Patents by Inventor Ivan Duzevik
Ivan Duzevik 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: 11949383Abstract: Described are concepts, circuits, systems and techniques directed toward N-phase control techniques useful in the design and control of supply generators configured for use in a wide variety of power management applications including, but not limited to mobile applications.Type: GrantFiled: March 9, 2023Date of Patent: April 2, 2024Assignee: Murata Manufacturing Co., Ltd.Inventors: David J. Perreault, James Garrett, Sri Harsh Pakala, Brendan Metzner, Ivan Duzevik, John R. Hoversten, Yevgeniy A. Tkachenko
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Publication number: 20240080004Abstract: Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through “supply modulation” (also referred to as “drain modulation” or “collector modulation”), in which supply voltages provided to rf amplifiers is adjusted dynamically (“modulated”) over time depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf “traffic” variations.Type: ApplicationFiled: July 17, 2023Publication date: March 7, 2024Applicant: Murata Manufacturing Co., Ltd.Inventors: James Garrett, Sri Harsh Pakala, Brendan Metzner, Ivan Duzevik, David J. Perreault, John R. Hoversten, Yevgeniy A. Tkachenko
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Publication number: 20230378921Abstract: Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through “supply modulation” (also referred to as “drain modulation” or “collector modulation”), in which supply voltages provided to rf amplifiers is adjusted dynamically (“modulated”) over time depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf “traffic” variations.Type: ApplicationFiled: July 17, 2023Publication date: November 23, 2023Applicant: Murata Manufacturing Co., Ltd.Inventors: James Garrett, Sri Harsh Pakala, Brendan Metzner, Ivan Duzevik, David J. Perreault, John R. Hoversten, Yevgeniy A. Tkachenko
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Publication number: 20230361730Abstract: Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through “supply modulation” (also referred to as “drain modulation” or “collector modulation”), in which supply voltages provided to rf amplifiers is adjusted dynamically (“modulated”) over time depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf “traffic” variations.Type: ApplicationFiled: July 17, 2023Publication date: November 9, 2023Applicant: Murata Manufacturing Co., Ltd.Inventors: James Garrett, Sri Harsh Pakala, Brendan Metzner, Ivan Duzevik, David J. Perreault, John R. Hoversten, Yevgeniy A. Tkachenko
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Patent number: 11637531Abstract: Described are concepts, circuits, systems and techniques directed toward N-phase control techniques useful in the design and control of supply generators configured for use in a wide variety of power management applications including, but not limited to mobile applications.Type: GrantFiled: September 4, 2020Date of Patent: April 25, 2023Assignee: Murata Manufacturing Co., Ltd.Inventors: David J. Perreault, James Garrett, Sri Harsh Pakala, Brendan Metzner, Ivan Duzevik, John R. Hoversten, Yevgeniy A. Tkachenko
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Publication number: 20220149725Abstract: Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through “supply modulation” (also referred to as “drain modulation” or “collector modulation”), in which supply voltages provided to rf amplifiers is adjusted dynamically (“modulated”) over time depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf “traffic” variations.Type: ApplicationFiled: January 10, 2022Publication date: May 12, 2022Applicant: Eta Wireless, Inc.Inventors: James Garrett, Sri Harsh Pakala, Brendan Metzner, Ivan Duzevik, David J. Perreault, John R. Hoversten, Yevgeniy A. Tkachenko
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Patent number: 11245367Abstract: Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through “supply modulation” (also referred to as “drain modulation” or “collector modulation”), in which supply voltages provided to rf amplifiers is adjusted dynamically (“modulated”) overtime depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf “traffic” variations.Type: GrantFiled: July 8, 2020Date of Patent: February 8, 2022Assignee: ETA WIRELESS, INC.Inventors: James Garrett, Sri Harsh Pakala, Brendan Metzner, Ivan Duzevik, David J. Perreault, John R. Hoversten, Yevgeniy A. Tkachenko
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Publication number: 20210313936Abstract: Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through “supply modulation” (also referred to as “drain modulation” or “collector modulation”), in which supply voltages provided to rf amplifiers is adjusted dynamically (“modulated”) overtime depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf “traffic” variations.Type: ApplicationFiled: July 8, 2020Publication date: October 7, 2021Inventors: James GARRETT, Sri Harsh PAKALA, Brendan METZNER, Ivan DUZEVIK, David J. PERREAULT, John R. HOVERSTEN, Yevgeniy A. TKACHENKO
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Patent number: 10244591Abstract: A voltage/current regulator supplying controlled current with PVT headroom adjustment. In an example application, an LED backlight driver controls ILED string current, and controls a voltage regulator supplying VOUT string voltage with sufficient headroom voltage VHDRM to supply the ILED string current. The LED driver controls ILED string current with an MLED current control transistor, including gate drive referenced to a reference voltage VREF. VOUT/VHDRM are adjusted for PVT operating conditions by generating a replica/reference current ILED/RATIO (proportional to ILED string current) with a replica current control transistor MLED/RATIO based on VREF. ILED/RATIO is mirrored to a second replica MLED/RATIO transistor that saturates at a PVT_REF reference voltage corresponding to a minimum voltage that can supply the required ILED current (as represented by the ILED/RATIO replica/reference current), accounting for PVT operating conditions.Type: GrantFiled: December 31, 2014Date of Patent: March 26, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: James J. McDonald, II, Ivan Duzevik
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Publication number: 20160143102Abstract: A voltage/current regulator supplying controlled current with PVT headroom adjustment. In an example application, an LED backlight driver controls ILED string current, and controls a voltage regulator supplying VOUT string voltage with sufficient headroom voltage VHDRM to supply the ILED string current. The LED driver controls ILED string current with an MLED current control transistor, including gate drive referenced to a reference voltage VREF. VOUT/VHDRM are adjusted for PVT operating conditions by generating a replica/reference current ILED/RATIO (proportional to ILED string current) with a replica current control transistor MLED/RATIO based on VREF. ILED/RATIO is mirrored to a second replica MLED/RATIO transistor that saturates at a PVT_REF reference voltage corresponding to a minimum voltage that can supply the required ILED current (as represented by the ILED/RATIO replica/reference current), accounting for PVT operating conditions.Type: ApplicationFiled: December 31, 2014Publication date: May 19, 2016Inventors: James J. McDonald, II, Ivan Duzevik
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Patent number: 8638125Abstract: A low voltage differential signal (LVDS) driver circuit with reduced power consumption. A pre-driver stage, implemented as a differential current mode amplifier, is driven by the differential input signal and provides a corresponding differential drive signal, which drives the output stage, implemented as a differential voltage mode amplifier, which, in turn, provides the differential output signal for the load. Total current consumption equals the load current, which is provided by the output stage, plus a much smaller current used by the pre-driver stage.Type: GrantFiled: June 14, 2011Date of Patent: January 28, 2014Assignee: Texas Instruments IncorporatedInventors: Khaldoon Abugharbieh, Jitendra Mohan, Ivan Duzevik
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Patent number: 7719324Abstract: A low voltage differential signal (LVDS) transmitter with output power control. Internal sensing circuitry monitors output current flow through the termination impedance. When a proper termination impedance is not connected to the output, the resulting improper output current flow (e.g., zero output current when no termination impedance is connected) is detected by the sensing circuitry, which causes the supply current to the output driver circuitry to be reduced. Additionally, further in response to such detection of improper output current flow, the sensing circuitry can cause the output voltage to be limited, e.g., clamped, at a predetermined maximum magnitude.Type: GrantFiled: April 4, 2008Date of Patent: May 18, 2010Assignee: National Semiconductor CorporationInventors: Kenneth P. Snowdon, Ivan Duzevik
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Patent number: 7477077Abstract: An apparatus, device, and method for loss of signal detection in a receiver are provided. A reference circuit is operable to rectify a reference signal. An input circuit is operable to rectify an input signal. A comparator is operable to compare outputs of the reference circuit and the input circuit and to generate an output signal based on the comparison. The output signal indicates whether the input signal falls within threshold limits defined by the reference signal. A second reference circuit and a second input circuit could also be used, and the reference circuits and input circuits can be selectively enabled and disabled based on which of multiple differential pairs is enabled in a receiver receiving the input signal. The differential pairs can be used in the receiver to generate an output signal based on the input signal.Type: GrantFiled: December 5, 2006Date of Patent: January 13, 2009Assignee: National Semiconductor CorporationInventors: Arlo Aude, Jitendra Mohan, Ivan Duzevik
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Patent number: 7474133Abstract: An apparatus, device, and method for high-speed serial communications are provided. An input circuit is operable to receive an input signal, where the input circuit includes transistors forming (i) a first differential pair associated with a first current source and (ii) a second differential pair associated with a second current source. An output circuit is coupled to the input circuit and is operable to generate an output signal based on the input signal. A sensing circuit is operable to estimate a voltage associated with one of the current sources. A comparator is operable to compare the estimated voltage and a reference voltage and to selectively enable one of the differential pairs and disable another of the differential pairs based on the comparison. The differential pairs could be enabled and disabled using a first switch associated with the first differential pair and a second switch associated with the second differential pair.Type: GrantFiled: December 5, 2006Date of Patent: January 6, 2009Assignee: National Semiconductor CorporationInventors: Arlo Aude, Jitendra Mohan, Ivan Duzevik
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Patent number: 7071739Abstract: A differential driver circuit is configured to automatically adjust its source resistance to be substantially similar to a termination resistance. The differential driver circuit includes a variable resistance circuit on each leg of the differential driver circuit. A replica of one leg of the differential driver circuit is configured for adjusting the variable resistance circuits so that the differential driver circuit's source resistance appears to a load as substantially similar to the termination resistance.Type: GrantFiled: January 8, 2004Date of Patent: July 4, 2006Assignee: National Semiconductor CorporationInventors: Ivan Duzevik, Steven Mark Macaluso