Experimental Study of AM and PM Noise in Cascaded Amplifiers

Badillo, Ignacio Algredo; Portilla, J.

doi:10.3390/electronics11030470

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…An instrumentation amplifier with low noise performance is added as input stage. The gain of the instrumentation amplifier helps the overall noise to decrease [53]. A total of 9 OTA's were used for the 4 blocks.…”

Section: Ecg Acquisition System Designmentioning

confidence: 99%

Design and Analysis of a High Gain, Low-Noise and Low-Power Analog Front End for ECG Acquisition in 45nm Technology Using Gm/Id Method

Emon,

Salim,

Chowdhury

2024

Preprint

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In this work, an analog front-end (AFE) circuit for Electrocardiogram (ECG) detection system has been designed, implemented, and investigated in an industry-standard Cadence simulation framework using advanced technology node of 45 nm. The AFE consists of an instrumentation amplifier, a Butterworth band-pass filter (with fifth-order low-pass and second-order high-pass sections), and a second-order notch filter- all are based on two-stage, Miller-compensated operational transconductance amplifiers (OTA). The OTAs have been designed employing the $g_m/I_D$ methodology. Both the pre-layout and post-layout simulation were carried out. The layout consumes an area of 0.0058 mm$^2$ without the resistors and capacitors. Analysis of various simulation results were carried out for the proposed AFE. The circuit demonstrates a post-layout bandwidth of 239 Hz with a variable gain between 44 to 58 dB, a notch depth of -56.4 dB at 50.1 Hz, a total harmonic distortion (THD) of -59.65 dB (less than 1\%), an input referred noise spectral density of $

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Section: Ecg Acquisition System Designmentioning

confidence: 99%

Design and Analysis of a High Gain, Low-Noise and Low-Power Analog Front End for ECG Acquisition in 45nm Technology Using Gm/Id Method

Emon,

Salim,

Chowdhury

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…An instrumentation amplifier with low noise performance is added as the input stage. The gain of the instrumentation amplifier helps the overall noise to decrease [56]. A total of nine OTAs are used for the four blocks.…”

Section: Ecg Acquisition System Designmentioning

confidence: 99%

Design and Analysis of a High-Gain, Low-Noise, and Low-Power Analog Front End for Electrocardiogram Acquisition in 45 nm Technology Using gm/ID Method

Emon,

Salim,

Chowdhury

2024

Electronics

View full text Add to dashboard Cite

In this work, an analog front-end (AFE) circuit for an electrocardiogram (ECG) detection system has been designed, implemented, and investigated in an industry-standard Cadence simulation framework using an advanced technology node of 45 nm. The AFE consists of an instrumentation amplifier, a Butterworth band-pass filter (with fifth-order low-pass and second-order high-pass sections), and a second-order notch filter—all are based on two-stage, Miller-compensated operational transconductance amplifiers (OTA). The OTAs have been designed employing the gm/ID methodology. Both the pre-layout and post-layout simulation are carried out. The layout consumes an area of 0.00628 mm2 without the resistors and capacitors. Analysis of various simulation results are carried out for the proposed AFE. The circuit demonstrates a post-layout bandwidth of 239 Hz, with a variable gain between 44 and 58 dB, a notch depth of −56.4 dB at 50.1 Hz, a total harmonic distortion (THD) of −59.65 dB (less than 1%), an input-referred noise spectral density of <34 μVrms/Hz at the pass-band, a dynamic range of 52.71 dB, and a total power consumption of 10.88 μW with a supply of ±0.6 V. Hence, the AFE exhibits the promise of high-quality signal acquisition capability required for portable ECG detection systems in modern healthcare.

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