Patents by Inventor Kumiko Takikawa
Kumiko Takikawa 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: 9331031Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: GrantFiled: March 23, 2015Date of Patent: May 3, 2016Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Publication number: 20150194394Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: ApplicationFiled: March 23, 2015Publication date: July 9, 2015Inventors: Kumiko TAKIKAWA, Satoshi TANAKA, Yoshiyasu TASHIRO
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Patent number: 9014655Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: GrantFiled: July 30, 2014Date of Patent: April 21, 2015Assignee: Renesas Electronics CorporationInventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Publication number: 20140342683Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: ApplicationFiled: July 30, 2014Publication date: November 20, 2014Inventors: Kumiko TAKIKAWA, Satoshi TANAKA, Yoshiyasu TASHIRO
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Patent number: 8824994Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: GrantFiled: May 30, 2013Date of Patent: September 2, 2014Assignee: Renesas Electronics CorporationInventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Publication number: 20130257544Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: ApplicationFiled: May 30, 2013Publication date: October 3, 2013Inventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Patent number: 8472911Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: GrantFiled: June 4, 2012Date of Patent: June 25, 2013Assignee: Renesas Electronics CorporationInventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Publication number: 20120238233Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: ApplicationFiled: June 4, 2012Publication date: September 20, 2012Applicant: RENESAS ELECTRONICS CORPORATIONInventors: Kumiko TAKIKAWA, Satoshi TANAKA, Yoshiyasu TASHIRO
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Patent number: 8204471Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: GrantFiled: May 5, 2011Date of Patent: June 19, 2012Assignee: Renesas Electronics CorporationInventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Patent number: 8107912Abstract: A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.Type: GrantFiled: December 22, 2010Date of Patent: January 31, 2012Assignees: Renesas Electronics Corporation, Tipcom LimitedInventors: Satoshi Tanaka, Kazuo Watanabe, Masao Hotta, Toyohiko Hongo, Taizo Yamawaki, Masumi Kasahara, Kumiko Takikawa
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Patent number: 8036628Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: GrantFiled: July 20, 2010Date of Patent: October 11, 2011Assignee: Renesas Electronics CorporationInventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Publication number: 20110204527Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: ApplicationFiled: May 5, 2011Publication date: August 25, 2011Applicant: RENESAS ELECTRONICS CORPORATIONInventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Patent number: 7953384Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: GrantFiled: July 20, 2010Date of Patent: May 31, 2011Assignee: Renesas Electronics CorporationInventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Publication number: 20110092175Abstract: A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.Type: ApplicationFiled: December 22, 2010Publication date: April 21, 2011Applicants: RENESAS TECHNOLOGY CORP., TTPCOM LIMITEDInventors: Satoshi Tanaka, Kazuo Watanabe, Masao Hotta, Toyohiko Hongo, Taizo Yamawaki, Masumi Kasahara, Kumiko Takikawa
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Patent number: 7890118Abstract: In a position detection system utilizing a WLAN supporting multiple data transfer rates, it is possible to reduce the number of required installed base stations, so system construction costs can be lowered. In a wireless station, a transmitted signal is judged at the time of transmission, and in case it is normal user data, the signal is transmitted by setting optimal transmission parameters for which a high communication throughput with wireless communication is obtained, and in case it is a position detection signal, the aforementioned signal is transmitted by setting transmission parameters for which the service range is increased. As a transmission parameter for which the service range is increased, a low data transfer rate or a long preamble length is used.Type: GrantFiled: November 8, 2005Date of Patent: February 15, 2011Assignee: Hitachi, Ltd.Inventors: Takaki Uta, Atsushi Ogino, Ryota Yamasaki, Kumiko Takikawa
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Patent number: 7885626Abstract: A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.Type: GrantFiled: March 27, 2008Date of Patent: February 8, 2011Assignees: Renesas Technology Corp., TTPCOM LimitedInventors: Satoshi Tanaka, Kazuo Watanabe, Masao Hotta, Toyohiko Hongo, Taizo Yamawaki, Masumi Kasahara, Kumiko Takikawa
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Publication number: 20100285770Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: ApplicationFiled: July 20, 2010Publication date: November 11, 2010Applicant: RENESAS TECHNOLOGY CORP.Inventors: Kumiko TAKIKAWA, Satoshi TANAKA, Yoshiyasu TASHIRO
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Patent number: 7783276Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.Type: GrantFiled: May 6, 2008Date of Patent: August 24, 2010Assignee: Renesas Technology Corp.Inventors: Kumiko Takikawa, Satoshi Tanaka, Yoshiyasu Tashiro
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Patent number: 7509139Abstract: When one base station to which a terminal is to connect is determined from a plurality of base stations in a wireless communication system, the best base station is selected according to the communication quality or the content of communication services. In the wireless communication system, the plurality of base stations are classified into a plurality of groups. Indexes of communication quality between the base stations and the terminal are obtained and, for each group, the characterizing quantities of the indexes of communication quality are calculated. The base station group with which the terminal is to communicate is specified based on the characterizing quantities. One of the base stations in the specified group is determined as a communication destination base station.Type: GrantFiled: January 11, 2006Date of Patent: March 24, 2009Assignee: Hitachi, Ltd.Inventors: Ryota Yamasaki, Kumiko Takikawa, Atsushi Ogino, Takaki Uta
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Publication number: 20080285195Abstract: An IC having inputs and outputs for a plurality of frequency bands from a high frequency band to a low frequency band is protected from electrostatic damage. A high-frequency section of the IC is provided with a protection circuit including diode-connected transistors connected by multiple stages. In addition, there are applied the transistors in which elements thereof are isolated by insulator that can prevent thyristor operation.Type: ApplicationFiled: July 29, 2008Publication date: November 20, 2008Inventors: Kumiko Takikawa, Satoshi Tanaka