Patents by Inventor Jun-ichiro Hara
Jun-ichiro Hara 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: 7268525Abstract: A buck-boost converter includes: a buck converter section including a first switch, a first rectifier, and an inductor; a boost converter section sharing the inductor and including a second switch, a second rectifier, and a smoothing circuit; and a control circuit for generating and outputting a first driving signal for opening and closing the first switch and a second driving signal for opening and closing the second switch.Type: GrantFiled: September 27, 2006Date of Patent: September 11, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takuya Ishii, Masato Yoshida, Mikio Motomori, Jun-ichiro Hara
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Publication number: 20070075687Abstract: A buck-boost converter includes: a buck converter section including a first switch, a first rectifier, and an inductor; a boost converter section sharing the inductor and including a second switch, a second rectifier, and a smoothing circuit; and a control circuit for generating and outputting a first driving signal for opening and closing the first switch and a second driving signal for opening and closing the second switch.Type: ApplicationFiled: September 27, 2006Publication date: April 5, 2007Inventors: Takuya Ishii, Masato Yoshida, Mikio Motomori, Jun-ichiro Hara
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Patent number: 7049812Abstract: A magnetic field sensor including an amplifier and a magnetic field element for outputting a two-phase signal according to an applied magnetic field strength. Polarities of the two phases of the signal are mutually opposite. The amplifier amplifies the signal and outputs a resulting voltage across a pair of output terminals, which are connected to both ends of a condenser. A switch makes a connection between one of the output terminals and one end of the condenser. The switch closes in a first phase of the two-phase signal and opens in a second phase. A comparator inputting voltage across both ends of the switch converts the result of the comparison, based on a predetermined voltage, into a binary output signal.Type: GrantFiled: April 21, 2004Date of Patent: May 23, 2006Assignee: Matsushita Electric Industrial Co., LtdInventors: Jun-ichiro Hara, Tadata Hatanaka
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Patent number: 6861839Abstract: A magnetic field sensor including an amplifier and a magnetic field element for outputting a signal to a switch circuit according to the strength of an applied magnetic field. The switch circuit outputs a signal selected by an external two-phase signal to an amplifier that amplifies the signal and outputs a resulting voltage to a first end of a memory element. A switch, having one end connected to a second end of the memory element, is controlled by the two-phase signal. The switch closes in a first phase of the two-phase signal causing the memory element to store the output voltage of the amplifier, and opens in a second phase causing a vector sum of the output voltage the amplifier to be stored in the memory element and providing the output voltage to a signal output terminal connected to the second end of the memory element.Type: GrantFiled: April 19, 2004Date of Patent: March 1, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Jun-ichiro Hara, Tadata Hatanaka
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Publication number: 20040196034Abstract: A magnetic field sensor including an amplifier and a magnetic field element for outputting a signal to a switch circuit according to the strength of an applied magnetic field. The switch circuit outputs a signal selected by an external two-phase signal to an amplifier that amplifies the signal and outputs a resulting voltage to a first end of a memory element. A switch, having one end connected to a second end of the memory element, is controlled by the two-phase signal. The switch closes in a first phase of the two-phase signal causing the memory element to store the output voltage of the amplifier, and opens in a second phase causing a vector sum of the output voltage the amplifier to be stored in the memory element and providing the output voltage to a signal output terminal connected to the second end of the memory element.Type: ApplicationFiled: April 21, 2004Publication date: October 7, 2004Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Jun-ichiro Hara, Tadata Hatanaka
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Publication number: 20040196033Abstract: A magnetic field sensor including an amplifier and a magnetic field element for outputting a signal to a switch circuit according to the strength of an applied magnetic field. The switch circuit outputs a signal selected by an external two-phase signal to an amplifier that amplifies the signal and outputs a resulting voltage to a first end of a memory element. A switch, having one end connected to a second end of the memory element, is controlled by the two-phase signal. The switch closes in a first phase of the two-phase signal causing the memory element to store the output voltage of the amplifier, and opens in a second phase causing a vector sum of the output voltage the amplifier to be stored in the memory element and providing the output voltage to a signal output terminal connected to the second end of the memory element.Type: ApplicationFiled: April 19, 2004Publication date: October 7, 2004Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Jun-ichiro Hara, Tadata Hatanaka
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Patent number: 6777932Abstract: A magnetic field sensor including an amplifier and a magnetic field element for outputting a signal to a switch circuit according to the strength of an applied magnetic field. The switch circuit outputs a signal selected by an external two-phase signal to an amplifier that amplifies the signal and outputs a resulting voltage to a first end of a memory element. A switch, having one end connected to a second end of the memory element, is controlled by the two-phase signal. The switch closes in a first phase of the two-phase signal causing the memory element to store the output voltage of the amplifier, and opens in a second phase causing a vector sum of the output voltage the amplifier to be stored in the memory element and providing the output voltage to a signal output terminal connected to the second end of the memory element.Type: GrantFiled: March 20, 2001Date of Patent: August 17, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Jun-ichiro Hara, Tadata Hatanaka
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Publication number: 20030205996Abstract: An inexpensive and precise magnetic field sensor which comprises a Hall element and an amplifier is provided.Type: ApplicationFiled: March 20, 2001Publication date: November 6, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Jun-Ichiro Hara, Tadata Hatanaka