Patents by Inventor Iuri Mehr
Iuri Mehr 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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Publication number: 20240310419Abstract: A circuit includes a driver to provide a voltage at a node of a load and a first circuit to facilitate determining a load current at the node. The load is a capacitive load and the first circuit facilitates determining the load current by measuring a replica current and determining a capacitance of the load using values of the voltage and the replica current.Type: ApplicationFiled: March 15, 2023Publication date: September 19, 2024Inventors: Tom W. KWAN, Yue HU, Feng SU, Guowen WEI, Fang LIN, Iuri MEHR
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Patent number: 9756699Abstract: A sensor interface includes on-chip relaxation oscillator circuit and a PLL that operate cooperatively to generate a highly accurate clock signal on-chip using low-power components. A photodiode generates a current signal based on an optical signal that is representative of a sensor signal. An ADC that operates based on the highly accurate clock signal generates a digital signal based on the current signal generated by the photodiode, and a processor processed the digital signal to estimate sensor data within the sensor signal. Examples of characteristics that may be sensed can include environmental characteristics (e.g., temperature, humidity, barometric pressure, etc.) and/or biomedical characteristics (e.g., body temperature, heart rate, respiratory rate, blood pressure, etc.). If desired, an amplifier processes the photodiode-provided current signal before it is provided to the ADC. Also, one or more CDACs that generate feedback currents may be used to reduce noise sensitivity of the sensor interface.Type: GrantFiled: August 29, 2014Date of Patent: September 5, 2017Assignee: Avago Technologies General IP (Singapore) Pte. LtdInventors: Todd Lee Brooks, Xicheng Jiang, Iuri Mehr, David Joseph Stoops, Vinod Jayakumar, Min Gyu Kim, Hui Zheng, I-Ning Ku, Vinay Chandrasekhar, Yee Ling Cheung
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Publication number: 20160204702Abstract: A hysteretic switching regulator with low output ripple voltage is disclosed herein. A detector and controller is specifically used to adjust a parameter of the hysteretic switching regulator to compensate for changes in one or more of input voltage and desired output voltage to maintain the output ripple voltage within some desired range.Type: ApplicationFiled: March 6, 2015Publication date: July 14, 2016Applicant: Broadcom CorporationInventors: Aravind Kumar PADYANA, Iuri Mehr, Jay Ackerman, Mark Rutherford, Daniel Melendy, Eric Martin Hayes
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Patent number: 9344046Abstract: Methods, systems, and apparatuses for detecting and suppressing analog error in an output stage of a digital class-D amplifier are described. In embodiments, the digital class-D amplifier includes a PWM stage, an output stage, and a feedback circuit. The PWM stage receives the signal difference between an input digital signal and a feedback digital signal, generates a digital pulse-width modulated (PWM) signal based thereon, and provides the digital PWM signal as a first component of the digital feedback signal. The output stage receives the digital PWM signal and generates an analog output signal for driving a load responsive to the digital PWM signal. The feedback circuit combines an analog representation of the PWM signal and the analog output signal to generate a second component of the digital feedback signal.Type: GrantFiled: December 30, 2013Date of Patent: May 17, 2016Assignee: Broadcom CorporationInventors: Zhengyu Wang, Iuri Mehr, Jungwoo Song, Xicheng Jiang
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Patent number: 9136797Abstract: Techniques are described herein that adaptively suppress harmonic distortion in an amplifier utilizing negative gain. The amplifier includes a first amplifier stage and a second amplifier stage, which are coupled in parallel. The first amplifier stage has a positive gain. The second amplifier stage has a negative gain to suppress total harmonic distortion of a system that includes the amplifier. The amplifier further includes shunt-peaking circuitry coupled to the first amplifier stage and the second amplifier stage to increase a maximum operating frequency at which the amplifier is capable of operating.Type: GrantFiled: September 30, 2013Date of Patent: September 15, 2015Assignee: Broadcom CorporationInventors: Kuo-J Huang, Delong Cui, Jun Cao, Afshin Doctor Momtaz, Iuri Mehr, Ramon Alejandro Gomez
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Patent number: 9124227Abstract: Systems and methods are disclosed to provide automatic power control for a driver circuit. Embodiments disclosed herein enable a driver circuit to automatically decrease the gain of amplified input signals when output power exceeds a threshold. Further, embodiments disclosed herein enable a driver circuit to automatically increase the gain of amplified input signals when battery supply voltage drops to avoid unwanted output signal distortion. By using reference signals for battery power and amplified signal input, the amplifiers of the driver circuit can be automatically adjusted until an equilibrium is reached.Type: GrantFiled: September 18, 2012Date of Patent: September 1, 2015Assignee: Broadcom CorporationInventors: Minsheng Wang, Iuri Mehr, Jungwoo Song, Vinay Chandrasekhar
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Publication number: 20150180430Abstract: Methods, systems, and apparatuses for detecting and suppressing analog error in an output stage of a digital class-D amplifier are described. In embodiments, the digital class-D amplifier includes a PWM stage, an output stage, and a feedback circuit. The PWM stage receives the signal difference between an input digital signal and a feedback digital signal, generates a digital pulse-width modulated (PWM) signal based thereon, and provides the digital PWM signal as a first component of the digital feedback signal. The output stage receives the digital PWM signal and generates an analog output signal for driving a load responsive to the digital PWM signal. The feedback circuit combines an analog representation of the PWM signal and the analog output signal to generate a second component of the digital feedback signal.Type: ApplicationFiled: December 30, 2013Publication date: June 25, 2015Applicant: Broadcom CorporationInventors: Zhengyu Wang, Iuri Mehr, Jungwoo Song, Xicheng Jiang
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Publication number: 20150066438Abstract: A sensor interface includes on-chip relaxation oscillator circuit and a PLL that operate cooperatively to generate a highly accurate clock signal on-chip using low-power components. A photodiode generates a current signal based on an optical signal that is representative of a sensor signal. An ADC that operates based on the highly accurate clock signal generates a digital signal based on the current signal generated by the photodiode, and a processor processed the digital signal to estimate sensor data within the sensor signal. Examples of characteristics that may be sensed can include environmental characteristics (e.g., temperature, humidity, barometric pressure, etc.) and/or biomedical characteristics (e.g., body temperature, heart rate, respiratory rate, blood pressure, etc.). In desired, an amplifier processes the photodiode-provided current signal before it is provided to the ADC. Also, one or more CDACs that generate feedback currents may be used to reduce noise sensitivity of the sensor interface.Type: ApplicationFiled: August 29, 2014Publication date: March 5, 2015Applicant: BROADCOM CORPORATIONInventors: Todd Lee Brooks, Xicheng Jiang, Iuri Mehr, David Joseph Stoops, Vinod Jayakumar, Min Gyu Kim, Hui Zheng, I-Ning Ku, Vinay Chandrasekhar, Yee Ling Cheung
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Publication number: 20150008982Abstract: Techniques are described herein that adaptively suppress harmonic distortion in an amplifier utilizing negative gain. The amplifier includes a first amplifier stage and a second amplifier stage, which are coupled in parallel. The first amplifier stage has a positive gain. The second amplifier stage has a negative gain to suppress total harmonic distortion of a system that includes the amplifier. The amplifier further includes shunt-peaking circuitry coupled to the first amplifier stage and the second amplifier stage to increase a maximum operating frequency at which the amplifier is capable of operating.Type: ApplicationFiled: September 30, 2013Publication date: January 8, 2015Applicant: Broadcom CorporationInventors: Kuo-J Huang, Delong Cui, Jun Cao, Afshin Doctor Momtaz, Iuri Mehr, Ramon Alejandro Gomez
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Publication number: 20140079246Abstract: Systems and methods are disclosed to provide automatic power control for a driver circuit. Embodiments disclosed herein enable a driver circuit to automatically decrease the gain of amplified input signals when output power exceeds a threshold. Further, embodiments disclosed herein enable a driver circuit to automatically increase the gain of amplified input signals when battery supply voltage drops to avoid unwanted output signal distortion. By using reference signals for battery power and amplified signal input, the amplifiers of the driver circuit can be automatically adjusted until an equilibrium is reached.Type: ApplicationFiled: September 18, 2012Publication date: March 20, 2014Applicant: Broadcom CorporationInventors: Minsheng Wang, Iuri Mehr, Jungwoo Song, Vinay Chandrasekhar
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Patent number: 8482347Abstract: Disclosed is an amplifier designed to substantially reduce an ON/OFF transient. The amplifier comprises a drive block that includes a pre-driver and an output stage. The amplifier also comprises a bypass circuit that is coupled to an output of the pre-driver. The bypass circuit of the amplifier is selectively activated to reduce the ON/OFF transient. The bypass circuit may comprise an auxiliary output stage that can be coupled to provide selective activation. The amplifier may also be configured to provide multi-point offset compensation. Also disclosed is a related method. The amplifier and the related method may be incorporated into an audio amplifier used in a cellular telephone or other mobile audio device.Type: GrantFiled: January 7, 2011Date of Patent: July 9, 2013Assignee: Broadcom CorporationInventors: Iuri Mehr, Sherif Galal, Todd L. Brooks
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Publication number: 20120146719Abstract: Disclosed is an amplifier designed to substantially reduce an ON/OFF transient. The amplifier comprises a drive block that includes a pre-driver and an output stage. The amplifier also comprises a bypass circuit that is coupled to an output of the pre-driver. The bypass circuit of the amplifier is selectively activated to reduce the ON/OFF transient. The bypass circuit may comprise an auxiliary output stage that can be coupled to provide selective activation. The amplifier may also be configured to provide multi-point offset compensation. Also disclosed is a related method. The amplifier and the related method may be incorporated into an audio amplifier used in a cellular telephone or other mobile audio device.Type: ApplicationFiled: January 7, 2011Publication date: June 14, 2012Applicant: BROADCOM CORPORATIONInventors: Iuri Mehr, Sherif Galal, Todd L. Brooks
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Patent number: 7577414Abstract: In one aspect, an automatic gain control (AGC) for applying a variable gain to a broadband signal is provided. The AGC comprises a variable gain amplifier adapted to receive the broadband signal as an input, the variable gain amplifier configured to apply a variable gain to the broadband signal based on a value of a gain signal to provide an amplified broadband signal, and a controller to provide the gain signal to the variable gain amplifier, the controller adapted to determine the value of the gain signal based on at least one characteristic of the amplified broadband signal. In a further aspect, the one or more characteristic is a power characteristic of the broadband signal that facilitates control of the broadband signal within a desired power range.Type: GrantFiled: January 27, 2005Date of Patent: August 18, 2009Assignee: Analog Devices, Inc.Inventor: Iuri Mehr
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Patent number: 7394857Abstract: A versatile, programmable, low-cost transmit line driver is provided. The line driver includes a digital-to-analog converter that receives a digital input and provides an analog output. The line driver is reconfigurable between the voltage mode of operation.Type: GrantFiled: October 31, 2003Date of Patent: July 1, 2008Assignee: Analog Devices, Inc.Inventors: Prabir C. Maulik, Paul M. Hendriks, Iuri Mehr
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Patent number: 7342614Abstract: Methods and apparatus for tuning are disclosed. One embodiment of the invention is directed to a tuner formed on a substrate. The tuner comprises a first die that receives an analog input signal and processes the analog input signal using analog processing circuitry to form analog output signals, and a second die that receives the analog output signals, converts the analog output signals to digital signals, and processes the digital signals to form output signals. Another embodiment of the invention is directed to a multi-chip module comprising a tuner adapted to process television signals of a plurality of types and of a plurality of standards to form output signals.Type: GrantFiled: May 20, 2004Date of Patent: March 11, 2008Assignee: Analog Devices, Inc.Inventors: Iuri Mehr, Sergei Nesterenko, Richard Schreier, David Robertson
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Patent number: 7091792Abstract: Methods and apparatus for amplifying a tuner input signal are disclosed. One embodiment of the invention is directed to a tuner amplifier system comprising a tuner amplifier input that receives a tuner amplifier input signal and a first amplifier comprising an input and an output. The input of the first amplifier is coupled to the tuner amplifier input. The system further comprises a second amplifier comprising an input and an output, the input of the second amplifier being coupled to the tuner amplifier input, and a switch adapted to couple one of the first amplifier output and the second amplifier output to an output of the tuner amplifier. Another embodiment of the invention is directed to a method of amplifying a tuner input signal. The method comprises acts of detecting a power of the tuner input signal, selecting a tuner amplifier to amplify the tuner input signal based on the power of the tuner input signal, and amplifying the tuner input signal using the selected amplifier.Type: GrantFiled: May 20, 2004Date of Patent: August 15, 2006Assignee: Analog Devices, Inc.Inventor: Iuri Mehr
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Publication number: 20060166633Abstract: In one aspect, an automatic gain control (AGC) for applying a variable gain to a broadband signal is provided. The AGC comprises a variable gain amplifier adapted to receive the broadband signal as an input, the variable gain amplifier configured to apply a variable gain to the broadband signal based on a value of a gain signal to provide an amplified broadband signal, and a controller to provide the gain signal to the variable gain amplifier, the controller adapted to determine the value of the gain signal based on at least one characteristic of the amplified broadband signal. In a further aspect, the one or more characteristic is a power characteristic of the broadband signal that facilitates control of the broadband signal within a desired power range.Type: ApplicationFiled: January 27, 2005Publication date: July 27, 2006Applicant: Analog Devices, Inc.Inventor: Iuri Mehr
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Publication number: 20050258904Abstract: Methods and apparatus for amplifying a tuner input signal are disclosed. One embodiment of the invention is directed to a tuner amplifier system comprising a tuner amplifier input that receives a tuner amplifier input signal and a first amplifier comprising an input and an output. The input of the first amplifier is coupled to the tuner amplifier input. The system further comprises a second amplifier comprising an input and an output, the input of the second amplifier being coupled to the tuner amplifier input, and a switch adapted to couple one of the first amplifier output and the second amplifier output to an output of the tuner amplifier. Another embodiment of the invention is directed to a method of amplifying a tuner input signal. The method comprises acts of detecting a power of the tuner input signal, selecting a tuner amplifier to amplify the tuner input signal based on the power of the tuner input signal, and amplifying the tuner input signal using the selected amplifier.Type: ApplicationFiled: May 20, 2004Publication date: November 24, 2005Applicant: Analog Devices, Inc.Inventor: Iuri Mehr
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Publication number: 20050259186Abstract: Methods and apparatus for tuning are disclosed. One embodiment of the invention is directed to a tuner formed on a substrate. The tuner comprises a first die that receives an analog input signal and processes the analog input signal using analog processing circuitry to form analog output signals, and a second die that receives the analog output signals, converts the analog output signals to digital signals, and processes the digital signals to form output signals. Another embodiment of the invention is directed to a multi-chip module comprising a tuner adapted to process television signals of a plurality of types and of a plurality of standards to form output signals.Type: ApplicationFiled: May 20, 2004Publication date: November 24, 2005Applicant: Analog Devices, Inc.Inventors: Iuri Mehr, Sergei Nesterenko, Richard Schreier, David Robertson
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Publication number: 20050094736Abstract: A versatile, programmable, low-cost transmit line driver is provided. The line driver includes a digital-to-analog converter that receives a digital input and provides an analog output. The line driver is reconfigurable between the voltage mode of operation.Type: ApplicationFiled: October 31, 2003Publication date: May 5, 2005Inventors: Prabir Maulik, Paul Hendriks, Iuri Mehr