Patents by Inventor Somsack Sychaleun
Somsack Sychaleun 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: 8411763Abstract: The present invention provides combining and separation circuitry, which allows multiple signals in different frequency bands to travel in either direction over a single cable and be combined and separated as desired. In one embodiment, the combining and separation circuitry includes first, second, third, and fourth ports. The first port is configured to send or receive signals in a first frequency band, the second port is configured to send or receive signals in a second frequency band, and the third port is configured to send or receive DC signals, baseband signals, or a combination thereof. The fourth port is configured to be coupled to a cable in which the signals in the first and second frequency bands, as well as the DC and/or baseband signals, can be sent in either direction.Type: GrantFiled: February 20, 2012Date of Patent: April 2, 2013Assignee: Apple Inc.Inventors: Somsack Sychaleun, Steve Beaudin, Chun-Yun Jian
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Publication number: 20120235877Abstract: Distributed band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequency band or series resonators adapted to anti-resonate substantially at respective anti-resonance frequencies defining the rejection frequency band. These resonators are connected through a phase shifter which imparts an impedance phase shift of approximately 45° to 135°. Exemplary applications of the band reject filters disclosed herein include implementation as an inter-stage band reject filter for a base station power amplifier for a wireless communication system, as a radio frequency band reject filter in a duplexer for a wireless communication terminal, and in a low noise amplifier input stage.Type: ApplicationFiled: June 4, 2012Publication date: September 20, 2012Inventors: STEVE BEAUDIN, CHUN-YUN JIAN, SOMSACK SYCHALEUN
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Patent number: 8207799Abstract: Distributed band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequency band or series resonators adapted to anti-resonate substantially at respective anti-resonance frequencies defining the rejection frequency band. These resonators are connected through a phase shifter which imparts an impedance phase shift of approximately 45° to 135°. Exemplary applications of the band reject filters disclosed herein include implementation as an inter-stage band reject filter for a base station power amplifier for a wireless communication system, as a radio frequency band reject filter in a duplexer for a wireless communication terminal, and in a low noise amplifier input stage.Type: GrantFiled: June 23, 2011Date of Patent: June 26, 2012Assignee: Rockstar Bidco, LPInventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun
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Publication number: 20120147978Abstract: The present invention provides combining and separation circuitry, which allows multiple signals in different frequency bands to travel in either direction over a single cable and be combined and separated as desired. In one embodiment, the combining and separation circuitry includes first, second, third, and fourth ports. The first port is configured to send or receive signals in a first frequency band, the second port is configured to send or receive signals in a second frequency band, and the third port is configured to send or receive DC signals, baseband signals, or a combination thereof. The fourth port is configured to be coupled to a cable in which the signals in the first and second frequency bands, as well as the DC and/or baseband signals, can be sent in either direction.Type: ApplicationFiled: February 20, 2012Publication date: June 14, 2012Applicant: Rockstar Bidco, LPInventors: Somsack Sychaleun, Steve Beaudin, Chun-Yun Jian
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Patent number: 8135086Abstract: The present invention provides combining and separation circuitry, which allows multiple signals in different frequency bands to travel in either direction over a single cable and be combined and separated as desired. In one embodiment, the combining and separation circuitry includes first, second, third, and fourth ports. The first port is configured to send or receive signals in a first frequency band, the second port is configured to send or receive signals in a second frequency band, and the third port is configured to send or receive DC signals, baseband signals, or a combination thereof. The fourth port is configured to be coupled to a cable in which the signals in the first and second frequency bands, as well as the DC and/or baseband signals, can be sent in either direction.Type: GrantFiled: August 9, 2004Date of Patent: March 13, 2012Assignee: Rockstar Bidco, LPInventors: Somsack Sychaleun, Steve Beaudin, Chun-Yun Jian
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Publication number: 20110248795Abstract: Distributed band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequency band or series resonators adapted to anti-resonate substantially at respective anti-resonance frequencies defining the rejection frequency band. These resonators are connected through a phase shifter which imparts an impedance phase shift of approximately 45° to 135°. Exemplary applications of the band reject filters disclosed herein include implementation as an inter-stage band reject filter for a base station power amplifier for a wireless communication system, as a radio frequency band reject filter in a duplexer for a wireless communication terminal, and in a low noise amplifier input stage.Type: ApplicationFiled: June 23, 2011Publication date: October 13, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: STEVE BEAUDIN, CHUN-YUN JIAN, SOMSACK SYCHALEUN
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Patent number: 8004371Abstract: Distributed band reject filters are disclosed. A first radio frequency band reject filter is disclosed having a splitter having a first input port, a first output port and a second output port, the splitter being operable on an input signal applied to the first input port to provide a respective output signal proportional to the input signal at each of the first and second output ports, the output signals having a phase shift between 45 degrees and 135 degree with respect to the input signal, as well as first, second and third acoustic resonators coupled respectively to the first input port, the first output port and the second output port.Type: GrantFiled: August 16, 2010Date of Patent: August 23, 2011Assignee: Nortel Networks LimitedInventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun
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Publication number: 20100308911Abstract: Distributed band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequency band or series resonators adapted to anti-resonate substantially at respective anti-resonance frequencies defining the rejection frequency band. These resonators are connected through a phase shifter which imparts an impedance phase shift of approximately 45° to 135°. Exemplary applications of the band reject filters disclosed herein include implementation as an inter-stage band reject filter for a base station power amplifier for a wireless communication system, as a radio frequency band reject filter in a duplexer for a wireless communication terminal, and in a low noise amplifier input stage.Type: ApplicationFiled: August 16, 2010Publication date: December 9, 2010Applicant: NORTEL NETWORKS LIMITEDInventors: STEVE BEAUDIN, CHUN-YUN JIAN, SOMSACK SYCHALEUN
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Patent number: 7777597Abstract: Band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequency band or series resonators adapted to anti-resonate substantially at respective anti-resonance frequencies defining the rejection frequency band. These resonators are connected through a phase shifter which imparts an impedance phase shift of approximately 45° to 135°. Exemplary applications of the band reject filters disclosed herein include implementation as an inter-stage band reject filter for a base station power amplifier for a wireless communication system, as a radio frequency band reject filter in a duplexer for a wireless communication terminal, and in a low noise amplifier input stage.Type: GrantFiled: September 30, 2005Date of Patent: August 17, 2010Assignee: Nortel Networks LimitedInventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun
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Publication number: 20080129411Abstract: Band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequency band or series resonators adapted to anti-resonate substantially at respective anti-resonance frequencies defining the rejection frequency band. These resonators are connected through a phase shifter which imparts an impedance phase shift of approximately 45° to 135°. Exemplary applications of the band reject filters disclosed herein include implementation as an inter-stage band reject filter for a base station power amplifier for a wireless communication system, as a radio frequency band reject filter in a duplexer for a wireless communication terminal, and in a low noise amplifier input stage.Type: ApplicationFiled: September 30, 2005Publication date: June 5, 2008Inventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun
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Publication number: 20070135169Abstract: The present invention facilitates the reduction of cabling required in a base station environment. When receive diversity is employed, main and diversity antennas are used to receive common signals at different locations. The signals received at the main and diversity antennas are combined with one another in the masthead and transmitted over a single feeder cable to a base housing for further processing. Thus, signals that were normally sent over separate feeder cables and combined in the base housing are combined in the masthead and sent over a single feeder cable. The technique can be replicated for each sector provided by the base station environment.Type: ApplicationFiled: December 12, 2005Publication date: June 14, 2007Applicant: NORTEL NETWORKS LIMITEDInventors: Somsack Sychaleun, Gregory Carleton, Steve Beaudin
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Patent number: 7205956Abstract: A communications tower, or other structure is provided with at least one waveguide defined in a structural support. The waveguide can be used to transmit signals up and down the communications tower thereby eliminating at least some cabling.Type: GrantFiled: December 14, 2004Date of Patent: April 17, 2007Assignee: Nortel Networks LimitedInventors: Somsack Sychaleun, Gregory Carleton, Steve Beaudin
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Patent number: 7023300Abstract: Very low passband ripple is provided in a wide bandwidth high frequency SAW FIR filter using slanted finger IDTs by one or more of three techniques: cancelling regenerated SAWs at parallel-connected input IDTs of two SAW filters which are similar except for a quarter-wavelength difference in spacing of the input and output IDTs, this difference varying with wavelength across the IDT aperture; shaping edges of shield electrodes to provide quarter-wavelength differences in, and hence cancellation of, SAWs reflected at the edges, the differences varying with wavelength across the IDT aperture; and making pairs of slanted shield electrodes symmetrical to compensate for refraction of SAWS by the shield electrodes.Type: GrantFiled: December 15, 2004Date of Patent: April 4, 2006Inventors: Chun-Yun Jian, Steve A. Beaudin, Somsack Sychaleun
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Patent number: 6924715Abstract: Acoustic resonators such as surface acoustic wave (SAW) devices and thin film bulk acoustic resonators (FBAR) can be configured to produce a band reject filter. Such a filter overcomes the insertion loss and power handling limitations of conventional band pass configurations and as such can be used in power amplifier and duplexer applications.Type: GrantFiled: September 16, 2003Date of Patent: August 2, 2005Assignee: Nortel Networks LimitedInventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun, Yuxing Zhang
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Publication number: 20050093650Abstract: Very low passband ripple is provided in a wide bandwidth high frequency SAW FIR filter using slanted finger IDTs by one or more of three techniques: cancelling regenerated SAWs at parallel-connected input IDTs of two SAW filters which are similar except for a quarter-wavelength difference in spacing of the input and output IDTs, this difference varying with wavelength across the IDT aperture; shaping edges of shield electrodes to provide quarter-wavelength differences in, and hence cancellation of, SAWs reflected at the edges, the differences varying with wavelength across the IDT aperture; and making pairs of slanted shield electrodes symmetrical to compensate for refraction of SAWS by the shield electrodes.Type: ApplicationFiled: December 15, 2004Publication date: May 5, 2005Inventors: Chun-Yun Jian, Steve Beaudin, Somsack Sychaleun
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Patent number: 6856214Abstract: Very low passband ripple is provided in a wide bandwidth high frequency SAW FIR filter using slanted finger IDTs by one or more of three techniques: cancelling regenerated SAWs at parallel-connected input IDTs of two SAW filters which are similar except for a quarter-wavelength difference in spacing of the input and output IDTs, this difference varying with wavelength across the IDT aperture; shaping edges of shield electrodes to provide quarter-wavelength differences in, and hence cancellation of, SAWs reflected at the edges, the differences varying with wavelength across the IDT aperture; and making pairs of slanted shield electrodes symmetrical to compensate for refraction of SAWs by the shield electrodes.Type: GrantFiled: December 10, 2002Date of Patent: February 15, 2005Assignee: Nortel Networks LimitedInventors: Chun-Yun Jian, Steve A. Beaudin, Somsack Sychaleun
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Publication number: 20040130411Abstract: Acoustic resonators such as surface acoustic wave (SAW) devices and thin film bulk acoustic resonators (FBAR) can be configured to produce a band reject filter. Such a filter overcomes the insertion loss and power handling limitations of conventional band pass configurations and as such can be used in power amplifier and duplexer applications.Type: ApplicationFiled: September 16, 2003Publication date: July 8, 2004Inventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun, Yuxing Zhang
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Publication number: 20040108917Abstract: Very low passband ripple is provided in a wide bandwidth high frequency SAW FIR filter using slanted finger IDTs by one or more of three techniques: cancelling regenerated SAWs at parallel-connected input IDTs of two SAW filters which are similar except for a quarter-wavelength difference in spacing of the input and output IDTs, this difference varying with wavelength across the IDT aperture; shaping edges of shield electrodes to provide quarter-wavelength differences in, and hence cancellation of, SAWs reflected at the edges, the differences varying with wavelength across the IDT aperture; and making pairs of slanted shield electrodes symmetrical to compensate for refraction of SAWs by the shield electrodes.Type: ApplicationFiled: December 10, 2002Publication date: June 10, 2004Inventors: Chun-Yun Jian, Steve A. Beaudin, Somsack Sychaleun
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Patent number: 6710677Abstract: Acoustic resonators such as surface acoustic wave (SAW) devices and thin film bulk acoustic resonators (FBAR) can be configured to produce a band reject filter. Such a filter overcomes the insertion loss and power handling limitations of conventional band pass configurations and as such can be used in power amplifier and duplexer applications.Type: GrantFiled: February 12, 2002Date of Patent: March 23, 2004Assignee: Nortel Networks LimitedInventors: Steve A Beaudin, Somsack Sychaleun, Chun-Yun Jian
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Patent number: 6710650Abstract: A low noise amplifier (LNA) in a LNA arrangement is selectively bypassed, without detracting from the performance of the LNA arrangement when it is not bypassed, by selecting components of an input signal which are reflected at the input of the LNA. These reflected signal components can be increased, when the LNA is bypassed, by interrupting a supply voltage to the LNA and/or shunting the input of the LNA to ground. The arrangement can be a balanced LNA arrangement, using two LNAs and two quadrature couplers, or it can be an unbalanced LNA arrangement.Type: GrantFiled: September 30, 2002Date of Patent: March 23, 2004Assignee: Nortel Networks LimitedInventors: Steve A. Beaudin, Somsack Sychaleun, Mark N. Willetts