Patents by Inventor Mahdi Bagheri
Mahdi Bagheri 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).
-
Patent number: 10784891Abstract: Various embodiments relate to delta-sigma loop filters with input feedforward. A delta-sigma loop filter may include a first integrator and a quantizer having an input coupled to an output of the first integrator. The delta-sigma loop filter may further include a first summing node having an output coupled to an input of the first integrator. Further, the delta-sigma loop filter may include a feedforward path from an input of the delta-sigma loop filter to a first input of the first summing node. The delta-sigma loop filter may also include a first feedback path from an output of the quantizer to a second input of the first summing node.Type: GrantFiled: October 2, 2018Date of Patent: September 22, 2020Assignee: Microchip Technology IncorporatedInventors: Omid Rajaee, Rahim Bagheri, Saeed Pourbagheri, Mohammad Mehrjoo, Mahdi Bagheri, Edwin Chiem, Jun Wang
-
Patent number: 10756751Abstract: Various embodiments relate to an analog-to-digital converter (ADC). The ADC may include a first channel including a first delta-sigma loop filter and a second channel including a second delta-sigma loop filter. Each of the first delta-sigma loop filter and the second delta-sigma loop filter may include a first integrator and a quantizer having an input coupled to an output of the first integrator. Each of the first delta-sigma loop filter and the second delta-sigma loop filter may also include a first summing node having an output coupled to an input of the first integrator, and a feedforward path from an input of the delta sigma loop filter to a first input of the first summing node. Further, each of the first delta-sigma loop filter and the second delta-sigma loop filter may include a first feedback path from an output of the quantizer to a second input of the first summing node.Type: GrantFiled: October 31, 2018Date of Patent: August 25, 2020Assignee: Microchip Technology IncorporatedInventors: Omid Rajaee, Rahim Bagheri, Saeed Pourbagheri, Mohammad Mehrjoo, Mahdi Bagheri, Edwin Chiem, Jun Wang
-
Publication number: 20190348996Abstract: Various embodiments relate to an analog-to-digital converter (ADC). The ADC may include a first channel including a first delta-sigma loop filter and a second channel including a second delta-sigma loop filter. Each of the first delta-sigma loop filter and the second delta-sigma loop filter may include a first integrator and a quantizer having an input coupled to an output of the first integrator. Each of the first delta-sigma loop filter and the second delta-sigma loop filter may also include a first summing node having an output coupled to an input of the first integrator, and a feedforward path from an input of the delta-signal loop filter to a first input of the first summing node. Further, each of the first delta-sigma loop filter and the second delta-sigma loop filter may include a first feedback path from an output of the quantizer to a second input of the first summing node.Type: ApplicationFiled: October 31, 2018Publication date: November 14, 2019Inventors: Omid Rajaee, Rahim Bagheri, Saeed Pourbagheri, Mohammad Mehrjoo, Mahdi Bagheri, Edwin Chiem, Jun Wang
-
Publication number: 20190348995Abstract: Various embodiments relate to delta-sigma loop filters with input feedforward. A delta-sigma loop filter may include a first integrator and a quantizer having an input coupled to an output of the first integrator. The delta-sigma loop filter may further include a first summing node having an output coupled to an input of the first integrator. Further, the delta-sigma loop filter may include a feedforward path from an input of the delta-sigma loop filter to a first input of the first summing node. The delta-sigma loop filter may also include a first feedback path from an output of the quantizer to a second input of the first summing node.Type: ApplicationFiled: October 2, 2018Publication date: November 14, 2019Inventors: Omid Rajaee, Rahim Bagheri, Saeed Pourbagheri, Mohammad Mehrjoo, Mahdi Bagheri, Edwin Chiem, Jun Wang
-
Patent number: 8179167Abstract: Embodiments of the present invention include methods for wide bandwidth synthesizer circuits and methods. In one embodiment, the present invention includes a frequency synthesizer comprising a multiplexer and a band group selector. The multiplexer is coupled to receive a plurality of sinusoidal signals. Each sinusoidal signal has a unique frequency. The band group selector selects between a plurality of band groups. The band group selector is coupled to receive a first signal from the multiplexer. The multiplexer multiplexes between the plurality of sinusoidal signals and provides the first signal. The band group selector includes a band mixer. The band mixer mixes the first signal with a band signal having a band frequency. The band signal corresponds to a band group selected from the plurality of band groups. The band group selector provides a transmitter mixer signal and a receiver mixer signal.Type: GrantFiled: March 10, 2009Date of Patent: May 15, 2012Assignee: WiLinx CorporationInventors: Mahdi Bagheri, Ali Karimi-Sanjaaani, Edris Rostami, Masoud Djafari, Mohammad E. Heidari, Rahim Bagheri
-
Publication number: 20110267148Abstract: A Multiphase VCO Circuits and Methods with Wide Tuning Range have been disclosed.Type: ApplicationFiled: April 27, 2011Publication date: November 3, 2011Applicant: WiLinx CorporationInventors: Mahdi Bagheri, Rahim Bagheri
-
Publication number: 20100233979Abstract: Embodiments of the present invention include methods for wide bandwidth synthesizer circuits and methods. In one embodiment, the present invention includes a frequency synthesizer comprising a multiplexer and a band group selector. The multiplexer is coupled to receive a plurality of sinusoidal signals. Each sinusoidal signal has a unique frequency. The band group selector selects between a plurality of band groups. The band group selector is coupled to receive a first signal from the multiplexer. The multiplexer multiplexes between the plurality of sinusoidal signals and provides the first signal. The band group selector includes a band mixer. The band mixer mixes the first signal with a band signal having a band frequency. The band signal corresponds to a band group selected from the plurality of band groups. The band group selector provides a transmitter mixer signal and a receiver mixer signal.Type: ApplicationFiled: March 10, 2009Publication date: September 16, 2010Applicant: WiLinx CorporationInventors: Mahdi Bagheri, Ali Karimi-Sanjaaani, Edris Rostami, Masoud Djafari, Mohammad E. Heidari, Rahim Bagheri
-
Patent number: 7764103Abstract: In one embodiment, the present invention includes an electronic circuit comprising a first stage having a first differential inductive element and a second differential inductive element, and a second stage coupled to an output of the first stage, the second stage having a first differential inductive element and a second differential inductive element, wherein the first and second differential inductive elements of the first stage couple magnetically to generate a first phase error, wherein the first and second differential inductive elements of the second stage couple magnetically to generate a second phase error, and wherein the second phase error cancels the first phase error.Type: GrantFiled: August 25, 2008Date of Patent: July 27, 2010Assignee: WiLinx CorporationInventors: Mahdi Bagheri, Kaveh Moazzami, Filipp A. Baron, Mohammad E. Heidari, Rahim Bagheri
-
Publication number: 20100045404Abstract: In one embodiment, the present invention includes an electronic circuit comprising a first stage having a first differential inductive element and a second differential inductive element, and a second stage coupled to an output of the first stage, the second stage having a first differential inductive element and a second differential inductive element, wherein the first and second differential inductive elements of the first stage couple magnetically to generate a first phase error, wherein the first and second differential inductive elements of the second stage couple magnetically to generate a second phase error, and wherein the second phase error cancels the first phase error.Type: ApplicationFiled: August 25, 2008Publication date: February 25, 2010Applicant: WiLinx CorporationInventors: Mahdi Bagheri, Kaveh Moazzami, Filipp A. Baron, Mohammad E. Heidari, Rahim Bagheri
-
Publication number: 20100044093Abstract: In one embodiment the present invention includes an electrical arrangement comprising conductive elements such as electrical traces. The conductive elements carry differential signals. The conductive elements extend horizontally and have alternating sections around one or more center lines. Ground lines may be included the further enhance signal integrity. In one embodiment, magnetic field cancellation may be achieved by providing an offset between pairs of alternating differential elements.Type: ApplicationFiled: August 25, 2008Publication date: February 25, 2010Applicant: WiLinx CorporationInventors: Kaveh Moazzami, Mahdi Bagheri, Edris Rostami, Rahim Bagheri
-
Patent number: 7633341Abstract: Embodiments of the present invention include circuits and methods with wide bandwidths. In one embodiment, parasitic capacitances of the output of a first stage and the input of a second stage are included in a network. The output of the first stage is coupled to the input of the network, and the input of the second stage is coupled to an intermediate node of the network. In one embodiment, the parasitic capacitance of the second stage is the largest capacitance in the network. In another embodiment, passive networks are coupled to the outputs of a stage, and one or more current injection circuits may be used to extend the bandwidth of the circuit.Type: GrantFiled: October 20, 2006Date of Patent: December 15, 2009Assignee: Wilinx CorporationInventors: Mahdi Bagheri, Rahim Bagheri, Ahmad Mirzaei, Abbas Komijani, Edris Rostami, Masoud Djafari
-
Publication number: 20080317165Abstract: In one embodiment the present invention includes a method of calibrating the frequency response of a transmitter comprising generating a plurality of calibration tones across a frequency range, coupling the plurality of calibration tones to an input of said transmitter, detecting the plurality of calibration tones at an output in said transmitter, and in accordance therewith, generating a plurality of calibration values, receiving digital data to be transmitted, the digital data comprising a plurality of frequency components in said frequency range, and calibrating said frequency components of said digital data using the calibration values.Type: ApplicationFiled: June 19, 2007Publication date: December 25, 2008Applicant: WiLinx Inc.Inventors: Mahdi Bagheri, Rahim Bagheri, Saeed Chehrazi, Masoud Djafari, Hassan Maarefi, Ahmad Mirzaei, Edris Rostami, Alireza Tarighat-Mehrabani
-
Publication number: 20070090877Abstract: Embodiments of the present invention include circuits and methods with wide bandwidths. In one embodiment, parasitic capacitances of the output of a first stage and the input of a second stage are included in a network. The output of the first stage is coupled to the input of the network, and the input of the second stage is coupled to an intermediate node of the network. In one embodiment, the parasitic capacitance of the second stage is the largest capacitance in the network. In another embodiment, passive networks are coupled to the outputs of a stage, and one or more current injection circuits may be used to extend the bandwidth of the circuit.Type: ApplicationFiled: October 20, 2006Publication date: April 26, 2007Applicant: WiLinx, Inc.Inventors: Mahdi Bagheri, Rahim Bagheri, Ahmad Mirzaei, Abbas Komijani, Edris Rostami, Masoud Djafari