Patents by Inventor Mariam Hoseini
Mariam Hoseini 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: 10651811Abstract: A switched-capacitor gain stage circuit and method include an amplifier connected to an input sampling circuit with sampling switched capacitors for coupling an input voltage and a first or second reference voltage to one or more central nodes during a sampling phase and for coupling the one or more central nodes to an amplifier input during a gain phase, wherein a reference loading circuit uses a plurality of sampling switched capacitors connected in a switching configuration to selectively couple a first reference voltage and/or a second reference voltage to the central node by pre-charging the plurality of sampling switched capacitors with the first and second reference voltages during the sampling phase, and by coupling each of the first and second reference voltages to at least one of the plurality of sampling switched capacitors when connected to the central node during the gain phase.Type: GrantFiled: May 18, 2018Date of Patent: May 12, 2020Assignee: NXP USA, Inc.Inventors: Douglas A. Garrity, Mariam Hoseini, Mohammad N. Kabir, Brandt Braswell
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Publication number: 20190356290Abstract: A switched-capacitor gain stage circuit and method include an amplifier connected to an input sampling circuit with sampling switched capacitors for coupling an input voltage and a first or second reference voltage to one or more central nodes during a sampling phase and for coupling the one or more central nodes to an amplifier input during a gain phase, wherein a reference loading circuit uses a plurality of sampling switched capacitors connected in a switching configuration to selectively couple a first reference voltage and/or a second reference voltage to the central node by pre-charging the plurality of sampling switched capacitors with the first and second reference voltages during the sampling phase, and by coupling each of the first and second reference voltages to at least one of the plurality of sampling switched capacitors when connected to the central node during the gain phase.Type: ApplicationFiled: May 18, 2018Publication date: November 21, 2019Applicant: NXP USA, Inc.Inventors: Douglas A. Garrity, Mariam Hoseini, Mohammad N. Kabir, Brandt Braswell
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Patent number: 10211820Abstract: Embodiments of a multi-stage clock generator architecture that generates multiple non-overlapping clock phase signals includes: a first stage clock generator configured to: divide an input clock signal into a number of clock signals, synchronize each clock signal to a transition edge of a synchronization signal to produce synchronized clock signals, wherein the synchronization signal is a delayed version of the input clock signal by at least an amount sufficient to ensure that each of the clock signals become stable in response to a transition edge of the input clock signal, and generate a number of clock phase signals based on the synchronized clock signals. The architecture also includes a later stage clock generator configured to: generate a set of mutually non-overlapping clock phase signals based on the input clock signal.Type: GrantFiled: November 29, 2016Date of Patent: February 19, 2019Assignee: NXP USA, Inc.Inventors: Mohammad Nizam Kabir, Mariam Hoseini, Rakesh Shiwale, Doug Garrity
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Patent number: 10069507Abstract: A switched-capacitor gain stage circuit and method include an amplifier connected to an input sampling circuit with sampling switched capacitors for coupling an input voltage and a first or second reference voltage to one or more central nodes during a sampling phase and for coupling the one or more central nodes to an amplifier input during a gain phase, wherein a common-mode reference voltage generation circuit uses one or more additional sampling switched capacitors to selectively couple the first and second reference voltages to the amplifier input during the gain phase when the input voltage is between the high and low threshold voltages using a switching configuration of switches that are controllable to connect the sampling switched capacitors to the one or more central nodes in the sampling phase, and to connect the amplifier output in feedback to the input sampling circuit in the gain phase while simultaneously connecting the one or more central nodes to the first amplifier input.Type: GrantFiled: April 6, 2018Date of Patent: September 4, 2018Assignee: NXP USA, Inc.Inventors: Mariam Hoseini, Douglas A. Garrity, Mohammad N. Kabir, Brandt Braswell
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Patent number: 9991900Abstract: A digital to analog converter convert digital data in binary format to thermometer bit vectors. A first set of the thermometer bit vectors corresponds to most significant bits of the digital data and a second set of the thermometer bit vectors corresponds to least significant bits of the digital data. Connections of first current sources corresponding to the first set of the thermometer bit vectors and second current sources corresponding to the second set of the thermometer bit vectors are dynamically and randomly alternated to a first output line and a second output line. Calibration current is applied to the second current sources so a total current of the second current sources and the calibration current is within a predetermined range of an average current of the first current sources.Type: GrantFiled: August 2, 2017Date of Patent: June 5, 2018Assignee: NXP USA, Inc.Inventors: Mohammad Nizam Kabir, Mariam Hoseini, Brandt Braswell
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Publication number: 20180152181Abstract: Embodiments of a multi-stage clock generator architecture that generates multiple non-overlapping clock phase signals includes: a first stage clock generator configured to: divide an input clock signal into a number of clock signals, synchronize each clock signal to a transition edge of a synchronization signal to produce synchronized clock signals, wherein the synchronization signal is a delayed version of the input clock signal by at least an amount sufficient to ensure that each of the clock signals become stable in response to a transition edge of the input clock signal, and generate a number of clock phase signals based on the synchronized clock signals. The architecture also includes a later stage clock generator configured to: generate a set of mutually non-overlapping clock phase signals based on the input clock signal.Type: ApplicationFiled: November 29, 2016Publication date: May 31, 2018Inventors: Mohammad Nizam KABIR, Mariam HOSEINI, Rakesh SHIWALE, Doug GARRITY
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Patent number: 9748964Abstract: Embodiments of a multi-channel analog to digital converter (ADC) include: a first multiplying digital to analog converter (MDAC) having: first and second switched capacitor circuit paths respectively coupled between first and second input nodes and an input node of a first gain element, a second MDAC having: third and fourth switched capacitor circuit paths respectively coupled between third and fourth input nodes and an input node of a second gain element, a third MDAC having: fifth and sixth switched capacitor circuit paths respectively coupled between a fifth input node and an input node of a third gain element, seventh and eighth switched capacitor circuit paths respectively coupled between a sixth input node and the input node of the third gain element, the fifth input node coupled to an output node of the first gain element, the sixth input node coupled to an output node of the second gain element.Type: GrantFiled: November 29, 2016Date of Patent: August 29, 2017Assignee: NXP USA, Inc.Inventors: Mohammad Nizam Kabir, Doug Garrity, Mariam Hoseini, Rakesh Shiwale
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Patent number: 9548757Abstract: A digital to analog converter including a current source for providing a master current, a first sub digital to analog converter coupled to the current source which generates a plurality of currents, and a second sub digital to analog converter coupled to at least one of the plurality of currents from the first sub digital to analog converter which generates a second plurality of currents. The digital to analog converter also includes an overlap adjustment circuit coupled with the second sub digital to analog converter which adds current. The digital to analog converter is configured to operate in a first mode for generating a sine wave with a first bit level accuracy and, when in the first mode, the overlap adjustment circuit adds no current.Type: GrantFiled: January 8, 2016Date of Patent: January 17, 2017Assignee: NXP USA, Inc.Inventors: Mohammad Nizam Kabir, Brandt Braswell, Mariam Hoseini
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Patent number: 9509332Abstract: A sigma-delta (??) analog-to-digital converter (ADC) comprises a main ?? modulator configured to receive an analog input signal at a main ?? modulator input and to provide a main digital output signal representative of the analog input signal and an auxiliary ?? modulator configured to receive an auxiliary input signal at an auxiliary ?? modulator input and to provide an auxiliary digital output signal, wherein the ?? ADC comprises a shared integrator stage, the shared integrator stage is configured to be used by the main ?? modulator and the auxiliary ?? modulator, wherein, alternatingly, the shared integrator stage is selectively communicatively coupled to receive the analog input signal when configured to be used by the main ?? modulator and selectively communicatively coupled to receive the auxiliary input signal when configured to be used by the auxiliary ?? modulator.Type: GrantFiled: November 6, 2015Date of Patent: November 29, 2016Assignee: Freescale Semiconductor, Inc.Inventors: Douglas A. Garrity, Mariam Hoseini, Mark J. Stachew
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Publication number: 20160269041Abstract: A digital to analog converter including a current source for providing a master current, a first sub digital to analog converter coupled to the current source which generates a plurality of currents, and a second sub digital to analog converter coupled to at least one of the plurality of currents from the first sub digital to analog converter which generates a second plurality of currents. The digital to analog converter also includes an overlap adjustment circuit coupled with the second sub digital to analog converter which adds current. The digital to analog converter is configured to operate in a first mode for generating a sine wave with a first bit level accuracy and, when in the first mode, the overlap adjustment circuit adds no current.Type: ApplicationFiled: January 8, 2016Publication date: September 15, 2016Inventors: Mohammad Nizam KABIR, Brandt BRASWELL, Mariam HOSEINI
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Patent number: 9264062Abstract: A digital to analog converter including a current source for providing a master current, a first sub digital to analog converter coupled to the current source which generates a plurality of currents, and a second sub digital to analog converter coupled to at least one of the plurality of currents from the first sub digital to analog converter which generates a second plurality of currents. The digital to analog converter also includes an overlap adjustment circuit coupled with the second sub digital to analog converter which adds current. The digital to analog converter is configured to operate in a first mode for generating a sine wave with a first bit level accuracy and, when in the first mode, the overlap adjustment circuit adds no current.Type: GrantFiled: March 11, 2015Date of Patent: February 16, 2016Assignee: Freescale Semiconductor, Inc.Inventors: Mohammad Nizam Kabir, Brandt Braswell, Mariam Hoseini
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Patent number: 9252797Abstract: The embodiments described herein provide a digital-to-analog converter (DAC). The DAC implements a stepped return-to-zero (RZ) pulse scheme, where the DAC output includes the superposition of multiple time-offset RZ pulses. In one embodiment, the DAC includes a first switching element, a second switching element, a current source, and a current sink. The first switching element generates first RZ pulses, and the second switching element generates second RZ pulses, where the second RZ pulses are time-offset from the first RZ pulses. The first RZ pulses and second RZ pulses are combined to provide stepped RZ pulse output signal.Type: GrantFiled: October 31, 2014Date of Patent: February 2, 2016Assignee: FREESCALE SEMICONDUCTOR INC.Inventors: Mohammad Nizam Kabir, Mariam Hoseini, Brandt Braswell, Bruce M. Newman
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Patent number: 9148169Abstract: A quantizer for an analog to digital converter has an input for receiving an analog input signal. A detector senses a common mode voltage component of the input signal. A reference voltage source produces a plurality of reference voltages. A voltage source biases the reference voltage source in response to the sensed common mode voltage component. Therefore, the common mode voltage in the input signal establishes the common mode voltage of the reference voltage source. A plurality of comparators are connected to the reference voltage source, wherein each of the plurality of comparators compares the input signal to one of the plurality of reference voltages and produces a output bit denoting a result of the comparing.Type: GrantFiled: February 25, 2014Date of Patent: September 29, 2015Assignee: Freescale Semiconductor, Inc.Inventors: Mohammad Nizam Kabir, Brandt Braswell, Mariam Hoseini
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Publication number: 20150244393Abstract: A quantizer for an analog to digital converter has an input for receiving an analog input signal. A detector senses a common mode voltage component of the input signal. A reference voltage source produces a plurality of reference voltages. A voltage source biases the reference voltage source in response to the sensed common mode voltage component. Therefore, the common mode voltage in the input signal establishes the common mode voltage of the reference voltage source. A plurality of comparators are connected to the reference voltage source, wherein each of the plurality of comparators compares the input signal to one of the plurality of reference voltages and produces a output bit denoting a result of the comparing.Type: ApplicationFiled: February 25, 2014Publication date: August 27, 2015Applicant: FREESCALE SEMICONDUCTOR, INC.Inventors: Mohammad Nizam Kabir, Brandt Braswell, Mariam Hoseini