Patents by Inventor Tomokazu Komazaki
Tomokazu Komazaki 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: 7893794Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: GrantFiled: October 30, 2007Date of Patent: February 22, 2011Assignee: Oki Semiconductor Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Patent number: 7859362Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: GrantFiled: October 30, 2007Date of Patent: December 28, 2010Assignee: Oki Semiconductor Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Patent number: 7679472Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: GrantFiled: October 30, 2007Date of Patent: March 16, 2010Assignee: Oki Semiconductor Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Publication number: 20100007434Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: ApplicationFiled: October 30, 2007Publication date: January 14, 2010Applicant: Oki Electronic Industry Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Patent number: 7602263Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: GrantFiled: October 30, 2007Date of Patent: October 13, 2009Assignee: Oki Semiconductor Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Patent number: 7479845Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: GrantFiled: January 11, 2005Date of Patent: January 20, 2009Assignee: Oki Electric Industry Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Publication number: 20080290964Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: ApplicationFiled: October 30, 2007Publication date: November 27, 2008Applicant: Oki Electronic Industry Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Patent number: 7420440Abstract: A surface acoustic wave filter includes an antenna terminal, a transmitting filter and a variable branching line both of which are coupled to the antenna terminal and a receiving filter coupled to the variable branching line. The transmitting filter has a first end series-arm SAW resonator, a second end series-arm SAW resonator, a middle series-arm SAW resonator coupled between the first and second end series-arm SAW resonators and parallel-arm SAW resonators. Each of the first and second end series-arm SAW resonator has a first resonance frequency. The middle series-arm SAW resonator has a second resonance frequency that is higher than the first resonance frequency.Type: GrantFiled: November 9, 2004Date of Patent: September 2, 2008Assignee: Oki Electric Industry Co., Ltd.Inventors: Kenichi Anasako, Yoshiaki Fujita, Hisanori Ehara, Tomokazu Komazaki
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Publication number: 20080136556Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: ApplicationFiled: October 30, 2007Publication date: June 12, 2008Applicant: Oki Electronic Industry Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Publication number: 20080129413Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: ApplicationFiled: October 30, 2007Publication date: June 5, 2008Applicant: Oki Electronic Industry Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Patent number: 7242271Abstract: A SAW filter circuit has: a first circuit having first to fourth connecting points, a first SAW resonator electrically connected to the first and second connecting points, second SAW resonator electrically connected to the first and third connecting points, and third SAW resonator electrically connected to the second and fourth connecting points; and a second circuit made of a fifth connecting point electrically connected to the third connecting point, a sixth connecting point electrically connected to the fourth connecting point, seventh and eighth connecting points being electrically short-circuited, a first passive element electrically connected to the fifth and sixth connecting points, a second passive element electrically connected to the fifth and seventh connecting points, and a third passive element electrically connected to the sixth and eighth connecting points. Each passive elements is an inductor or capacitor, and at least one of the first to third passive elements is a capacitor.Type: GrantFiled: February 28, 2005Date of Patent: July 10, 2007Assignee: Oki Electric Industry Co., Ltd.Inventor: Tomokazu Komazaki
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Patent number: 7034392Abstract: A filter chip lying on an upper surface of a top layer package substrate is connected to an upper surface ground electrode (235). The upper ground electrode (235) and a lower surface ground electrode (237) are connected to each other via through electrodes (261, 262, 263), ground wiring patterns (251, 252), first connecting lines (271 to 276), and second connecting lines (281, 282). The first connecting lines (271 to 276) are connected to the ground wiring patterns (251, 252), whereas the second connecting lines (281, 282) are not connected to the ground wiring patterns (251, 252), respectively. Owing to the provision of the connecting lines connected to the ground wiring patterns (251, 252) and the connecting lines unconnected to the ground wiring patterns (251, 252), the impedance between a multilayer package substrate and ground can be adjusted.Type: GrantFiled: July 8, 2004Date of Patent: April 25, 2006Assignee: Oki Electric Industry Co., Ltd.Inventors: Akio Hirakawa, Yoshiaki Fujita, Tomokazu Komazaki
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Patent number: 6960966Abstract: A high-performance SAW filter is to be provided which has lower insertion loss in a pass band and high attenuation in an attenuation band on the low frequency side of the pass band. In a SAW filter with attenuation poles configured of a two-port circuit for filtering for forming a ladder type SAW filter using a SAW resonator and a two-port circuit for impedance formed of an impedance serially connected, the impedance of the two-port circuit for impedance is configured so as to form an attenuation band of a predetermined width having a sufficient attenuation characteristic on the low frequency side of a pass band.Type: GrantFiled: September 24, 2003Date of Patent: November 1, 2005Assignee: Oki Electric Industry Co., Ltd.Inventors: Kazushige Noguchi, Satoshi Terada, Wataru Ohashi, Tomokazu Komazaki
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Publication number: 20050190015Abstract: A SAW filter circuit has: a first circuit having first to fourth connecting points, a first SAW resonator electrically connected to the first and second connecting points, second SAW resonator electrically connected to the first and third connecting points, and third SAW resonator electrically connected to the second and fourth connecting points; and a second circuit made of a fifth connecting point electrically connected to the third connecting point, a sixth connecting point electrically connected to the fourth connecting point, seventh and eighth connecting points being electrically short-circuited, a first passive element electrically connected to the fifth and sixth connecting points, a second passive element electrically connected to the fifth and seventh connecting points, and a third passive element electrically connected to the sixth and eighth connecting points. Each passive elements is an inductor or capacitor, and at least one of the first to third passive elements is a capacitor.Type: ApplicationFiled: February 28, 2005Publication date: September 1, 2005Applicant: Oki Electric Industry Co., Ltd.Inventor: Tomokazu Komazaki
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Patent number: 6937113Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: GrantFiled: April 3, 2002Date of Patent: August 30, 2005Assignee: Oki Electric Industry Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Patent number: 6911878Abstract: A surface acoustic wave filter includes an antenna terminal, a transmitting filter and a variable branching line both of which are coupled to the antenna terminal and a receiving filter coupled to the variable branching line. The transmitting filter has a first end series-arm SAW resonator, a second end series-arm SAW resonator, a middle series-arm SAW resonator coupled between the first and second end series-arm SAW resonators and parallel-arm SAW resonators. Each of the first and second end series-arm SAW resonator has a first resonance frequency. The middle series-arm SAW resonator has a second resonance frequency that is higher than the first resonance frequency.Type: GrantFiled: October 21, 2002Date of Patent: June 28, 2005Assignee: Oki Electric Industry Co., Ltd.Inventors: Kenichi Anasako, Yoshiaki Fujita, Hisanori Ehara, Tomokazu Komazaki
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Publication number: 20050134407Abstract: A surface acoustic wave filter includes an antenna terminal, a transmitting filter and a variable branching line both of which are coupled to the antenna terminal and a receiving filter coupled to the variable branching line. The transmitting filter has a first end series-arm SAW resonator, a second end series-arm SAW resonator, a middle series-arm SAW resonator coupled between the first and second end series-arm SAW resonators and parallel-arm SAW resonators. Each of the first and second end series-arm SAW resonator has a first resonance frequency. The middle series-arm SAW resonator has a second resonance frequency that is higher than the first resonance frequency.Type: ApplicationFiled: November 9, 2004Publication date: June 23, 2005Inventors: Kenichi Anasako, Yoshiaki Fujita, Hisanori Ehara, Tomokazu Komazaki
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Publication number: 20050122187Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.Type: ApplicationFiled: January 11, 2005Publication date: June 9, 2005Applicant: Oki Electric Industry Co., Ltd.Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
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Publication number: 20050104203Abstract: A filter chip lying on an upper surface of a top layer package substrate is connected to an upper surface ground electrode (235). The upper ground electrode (235) and a lower surface ground electrode (237) are connected to each other via through electrodes (261, 262, 263), ground wiring patterns (251, 252), first connecting lines (271 to 276), and second connecting lines (281, 282). The first connecting lines (271 to 276) are connected to the ground wiring patterns (251, 252), whereas the second connecting lines (281, 282) are not connected to the ground wiring patterns (251, 252), respectively. Owing to the provision of the connecting lines connected to the ground wiring patterns (251, 252) and the connecting lines unconnected to the ground wiring patterns (251, 252), the impedance between a multilayer package substrate and ground can be adjusted.Type: ApplicationFiled: July 8, 2004Publication date: May 19, 2005Applicant: Oki Electric Industry Co., Ltd.Inventors: Akio Hirakawa, Yoshiaki Fujita, Tomokazu Komazaki
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Patent number: RE43958Abstract: A polar SAW (Surface Acoustic Wave) filter includes a band-pass ladder type SAW filter having a SAW resonator. A two-terminal pair circuit is serially connected to the band-pass ladder type SAW filter and includes a plurality of inductors. The polar SAW filter has attenuation poles in each of the higher-frequency and lower-frequency attenuation ranges of a pass band.Type: GrantFiled: January 10, 2006Date of Patent: February 5, 2013Assignee: Intellectual Ventures Fund 77 LLCInventor: Tomokazu Komazaki