Imperial College London

DrLieuweLeene

Faculty of EngineeringDepartment of Electrical and Electronic Engineering

Research Associate
 
 
 
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Contact

 

lieuwe.leene11 CV

 
 
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Location

 

B422Bessemer BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
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10 results found

Leene L, Constandinou TG, 2017, A 0.5V time-domain instrumentation circuit with clocked and unclocked ΔΣ operation, IEEE International Symposium on Circuits and Systems (ISCAS), Publisher: IEEE, Pages: 2619-2622, ISSN: 2379-447X

This paper presents a time-domain instrumentation circuit with exceptional noise efficiency directed at using nanometre CMOS for next generation neural interfaces. Current efforts to realize closed loop neuromodulation and high fidelity BMI prosthetics rely extensively on digital processing which isnot well integrated with conventional analogue instrumentation. The proposed time-domain topology employs a differential ring oscillator that is put into feedback using a chopper stabilized low noise transconductor and capacitive feedback. This realization promises better digital integration by extensively using time encoded digital signals and seamlessly allows both clocked & unclocked ΔΣ behavior which is useful on-chip characterizationand interfacing with synchronous systems. A 0.5V instrumentation system is implemented using a 65nm TSMC technology to realize a highly compact footprint that is 0.006mm2 in size. Simulation results demonstrate an excess of 55 dB dynamic range with 3.5 Vrms input referred noise for the given 810nW total system power budget corresponding to an NEF of 1.64.

CONFERENCE PAPER

Leene LB, Constandinou TG, 2017, A 0.016 mm(2) 12b Delta Sigma SAR With 14 fJ/conv. for Ultra Low Power Biosensor Arrays, IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, Vol: 64, Pages: 2655-2665, ISSN: 1549-8328

JOURNAL ARTICLE

Leene LB, Constandinou TG, 2017, Time Domain Processing Techniques Using Ring Oscillator-Based Filter Structures, IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, Vol: 64, Pages: 3003-3012, ISSN: 1549-8328

JOURNAL ARTICLE

Szostak K, Mazza F, Maslik M, Feng P, Leene L, Constandinou TGet al., 2017, Microwire-CMOS Integration of mm-Scale Neural Probes for Chronic Local Field Potential Recording, IEEE Biomedical Circuits and Systems (BioCAS) Conference, Publisher: IEEE, Pages: 492-495

CONFERENCE PAPER

Elia M, Leene LB, Constandinou TG, 2016, Continuous-Time Micropower Interface for Neural Recording Applications, IEEE International Symposium on Circuits and Systems (ISCAS), Publisher: IEEE, Pages: 534-537, ISSN: 0271-4302

CONFERENCE PAPER

Leene LB, Constandinou TG, 2016, A 2.7 mu W/MIPS, 0.88GOPS/mm(2) Distributed Processor for Implantable Brain Machine Interfaces, 12th IEEE Biomedical Circuits and Systems Conference (BioCAS), Publisher: IEEE, Pages: 360-363, ISSN: 2163-4025

CONFERENCE PAPER

Leene LB, Constandinou TG, 2016, A 0.45V Continuous Time-Domain Filter using Asynchronous Oscillator Structures, 23rd IEEE International Conference on Electronics, Circuits and Systems (ICECS), Publisher: IEEE, Pages: 49-52

CONFERENCE PAPER

Faliagkas K, Leene LB, Constandinou TG, 2015, A Novel Neural Recording System Utilising Continuous Time Energy Based Compression, IEEE International Symposium on Circuits and Systems (ISCAS), Publisher: IEEE, Pages: 3000-3003, ISSN: 0271-4302

CONFERENCE PAPER

Leene LB, Constandinou TG, 2014, Ultra-low power design strategy for two-stage amplifier topologies, ELECTRONICS LETTERS, Vol: 50, Pages: 583-584, ISSN: 0013-5194

JOURNAL ARTICLE

Leene LB, Luan S, Constandinou TG, 2013, A 890fJ/bit UWB transmitter for SOC integration in high bit-rate transcutaneous bio-implants, IEEE International Symposium on Circuits and Systems (ISCAS), Publisher: IEEE, Pages: 2271-2274, ISSN: 0271-4302

CONFERENCE PAPER

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