Publications de Shafqat Ali | EPFL Graph Search

A DAC Mismatch Calibration Technique for Multibit Sigma Delta Modulators

Pierre-André Farine, Steve Tanner, Shafqat Ali

A technique for the calibration of DAC (digital to analog converter) mismatch errors in multi-bit Sigma Delta modulators (SDM) is presented. It consists of two parts: the first is a measurement technique to obtain the relative mismatch of each feedback DAC ...

Ieee2013

Multi-bit delta sigma modulator linearization based on digital reconstruction of feedback DAC output

Shafqat Ali

EPFL2013

Instrumented Knee Prosthesis for Force and Kinematics Measurements

Kamiar Aminian, Philippe Renaud, Pierre-André Farine, Peter Ryser, Catherine Dehollain, Arnaud Bertsch, Brigitte Jolles-Haeberli, Eric Meurville, Arash Arami, Steve Tanner

In this work, we present the general concept of an instrumented smart knee prosthesis for in-vivo measurement of forces and kinematics. This system can be used for early monitoring of the patient after implantation and prevent possible damage to the prosth ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Instrumented Prosthesis for Knee Implants Monitoring

Kamiar Aminian, Philippe Renaud, Pierre-André Farine, Peter Ryser, Catherine Dehollain, Arnaud Bertsch, Eric Meurville, Brigitte Jolles-Haeberli, Arash Arami, Steve Tanner

In this work we present an instrumented smart knee prosthesis for in-vivo measurement of forces and kinematics. Studying the constraints, we designed minimal sensory systems to be placed in the polyethylene part of the prosthesis. The magnetic sensors and ...

IEEE2011

A Novel 1V, 24μW, ∑∆ Modulator Using Amplifier & Comparator Based Switched Capacitor Technique, with 10-kHz Bandwidth and 64dB SNDR

Pierre-André Farine, Steve Tanner, Shafqat Ali

A new technique, Amplifier and Comparator Based Switched Capacitor (ACBSC) for low voltage switched cap circuits, is presented. ACBSC combines the recently introduced CBSC (comparator based switched capacitor circuit) with an amplifier. The current sources ...

2010