 publications

References 9 publications

A One-Dimensional Magnetic Chip with a Hybrid Magnetosensor and a Readout Circuit

A One-Dimensional Magnetic Chip with a Hybrid Magnetosensor and a Readout Circuit

A Low Power 8 to 1 Analog Multiplexer for Bio-Signal Acquisition System with a Function of Amplification

Amplifier to Strengthen the Microvolt Signal for Biomedical Sensors

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