Patents by Inventor Stefan Mastovich
Stefan Mastovich 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: 10397025Abstract: A technique for attenuating common mode transient events uses a differential receiver circuit including a band-stop filter having a stopband fSB around a notch frequency fn of a received signal. The differential receiver circuit includes a first high-pass filter coupled in series with the band-stop filter. The notch frequency fn is less than a carrier frequency fc of a signal received by the differential receiver circuit. The band-stop filter may include a buffer circuit and a notch filter coupled in series with the buffer circuit. The notch filter may have a second stopband around the notch frequency fn. The differential receiver circuit may have a propagation delay that is independent of a pulse width of common mode transient energy attenuated by the differential receiver circuit.Type: GrantFiled: August 23, 2017Date of Patent: August 27, 2019Assignee: Silicon Laboratories Inc.Inventors: Mohammad Al-Shyoukh, Stefan Mastovich
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Publication number: 20190068410Abstract: A technique for attenuating common mode transient events uses a differential receiver circuit including a band-stop filter having a stopband fSB around a notch frequency fn of a received signal. The differential receiver circuit includes a first high-pass filter coupled in series with the band-stop filter. The notch frequency fn is less than a carrier frequency fc of a signal received by the differential receiver circuit. The band-stop filter may include a buffer circuit and a notch filter coupled in series with the buffer circuit. The notch filter may have a second stopband around the notch frequency fn. The differential receiver circuit may have a propagation delay that is independent of a pulse width of common mode transient energy attenuated by the differential receiver circuit.Type: ApplicationFiled: August 23, 2017Publication date: February 28, 2019Inventors: Mohammad Al-Shyoukh, Stefan Mastovich
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Publication number: 20150235606Abstract: An LCD controller includes a charge pump circuit for generating a charge voltage responsive to an external voltage and a clock signal. An oscillator generates the clock signal responsive to at least one bias voltage. The oscillator has a high power mode of operation and a low power mode of operation. Bias circuitry for applies the at least one bias voltage to the oscillator. The at least one bias voltage is applied to the oscillator from an external source in the high power mode of operation and the at least one bias voltage is applied to the oscillator from a source within the oscillator in the low power mode of operation. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an LCD display responsive to the charge voltage.Type: ApplicationFiled: December 15, 2014Publication date: August 20, 2015Inventors: Douglas Piasecki, Thomas Saroshan David, Timothy T. Rueger, Stefan Mastovich, Jia-Hau Liu
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Patent number: 9058761Abstract: An LCD controller includes a charge pump for generating a charge voltage responsive to an external voltage and a clock signal. The controller further includes an oscillator for generating the clock signal responsive to an oscillator control signal. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an associated LCD display. A loop control circuit within the LCD controller monitors an LCD driver voltage from the LCD driver voltage circuit and generates the oscillator control signal responsive thereto to enable and disable the oscillator.Type: GrantFiled: June 30, 2009Date of Patent: June 16, 2015Assignee: Silicon Laboratories Inc.Inventors: Douglas Piasecki, Thomas S. David, Timothy Thomas Rueger, Stefan Mastovich, Jia-Hau Liu
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Patent number: 8913051Abstract: An LCD controller includes a charge pump circuit for generating a charge voltage responsive to an external voltage and a clock signal. An oscillator generates the clock signal responsive to at least one bias voltage. The oscillator has a high power mode of operation and a low power mode of operation. Bias circuitry for applies the at least one bias voltage to the oscillator. The at least one bias voltage is applied to the oscillator from an external source in the high power mode of operation and the at least one bias voltage is applied to the oscillator from a source within the oscillator in the low power mode of operation. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an LCD display responsive to the charge voltage.Type: GrantFiled: June 30, 2009Date of Patent: December 16, 2014Assignee: Silicon Laboratories Inc.Inventors: Douglas Piasecki, Thomas S. David, Timothy Thomas Rueger, Stefan Mastovich, Jia-Hau Liu
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Patent number: 8143961Abstract: In at least one embodiment of the invention, an apparatus includes an integrated circuit, which includes a first oscillator terminal and an oscillator discrimination circuit. The oscillator discrimination circuit is operative to generate an indicator of a capacitance value of a load capacitance external to the integrated circuit and coupled to one of the first and second oscillator terminals. The indicator is generated according to a charge time of a reference node coupled to a reference capacitor and a charge time of a node coupled to the first oscillator terminal. The node and the reference node are charged using substantially matched currents.Type: GrantFiled: March 30, 2010Date of Patent: March 27, 2012Assignee: Silicon Laboratories Inc.Inventor: Stefan Mastovich
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Publication number: 20110241787Abstract: In at least one embodiment of the invention, an apparatus includes an integrated circuit, which includes a first oscillator terminal and an oscillator discrimination circuit. The oscillator discrimination circuit is operative to generate an indicator of a capacitance value of a load capacitance external to the integrated circuit and coupled to one of the first and second oscillator terminals. The indicator is generated according to a charge time of a reference node coupled to a reference capacitor and a charge time of a node coupled to the first oscillator terminal. The node and the reference node are charged using substantially matched currents.Type: ApplicationFiled: March 30, 2010Publication date: October 6, 2011Inventor: Stefan Mastovich
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Publication number: 20110157140Abstract: An output pad control logic comprises an output buffer including a plurality of transistors connected to drive signals for an output pad. Each of the plurality of transistors includes an n-well. An n-well generator connects a first voltage to the n-wells of the plurality of transistors of the output buffer in a first mode of operation when a system rail voltage exceeds a pad voltage applied to the output pad. The n-well generator connects the pad voltage to the n-wells of the plurality of transistors of the output buffer in a second mode of operation when the pad voltage applied to the output buffer exceeds the system rail voltage. A switching circuit is responsive to at least one control signal to connect the system rail voltage as the first voltage when the output pad is not driving an LCD display and to connect a larger of the system rail voltage and an LCD drive voltage as the first voltage when the output pad is driving the LCD display.Type: ApplicationFiled: December 31, 2009Publication date: June 30, 2011Applicant: SILICON LABORATORIES INC.Inventors: DOUGLAS PIASECKI, THOMAS S. DAVID, TIMOTHY THOMAS RUEGER, STEFAN MASTOVICH, JIA-HAU LIU
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Publication number: 20100328295Abstract: An LCD controller includes a charge pump for generating a charge voltage responsive to an external voltage and a clock signal. The controller further includes an oscillator for generating the clock signal responsive to an oscillator control signal. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an associated LCD display. A loop control circuit within the LCD controller monitors an LCD driver voltage from the LCD driver voltage circuit and generates the oscillator control signal responsive thereto to enable and disable the oscillator.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Applicant: SILICON LABORATORIES INC.Inventors: DOUGLAS PIASECKI, THOMAS S. DAVID, TIMOTHY THOMAS RUEGER, STEFAN MASTOVICH, JIA-HAU LIU
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Publication number: 20100328199Abstract: An LCD controller includes a charge pump circuit for generating a charge voltage responsive to an external voltage and a clock signal. An oscillator generates the clock signal responsive to at least one bias voltage. The oscillator has a high power mode of operation and a low power mode of operation. Bias circuitry for applies the at least one bias voltage to the oscillator. The at least one bias voltage is applied to the oscillator from an external source in the high power mode of operation and the at least one bias voltage is applied to the oscillator from a source within the oscillator in the low power mode of operation. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an LCD display responsive to the charge voltage.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Applicant: SILICON LABORATORIES INC.Inventors: DOUGLAS PIASECKI, THOMAS S. DAVID, TIMOTHY THOMAS RUEGER, STEFAN MASTOVICH, JIA-HAU LIU
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Publication number: 20100328286Abstract: An LCD controller includes a charge pump circuit for generating a charge voltage responsive to an external voltage and a clock signal. An oscillator generates the clock signal responsive to at least one bias voltage. The oscillator has a high power mode of operation and a low power mode of operation. Bias circuitry for applies the at least one bias voltage to the oscillator. The at least one bias voltage is applied to the oscillator from an external source in the high power mode of operation and the at least one bias voltage is applied to the oscillator from a source within the oscillator in the low power mode of operation. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an LCD display responsive to the charge voltage.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Applicant: SILICON LABORATORIES INC.Inventors: DOUGLAS PIASECKI, THOMAS S. DAVID, TIMOTHY THOMAS RUEGER, STEFAN MASTOVICH, JIA-HAU LIU