Patents by Inventor Andrew Weil
Andrew Weil 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: 11728822Abstract: Certain aspects of the present disclosure provide a digital-to-analog converter (DAC) system. The DAC system generally includes a plurality of current steering cells, each comprising a current source coupled to at least two current steering switches, wherein control inputs of the at least two current steering switches are coupled to an input path of the DAC system. The DAC system may also include a current source toggle circuit configured to selectively disable the current source of at least one of the plurality of current steering cells, and a feedforward path coupled between the input path and at least one control input of the current source toggle circuit.Type: GrantFiled: June 28, 2021Date of Patent: August 15, 2023Assignee: QUALCOMM IncorporatedInventors: Shahin Mehdizad Taleie, Dongwon Seo, Ashok Swaminathan, Gurkanwal Singh Sahota, Andrew Weil, Haibo Fei
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Publication number: 20220416804Abstract: Certain aspects of the present disclosure provide a digital-to-analog converter (DAC) system. The DAC system generally includes a plurality of current steering cells, each comprising a current source coupled to at least two current steering switches, wherein control inputs of the at least two current steering switches are coupled to an input path of the DAC system. The DAC system may also include a current source toggle circuit configured to selectively disable the current source of at least one of the plurality of current steering cells, and a feedforward path coupled between the input path and at least one control input of the current source toggle circuit.Type: ApplicationFiled: June 28, 2021Publication date: December 29, 2022Inventors: Shahin MEHDIZAD TALEIE, Dongwon SEO, Ashok SWAMINATHAN, Gurkanwal Singh SAHOTA, Andrew WEIL, Haibo FEI
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Publication number: 20220352899Abstract: Certain aspects of the present disclosure provide a digital-to-analog conversion circuit. The digital-to-analog conversion circuit generally includes a detection circuit configured to detect digital transitions in a digital input signal. The digital-to-analog conversion circuit also includes a clock-gating circuit having an input coupled to an output of the detection circuit. The clock-gating circuit is configured to gate a clock signal for the digital-to-analog conversion circuit based on an output signal from the detection circuit.Type: ApplicationFiled: April 29, 2021Publication date: November 3, 2022Inventors: Nitz SAPUTRA, Ashok SWAMINATHAN, Andrew WEIL
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Patent number: 11271576Abstract: Certain aspects of the present disclosure provide a digital-to-analog converter (DAC). The DAC generally includes a plurality of current-steering cells, each having a bypass switch, and a resistor ladder circuit having multiple segments. Each segment may include a first resistive element and a second resistive element, the bypass switch being configured to selectively provide a bypass current to a common node between the first resistive element and the second resistive element.Type: GrantFiled: April 6, 2021Date of Patent: March 8, 2022Assignee: QUALCOMM IncorporatedInventors: Andrew Weil, Ashok Swaminathan, Siyu Yang
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Patent number: 10958279Abstract: Certain aspects of the present disclosure provide apparatus and techniques for digital-to-analog conversion. One example apparatus generally includes a first digital-to-analog converter (DAC) having an input coupled to a digital input node of the apparatus, a second DAC, a digital processor coupled between the digital input node and an input of the second DAC, and a combiner coupled to the first DAC and the second DAC.Type: GrantFiled: September 6, 2019Date of Patent: March 23, 2021Assignee: QUALCOMM IncorporatedInventors: Debesh Bhatta, Kevin Jia-Nong Wang, Karthik Nagarajan, John Abcarius, Andrew Weil, Christian Venerus, Jeffrey Mark Hinrichs
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Publication number: 20210075434Abstract: Certain aspects of the present disclosure provide apparatus and techniques for digital-to-analog conversion. One example apparatus generally includes a first digital-to-analog converter (DAC) having an input coupled to a digital input node of the apparatus, a second DAC, a digital processor coupled between the digital input node and an input of the second DAC, and a combiner coupled to the first DAC and the second DAC.Type: ApplicationFiled: September 6, 2019Publication date: March 11, 2021Inventors: Debesh BHATTA, Kevin Jia-Nong WANG, Karthik NAGARAJAN, John ABCARIUS, Andrew WEIL, Christian VENERUS, Jeffrey Mark HINRICHS
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Publication number: 20200366305Abstract: Certain aspects of the present disclosure are directed to a digital-to-analog converter (DAC) system. The DAC system generally includes a first current-steering DAC having a positive output, a negative output, and a bypass output; a common-mode (CM) path coupled between the positive and negative outputs; and a CM current compensation path coupled to the CM path.Type: ApplicationFiled: May 14, 2019Publication date: November 19, 2020Inventors: Andrew WEIL, Jaswinder SINGH, Debesh BHATTA, Haibo FEI
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Patent number: 10840929Abstract: Certain aspects of the present disclosure are directed to a digital-to-analog converter (DAC) system. The DAC system generally includes a first current-steering DAC having a positive output, a negative output, and a bypass output; a common-mode (CM) path coupled between the positive and negative outputs; and a CM current compensation path coupled to the CM path.Type: GrantFiled: May 14, 2019Date of Patent: November 17, 2020Assignee: QUALCOMM IncorporatedInventors: Andrew Weil, Jaswinder Singh, Debesh Bhatta, Haibo Fei
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Patent number: 10516412Abstract: An interleaved digital-to-analog converter (DAC) system may include a first sub-DAC and a second sub-DAC and may be configured to provide both a converter output signal and a calibration output signal. The converter output signal may be provided by adding the first sub-DAC output signal and the second sub-DAC output signal. The calibration output signal may be provided by subtracting one of the first and second sub-DAC output signals from the other. The calibration output signal may be used as feedback to adjust the phase of one of the sub-DACs relative to the other, to promote phase matching their output signals.Type: GrantFiled: September 21, 2018Date of Patent: December 24, 2019Assignee: QUALCOMM IncorporatedInventors: Shahin Mehdizad Taleie, Ashok Swaminathan, Sudharsan Kanagaraj, Negar Rashidi, Siyu Yang, Behnam Sedighi, Honghao Ji, Jaswinder Singh, Andrew Weil, Dongwon Seo, Xilin Liu
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Patent number: 10461768Abstract: Certain aspects of the present disclosure provide a digital-to-analog converter (DAC). The DAC generally includes a plurality of transistors selectively coupled to an output of the DAC, and a biasing circuit coupled to gates of the plurality of transistors. The biasing circuit may include a first transistor having a gate coupled to a drain of the first transistor, a first buffer having an input coupled to the gate of the first transistor, a second transistor having a gate coupled to an output of the first buffer, a first resistive-capacitive (RC) circuit having a first resistive element and a first capacitive element, the first RC circuit being coupled between the gate of the first transistor and the gate of the second transistor, and a first switch coupled between the first resistive element and the first capacitive element.Type: GrantFiled: December 4, 2018Date of Patent: October 29, 2019Assignee: QUALCOMM IncorporatedInventors: Zongyu Dong, Andrew Weil, Dongwon Seo
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Patent number: 10454487Abstract: The present disclosure describes aspects of segmented resistor architecture for digital-to-analog converters (DACs). In some aspects, a DAC circuit is implemented with a first resistor network coupled to a set of binary code-controlled current sources and a second resistor network that includes a resistor coupled between the first resistor network and an output of the DAC circuit. A set of thermometer code-controlled current sources are coupled to a node of the second resistor network and provide varying amounts of current. This current is scaled based on a resistance of the second resistor network's resistor, which is higher than a resistance of the first resistor network and effective to increase a combined output impedance of the first and second resistor networks. The increase of output impedance reduces noise of the resistor networks that transfers to the output of the DAC circuit, thereby improving signal-to-noise performance of the DAC circuit.Type: GrantFiled: August 30, 2018Date of Patent: October 22, 2019Assignee: QUALCOMM IncorporatedInventors: Behnam Sedighi, Andrew Weil, Nitz Saputra
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Publication number: 20090274721Abstract: Disclosed are topical compositions comprising extracts of Hypsizygus ulmarius in amounts that are effective to influence LTB4-mediated chemotaxis and/or IL-1? mediated adhesion of polymorphonuclear leukocytes. The Hypsizygus ulmarius extract may be used alone or in combination with secondary anti-inflammatory and skin active agents, such as other mushroom and/or natural extracts. The secondary anti-inflammatory agents may or may not function by antagonizing LTB4-mediated chemotaxis and IL-1? mediated adhesion. The extract may be incorporated into a cosmetically acceptable vehicle. The present invention includes methods of treating skin inflammation by applying to inflamed skin, anti-inflammatory effective amounts of Hypsizygus ulmarius extract in a defined treatment regimen.Type: ApplicationFiled: July 7, 2009Publication date: November 5, 2009Inventors: Chia Chen, Andrew Weil, Paul Stamets
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Patent number: 7575764Abstract: Disclosed are topical compositions comprising extracts of Hypsizygus ulmarius in amounts that are effective to influence LTB4-mediated chemotaxis and/or IL-1? mediated adhesion of polymorphonuclear leukocytes. The hypsizygus ulmarius extract may be used alone or in combination with secondary anti-inflammatory and skin active agents, such as other mushroom and/or natural extracts. The secondary anti-inflammatory agents may or may not function by antagonizing LTB4-mediated chemotaxis and IL-1? mediated adhesion. The extract may be incorporated into a cosmetically acceptable vehicle. The present invention includes methods of treating skin inflammation by applying to inflamed skin, anti-inflammatory effective amounts of Hypsizygus ulmarius extract in a defined treatment regimen.Type: GrantFiled: September 29, 2006Date of Patent: August 18, 2009Assignee: ELC Management LLCInventors: Chia Chen, Andrew Weil, Paul Stamets
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Publication number: 20080286298Abstract: Disclosed are topical compositions comprising extracts of Hypsizygus ulmarius in amounts that are effective to influence LTB4-mediated chemotaxis and/or IL-1? mediated adhesion of polymorphonuclear leukocytes. The hypsizygus ulmarius extract may be used alone or in combination with secondary anti-inflammatory and skin active agents, such as other mushroom and/or natural extracts. The secondary anti-inflammatory agents may or may not function by antagonizing LTB4-mediated chemotaxis and IL-1? mediated adhesion. The extract may be incorporated into a cosmetically acceptable vehicle. The present invention includes methods of treating skin inflammation by applying to inflamed skin, anti-inflammatory effective amounts of Hypsizygus ulmarius extract in a defined treatment regimen.Type: ApplicationFiled: September 29, 2006Publication date: November 20, 2008Inventors: Chia Chen, Andrew Weil, Paul Stamets
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Publication number: 20020155163Abstract: A daily multi-vitamin and mineral combination for use in the adjunct care of humans with asthma comprising thiamin, riboflavin, niacin, Vitamin B6, folate, Vitamin B12, biotin, pantothenic acid, choline, inositol, para-amino benzoic acid, Vitamin C, calcium, magnesium, iodine, selenium, manganese, chromium, molybdenum, boron, zinc, potassium, silicon, sulfur, vanadium, citrus bioflavonoid complex, hesperidin complex, rutin, Vitamin A, Vitamin D, Vitamin E, lycopene, lutein, Coenzyme Q10 and N-acetyl cysteine. For adjunct care of humans with diabetes, alpha-lipoic acid is substituted for N-acetyl cysteine and the amount of inositol is increased. A method of supplementing the nutritional intake of humans with diabetes and/or asthma through daily oral administration of the appropriate multi-vitamin and mineral combination.Type: ApplicationFiled: December 27, 1999Publication date: October 24, 2002Inventors: SAMUEL D. BENJAMIN, ANDREW WEIL