Patents by Inventor Edward Youssoufian
Edward Youssoufian 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: 10819302Abstract: A communication system including an analog front end and an automatic gain controller. The analog front end includes at least one amplifier for amplifying a received analog signal and an analog to digital converter that converts the analog signal to digital samples. The automatic gain controller includes comparator circuitry, counter circuitry, and a gain controller. The comparator circuitry compares each of the digital samples with an upper threshold and a lower threshold. The counter circuitry counts a high count number of the digital samples having magnitudes that are greater than the upper threshold during each count window and counts a low count number of the digital samples having magnitudes that are less than the lower threshold during the count window. The gain controller adjusts a gain of the at least one amplifier by an amount based on the high count number and the low count number.Type: GrantFiled: August 15, 2019Date of Patent: October 27, 2020Assignee: NXP B.V.Inventors: Radha Srinivasan, Brima Babatunde Ibrahim, Edward Youssoufian
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Patent number: 9673783Abstract: A device includes a controller and an adaptive continuous-time filter that includes a control input and a first array of elements. The controller generates a digital word responsive to a time constant and compares a select bit of the digital word to a corresponding reference word to generate a control bit. The controller includes a duplicate array of elements, and applies the control bit to an adjustable element of the duplicate array of elements to modify the time constant. The controller provides the output word to the control input of the adaptive continuous-time filter to generate a filter response that accounts for effects of semiconductor process variation in the first array of elements.Type: GrantFiled: December 7, 2015Date of Patent: June 6, 2017Assignee: Skyworks Solutions, Inc.Inventors: Edward Youssoufian, David L. Yates, Aly M. Ismail, Geoffrey Hatcher
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Publication number: 20160087605Abstract: A device includes a controller and an adaptive continuous-time filter that includes a control input and a first array of elements. The controller generates a digital word responsive to a time constant and compares a select bit of the digital word to a corresponding reference word to generate a control bit. The controller includes a duplicate array of elements, and applies the control bit to an adjustable element of the duplicate array of elements to modify the time constant. The controller provides the output word to the control input of the adaptive continuous-time filter to generate a filter response that accounts for effects of semiconductor process variation in the first array of elements.Type: ApplicationFiled: December 7, 2015Publication date: March 24, 2016Inventors: Edward Youssoufian, David L. Yates, Aly M. Ismail, Geoffrey Hatcher
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Patent number: 9236851Abstract: A direct conversion radio-frequency (RF) receiver includes a controller and an adaptive continuous-time filter. The adaptive continuous-time filter receives a multiple-bit control signal generated by the controller to adjust a characteristic of the continuous-time filter. The controller generates the multiple-bit control signal in response to process variation in the semi-conductor material used to implement the controller and the adaptive continuous-time filter. A method for tuning an adaptive continuous-time filter comprises determining a RC time constant, converting the RC time constant to a digital word, comparing a select bit of the digital word to a respective bit of a predetermined reference word to generate a control bit, applying the control bit to an adjustable element to modify the RC time constant, repeating the determining, converting, comparing and applying steps until the control bits generate an output word and providing the output word to the adaptive continuous-time filter.Type: GrantFiled: February 6, 2012Date of Patent: January 12, 2016Assignee: Skyworks Solutions, Inc.Inventors: Edward Youssoufian, Aly M. Ismail, Geoffrey Hatcher
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Patent number: 8731504Abstract: A method of filtering and a RF filtering circuit comprising a LO adapted to generate in-phase and quadrature LO signals; a quadrature passive mixer operatively connected to the LO; a filtering impedance operatively connected to the quadrature passive mixer, wherein the voltage at an input node of the quadrature passive mixer comprises the voltage across the filtering impedance up-converted to a frequency of a LO signal received by the quadrature passive mixer. Preferably, the voltage across the filtering impedance comprises a frequency of an input signal of the quadrature passive mixer down-converted by a frequency of the in-phase and quadrature LO signals and filtered by the filtering impedance.Type: GrantFiled: September 16, 2010Date of Patent: May 20, 2014Assignee: Newport Media, Inc.Inventors: Aly Ismail, Edward Youssoufian, Hassan Elwan, Frank Carr
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Publication number: 20120133426Abstract: A direct conversion radio-frequency (RF) receiver includes a controller and an adaptive continuous-time filter. The adaptive continuous-time filter receives a multiple-bit control signal generated by the controller to adjust a characteristic of the continuous-time filter. The controller generates the multiple-bit control signal in response to process variation in the semi-conductor material used to implement the controller and the adaptive continuous-time filter. A method for tuning an adaptive continuous-time filter comprises determining a RC time constant, converting the RC time constant to a digital word, comparing a select bit of the digital word to a respective bit of a predetermined reference word to generate a control bit, applying the control bit to an adjustable element to modify the RC time constant, repeating the determining, converting, comparing and applying steps until the control bits generate an output word and providing the output word to the adaptive continuous-time filter.Type: ApplicationFiled: February 6, 2012Publication date: May 31, 2012Applicant: Skyworks Solutions, Inc.Inventors: Edward Youssoufian, David Yates, Aly M. Ismail, Geoffrey Hatcher
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Patent number: 8169546Abstract: A technique for providing stable tracking performance to an AGC loop circuit comprises amplifying a wideband radio frequency signal; detecting signals and blockers adjacent to the radio frequency signal; lowering a gain of the radio frequency signal; mixing a local oscillator signal with the radio frequency signal; shifting a frequency of the radio frequency signal from a radio frequency to an intermediate frequency; continuously varying a gain of the intermediate frequency signal; converting the intermediate frequency signal into a digital output signal; comparing the digital output signal with predefined thresholds comprising an upper threshold and a lower threshold; switching a post mixer amplifier (PMA) to a high gain state when an input of a variable gain amplifier (VGA) is greater than the upper threshold, and switching the PMA to a low gain state when an input of the VGA is lower than the lower threshold.Type: GrantFiled: February 19, 2008Date of Patent: May 1, 2012Assignee: Newport Media, Inc.Inventors: Xiaoyu Fu, Jun Ma, Waleed M. Younis, Nabil Yousef, Janakan Sivasubramaniam, Edward Youssoufian
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Patent number: 8135365Abstract: A direct conversion radio-frequency (RF) receiver includes a controller and an adaptive continuous-time filter. The adaptive continuous-time filter receives a multiple-bit control signal generated by the controller to adjust a characteristic of the continuous-time filter. The controller generates the multiple-bit control signal in response to process variation in the semiconductor material used to implement the controller and the adaptive continuous-time filter. A method for tuning an adaptive continuous-time filter comprises determining a RC time constant, converting the RC time constant to a digital word, comparing a select bit of the digital word to a respective bit of a predetermined reference word to generate a control bit, applying the control bit to an adjustable element to modify the RC time constant, repeating the determining, converting, comparing and applying steps until the control bits generate an output word and providing the output word to the adaptive continuous-time filter.Type: GrantFiled: December 3, 2010Date of Patent: March 13, 2012Assignee: Skyworks Solutions, Inc.Inventors: Edward Youssoufian, David Yates, Aly M. Ismail, Geoffrey Hatcher
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Patent number: 8041327Abstract: A radio frequency (RF) mixing circuit including a quadrature mixer that receives non-overlapping in-phase and quadrature local oscillator (LO) signals, and a plurality of low noise amplifiers (LNAs) operatively connected to the quadrature mixer, the plurality of LNAs presenting an input impedance at a baseband. A first voltage at an input node of the quadrature mixer is equal to a second voltage across the impedance up-converted to a frequency of a LO signal received by the quadrature mixer. The second voltage across the LNA input impedance includes a frequency of an input signal of the quadrature mixer down-converted by a frequency of the in-phase and quadrature LO signals and filtered by the impedance. The quadrature mixer down-converts an input signal by a frequency of the in-phase and quadrature LO signals and transfers the noise cancelled impedance to a RF to achieve a noise cancelled match.Type: GrantFiled: June 11, 2008Date of Patent: October 18, 2011Assignee: Newport Media, Inc.Inventor: Edward Youssoufian
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Patent number: 8005449Abstract: A Received Signal Strength Indicator (RSSI) circuit includes a subsampling circuit that processes an input signal comprising a sampling frequency, fs, wherein the subsampling circuit subsamples the input signal, wherein the input signal is subsampled to concentrate a power in a narrow bandwidth; an analog-to-digital converter (ADC) operatively connected to the subsampling circuit, wherein the ADC digitizes the subsampled signal; and a baseband detector operatively connected to the ADC, wherein the baseband detector detects a power from the digitized subsampled signal and creates an output signal. The subsampling circuit and the ADC may operate as a single subsampling ADC. The RSSI circuit may further comprise ignoring higher order aliases at a multiple of the sampling frequency if the baseband detector is clocked at the sampling frequency.Type: GrantFiled: June 11, 2008Date of Patent: August 23, 2011Assignee: Newport Media, Inc.Inventors: Edward Youssoufian, Amr Fahim
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Patent number: 7973861Abstract: A tuner for use in mobile television devices comprises at least one RF front end component comprising a LNA adapted to amplify mobile television signals; a PLL circuit to generate signals; and a pair of mixers to receive the signals from the LNA and the PLL circuit and downconvert the signals; an analog baseband component connected to the RF front end component, wherein the analog baseband component comprises I and Q channel signal paths each comprising a tunable high order impedance filter; at least one signal amplification stage; and a signal filter stage connected to the signal amplification stage, wherein the analog baseband component further comprises a plurality of switches operatively connected to the I and Q channel signal paths, and wherein the plurality of switches are selectively opened and closed in multiple configurations in order to allow the tuner to receive mobile TV signals for all mobile TV standards.Type: GrantFiled: April 19, 2007Date of Patent: July 5, 2011Assignee: Newport Media, Inc.Inventors: Mohy Abdelgany, Frank Carr, Hassan Elwan, Amr Fahim, Edward Youssoufian
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Publication number: 20110075777Abstract: A direct conversion radio-frequency (RF) receiver includes a controller and an adaptive continuous-time filter. The adaptive continuous-time filter receives a multiple-bit control signal generated by the controller to adjust a characteristic of the continuous-time filter. The controller generates the multiple-bit control signal in response to process variation in the semiconductor material used to implement the controller and the adaptive continuous-time filter. A method for tuning an adaptive continuous-time filter comprises determining a RC time constant, converting the RC time constant to a digital word, comparing a select bit of the digital word to a respective bit of a predetermined reference word to generate a control bit, applying the control bit to an adjustable element to modify the RC time constant, repeating the determining, converting, comparing and applying steps until the control bits generate an output word and providing the output word to the adaptive continuous-time filter.Type: ApplicationFiled: December 3, 2010Publication date: March 31, 2011Applicant: Skyworks Solutions, Inc.Inventors: Edward Youssoufian, David Yates, Aly M. Ismail, Geoffrey Hatcher
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Patent number: 7869780Abstract: A direct conversion radio-frequency (RF) receiver includes a controller and an adaptive continuous-time filter. The adaptive continuous-time filter receives a multiple-bit control signal generated by the controller to adjust a characteristic of the continuous-time filter. The controller generates the multiple-bit control signal in response to process variation in the semiconductor material used to implement the controller and the adaptive continuous-time filter. A method for tuning an adaptive continuous-time filter comprises determining a RC time constant, converting the RC time constant to a digital word, comparing a select bit of the digital word to a respective bit of a predetermined reference word to generate a control bit, applying the control bit to an adjustable element to modify the RC time constant, repeating the determining, converting, comparing and applying steps until the control bits generate an output word and providing the output word to the adaptive continuous-time filter.Type: GrantFiled: April 19, 2007Date of Patent: January 11, 2011Assignee: Skyworks Solutions, Inc.Inventors: Edward Youssoufian, David Yates, Aly M. Ismail, Geoffrey Hatcher
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Publication number: 20110003573Abstract: A method of filtering and a RF filtering circuit comprising a LO adapted to generate in-phase and quadrature LO signals; a quadrature passive mixer operatively connected to the LO; a filtering impedance operatively connected to the quadrature passive mixer, wherein the voltage at an input node of the quadrature passive mixer comprises the voltage across the filtering impedance up-converted to a frequency of a LO signal received by the quadrature passive mixer. Preferably, the voltage across the filtering impedance comprises a frequency of an input signal of the quadrature passive mixer down-converted by a frequency of the in-phase and quadrature LO signals and filtered by the filtering impedance.Type: ApplicationFiled: September 16, 2010Publication date: January 6, 2011Applicant: NEWPORT MEDIA, INC.Inventors: Aly Ismail, Edward Youssoufian, Hassan Elwan, Frank Carr
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Patent number: 7706496Abstract: According to one exemplary embodiment, a digital phase detector includes a phase/frequency detector, where the phase/frequency detector is configured to receive a reference signal and a divided oscillator feedback signal and output a first pulse-width modulated signal and a second pulse-width modulated signal. The digital phase detector also includes a first time-to-digital converter, where the first time-to-digital converter is coupled to the phase/frequency detector. The first time-to-digital converter is configured to receive and convert the first pulse-width modulated signal to a first digital number. The digital phase detector further includes a second time-to-digital converter coupled to the phase/frequency detector and configured to receive and convert the second pulse-width modulated signal to a second digital number.Type: GrantFiled: January 31, 2005Date of Patent: April 27, 2010Assignee: Skyworks Solutions, Inc.Inventor: Edward Youssoufian
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Patent number: 7697644Abstract: A system and method for performing stepped automatic gain control (AGC) for orthogonal-frequency-division-multiplexing (OFDM) applications comprises a radio frequency (RF) tuner and an OFDM demodulator operatively connected to the RF tuner, the OFDM demodulator comprising logic circuitry adapted to (i) detect OFDM symbols from a stream of data; (ii) detect boundaries of the OFDM symbols; (iii) detect a cyclic prefix duration of data values associated with the OFDM symbols; and (iv) provide a feedback to the RF tuner of the information pertaining to the boundaries of the OFDM symbols and the cyclic prefix duration.Type: GrantFiled: November 30, 2006Date of Patent: April 13, 2010Assignee: Newport Media, Inc.Inventors: Nabil Yousef, Aly Ismail, Edward Youssoufian
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Patent number: 7676207Abstract: Digital autonomous AGC for a DVB-H receiver comprises detecting a plurality of RF signals entering a LNA in the DVB-H receiver; detecting a RF transmitter blocker signal occurring at the LNA; and differentiating between a desired RF signal and an undesired RF transmitter blocker signal by varying a differential gain of current through the LNA. A RF servo loop is used for detecting the RF transmitter blocker signal. Logic circuitry of the RF servo loop is integrated with a baseband AGC loop to step control the differential gain of current through the LNA. A RF wideband detector is used for detecting the plurality of RF signals entering the LNA; and sending a voltage output corresponding to voltage levels of the RF signals to a plurality of comparators, wherein each of the plurality of comparators are set at a different programmable voltage threshold level compared with one another.Type: GrantFiled: March 8, 2006Date of Patent: March 9, 2010Assignee: Newport Media, Inc.Inventors: Aly Ismail, Janakan Sivasubramaniam, Edward Youssoufian, Nabil Yousef, Frank Carr
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Publication number: 20090311985Abstract: A Received Signal Strength Indicator (RSSI) circuit includes a subsampling circuit that processes an input signal comprising a sampling frequency, fs, wherein the subsampling circuit subsamples the input signal, wherein the input signal is subsampled to concentrate a power in a narrow bandwidth; an analog-to-digital converter (ADC) operatively connected to the subsampling circuit, wherein the ADC digitizes the subsampled signal; and a baseband detector operatively connected to the ADC, wherein the baseband detector detects a power from the digitized subsampled signal and creates an output signal. The subsampling circuit and the ADC may operate as a single subsampling ADC. The RSSI circuit may further comprise ignoring higher order aliases at a multiple of the sampling frequency if the baseband detector is clocked at the sampling frequency.Type: ApplicationFiled: June 11, 2008Publication date: December 17, 2009Applicant: NEWPORT MEDIA, INC.Inventors: Edward Youssoufian, Amr Fahim
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Publication number: 20090302944Abstract: A fully differential amplifier that amplifies and filters a signal band of a communications channel, the signal band including a desired signal and at least one blocker signal of an adjacent communications channel, the fully differential amplifier includes a fully differential operational amplifier (op-amp) with a common mode feedback, the fully differential operational amplifier amplifying the desired signal, a variable input resistance connected to an input of the fully differential op-amp, and an asymmetric floating frequency dependent negative resistance (AFFDNR) filter connected to the fully differential op-amp between the input and an output of the fully differential op-amp. A plurality of inputs of the fully differential op-amp may be virtually grounded to reduce swings in a voltage. The AFFDNR filter filters the at least one blocker signal and includes a plurality of resistors that implement a high order filtering of the at least one blocker signal.Type: ApplicationFiled: June 4, 2008Publication date: December 10, 2009Applicant: Newport Media, Inc.Inventors: Ahmet Tekin, Hassan Elwan, Edward Youssoufian
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Patent number: RE44551Abstract: A tuner for use in mobile television devices comprises at least one RF front end component comprising a LNA adapted to amplify mobile television signals; a PLL circuit to generate signals; and a pair of mixers to receive the signals from the LNA and the PLL circuit and downconvert the signals; an analog baseband component connected to the RF front end component, wherein the analog baseband component comprises I and Q channel signal paths each comprising a tunable high order impedance filter; at least one signal amplification stage; and a signal filter stage connected to the signal amplification stage, wherein the analog baseband component further comprises a plurality of switches operatively connected to the I and Q channel signal paths, and wherein the plurality of switches are selectively opened and closed in multiple configurations in order to allow the tuner to receive mobile TV signals for all mobile TV standards.Type: GrantFiled: October 4, 2012Date of Patent: October 22, 2013Assignee: Newport Media, Inc.Inventors: Mohy Abdelgany, Frank Carr, Hassan Elwan, Amr Fahim, Edward Youssoufian