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A 2.7- $\mu$ W Neuromodulation AFE With 200 mVpp Differential-Mode Stimulus Artifact Canceler Including On-Chip LMS Adaptation
2018 Edition, Volume 1, October 1, 2018 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We present a 65-nm CMOS neuromodulation SoC with a stimulus artifact canceler allowing simultaneous recording and stimulation. A first-order ${\Delta \Sigma }$ -modulated switched capacitor DAC injects artifact canceling charges at the LNA input,...

An 2.7μW Neuromodulation AFE with 200mVpp Differential-Mode Stimulus Artifact Canceller Including On-Chip LMS Adaptation
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We present a 65nm CMOS neuromodulation SoC with a stimulus artifact canceller allowing simultaneous recording and stimulation. A 1st order Σ-modulated switched capacitor DAC injects artifact cancelling charges at the LNA input, handling up to...

A 0.01 mm2 Mostly Digital Capacitor-less AFE for Distributed Autonomous Neural Sensor Nodes
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This letter presents a miniaturized neural recording analog front-end (AFE) suitable for distributed sub-mm neural recording implants. Including reference generators, this AFE occupies an area of only 0.01 mm2, thanks to a mostly digital architecture with more...

A TDM-Based 16-Channel AFE ASIC with Enhanced System-Level CMRR for Wearable EEG Recording with Dry Electrodes
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A multi-channel analog front-end (AFE) ASIC for wearable EEG recording application is presented in this paper. Two techniques, namely chopping stabilization (CS) and time-division-multiplexing (TDM) are combined in a unified manner to improve the input-referred noise and the system level...

A Low-Power Current-Reuse Analog Front-End for High-Density Neural Recording Implants
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Studying brain activity in vivo requires collecting bioelectrical signals from several microelectrodes simultaneously in order to capture neuron interactions. In this work, we present a new current-reuse analog front-end (AFE), which is scalable to very large numbers of recording channels,...

An AFE for Catheter-Based IEGM sensing with Inverter-based SAR ADC
2019 Edition, October 1, 2019 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

An analog front-end (AFE) which contains a 1.2 V reconfigurable sensor amplifier and an inverter-based SAR ADC is presented in this paper. This sensor chip will be applied for a multi-electrodes catheter-based system for sensing intracardiac signals. The gain and...

Low-Power High-Input-Impedance EEG Signal Acquisition SoC with Fully Integrated IA and Signal-Specific ADC for Wearable Applications
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a low-power high-input-impedance analog-front-end (AFE) design including an instrumentational-amplifier (IA) and a neural-signal-specific ADC (NSS-ADC) for continuous acquisition of electroencephalography (EEG) signals. In the proposed AFE,...

A High TCMRR, Inherently Charge Balanced Bidirectional Front-End for Multichannel Closed-Loop Neuromodulation
2019 Edition, October 1, 2019 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper describes a multichannel bidirectional front-end for implantable closed-loop neuromodulation. Stimulation artefacts are reduced by way of a 4-channel H-bridge current source sharing stimulator front-end that minimizes residual charge drops in the electrodes via topology-inherent...

A 16-Channel CMOS Chopper-Stabilized Analog Front-End ECoG Acquisition Circuit for a Closed-Loop Epileptic Seizure Control System
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this paper, a 16-channel analog front-end (AFE) electrocorticography signal acquisition circuit for a closed-loop seizure control system is presented. It is composed of 16 input protection circuits, 16 auto-reset chopper-stabilized capacitive-coupled instrumentation amplifiers (AR-CSCCIA)...

A Current-Mode Capacitively-Coupled Chopper Instrumentation Amplifier for Biopotential Recording with Resistive or Capacitive Electrodes
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a high-density, low-noise analog front-end (AFE) for capacitively-coupled neural recording applications. Conventional capacitively-coupled AFEs, when chopper-stabilized, require large coupling capacitors or servo loops to minimize 1/f² input-referred noise and...

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