Patents by Inventor Nicolas Sornin

Nicolas Sornin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20110267164
    Abstract: An inductor structure comprising: a first loop and a second loop; a first feed line connected to a first end of the first loop and a second feed line connected to a first end of the second loop, each of the first and second feed lines extending through an area circumscribed by one of the first and second loops; and a crossover section adjacent to the first end of the first loop and the first end of the second loop, the crossover section coupling the first loop to the second loop so as to cause current flowing from the first feed line to the second feed line to circulate around the first loop in a first rotational direction and around the second loop in a second rotational direction opposite to the first rotational direction.
    Type: Application
    Filed: August 27, 2009
    Publication date: November 3, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Timothy John Newton, Nicolas Sornin, Johan Lucas Gertenbach
  • Publication number: 20110204938
    Abstract: A charge pump circuit for connection to another circuit via an output node (614) of the charge pump and for causing a current to flow either into or out of the other circuit via the output node in dependence on a current output by first and second current paths (601, 602) in the charge pump, each current path comprising a current source and a current control device having two switched nodes, one switched node being arranged to receive a current from the current source, and a control node arranged to control a current flow between the first and second switched nodes in dependence on a voltage at the control node, the current control devices of the first and second paths being of the same type such that they are responsive to the same polarity of voltage at their control node to be conducting between their switched nodes, the charge pump further comprising a capacitive element (609, 610) having first and second capacitive plates and a switching arrangement (604-606, 611) arranged such that, during a first time
    Type: Application
    Filed: March 5, 2009
    Publication date: August 25, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20110098012
    Abstract: A radio transmitter includes a transmitter circuit having a transmission output and being configured to generate at the transmission output a signal for transmission; a reference voltage circuit configured to generate a substantially temperature-invariant reference voltage; a reference signal circuit having a reference output and being configured to receive the substantially temperature-invariant voltage generated by the reference voltage circuit and to generate at the reference output an oscillating reference signal of an amplitude that is derived from the temperature-invariant reference voltage; an amplitude sensor having an input and being configured for sensing the amplitude of a signal at the input and generating a sensed amplitude signal indicative of the sensed amplitude; and control apparatus configured to control the radio transmitter to operate in each of: a) a first mode in which it causes the input of the amplitude sensor to be coupled to the reference output; and b) a second mode in which it caus
    Type: Application
    Filed: April 13, 2010
    Publication date: April 28, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventor: Nicolas Sornin
  • Publication number: 20110025386
    Abstract: A loop filter for a phase-locked loop that generates an output signal having a predetermined phase relationship with a reference signal, the loop filter being arranged to control a signal generator that forms the output signal in dependence on a phase error between the output signal and the reference signal by outputting a control signal for controlling the signal generator in dependence thereon, the loop filter being arranged to form the control signal to comprise a proportional component representative of an instantaneous magnitude of the phase difference and an integral component representative of an integral of the phase difference, the loop filter comprising a proportional path arranged to receive a signal representative of the instantaneous magnitude of the phase difference and form the proportional component of the control signal in dependence thereon and an integral path arranged to receive a signal representative of the instantaneous magnitude of the phase difference and form the integral component o
    Type: Application
    Filed: March 5, 2009
    Publication date: February 3, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20110025387
    Abstract: A phase-locked loop arranged to generate an output signal having a first frequency that is a static value times the frequency of a reference signal, the phase-locked loop comprising a signal generator arranged to generate the output signal, a divider arranged to receive the output signal and divide the output signal to form a feedback signal, the divider being arranged to vary the divisor by which the output signal is divided to cause the output signal to have a frequency that is said static value times the frequency of the reference signal, a comparison unit arranged to compare the feedback signal with the reference signal, one or more current generators arranged to output current pulses in dependence on said comparison, a summation unit arranged to receive the current pulses output by the current generator(s) and form a single current pulse therefrom and a loop filter arranged to filter the single current pulse to form a control signal for controlling the signal generator, the phase-locked loop being arrang
    Type: Application
    Filed: March 4, 2009
    Publication date: February 3, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20110025388
    Abstract: A current generator for a phase-locked loop arranged to generate an output signal having predetermined frequency-relationship with a reference signal, the phase-locked loop comprising a signal generator arranged to generate the output signal, a divider arranged to receive the output signal and divide the output signal to form a feedback signal, the divider being arranged to vary the divisor by which the output signal is divided, a comparison unit arranged to compare the feedback signal with the reference signal and output a first error signal indicative of the phase-difference between the feedback signal and the reference signal to the current generator and a loop filter arranged to filter a current signal output by the current generator to form a control signal for controlling the signal generator, the current generator being capable of receiving the first error signal and generating a current in dependence thereon, receiving a second error signal indicative of an error in the feedback signal caused by the v
    Type: Application
    Filed: March 5, 2009
    Publication date: February 3, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20110019767
    Abstract: A phase-locked loop having: an oscillator for forming an oscillating output signal; a frequency divider connected to receive the output of the oscillator and frequency divide it by a value dependent on a division control signal; and a phase comparator for comparing the phase of the divided signal and a reference signal to generate a control signal, the operation of the oscillator being dependent on the control signal; the output data to form a divided signal a division ratio controller configured to, when clocked by an input signal, generate a series of output data for forming the division control signal; the phase-locked loop having: a first mode of operation in which the frequency divider is operable to frequency divide the output of the oscillator by a value dependent on the output of the division ratio controller; and a second mode of operation in which the frequency divider is not operable to frequency divide the output of the oscillator by a value dependent on the output of the division ratio controller
    Type: Application
    Filed: March 13, 2009
    Publication date: January 27, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20110012652
    Abstract: A loop filter for receiving an input signal indicative of a phase-difference between a reference signal and a signal output by a signal generator and forming a control signal for controlling the signal generator in dependence thereon, the loop filter comprising a plurality of filter components that determine the frequency response of the filter, said filter components being arranged so that a first set of said components determines one or more zeros of the filter's frequency response and a second set of said components determines one or more poles of the filter's frequency response, each of said first and second sets of filter components being independent of the other such that the zero(s) and pole(s) of the filter's frequency response may be selected independently.
    Type: Application
    Filed: March 5, 2009
    Publication date: January 20, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20100321075
    Abstract: A phase-locked loop for generating an output signal that has a predetermined frequency relationship with a reference signal, the phase-locked loop comprising a signal generator arranged to generate the output signal, a charge pump arranged to generate current pulses for controlling the signal generator, two control units for controlling a duration of the current pulses generated by the charge pump and a selection unit arranged to select either the first control unit or the second control unit to control the charge pump, wherein a first one of the control units is arranged to continuously monitor a phase-difference between the reference signal and a feedback signal formed from the output signal and to, when selected by the selection unit, control the charge pump to output a current pulse having a duration that is dependent on that phase-difference and a second one of the control units is arranged to, when selected by the selection unit, control the charge pump to output a current pulse of predetermined duratio
    Type: Application
    Filed: March 5, 2009
    Publication date: December 23, 2010
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20100301961
    Abstract: A phase locked loop comprising: an oscillator for generating an output signal of a frequency that is dependent on an input to the oscillator; sampling means for generating a sequence of digital values representing the output of the oscillator at moments synchronised with a reference frequency; a difference unit for generating a feedback signal representing the difference between successive values in the sequence; and an integrator for integrating the difference between the feedback signal and a signal of a desired output frequency; the signal input to the oscillator being dependent on the output of the integrator.
    Type: Application
    Filed: August 19, 2008
    Publication date: December 2, 2010
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Michael Story, Nicolas Sornin
  • Publication number: 20100295715
    Abstract: A sigma-delta modulator for forming a digital output signal representative of a voltage level of an input signal, the sigma delta modulator having a node arranged to receive a current flow that is representative of the voltage level of the input signal and on whose voltage the digital output signal is dependent, the sigma-delta modulator comprising a plurality of capacitive elements for smoothing the current flow, each capacitive element being connected at one end to the node and at its other end to a respective switch unit and a plurality of switch units, each switch unit being arranged to connect the respective one of the capacitive elements to either a first voltage level or a second voltage level in dependence on the voltage at the node so as to provide feedback that affects the voltage at the node.
    Type: Application
    Filed: August 7, 2008
    Publication date: November 25, 2010
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Nicolas Sornin, Davide Orifamma
  • Publication number: 20100264978
    Abstract: System for converting a radiofrequency signal SRX so as to recover encoded information carried by the signal SRX, includes generating elements arranged to generate a signal SLO, mixing elements (3) arranged to generate a signal SRX-LO by mixing the signal SRX with the signal SLO, an analog/digital converter arranged to convert the signal SRXLO into a digital signal SRX-LO-Num, a device generating an error correction digital signal SCor, the device being arranged so that the signal SCor reflects the phase gap between the phase of the signal SLO and a phase setpoint, the phase setpoint being the phase of an ideal signal S0, ideal for recovering the encoded information carried by the signal SRX, combining elements arranged to generate the signal S0?Num by combining the signal SRX-LO-Num with the signal SCor. A system for converting a digital signal so as to send a radiofrequency analog signal carrying the information of the digital signal is also described.
    Type: Application
    Filed: November 21, 2008
    Publication date: October 21, 2010
    Applicant: NANOSCALE LABS
    Inventors: Nicolas Sornin, Laurent Perraud
  • Publication number: 20090075621
    Abstract: A mixer for downconversion of RF signals includes at least one RF transistor (305); at least one switching pair (303) connected to the drain current (301) of the at least one RF transistor (305); and a common mode sensing component (300) configured to detect deviations in the common mode output of the switching pair (303) from a specified output; wherein the deviations modify the current of the at least one switching pair (303).
    Type: Application
    Filed: September 13, 2007
    Publication date: March 19, 2009
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Niels Christoffers, Nicolas Sornin
  • Patent number: 7043206
    Abstract: An offset correction analogic circuit capable of compensating the offset of a digital baseband is described. The circuit comprises analog means to receive an output differential signal issued from a differential signal path. The differential signal path may be a baseband filter as used in digital communication systems. The baseband filter inputs an input differential signal having an offset to be compensated. The output differential signal is fed into an analog integrator to generate a pulsed signal either on a first output line or on a second output line according to the polarity of the output differential signal. The pulsed signal is then integrated into a switched capacitor and a differential compensation offset signal is issued. The frequency of the pulsed signal is preferably proportional to the voltage value of the output differential signal. The compensation offset signal may be summed with the input differential signal into a summing circuit.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: May 9, 2006
    Assignee: International Business Machines Corporation
    Inventors: Cheryl Herdey, Shane Kaiser, Hung-Chuan Pai, Laurent Perraud, Nicolas Sornin, Gerald J. Twomey
  • Patent number: 6825713
    Abstract: A system for estimating the bandwidth of a baseband filter that produces a phase shift on arriving analog signals is disclosed. The system comprises means for generating a digital reference clock signal and means for converting the digital reference clock signal into an analog reference clock signal to be input to the baseband filter. Phase comparison means are coupled to the baseband filter for comparing the digital reference clock signal to the analog reference clock signal phase shifted through the baseband filter. A digital pulsed signal that is representative of the phase shift is generated, and digital circuit means connected to the phase comparison means convert the digital pulsed signal into a digital value, the digital value being proportional to the phase shift of the baseband filter.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: November 30, 2004
    Assignee: International Business Machines Corporation
    Inventors: Frederic Benoist, Pascal Conteaux, Laurent C. Perraud, Christophe Pinatel, Nicolas Sornin
  • Publication number: 20030154231
    Abstract: A system for estimating the bandwidth of a baseband filter that produces a phase shift on arriving analog signals is disclosed. The system comprises means for generating a digital reference clock signal and means for converting the digital reference clock signal into an analog reference clock signal to be input to the baseband filter. Phase comparison means are coupled to the baseband filter for comparing the digital reference clock signal to the analog reference clock signal phase shifted through the baseband filter. A digital pulsed signal that is representative of the phase shift is generated, and digital circuit means connected to the phase comparison means convert the digital pulsed signal into a digital value, the digital value being proportional to the phase shift of the baseband filter.
    Type: Application
    Filed: December 11, 2002
    Publication date: August 14, 2003
    Inventors: Frederic Benoist, Pascal Conteaux, Laurent C. Perraud, Christophe Pinatel, Nicolas Sornin
  • Publication number: 20030098734
    Abstract: An offset correction analogic circuit capable of compensating the offset of a digital baseband is described. The circuit comprises analog means to receive an output differential signal issued from a differential signal path. The differential signal path may be a baseband filter as used in digital communication systems. The baseband filter inputs an input differential signal having an offset to be compensated. The output differential signal is fed into an analog integrator to generate a pulsed signal either on a first output line or on a second output line according to the polarity of the output differential signal. The pulsed signal is then integrated into a switched capacitor and a differential compensation offset signal is issued. The frequency of the pulsed signal is preferably proportional to the voltage value of the output differential signal. The compensation offset signal may be summed with the input differential signal into a summing circuit.
    Type: Application
    Filed: October 25, 2002
    Publication date: May 29, 2003
    Inventors: Cheryl Herdey, Shane Kaiser, Hung-Chuan Pai, Laurent Perraud, Nicolas Sornin, Gerald J. Twomey
  • Patent number: 6518903
    Abstract: A Sigma Delta A/D converter architecture which allows the multiplexed conversion of several high bandwidth analog signals.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: February 11, 2003
    Assignee: International Business Machines Corporation
    Inventors: Laurent C. Perraud, Jean-Olivier Plouchart, Mehmet Soyuer, Nicolas Sornin