Programmable-Gain Capacitive Feedback TIA for Low-Noise Applications in CMOS

Romanova, Agata; Barzdėnas, Vaidotas

doi:10.1109/estream50540.2020.9108857

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…To overcome this limitation, the capacitive feedback TIA (CF-TIA) presents itself as a viable alternative. The CF-TIA theoretically offers an equivalent gain and bandwidth performance compared to the RF-TIA [16,17]. Moreover, the CF-TIA mitigates thermal noise and addresses the challenge of integrating high resistance with CMOS technology, rendering it an advantageous choice for implementing low-noise CMOS TIAs [18,19].…”

Section: Introductionmentioning

confidence: 99%

A Low-Power High-Sensitivity Photocurrent Sensory Circuit with Capacitive Feedback Transimpedance for Photoplethysmography Sensing

Mohan,

Awwad,

Albastaki

et al. 2024

Sensors

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This study presents an integrated analog front-end (AFE) tailored for photoplethysmography (PPG) sensing. The AFE module introduces a novel transimpedance amplifier (TIA) that incorporates capacitive feedback techniques alongside common drain feedback (CDF) TIA. The unique TIA topology achieves both high gain and high sensitivity while maintaining low power consumption. The resultant PPG sensor module demonstrates impressive specifications, including an input noise current of 4.81 pA/sqrt Hz, a transimpedance gain of 18.43 MΩ, and a power consumption of 68 µW. Furthermore, the sensory system integrates an LED driver featuring automatic light control (ALC), which dynamically adjusts the LED power based on the strength of the received signal. Employing 0.35 µm CMOS technology, the AFE implementation occupies a compact footprint of 1.98 mm × 2.475 mm.

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Section: Introductionmentioning

confidence: 99%

A Low-Power High-Sensitivity Photocurrent Sensory Circuit with Capacitive Feedback Transimpedance for Photoplethysmography Sensing

Mohan,

Awwad,

Albastaki

et al. 2024

Sensors

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Frequency-Compensated Bulk-Driven TIA Suitable for Low-Voltage Low-Power Applications

Bansal

Raj

2020

J CIRCUIT SYST COMP

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The importance of a transimpedance amplifier in an optical transceiver is very well known. In this paper, a novel CMOS design of the bulk-driven transimpedance amplifier (BD-TIA) is given where the bridge-shunt peaking-based frequency compensation technique is exploited to improve frequency response. A pre-existing active inductor has been used for the same. The electrical characteristics and functioning of this inductor simulator make it a suitable alternative to both floating and grounded spiral inductors. In order to verify the workability of the proposed circuit, it has been simulated with TSMC CMOS 0.18[Formula: see text][Formula: see text]m process parameters. The proposed circuit is useful in low-voltage low-power VLSI applications as it uses a single supply of 0.75[Formula: see text]V. The power consumption of BD-TIA is very low, being 0.37[Formula: see text]mW, because a standard MOSFET has been replaced by a bulk-driven MOSFET (BDMOS), while the 3-dB bandwidth is observed to be 4.5[Formula: see text]GHz. The mathematical investigation and small signal analysis show that the simulation results are in good agreement.

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Programmable-Gain Capacitive Feedback TIA for Low-Noise Applications in CMOS

Cited by 2 publications

References 17 publications

A Low-Power High-Sensitivity Photocurrent Sensory Circuit with Capacitive Feedback Transimpedance for Photoplethysmography Sensing

A Low-Power High-Sensitivity Photocurrent Sensory Circuit with Capacitive Feedback Transimpedance for Photoplethysmography Sensing

Frequency-Compensated Bulk-Driven TIA Suitable for Low-Voltage Low-Power Applications

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