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: 20130093483
    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: December 10, 2012
    Publication date: April 18, 2013
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Patent number: 8379770
    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: Grant
    Filed: November 21, 2008
    Date of Patent: February 19, 2013
    Assignee: Nanoscale Labs
    Inventors: Nicolas Sornin, Laurent Perraud
  • Patent number: 8373468
    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: Grant
    Filed: March 5, 2009
    Date of Patent: February 12, 2013
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Patent number: 8373464
    Abstract: A phase-locked loop circuit comprising: an oscillator (20) configured to generate an output signal; an input (25) for receiving a reference clock signal; a delay cell (26) configured to delay the reference clock signal to generate a delayed reference clock signal; a phase comparator (27) configured to generate a quantized signal indicative of the phase difference between the output signal and the delayed reference clock signal, an integrator (28) configured to integrate the quantized signal to form an integrated signal; a first feedback path (22) configured to control the phase and/or frequency of the oscillator in dependence on the integrated signal; and a second feedback path (23) configured to adjust the delay applied by the delay cell (26) in dependence on the integrated signal.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: February 12, 2013
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Nicolas Sornin
  • Patent number: 8331880
    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: Grant
    Filed: April 13, 2010
    Date of Patent: December 11, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Nicolas Sornin
  • Patent number: 8330510
    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: Grant
    Filed: March 5, 2009
    Date of Patent: December 11, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Patent number: 8319534
    Abstract: A phase-locked loop comprising; an oscillator configured to output an oscillating signal in dependence on the control signal at an input of the oscillator; a phase detector and loop filter configured to output a low frequency compensation signal in dependence on the output of the oscillator and a reference signal; a correlator configured to frequency correlate an interferer signal and the low frequency compensation signal, and in dependence on that correlation generate a correlation signal; and an adaptive filter configured to adapt the interferer signal in dependence on the correlation signal to output a high frequency compensation signal; and a summation unit configured to combine the low frequency compensation signal and the high frequency compensation signal to form a control signal to drive the input of the oscillator.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: November 27, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Timothy John Newton, Nicolas Sornin
  • Publication number: 20120268228
    Abstract: A variable inductor structure for varying an inductance responsive to a digital tuning signal, comprising: a first inductor; a second, adjustable, inductor; and a digital control mechanism configured to receive the digital tuning signal and to adjust the effective inductance of the second inductor in response to the digital tuning signal; wherein the second inductor is positioned sufficiently close to the first inductor so as to be capable of altering by mutual inductance the effective inductance of the first inductor in dependence on the digital tuning signal.
    Type: Application
    Filed: February 19, 2010
    Publication date: October 25, 2012
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Johan Lucas Gertenbach, Timothy John Newton, Nicolas Sornin, Oliver George Hylton Madge, Michael John Story
  • Patent number: 8278984
    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: Grant
    Filed: March 5, 2009
    Date of Patent: October 2, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Patent number: 8274325
    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: Grant
    Filed: March 5, 2009
    Date of Patent: September 25, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Patent number: 8183900
    Abstract: A charge pump circuit causes a current to flow either into or out of another circuit in dependence on a current output by first and second current paths, each including a current source and a current control device having two switched nodes, and a control node arranged to control a current flow between the first and second switched nodes. The charge pump further includes a capacitive element and a switching arrangement arranged such that, during a first time period, the capacitive element is in communication with a respective one of the current paths, whereby a current output by the first current path causes an electrical charge to be formed on a first capacitive plate and a current output by the second current path causes an electrical charge to be formed on a second capacitive plate, and during a second time period, the electrical charge formed on the first and second capacitive plates during the first time period is discharged to form a current at an output node.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: May 22, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20120105120
    Abstract: A phase-locked loop circuit comprising: an oscillator (20) configured to generate an output signal; an input (25) for receiving a reference clock signal; a delay cell (26) configured to delay the reference clock signal to generate a delayed reference clock signal; a phase comparator (27) configured to generate a quantised signal indicative of the phase difference between the output signal and the delayed reference clock signal, an integrator (28) configured to integrate the quantised signal to form an integrated signal; a first feedback path (22) configured to control the phase and/or frequency of the oscillator in dependence on the integrated signal; and a second feedback path (23) configured to adjust the delay applied by the delay cell (26) in dependence on the integrated signal.
    Type: Application
    Filed: April 7, 2010
    Publication date: May 3, 2012
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventor: Nicolas Sornin
  • Patent number: 8169352
    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: Grant
    Filed: August 7, 2008
    Date of Patent: May 1, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Nicolas Sornin, Davide Orifamma
  • Publication number: 20120098578
    Abstract: A phase-locked loop comprising; an oscillator configured to output an oscillating signal in dependence on the control signal at an input of the oscillator; a phase detector and loop filter configured to output a low frequency compensation signal in dependence on the output of the oscillator and a reference signal; a correlator configured to frequency correlate an interferer signal and the low frequency compensation signal, and in dependence on that correlation generate a correlation signal; and an adaptive filter configured to adapt the interferer signal in dependence on the correlation signal to output a high frequency compensation signal; and a summation unit configured to combine the low frequency compensation signal and the high frequency compensation signal to form a control signal to drive the input of the oscillator.
    Type: Application
    Filed: January 11, 2010
    Publication date: April 26, 2012
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Timothy John Newton, Nicolas Sornin
  • Publication number: 20120075028
    Abstract: An oscillator including a capacitive element and an inductive element for generating an output signal having a predetermined frequency, the capacitive element comprising two or more capacitive arrays, each array having one or more capacitors that are switchably connectable in parallel with the inductive element so as to control the frequency of the output signal, and at least one of those arrays being connected to only part of the inductive element such that, when a capacitor in said one array is connected to that part, the resulting change in the frequency of the output signal is smaller than it would have been if the capacitor had been connected to the whole of the inductive element.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 29, 2012
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventor: Nicolas Sornin
  • Publication number: 20120074990
    Abstract: A signal generator for generating an output signal with a frequency that is a multiple of a frequency of a reference signal, the signal generator including an oscillator configured to generate the output signal in dependence on the reference signal and a control signal and a control circuit configured to generate the control signal to comprise a series of pulses in which one or more of the pulses is offset in phase relative to the reference signal, the control circuit thereby being capable of controlling the frequency and/or phase of the output signal.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 29, 2012
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventor: Nicolas Sornin
  • Patent number: 8131245
    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: Grant
    Filed: September 13, 2007
    Date of Patent: March 6, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Niels Christoffers, Nicolas Sornin
  • Patent number: 8089307
    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: Grant
    Filed: March 4, 2009
    Date of Patent: January 3, 2012
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Pasquale Lamanna, Nicolas Sornin
  • Publication number: 20110299580
    Abstract: A filter for filtering a received signal to attenuate an interferer therein, the interferer having a component at an interferer frequency, and the filter comprising: an intermediate filter providing a passband and a stopband; a first frequency converter configured to form a first intermediate signal by frequency-shifting an input signal derived from the received signal such that a component of the input signal at the interferer frequency is shifted to a frequency in the passband of the intermediate filter, and to input the first intermediate signal to the intermediate filter so as to cause the first intermediate signal to be filtered by the intermediate filter to form a second intermediate signal; a second frequency converter configured to form a cancellation signal by frequency-shifting the second intermediate signal such that a component of the second intermediate signal in the passband of the intermediate filter is shifted to the interferer frequency; and a cancellation unit configured to cancel the cancel
    Type: Application
    Filed: April 7, 2009
    Publication date: December 8, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventor: Nicolas Sornin
  • Publication number: 20110286495
    Abstract: A signal receiver having a gain control circuit comprising: detection means configured to form a representation of the excess amplitude during a training period of a signal received by the receiver; a first gain stimulus generator configured to generate a first gain stimulus in dependence on the excess amplitude detected by the detection means during the training period; averaging means configured to estimate the average of the signal received by the receiver during the training period; a second gain stimulus generator configured to generate a second gain stimulus in dependence on the average estimated by the averaging means during the training period; and a gain control signal generator configured to generate a gain control signal for the receiver in dependence on the first gain stimulus and the second gain stimulus.
    Type: Application
    Filed: August 27, 2009
    Publication date: November 24, 2011
    Applicant: CAMBRIDGE SILICON RADIO LIMITED
    Inventors: Olivier Bernard Andre Seller, Nicolas Sornin, Damien Richard Smith