Marc H. Ryat

*** ***** ** ***** *********** : French

***** ** **** ** ******* Marital status : single

France

Telephone : (33-661-***-*** Email : acxpp4@r.postjobfree.com MAIN QUALIFICATIONS & SKILLS

Analog microelectronics : 25 years experience in CMOS / BICMOS analog IC design applied to various areas (audio, medical, consumer, disk-drives, power management).

Familiar with IC design CAD tools from Cadence mostly (Analog Artist / Spectre), and practice of scientific programming & modeling using VerilogA, Matlab, Perl-Tk.

Proven innovativeness : over 20 issued U.S. patents.

MSEE and BSEE from the ISEN Electronics Institute, Lille (France). EMPLOYMENT HISTORY & MOST RELEVANT EXPERIENCE

● 07/2005 – Present Principal analog design engineer Portable audio & power management ICs (0.25μm / 0.18μm CMOS) ON Semiconductor, Toulouse (France)

A 4V-24V, 10W, divide-by-2 charge pump in BCD technology. All-NMOS power switch design with bootstrap, 95% efficiency and selectable 100mΩ pass-through mode.

A 4V-10V, 14W, divide-by-2 charge pump in high voltage CMOS. All-NMOS power switch design using a bootstrap circuit requiring no Schottky diode, featuring automatic frequency adjustment for optimum efficiency over a wide range of load currents.

Several precision current sensing circuits designed for 10mΩ sensing resistor values, all based on the autozero principle ("ping-pong", interleaving or track-&-hold) applied to battery charger ICs, "fuel gauge" or DC-DC conversion circuits and with gain trim. US patent 8,570,095 for autozero active load.

– NCP2991 : A 1.2W class AB bridge audio amplifier with 8Ω driving capability, short (30ms) turn-on time and high PSRR. Features novel pop-and-click suppression mechanism (US patent # 7,915,953) and is compatible with both single-ended & differential inputs. Also a fully differential version of the same circuit. 1

– NCP2817 : A true-ground class AB audio amplifier for headsets with integrated charge pump, for battery voltages from 1.6V to 5V. Offers enhanced pop suppression, low quiescent current (1.6mA) and high PSRR

(100dB).

– NCS2632 : A true-ground class AB audio line driver with integrated charge pump (for set-top boxes, Notebook PCs, DVD players Drives up to 3Vrms into 600Ω with no pop-and-click and has auto- calibrated offset. THD+N < 1m% typ, supply voltage range 2.2V to 5.5V. Also features high PSRR (90dB)

& crosstalk (110dB), with integrated 8kV IEC protection (contact discharge).

– Other blocks / functions : a class G audio amplifier, a 4th order modulator for a 16 bit audio ADC, a high PSRR bandgap reference, a 400mA LDO, ... a 2-pin only bidirectional digital interface for EPROM, allowing programming, configuring and testing of an IC via two fully multiplexed I/O pins.

● 01/2004 – 06/2005 Senior analog IC design engineer Power management & human interface products (0.8μm CMOS) Semtech Ltd, Southampton (UK)

– A 5V very low output voltage linear FET controller, with a 1% output accuracy over temperature, very fast transient response, and able to drive an N-channel power FET for up to 5A load currents. Compatible with all ceramic capacitors, also features power good monitoring, user selectable dropout voltage and undervoltage / overcurrent protection of its output.

– A CPU temperature and power monitoring chip, able to sense and convert into digital the supply voltage and current of a processor, as well as local and remote temperatures, with computation of a moving average of power consumption. Based on a converter design, programmable through a 2-wire SMBus interface with trimmable functions for offset and gain calibration. Design includes complete analog layout, as well as development of GUI and test routines using Perl-Tk & GnuPlot for pc-based control of bench test.

● 10/2002 – 12/2003 Senior analog IC design engineer Disk-drive read channel devices (0.12μm BICMOS)

Infineon Semiconductor, Santa Cruz (CA) & Villach (Austria) Redesign work on wideband VGA, miscellaneous cell development (chopper compensated bandgap, low- power LDO

● 05/2002 – 07/2002 Senior analog IC design engineer Medical implants (Cardiac Rythm Management products) St-Jude Medical, Sunnyvale (CA)

Left due to air conditioning related illness

● 05/2001 – 04/2002 Research sabbatical in the US & in France (a project in number theory)

● 01/1997 – 04/2001 Senior analog IC design engineer Medical implants (Cardiac Rythm Management products) - low-power, switched-capacitor circuits in 0.8μm to 0.18μm CMOS St-Jude Medical, Sunnyvale (CA) & Stockholm (Sweden)

– A 9-bit second-order modulator used as the front-end of a MEMS capacitive sensor-based accelerometer, for patient activity and position monitoring. Typical consumption : 100nA. Designed in 2

several versions for 3 different technologies (from 0.8 m to 0.25 m), accurately simulated with MATLAB and verified with Cadence’s Analog Artist / SPECTRE. Full switched-capacitor design, switching performed at 2kHz for a 30Hz signal bandwidth. Also includes offset and gain calibration circuitry and procedure in software.

– A high linearity VCO with an input dynamic range of 100 V to 50mV. Maximum offset : 100 V. Consumption : 100nA (Switched-capacitor design clocked at 2kHz).

– A generator of bandgap and regulated supplies for a pacemaker / defibrillator system. Includes own clock generator, calibration circuitry, fault detection, Power-On-Reset, high-drive class AB output buffers. Most functions switched-capacitor based. Consumption : 300nA for a maximum 500 A load.

– Modifications / redesigns of other circuits (a GMR sensor circuit, some oscillators).

● 09/1995 – 12/1996 Senior analog IC design engineer Disk-drive MR preamp devices (1.2μm BICMOS)

SGS-THOMSON Microelectronics, San Jose (CA)

A multichannel MR read preamplifier and thin-film write circuit for hard-disk drives. 110MHz bandwidth

(37 MR resistance) and 0.8nV/ Hz total input-referred voltage noise. Short (< 1 s) write-to-read recovery time, digitally programmable gain, several fault detections. Also redesigned with modified architecture and performance (220MHz bandwidth, 0.65nV/ Hz voltage noise for a 25 MR sensor value, and other features).

● 04/1995 – 08/1995 Senior analog IC design engineer Disk-drive read channel devices (0.8μm BICMOS)

Philips-Signetics, Sunnyvale (CA)

– A 50-250MHz delay-locked-loop used as a digitally programmable delay line for a write-precomp circuit

(200-700ps steps adjustment).

– An 8-bit charge-redistribution A-to-D converter with 600ns sampling + conversion time, fully differential signal and full-scale inputs and programmable bipolar / unipolar conversion modes.

– An 8-bit current-summing D-to-A converter with differential output (~ 80ns conversion time).

● 11/1993 – 10/1994 Analog IC design engineer

Serial digital video / telecom applications (0.8μm BICMOS) Comlinear, Inc, Fort Collins (CO)

– An adaptive cable equalizer able to reconstruct serial digital video data from a 0 to 300m long cable with less than 300ps residual jitter, for data rates up to 360Mb/sec. Includes tunable continuous-time filter block, and improved method for removal of baseline wander effects caused by AC coupling (US pat. 5,978,417). Now part of the National Semiconductor / Comlinear signal processing product line as the CLC014.

– A 10-bit serial digital video encoder performing the functions of parallel-to-serial conversion, scrambling, NRZ-to-NRZI conversion and sync detection. Design completed to the point of PLL analysis and verification with a time-step simulator written in C.

● 05/1990 – 10/1993 Analog IC design engineer

3

Disk-drives and consumer electronics (R&D, standard cell development – 3μm BICMOS)

SGS-Thomson Microelectronics, Grenoble (France) and San Jose (CA) from 03/1992

– R&D (see patent list) :

- sub-3V, rail-to-rail class AB operational amplifier design techniques

- low-distortion transconductors

- nonlinear / computational circuits

– Analog cell design (cells used as parts of ASICs, or as elements of standard cell libraries) :

- Operational amplifiers :

Class AB, low-supply rail-to-rail, power, auto-zero, wideband, low-noise.

- Comparators :

CMOS or bipolar, high-speed ECL, auto-zero, with programmable hysteresis.

- Variable-gain amplifiers and voltage multipliers : Precision, high-linearity, low-supply, digitally programmable.

- Regulators :

Low-supply and low-dropout, series bandgap.

- Oscillators and timers :

RC, Pierce Crystal, voltage-controlled, one-shots.

- Miscellaneous :

Multiplexers, peak detectors, track-and-hold, bandgap references, thermal shutdown, photodiode transimpedance amplifier.

● 11/1989 – 04/1990 Analog IC design engineer

Defense ASIC systems (1GHz bipolar)

Contracting for ESD Inc (St Quentin en Yvelines, France) A 110MHz voltage-feedback op amp with 200V/ s slew rate, an ECL comparator and a fast analog switch for a bipolar ASIC.

● 08/1988 – 04/1989 Design engineer

Cardiac implants – CMOS layout work only

ELA Medical Inc (Montrouge, France)

Analog cell layout & development of automated, parametrized layout macros for various transistor types. 4

EDUCATION

BSEE, ISEN Electronics Institute (Institut Superieur d’Electronique du Nord), Lille, France (1987) MSEE, University of Sciences of Villeneuve d’Ascq, France (1988) FOREIGN LANGUAGES : English (read, written & spoken), German (mostly read & written) ISSUED US PATENTS

8,570,095 Offset-compensated active load and method 8,471,628 Amplifier with reduced output transients and method therefor 7,915,953 Amplifier circuit and method therefor

7,054,687 Method and apparatus for position and motion sensing 6,356,085 Method and apparatus for converting capacitance to voltage 6,134,060 Current bias, current sense for magneto-resistive preamplifier 6,081,396 Magnetic read/write head that detects open and short-circuits 5,978,417 Adaptive cable equalizer

5,825,167 Linear transconductors

5,498,953 HCM based transconductor circuits

5,498,952 Precise current generator

5,481,180 PTAT current source

5,471,132 Logarithmic and exponential converter circuits 5,459,430 Resistor ratioed current multiplier/divider 5,448,158 PTAT current source

5,446,457 Current-summing digital-to-analog converter with binarily weighted current sources 5,444,361 Wideband linear and logarithmic signal conversion circuits 5,389,894 Power amplifier having high output voltage swing and high output drive current 5,349,304 Operational amplifier having multiple positive inputs 5,323,120 High swing operational transconductance amplifier 5,294,893 Differential output amplifier input stage with rail-to-rail common mode input range 5,294,892 Two-stage rail-to-rail class AB operational amplifier 5,293,136 Two-stage rail-to-rail operational amplifier 5,208,552 Rail-to-rail operational transconductance amplifier TECHNICAL / SCIENTIFIC INTERESTS

Artifical intelligence

Neural networks

Vision & visual intelligence

Bioelectronics

Emergence / Swarm phenomena / Population dynamics / Collective intelligence Evolution

July 2016

5

Contact this candidate