Patents by Inventor Ehsan Adabi
Ehsan Adabi 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: 10873138Abstract: A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A cyclic staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.Type: GrantFiled: April 25, 2018Date of Patent: December 22, 2020Assignee: Avago Technologies International Sales Pte. LimitedInventors: Bevin George Perumana, Seunghwan Yoon, Bagher Afshar, Saikat Sarkar, Ehsan Adabi Firouzjaei, Michael John Inglis Boers, Jesus Alfonso Castaneda, Tirdad Sowlati
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Patent number: 10200067Abstract: Systems and methods for improving operational efficiency of a radio frequency system, which includes a low noise amplifier coupled to an antenna that generates an analog electrical signal based on received electromagnetic waves. The low noise amplifier includes a positive input transistor with a first drain, a negative input transistor with a second drain, a first data branch coupled between the first and second drains, and a second data branch coupled between the first drain and second drains. The first data branch supplies a first current modulated signal generated based on the analog electrical signal when the radio frequency system expects the received electromagnetic waves to include data indicated using a first communication protocol. The second data branch supplies a second current modulated signal generated based on the analog electrical signal when the radio frequency system expects the received electromagnetic waves to include data indicated using a second communication protocol.Type: GrantFiled: January 19, 2018Date of Patent: February 5, 2019Assignee: APPLE INC.Inventors: Ehsan Adabi, Albert C. Jerng
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Patent number: 10122391Abstract: Systems and method provided herein relate to reducing distortion of signals introduced by components on a phase path of a radio frequency system polar architecture. To reduce phase path distortion, a pre-distortion is introduced prior to a distortion caused by the components on the phase path. The pre-distortion in conjunction with the component distortion results in a transmission signal that forms its expected shape.Type: GrantFiled: September 30, 2015Date of Patent: November 6, 2018Assignee: Apple Inc.Inventors: Navid Lashkarian, Ehsan Adabi, Albert Chia-Wen Jerng, Arya Behzad, Ali Parsa
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Patent number: 10110180Abstract: Systems and method for improving operation of a radio frequency system are provided. One embodiment includes a switching power amplifier that outputs an amplified analog electrical signal based on an input electrical signal and voltage of an envelope voltage supply rail. The switching power amplifier includes a first transistor with a gate that receives the input electrical signal, a source electrically coupled to the envelope voltage supply rail, and a drain electrically coupled to an output of the switching power amplifier; a second transistor with a gate that receives the input electrical signal, a source electrically coupled to ground, and a drain electrically coupled to the output; and a third transistor with a gate that receives the input electrical signal, a drain electrically coupled to the envelope voltage supply rail, and a source electrically coupled to an output of another switching power amplifier.Type: GrantFiled: January 9, 2017Date of Patent: October 23, 2018Assignee: Apple Inc.Inventors: Ehsan Adabi, Albert C. Jerng
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Publication number: 20180241137Abstract: A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A cyclic staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.Type: ApplicationFiled: April 25, 2018Publication date: August 23, 2018Applicant: Avago Technologies General IP (Singapore) Pte. Ltd .Inventors: Bevin George Perumana, Seunghwan Yoon, Bagher Afshar, Saikat Sarkar, Ehsan Adabi Firouzjaei, Michael John Inglis Boers, Jesus Alfonso Castaneda, Tirdad Sowlati
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Patent number: 9985357Abstract: A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.Type: GrantFiled: December 13, 2013Date of Patent: May 29, 2018Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTDInventors: Bevin George Perumana, Seunghwan Yoon, Bagher Afshar, Saikat Sarkar, Ehsan Adabi Firouzjaei, Michael John Inglis Boers, Jesus Alfonso Castaneda, Tirdad Sowlati
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Publication number: 20180006619Abstract: Systems and method for improving operation of a radio frequency system are provided. One embodiment includes a switching power amplifier that outputs an amplified analog electrical signal based on an input electrical signal and voltage of an envelope voltage supply rail. The switching power amplifier includes a first transistor with a gate that receives the input electrical signal, a source electrically coupled to the envelope voltage supply rail, and a drain electrically coupled to an output of the switching power amplifier; a second transistor with a gate that receives the input electrical signal, a source electrically coupled to ground, and a drain electrically coupled to the output; and a third transistor with a gate that receives the input electrical signal, a drain electrically coupled to the envelope voltage supply rail, and a source electrically coupled to an output of another switching power amplifier.Type: ApplicationFiled: January 9, 2017Publication date: January 4, 2018Inventors: Ehsan Adabi, Albert C. Jerng
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Patent number: 9721718Abstract: A transformer includes multiple differential ports and first and second transformer windings. The first transformer winding includes a first transformer half-winding coupled to a first differential port of the differential ports. The first transformer winding also includes a second transformer half-winding coupled to a second differential port of the differential ports. An amplifier system that has a transformer is also provided. The amplifier system includes a first and a second stage amplifier. The first stage amplifier includes a first and a second amplifier. The second stage amplifier includes a third and a fourth amplifier. The transformer is coupled between the first stage amplifier and the second stage amplifier, where the transformer has a primary loop and a secondary loop. The primary loop of the transformer may be configured to receive differential signals of the first amplifier. A method for fabricating a transformer is also provided.Type: GrantFiled: April 29, 2015Date of Patent: August 1, 2017Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.Inventors: Sayedfarid Shirinfar, Ehsan Adabi Firouzjaei, Tirdad Sowlati, Ahmadreza Rofougaran
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Patent number: 9685981Abstract: Systems and method for improving operation of a radio frequency system are provided. One embodiment provides a radio frequency system that includes a first amplifier unit with a first logic gate, which receives an input analog electrical signal and a first bit of an amplifier control signal that enables or disables the first amplifier unit, and a first switching power amplifier that generates a first output analog electrical signal when enabled. The radio frequency system further includes a second amplifier unit with a second logic gate, which receives the input analog electrical signal and a second bit of the amplifier control signal that enables or disables the second amplifier unit, and a second switching power amplifier that generates a second output analog electrical signal when enabled. The first amplifier unit and the second amplifier unit are electrically coupled to enable the first output analog electrical signal and the second output analog electrical signal to be combined.Type: GrantFiled: March 6, 2015Date of Patent: June 20, 2017Assignee: APPLE INC.Inventors: Ehsan Adabi, Albert C. Jerng
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Publication number: 20170093444Abstract: Systems and method provided herein relate to reducing distortion of signals introduced by components on a phase path of a radio frequency system polar architecture. To reduce phase path distortion, a pre-distortion is introduced prior to a distortion caused by the components on the phase path. The pre-distortion in conjunction with the component distortion results in a transmission signal that forms its expected shape.Type: ApplicationFiled: September 30, 2015Publication date: March 30, 2017Inventors: Navid Lashkarian, Ehsan Adabi, Albert Chia-Wen Jerng, Arya Behzad, Ali Parsa
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Patent number: 9577577Abstract: An apparatus includes a cascode amplifier. The cascode amplifier includes a first transistor and a second transistor. The cascode amplifier is configured to receive a first bias voltage, a second bias voltage, and a signal. The cascode amplifier is also configured to amplify the signal based at least on the first bias voltage and the second bias voltage. The apparatus also includes a first feedback module and a second feedback module. The first feedback module is configured to adjust the first bias voltage based at least on the amplified signal. The second feedback module is configured to adjust the second bias voltage based at least on a voltage distribution across the first transistor and the second transistor. A system and method for maintaining cascode amplifier performance are also provided.Type: GrantFiled: May 14, 2015Date of Patent: February 21, 2017Assignee: Broadcom CorporationInventors: Tirdad Sowlati, Ehsan Adabi, Sayedfarid Shirinfar, Ahmadreza Rofougaran
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Patent number: 9543910Abstract: Systems and method for improving operation of a radio frequency system are provided. One embodiment describes a radio frequency system, which includes a first switching power amplifier that outputs an amplified analog electrical signal based on a first input analog electrical signal and voltage of an envelope voltage supply rail.Type: GrantFiled: March 6, 2015Date of Patent: January 10, 2017Assignee: Apple Inc.Inventors: Ehsan Adabi, Albert C. Jerng
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Publication number: 20160261293Abstract: Systems and method for improving operation of a radio frequency system are provided. One embodiment provides a radio frequency system that includes a first amplifier unit with a first logic gate, which receives an input analog electrical signal and a first bit of an amplifier control signal that enables or disables the first amplifier unit, and a first switching power amplifier that generates a first output analog electrical signal when enabled. The radio frequency system further includes a second amplifier unit with a second logic gate, which receives the input analog electrical signal and a second bit of the amplifier control signal that enables or disables the second amplifier unit, and a second switching power amplifier that generates a second output analog electrical signal when enabled. The first amplifier unit and the second amplifier unit are electrically coupled to enable the first output analog electrical signal and the second output analog electrical signal to be combined.Type: ApplicationFiled: March 6, 2015Publication date: September 8, 2016Inventors: Ehsan Adabi, Albert C. Jerng
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Publication number: 20160261243Abstract: Systems and method for improving operation of a radio frequency system are provided. One embodiment describes a radio frequency system, which includes a first switching power amplifier that outputs an amplified analog electrical signal based on a first input analog electrical signal and voltage of an envelope voltage supply rail.Type: ApplicationFiled: March 6, 2015Publication date: September 8, 2016Inventors: Ehsan Adabi, Albert C. Jerng
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Publication number: 20150303878Abstract: An apparatus includes a cascode amplifier. The cascode amplifier includes a first transistor and a second transistor. The cascode amplifier is configured to receive a first bias voltage, a second bias voltage, and a signal. The cascode amplifier is also configured to amplify the signal based at least on the first bias voltage and the second bias voltage. The apparatus also includes a first feedback module and a second feedback module. The first feedback module is configured to adjust the first bias voltage based at least on the amplified signal. The second feedback module is configured to adjust the second bias voltage based at least on a voltage distribution across the first transistor and the second transistor. A system and method for maintaining cascode amplifier performance are also provided.Type: ApplicationFiled: May 14, 2015Publication date: October 22, 2015Inventors: Tirdad SOWLATI, Ehsan ADABI, Sayedfarid SHIRINFAR, Ahmadreza ROFOUGARAN
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Publication number: 20150248964Abstract: A transformer includes multiple differential ports and first and second transformer windings. The first transformer winding includes a first transformer half-winding coupled to a first differential port of the differential ports. The first transformer winding also includes a second transformer half-winding coupled to a second differential port of the differential ports. An amplifier system that has a transformer is also provided. The amplifier system includes a first and a second stage amplifier. The first stage amplifier includes a first and a second amplifier. The second stage amplifier includes a third and a fourth amplifier. The transformer is coupled between the first stage amplifier and the second stage amplifier, where the transformer has a primary loop and a secondary loop. The primary loop of the transformer may be configured to receive differential signals of the first amplifier. A method for fabricating a transformer is also provided.Type: ApplicationFiled: April 29, 2015Publication date: September 3, 2015Inventors: Sayedfarid SHIRINFAR, Ehsan ADABI FIROUZJAEI, Tirdad SOWLATI, Ahmadreza ROFOUGARAN
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Patent number: 9065387Abstract: Systems and methods for maintaining power amplifier performance are provided. A system includes a bias supply that generates a bias voltage, and at least one primary power amplifier (PA) that receives the bias voltage and a primary radio frequency (RF) input. The at least one primary PA amplifies the primary RF input based on the bias voltage. The system includes an auxiliary PA that is connected in parallel with the at least one primary PA and receives the bias voltage and an auxiliary RF input, which is a scaled version of the primary RF input. The auxiliary PA amplifies the auxiliary RF input based on the bias voltage. The system includes a detector that measures an output voltage associated with the amplified auxiliary RF input, and a comparator that compares the measured output voltage to a reference voltage. The bias supply adjusts the bias voltage based on the comparison.Type: GrantFiled: December 13, 2012Date of Patent: June 23, 2015Assignee: Broadcom CorporationInventors: Tirdad Sowlati, Ehsan Adabi, Sayedfarid Shirinfar, Ahmadreza Rofougaran
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Patent number: 9048018Abstract: A transformer has first and second transformer windings including multiple differential ports. Each of the first and second transformer windings include a first transformer half-winding coupled to a first differential port of the differential ports. Each of the first and second transformer windings also include a second transformer half-winding coupled to a second differential port of the differential ports. Each of the first and second transformer windings is divided symmetrically at a common node to form the respective first and second transformer half-windings. The first transformer half-winding is configured to form one half of an inductance in each of the first and second transformer windings. The second transformer half-winding is configured to form another half of the inductance in each of the first and second transformer windings. The common node of the first transformer winding is configured to receive a supply voltage.Type: GrantFiled: May 15, 2013Date of Patent: June 2, 2015Assignee: Broadcom CorporationInventors: Sayedfarid Shirinfar, Ehsan Adabi Firouzjaei, Tirdad Sowlati, Ahmadreza Rofougaran
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Publication number: 20150123873Abstract: A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.Type: ApplicationFiled: December 13, 2013Publication date: May 7, 2015Inventors: Bevin George Perumana, Seunghwan Yoon, Bagher Afshar, Saikat Sarkar, Ehsan Adabi Firouzjaei, Michael John Inglis Boers, Jesus Alfonso Castaneda, Tirdad Sowlati
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Publication number: 20140306755Abstract: A transformer has first and second transformer windings including multiple differential ports. Each of the first and second transformer windings include a first transformer half-winding coupled to a first differential port of the differential ports. Each of the first and second transformer windings also include a second transformer half-winding coupled to a second differential port of the differential ports. Each of the first and second transformer windings is divided symmetrically at a common node to form the respective first and second transformer half-windings. The first transformer half-winding is configured to form one half of an inductance in each of the first and second transformer windings. The second transformer half-winding is configured to form another half of the inductance in each of the first and second transformer windings. The common node of the first transformer winding is configured to receive a supply voltage.Type: ApplicationFiled: May 15, 2013Publication date: October 16, 2014Applicant: Broadcom CorporationInventors: Sayedfarid SHIRINFAR, Ehsan ADABI FIROUZJAEI, Tirdad SOWLATI, Ahmadreza ROFOUGARAN