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David Duperray

from Redwood City, CA
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Also known as:
David Dupurray
Phone and address:
2433 Oregon Ave, Redwood City, CA 94061
(650) 474-2945
Related to:
Christelle M Duperray, 51
Connected to:
Jeffrey R Duperre, 53Justin J Duperre, 36Yolanda M Duperret, 58Allen D Duperron, 68Barbara F Duperron, 80Mark E Duperron, 68Patricia A Duperron, 75Sally A Duperron, 75Dorothy M Dupert, 89Marshall E Dupert, 63

David Duperray Phones & Addresses

  • 2433 Oregon Ave, Redwood City, CA 94061 (650) 474-2945 (650) 679-8019
  • 1261 Truman St, Redwood City, CA 94061 (650) 474-2945
  • 7212 Via Correto Dr, Austin, TX 78749 (650) 283-6443
  • 5935 Lomita Verde Cir, Austin, TX 78749 (512) 288-0578
  • 730 Evelyn Ave, Sunnyvale, CA 94086
  • 455 Mountain Laurel Ct, Mountain View, CA 94043 (650) 988-8676

Work

Company: St-ericsson Mar 2009 Position: Rfic design lead for cellular transceiver

Education

Degree: MSEE School / High School: IFSIC-Rennes 1991 to 1993 Specialities: Electrical Engineering

Skills

Algorithms • GSM • Bluetooth • RF • PLL • IC • Analog • UMTS • LNA • SoC • CMOS • SiGe • Semiconductors • Verilog • EDA • VCO • Mobile Devices • Optimizations • WLAN • Wireless • Cellular Communications • CDMA2000 • Mixed Signal • Microelectronics • Integrated Circuit Design • ASIC

Industries

Semiconductors

Resumes

Resumes

David Duperray Photo 1

Rfic Design Lead At St-Ericsson

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Position:
RFIC design lead for Cellular transceiver at ST-Ericsson
Location:
Austin, Texas Area
Industry:
Semiconductors
Work:
ST-Ericsson since Mar 2009
RFIC design lead for Cellular transceiver
ST-NXP Wireless Feb 2008 - Feb 2009
65nm SoC architect for UWB
NXP Semiconductors Dec 2006 - Jan 2008
RFIC Architect Lead for a 45nm Bluetooth CMOS transceiver
Philips Semiconductors Jan 2005 - Nov 2006
RFIC Architect for 90nm CMOS WLAN transceivers
Philips Semiconductors Jan 2003 - Dec 2005
RFIC Design Engineer
Education:
IFSIC-Rennes 1991 - 1993
MSEE, Electrical Engineering
Skills:
Algorithms
GSM
Bluetooth
RF
PLL
IC
Analog
UMTS
LNA
SoC
CMOS
SiGe
Semiconductors
Verilog
EDA
VCO
Mobile Devices
Optimizations
WLAN
Wireless
Cellular Communications
CDMA2000
Mixed Signal
Microelectronics
Integrated Circuit Design
ASIC

Publications

Us Patents

Transmitter With A Sliding Compression Point

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US Patent:
6507244, Jan 14, 2003
Filed:
May 29, 2001
Appl. No.:
09/866906
Inventors:
David Duperray - Sunnyvale CA
Assignee:
Koninklijke Philips Electronics N.V. - Eindhoven
International Classification:
H03G 320
US Classification:
330136, 330 10, 330149
Abstract:
A transmitter has a power amplifier amplifying a radio frequency transmit signal. The radio frequency transmit signal is a non-constant envelope modulated signal. The power amplifier has a first compression point. In a method for sliding a compression point in the transmitter, the power amplifier is operated at a first backoff from the first compression point such that a given adjacent channel power ratio requirement is met for a first peak-to-average ratio of the radio frequency transmit signal. The first compression point is slide to a second compression point for a second peak-to-average ratio of the radio frequency transmit signal, the second compression point being lower than the first compression point. The first and second peak-to-average ratios are dependent on information content of the non-constant envelope modulated signal.

Distortion/Efficiency Adaptation In A Variable-Data-Rate Radio Transmitter

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US Patent:
7593699, Sep 22, 2009
Filed:
Jun 25, 2004
Appl. No.:
10/562133
Inventors:
David B. Duperray - Mountain View CA, US
Assignee:
NXP B.V. - Eindhoven
International Classification:
H04B 1/04
H04K 1/02
US Classification:
4551142, 4551151, 4551271, 455126, 375296
Abstract:
The present invention generally speaking, provides for adaptive control of an RF power amplifier in view of a desired data rate. For low data rates, the RF amplifier () is controlled so as to allow significant output signal distortion, at the same time operating within a region of increased efficiency of the RF power amplifier. For higher data rates, the RF amplifier () is controlled so as to reduce the output signal distortion. During such times, lower efficiency of the RF power amplifier is attained. Efficiency of the RF power amplifier () is thus maximized in view of data rate requirements. In the case of battery-powered radio transmitter, increased efficiency results in longer battery life. In a specific embodiment, an on-the-fly calibration is performed in which output signal distortion is measured. A precalculated table stores information relating output signal distortion to expected Error Vector Magnitude (EVM) at the radio receiver.

Tunable Cascode Lna With Flat Gain Response Over A Wide Frequency Range

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US Patent:
7786806, Aug 31, 2010
Filed:
Sep 8, 2005
Appl. No.:
11/575065
Inventors:
David Duperray - Redwood City CA, US
Assignee:
NXP B.V. - Eindhoven
International Classification:
H03F 3/04
US Classification:
330311, 330302
Abstract:
A cascode LNA circuit is provided with a tuned inductive load. The circuit shows a flat response over a wide frequency range.

Tunable Lc Oscillator With Common Mode Voltage Adjustment

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US Patent:
8604889, Dec 10, 2013
Filed:
Nov 7, 2008
Appl. No.:
12/743177
Inventors:
David L. Duperray - Austin TX, US
Assignee:
NXP B.V. - Eindhoven
International Classification:
H03B 1/00
US Classification:
331167, 331117 FE, 331117 R, 331177 V
Abstract:
An LC oscillator is provided that achieves improved phase noise performance. A variable frequency oscillator includes a variable supply source, an oscillator tank circuit, a variable capacitance circuit comprising MOS switches, and an oscillator tank voltage common mode adjustment circuit. When the capacitance of the variable capacitance circuit is varied to vary an output frequency of the variable frequency oscillator, the common mode voltage is adjusted to reduce transitions of the MOS switches between an inversion state and a depletion state during excursions of an output signal through one cycle of oscillation.

Transmitter With Transmitter Chain Phase Adjustment On The Basis Of Pre-Stored Phase Information

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US Patent:
20030095608, May 22, 2003
Filed:
Nov 16, 2001
Appl. No.:
09/993985
Inventors:
David Duperray - Sunnyvale CA, US
Assignee:
KONINKLIJKE PHILIPS ELECTRONICS N.V.
International Classification:
H04K001/02
H04L025/03
H04L025/49
US Classification:
375/297000
Abstract:
A transmitter chain has a quadrature modulator, a variable gain amplifier, an up-converter, and a variable gain power amplifier. An overall phase of the transmitter chain is adjusted on the basis of pre-stored phase information reflecting phase changes due to simultaneous gain changes of gains of at least the variable gain amplifier and the variable gain power amplifier.

Wireless Tranceiver Configuration With Self-Calibration For Improved Out Of Band Interferer Rejection

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US Patent:
20080233893, Sep 25, 2008
Filed:
Jul 28, 2006
Appl. No.:
11/997197
Inventors:
David Duperray - Redwood City CA, US
Assignee:
NXP B.V. - Eindhoven
International Classification:
H04B 1/40
US Classification:
455 77
Abstract:
The present wireless transceiver includes a tuneable narrow band LNA which rejects dramatically any out of band interferers. The tuneable narrow band LNA may be operable over a wide frequency band. A loopback calibration procedure is used to control the tuneable narrow band LNA so as to produce a substantially flat gain characteristic over the band of interest.

2G, 2.5G Rf Loopback Arrangement For Mobile Device Self-Testing

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US Patent:
20130084852, Apr 4, 2013
Filed:
Sep 29, 2011
Appl. No.:
13/248106
Inventors:
David DUPERRAY - Austin TX, US
Assignee:
ST-ERICSSON SA - Plan-les-Ouates
International Classification:
H04W 24/00
US Classification:
455425
Abstract:
In a mobile communication device a loopback technique is used to enable the receive chain circuitry and digital baseband block to perform self tests on the transmit chain circuitry of the same mobile communication device for 2G and 2.5G operating Bands and channels. A transmit chain circuit is set to transmit a selected receive Band channel, which is attenuated via a loopback path within the mobile communication device's front end module and, in some embodiments, via a leakage signal path between adjacent or proximate LNA inputs of separate receive chain circuits.
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David Duperray from Redwood City, CA Get Report