Patents by Inventor Sam Ochi
Sam Ochi 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: 8242832Abstract: A solar cell device includes a solar cell section configured to output a first voltage upon receiving light. A charge pump circuit includes a first charge pump. The first charge pump includes a first terminal and a second terminal. The first terminal is configured to receive the first voltage from the solar cell section, and the second terminal is configured to output a second voltage that is higher than the first voltage. An output section is configured to receive an output voltage output by the charge pump circuit. The charge pump circuit is formed on a single semiconductor substrate.Type: GrantFiled: January 11, 2010Date of Patent: August 14, 2012Assignee: IXYS CorporationInventors: Sam Ochi, Nathan Zommer
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Patent number: 7719861Abstract: A circuit for transmitting signals includes a transformer having an input side and an output side, the input side having a first end and a second end. A first transistor is coupled to the first end of the transformer, the first transistor being configured to provide a first signal to the first end in response to an input signal transitioning to a first state. A second transistor is coupled to the second end of the transformer; the second transistor being configured to provide a second signal to the second end in response to the input signal transitioning to a second state. The output side is configured to output differential signals according to the first and second signals applied to the transformer.Type: GrantFiled: February 21, 2007Date of Patent: May 18, 2010Assignee: IXYS CorporationInventors: Sam Ochi, Don Humbert
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Publication number: 20100109759Abstract: A solar cell device includes a solar cell section configured to output a first voltage upon receiving light. A charge pump circuit includes a first charge pump. The first charge pump includes a first terminal and a second terminal. The first terminal is configured to receive the first voltage from the solar cell section, and the second terminal is configured to output a second voltage that is higher than the first voltage. An output section is configured to receive an output voltage output by the charge pump circuit. The charge pump circuit is formed on a single semiconductor substrate.Type: ApplicationFiled: January 11, 2010Publication date: May 6, 2010Applicant: IXYS CorporationInventors: Sam Ochi, Nathan Zommer
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Patent number: 7645932Abstract: A solar cell device includes a solar cell section configured to output a first voltage upon receiving light. A charge pump circuit includes a first charge pump. The first charge pump includes a first terminal and a second terminal. The first terminal is configured to receive the first voltage from the solar cell section, and the second terminal is configured to output a second voltage that is higher than the first voltage. An output section is configured to receive an output voltage output by the charge pump circuit. The charge pump circuit is formed on a single semiconductor substrate.Type: GrantFiled: September 7, 2004Date of Patent: January 12, 2010Assignee: IXYS CorporationInventors: Sam Ochi, Nathan Zommer
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Publication number: 20080036398Abstract: A display device includes a display panel; and a backlight panel provided below the display panel and defining a plurality of regions. A first array of light emitting diodes (LEDs) is provided along a first direction, each LED of the first array being coupled to a first line. A driver is coupled to the first line to drive the LEDs coupled to the first line. A second array of LEDs is provided along a second direction, each LEDs of the second array being coupled to a second line. A lighting condition of the regions defined by the backlight panel is controlled by turning on or off the LEDs.Type: ApplicationFiled: August 14, 2007Publication date: February 14, 2008Applicant: IXYS CorporationInventors: Nathan Zommer, Sam Ochi
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Publication number: 20070194831Abstract: A circuit for transmitting signals includes a transformer having an input side and an output side, the input side having a first end and a second end. A first transistor is coupled to the first end of the transformer, the first transistor being configured to provide a first signal to the first end in response to an input signal transitioning to a first state. A second transistor is coupled to the second end of the transformer; the second transistor being configured to provide a second signal to the second end in response to the input signal transitioning to a second state. The output side is configured to output differential signals according to the first and second signals applied to the transformer.Type: ApplicationFiled: February 21, 2007Publication date: August 23, 2007Applicant: IXYS CorporationInventors: Sam Ochi, Don Humbert
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Publication number: 20070024324Abstract: A circuit for sensing a current includes a first upper resistor having a first end coupled to a first end of a sense resistor, the sense resistor being configured to receive an input current. A second upper resistor has a first end coupled to a second end of the sense resistor, so that the sense resistor defines a first potential between the first and second ends of the sense resistor. A first lower resistor is provided between the first upper resistor and the ground. A second lower resistor is provided between the second upper resistor and the ground. An amplifier has a first input node and a second input node, the first input node being coupled to a node between the first upper resistor and the first lower resistor. The second input node is coupled to a node between the to the second upper resistor and the second lower resistor. The first and second input nodes defines a second potential corresponding to the first potential.Type: ApplicationFiled: July 31, 2006Publication date: February 1, 2007Applicant: IXYS CorporationInventor: Sam Ochi
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Publication number: 20060007620Abstract: Embodiments of the present invention provide methods and circuitry for protecting a circuit during hot-swap events. Hot swap protection circuitry includes as overcurrent detection circuit which decouples power from a load. Circuitry is provided to detect ground-fault conditions. Noise detection circuitry is provided to reduce noise in the power that is delivered to the load.Type: ApplicationFiled: June 24, 2005Publication date: January 12, 2006Applicant: Ixys CorporationInventor: Sam Ochi
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Publication number: 20050061361Abstract: A solar cell device includes a solar cell section configured to output a first voltage upon receiving light. A charge pump circuit includes a first charge pump. The first charge pump includes a first terminal and a second terminal. The first terminal is configured to receive the first voltage from the solar cell section, and the second terminal is configured to output a second voltage that is higher than the first voltage. An output section is configured to receive an output voltage output by the charge pump circuit. The charge pump circuit is formed on a single semiconductor substrate.Type: ApplicationFiled: September 7, 2004Publication date: March 24, 2005Applicant: IXYS CorporationInventors: Sam Ochi, Nathan Zommer
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Patent number: 6771119Abstract: An active power filter includes a feedback resistor and a shunt capacitor, an operational amplifier equivalent subcircuit, and a voltage drop source. The shunt capacitor connects the positive terminals of the low noise power supply and the noisy load to the positive terminal of the operational amplifier equivalent subcircuit. The feedback resistor connects the negative terminal of the noisy load and the output of the operational amplifier equivalent subcircuit to the negative terminal of the shunt capacitor. The voltage drop source connects the negative terminal of the low noise power supply to the negative terminal of the operational amplifier equivalent subcircuit. The operational equivalent subcircuit includes an operational amplifier, three resistors, three capacitors, and a transistor. The first resistor connects the positive terminal of the voltage drop source to the negative input terminal of the operational amplifier.Type: GrantFiled: July 23, 2001Date of Patent: August 3, 2004Assignee: IXYS CorporationInventor: Sam Ochi
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Patent number: 6583665Abstract: In a CMOS differential amplifier, first and second input transistors are matched in size to each other, and first and second load transistors are matched in size to each other. The first input transistor, a source follower transistor, and the first load transistor form one current branch of the differential structure while the second input transistor and second load transistor form another current branch of the differential structure. A first current source supplies current to both branches of the differential structure. An output transistor of the first conductivity type has its gate tied to the drain of the second load transistor. A second current source is coupled to the drain of the output transistor. A first source follower bias transistor of the first conductivity type is diode connected, and its drain is coupled to the source of a second source follower bias transistor of the first conductivity type that is also diode connected.Type: GrantFiled: July 23, 2001Date of Patent: June 24, 2003Assignee: IXYS CorporationInventor: Sam Ochi
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Publication number: 20020079966Abstract: In a CMOS differential amplifier, first and second input transistors are matched in size to each other, and first and second load transistors are matched in size to each other. The first input transistor, a source follower transistor, and the first load transistor form one current branch of the differential structure while the second input transistor and second load transistor form another current branch of the differential structure. A first current source supplies current to both branches of the differential structure. An output transistor of the first conductivity type has its gate tied to the drain of the second load transistor. A second current source is coupled to the drain of the output transistor. A first source follower bias transistor of the first conductivity type is diode connected, and its drain is coupled to the source of a second source follower bias transistor of the first conductivity type that is also diode connected.Type: ApplicationFiled: July 23, 2001Publication date: June 27, 2002Applicant: IXYS CorporationInventor: Sam Ochi
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Publication number: 20020047743Abstract: An active power filter includes a feedback resistor and a shunt capacitor, an operational amplifier equivalent subcircuit, and a voltage drop source. The shunt capacitor connects the positive terminals of the low noise power supply and the noisy load to the positive terminal of the operational amplifier equivalent subcircuit. The feedback resistor connects the negative terminal of the noisy load and the output of the operational amplifier equivalent subcircuit to the negative terminal of the shunt capacitor. The voltage drop source connects the negative terminal of the low noise power supply to the negative terminal of the operational amplifier equivalent subcircuit. The operational equivalent subcircuit includes an operational amplifier, three resistors, three capacitors, and a transistor. The first resistor connects the positive terminal of the voltage drop source to the negative input terminal of the operational amplifier.Type: ApplicationFiled: July 23, 2001Publication date: April 25, 2002Inventor: Sam Ochi