François Krummenacher

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An application specific integrated circuit (ASIC) named ANTIGONE (ANalog To dIGital cONvErter) was designed in AMS 0.35 mu m technology to interface with four Ion-sensitive field-effect transistor (ISFET) sensors and perform real-time monitoring of some bi ...

This paper presents a switched-capacitor simulator, optimized for fast computations. Two CAD tools are implemented in order to perform Monte-Carlo simulations, to identify sensitive parasitic coupling prior to layout and to rapidly verify parasitic couplin ...

This paper presents a new analytical method to simply estimate the integrated thermal noise in switched-capacitor filters (SCF). It is shown how the Bode theorem, which is theoretically valid only for continuous-time passive filters, can be extended to als ...

This paper explores the potential of VeFETs for mixed-signal circuits. A new physics-based compact DC model of the VeSFET operated in subthreshold region is presented and used to derive 1st-order sensitivities of the device threshold voltage to process var ...

We present a radiation-tolerant 120 dB dynamic-range interface circuit for ionization chambers and diamond detectors. The device consists of a multi-scale continuous-time incremental charge-to-digital converter paired with a temperature-compensated current ...

In this paper, an optimal filter design procedure is described, from the equation representing the behaviour of a ΣΔ modulator to a functional algorithm. The first section shows the design of an optimal filter for a first-order ΣΔ ADC with a constant input. Next, an algorithm for a time-varying input is detailed. The last algorithm allows an optimal decoding of high-resolution ADCs without an SH circuit.

This paper introduces some design and measurement techniques that were used in the design and the testing of an ASIC for ultra-low current sensing. The idea behind this paper is to present the limitations in sub-picoampere current measurements and demonstr ...

This paper presents a new modeling methodology accounting for generation and propagation of minority carriers that can be used directly in circuit-level simulators in order to estimate coupled parasitic currents. The model is based on a new compact model o ...

An ultra-low leakage current Application Specific Integrated Circuit (ASIC) called Utopia (Ultralow Picoammeter) has been designed and fabricated in AMS 0.35 mu m CMOS, in order to be used as the front-end for ionising radiation monitoring at CERN. It is b ...

We present the latest developments and some preliminary results on High-Voltage MOSFET modelling at EPFL. A novel physics-based compact model is derived for the drift region. It includes velocity saturation and Poisson equation in a self consistent formalism. Next, this drift extension has been combined with a non-uniformly doped MOSFET compact model for the low voltage section of the device. The complete model has been implemented in Verilog-A language. Evaluation against TCAD simulations and actual measur

A fully integrated, area-efficient and ultra-low power management system for micro-power solar energy harvesting applications is proposed. This system harvests energy from miniaturised solar cells connected in series to charge a rechargeable microbattery. ...

We propose a design oriented charge-based model for undoped DG MOSFETs under symmetrical operation that aims at giving a comprehensive understanding of the device from the design strategy. In particular, we introduce useful normalizations for current and c ...

A physics-based compact model including short-channel effects (SCEs) is presented for undoped (or lightly doped) symmetric double-gate (DG) MOSFETs. Our approach allows an accurate description of the device behavior down to 60 nm with a simple set of equat ...

The High-Voltage MOSFET is used in a wide variety of applications covering from power systems up to RF-IC. Compact models that describe the high-frequency behavior of the device are required to predict high-frequency operation and switching capabilities of ...

This paper presents a compact- and a macro-model for estimating and simulating the perturbations induced in the substrate by high-voltage transistors switching inductive loads. On one hand, it allows the designer to predict the amount of switching noise ge ...

This paper describes an optimal filter design procedure for a cascaded sigma-delta modulator, starting with a block schematic of a second-order topology and deriving step by step the optimal decoder. The presented filter enhances the resolution of the MASH ...

This work presents an ultra-low power oscillator designed to target different contexts, such as crystal-assisted time keeping, reference oscillator to optimize the always on domain of a microcontroller or wake-up timer. This oscillator enables ultra-low po ...

François Krummenacher

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A programmable low-power ADC interface for an ISFET sweat sensor used in a wearable multi-sensing system

CAD tools for fast analysis of parasitic coupling and mismatch effects in switched-capacitor circuits

Simple thermal noise estimation of OTA-based switched-capacitor filters

Towards circuit design using VeSFETs

A 120 dB dynamic-range radiation-tolerant charge-to-digital converter for radiation monitoring

Optimal filtering of incremental first-order sigma-delta modulators with sweep input

Design and Measurement Methodology for a Sub-picoampere Current Digitiser

A circuit-level substrate current model for smart-power ICs

A front-end ASIC for ionising radiation monitoring with femto-amp capabilities

Recent Developments on the EPFL-High Voltage MOSFET Model (EPFL-HVMOS)

Fully integrated ultra-low power management system for micro-power solar energy harvesting applications

A Basic Property of MOS Transistors and its Circuit Implications

A Design Oriented Charge-based Current Model for Symmetric DG MOSFET and its Correlation with the EKV Formalism

Variability of Low Frequency Noise and mismatch in CORNER DOPED and standard CMOS technology

Explicit compact model for symmetric double-gate MOSFETs including solutions for small-geometry effects

RF Compact Modeling of High-voltage MOSFETs

Substrate current modeling for high-voltage smart power BCD technology

Optimal filtering of an incremental second-order MASH11 sigma-delta modulator

A nA Crystal - Less Oscillator for Internet of Things

An EKV-based high voltage MOSFET model with improved mobility and drift model