Patents by Inventor James Digby Yarlet Collier
James Digby Yarlet Collier 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).
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Patent number: 8860618Abstract: An antenna for receiving and/or transmitting radio frequency signals in a predetermined frequency band, the antenna comprising: a first antenna portion comprising at least one conducting loop about a first material having an initial permeability of at least 4; and a second antenna portion embedded within a second material having a dielectric constant of at least 4; wherein the first and second antenna portions are electrically coupled together so as to form a compound antenna having a size such that the diameter of the smallest sphere which encloses all of the first and second antenna portions of the compound antenna is less than 1/30 of the wavelength of the radio frequency signals at the center of the predetermined frequency band.Type: GrantFiled: January 11, 2010Date of Patent: October 14, 2014Assignee: Cambridge Silicon Radio LimitedInventors: Johan Lucas Gertenbach, James Digby Yarlet Collier
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Patent number: 8774857Abstract: Receiving a Wi-Fi radio signal using a Bluetooth receiver architecture. Also, adapting a Wi-Fi receiver architecture to constrain a received radio signal to less than the bandwidth of a conveyed Wi-Fi signal for subsequent processing purposes.Type: GrantFiled: May 20, 2010Date of Patent: July 8, 2014Assignee: Cambridge Silicon Radio LimitedInventors: James Digby Yarlet Collier, Andrei Popescu, David Chappaz
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Patent number: 8537950Abstract: Apparatus for controlling the generation of a DC signal at the output of a mixer, so that the DC signal is predictable, enabling a static offset compensation voltage to offset the DC signal. The apparatus comprises a mixer configured to receive a first and a second input signal, the mixer being such as to generate a first DC signal at the output of the mixer when the first and second input signals have the same frequency and a first relative phase, a phase detector for determining the relative phase of the first and second signals, and a phase modifier configured to modify the phase of the second signal relative to the first signal in dependence on the determination of the relative phase between the first and second signals such that the resulting DC signal at the output of the mixer is the first DC signal.Type: GrantFiled: August 6, 2010Date of Patent: September 17, 2013Assignee: Cambridge Silicon Radio LimitedInventors: Kwangseok Han, Marco Bruno, Stuart Aitken, Steve Jones, Simon Chang, James Digby Yarlet Collier
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Patent number: 8295872Abstract: Improved power control methods and power control systems are described wherein received RSSI values are processed to generate a power control signal which may be used by a link manager, or other element in a receiving station, to determine whether to send a power control message to the transmitting station. The method used to process the received RSSI values is dependent upon a value of the power measurement, for example, the method may involve a comparison between the value of the power measurement and a value of the power control signal. In another embodiment, the received RSSI values may be converted to power values and then smoothed using a filter.Type: GrantFiled: October 22, 2009Date of Patent: October 23, 2012Assignee: Cambridge Silicon Radio Ltd.Inventors: Paul Wright, James Digby Yarlet Collier, Andrei Barbu Popescu
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Patent number: 8199855Abstract: A communication device for receiving a signal in the form of a series of bursts, each burst being at one of a plurality of different available transmission modes, the communication device comprising: two antennas; a receiver unit coupled to the antennas for preferentially receiving signals from a selected one of the antennas; and an antenna selection unit for selecting for each received burst with which of the antennas the receiver unit is to preferentially receive signals.Type: GrantFiled: September 4, 2006Date of Patent: June 12, 2012Assignee: Cambridge Silicon Radio LimitedInventors: James Digby Yarlet Collier, Steven Mark Singer
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Publication number: 20120127047Abstract: An antenna for receiving and/or transmitting radio frequency signals in a predetermined frequency band, the antenna comprising: a first antenna portion comprising at least one conducting loop about a first material having an initial permeability of at least 4; and a second antenna portion embedded within a second material having a dielectric constant of at least 4; wherein the first and second antenna portions are electrically coupled together so as to form a compound antenna having a size such that the diameter of the smallest sphere which encloses all of the first and second antenna portions of the compound antenna is less than 1/30 of the wavelength of the radio frequency signals at the centre of the predetermined frequency band.Type: ApplicationFiled: January 11, 2010Publication date: May 24, 2012Applicant: CAMBRIDGE SILICON RADIO LIMITEDInventors: Johan Lucas Gertenbach, James Digby Yarlet Collier
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Patent number: 8073997Abstract: Method and peripheral device to facilitate the installation of software on a host device to allow communication between that host device and a peripheral device. On connection to a host device a peripheral device presents in a first mode. In the first mode the device identifies itself as a Human Interaction Device and transmits information to the host device to facilitate the installation of the software. Subsequently the peripheral device operates in a second mode in which it identifies itself according to its real function.Type: GrantFiled: March 18, 2009Date of Patent: December 6, 2011Assignee: Cambridge Silicon Radio LimitedInventors: Chris Lowe, James Digby Yarlet Collier, Noel Andrew Bainbridge
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Patent number: 8041320Abstract: A radio receiver for receiving first signals of a first frequency spectrum having principal energy in a first frequency band and second signals of a second frequency spectrum having principal energy in second and third frequency bands, located on either side of the first frequency band, includes (i) an input for receiving an incoming signal; (ii) frequency shifting means for frequency shifting the incoming signal to form an intermediate frequency signal; and (iii) a filter for filtering the intermediate frequency signal. The filter has a frequency response that has a first passband and a second passband separated by a central stopband. A control unit for controlling the frequency shifting means has first and second modes for reception of the first and second signals.Type: GrantFiled: February 25, 2009Date of Patent: October 18, 2011Assignee: Cambridge Silicon Radio LimitedInventor: James Digby Yarlet Collier
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Publication number: 20110188555Abstract: Apparatus for controlling the generation of a DC signal at the output of a mixer, so that the DC signal is predictable, enabling a static offset compensation voltage to offset the DC signal. The apparatus comprises a mixer configured to receive a first and a second input signal, the mixer being such as to generate a first DC signal at the output of the mixer when the first and second input signal have the same frequency and a first relative phase, a phase detector for determining the relative phase of the first and second signals, and a phase modifier configured to modify the phase of the second signal relative to the first signal in dependence on the determination of the relative phase between the first and second signals such that the resulting DC signal at the output of the mixer is the first DC signal.Type: ApplicationFiled: August 6, 2010Publication date: August 4, 2011Applicant: CAMBRIDGE SILICON RADIO LIMITEDInventors: Kwangseok Han, Marco Bruno, Stuart Aitken, Steve Jones, Simon Chang, James Digby Yarlet Collier
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Publication number: 20110065382Abstract: Receiving a Wi-Fi radio signal using a Bluetooth receiver architecture. Also, adapting a Wi-Fi receiver architecture to constrain a received radio signal to less than the bandwidth of a conveyed Wi-Fi signal for subsequent processing purposes.Type: ApplicationFiled: May 20, 2010Publication date: March 17, 2011Applicant: CAMBRIDGE SILICON RADIO LIMITEDInventors: James Digby Yarlet Collier, Andrei Popescu, David Chappaz
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Publication number: 20100311334Abstract: A signal receiver having: an input for receiving radio signals; a clock; a receiving section for processing signals received at the input, the receiving section being configured to operate in: (a) a first mode for processing the received signals in accordance with a first protocol and in dependence on the state of the clock, and (b) a second mode for processing the received signal in accordance with a second protocol by steps including storing a sample of data received in accordance with the second protocol together with a representation of the state of the clock when that data was received, and subsequently comparing a timing indicated by the content of the stored sample of data with the timing indicated by the stored state of the clock.Type: ApplicationFiled: January 2, 2009Publication date: December 9, 2010Applicant: CAMBRIDGE SILICON RADIO LIMITEDInventor: James Digby Yarlet Collier
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Publication number: 20100174834Abstract: Method and peripheral device to facilitate the installation of software on a host device to allow communication between that host device and a peripheral device. On connection to a host device a peripheral device presents in a first mode. In the first mode the device identifies itself as a Human Interaction Device and transmits information to the host device to facilitate the installation of the software. Subsequently the peripheral device operates in a second mode in which it identifies itself according to its real function.Type: ApplicationFiled: March 18, 2009Publication date: July 8, 2010Applicant: CAMBRIDGE SILICON RADIO LIMITEDInventors: Chris Lowe, James Digby Yarlet Collier, Noel Andrew Bainbridge
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Publication number: 20100105421Abstract: Improved power control methods and power control systems are described wherein received RSSI values are processed to generate a power control signal which may be used by a link manager, or other element in a receiving station, to determine whether to send a power control message to the transmitting station. The method used to process the received RSSI values is dependent upon a value of the power measurement, for example, the method may involve a comparison between the value of the power measurement and a value of the power control signal. In another embodiment, the received RSSI values may be converted to power values and then smoothed using a filter.Type: ApplicationFiled: October 22, 2009Publication date: April 29, 2010Applicant: Cambridge Silicon Radio Ltd.Inventors: Paul Wright, James Digby Yarlet Collier, Andrei Barbu Popescu
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Patent number: 7668986Abstract: A peripheral device having: an interface for connection to a host device; a memory for storing software for use by the host device for operating with the peripheral device; and a processor for controlling the operation of the device such that the device has two operating modes over the interface: a first mode in which it operates as a storage device storing the said software and a second mode in which it operates as a device for providing other functionality to a device connected to it via the interface by means of the software; the peripheral device being configured so that on connection of the interface to a host device it operates in the first mode and so that it subsequently operates in the second mode.Type: GrantFiled: February 13, 2006Date of Patent: February 23, 2010Assignee: Cambridge Silicon Radio LimitedInventors: Chris Lowe, James Digby Yarlet Collier
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Publication number: 20100009648Abstract: A radio receiver for receiving first signals of a first frequency spectrum having principal energy in a first frequency band and second signals of a second frequency spectrum having principal energy in second and third frequency bands, located on either side of the first frequency band, includes (i) an input for receiving an incoming signal; (ii) frequency shifting means for frequency shifting the incoming signal to form an intermediate frequency signal; and (iii) a filter for filtering the intermediate frequency signal. The filter has a frequency response that has a first passband and a second passband separated by a central stopband. A control unit for controlling the frequency shifting means has first and second modes for reception of the first and second signals.Type: ApplicationFiled: February 25, 2009Publication date: January 14, 2010Inventor: James Digby Yarlet Collier
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Publication number: 20090098869Abstract: A method of reducing the power consumption of a multi-mode mobile telecommunications device, the method comprising receiving information relating to the location of the mobile telecommunications device and adjusting the frequency with which the mobile telecommunications device searches for a wireless access point according to the information so received.Type: ApplicationFiled: August 19, 2008Publication date: April 16, 2009Applicant: UBINETICS (VPT) LIMITEDInventors: Jeffery Torrance, James Digby Yarlet Collier
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Patent number: 7516169Abstract: A method for generating random data, the method comprising repeatedly performing a series of operations, and the series of operations comprising processing a seed value to generate a resulting value for use as the seed value in a subsequent performance of the series of operations and to generate output random data; wherein the series of operations also comprises: determining whether a predetermined amount of new truly random data is available; and if such data is available, modifying the generation of at least the resulting value in dependence on the new truly random data.Type: GrantFiled: January 31, 2002Date of Patent: April 7, 2009Assignee: Cambridge Silicon Radio LimitedInventor: James Digby Yarlet Collier
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Publication number: 20090010311Abstract: A communication device for receiving a signal in the form of a series of bursts, each burst being at one of a plurality of different available transmission modes, the communication device comprising: two antennas; a receiver unit coupled to the antennas for preferentially receiving signals from a selected one of the antennas; and an antenna selection unit for selecting for each received burst with which of the antennas the receiver unit is to preferentially receive signals.Type: ApplicationFiled: September 4, 2006Publication date: January 8, 2009Applicant: CAMBRIDGE SILICON RADIO LIMITEDInventors: James Digby Yarlet Collier, Steven Mark Singer
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Publication number: 20080195768Abstract: A peripheral device having: an interface for connection to a host device; a memory for storing software for use by the host device for operating with the peripheral device; and a processor for controlling the operation of the device such that the device has two operating modes over the interface: a first mode in which it operates as a storage device storing the said software and a second mode in which it operates as a device for providing other functionality to a device connected to it via the interface by means of the software; the peripheral device being configured so that on connection of the interface to a host device it operates in the first mode and so that it subsequently operates in the second mode.Type: ApplicationFiled: February 13, 2006Publication date: August 14, 2008Applicant: CAMBRIDGE SILICON RADIO LIMITEDInventors: Chris Lowe, James Digby Yarlet Collier
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Patent number: 6968168Abstract: A variable frequency oscillator comprising: an oscillatory circuit for generating a periodic output dependent on the capacitance between a first node and a second node of the circuit, and having a capacitative element connected between the first node and the second node; the capacitative element comprising: a variable capacitance unit, the capacitance of which is variable for varying the frequency of the output and a plurality of finite capacitances each being selectively connectable in parallel with the variable capacitance unit between the first node and the second node to trim the frequency of the output.Type: GrantFiled: July 18, 2000Date of Patent: November 22, 2005Assignee: Cambridge Silicon Radio Ltd.Inventors: James Digby Yarlet Collier, Ian Michael Sabberton