Patents by Inventor Aminghasem Safarian
Aminghasem Safarian 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: 9379785Abstract: A near field RFID system includes an RFID reader and an RFID tag. The RFID reader includes a transmit path and a receive path, wherein the transmit path includes: an encoding section coupled to convert data into encoded data; a digital to analog conversion module coupled to convert the encoded data into an analog encoded signal; a power amplifier coupled to amplify the analog encoded signal; and a plurality of coils coupled to generate a plurality of electromagnetic fields from the analog encoded signal. The RFID tag that includes: a coil coupled to generate a current and a recovered signal from at least one of the plurality of electromagnetic fields; a power recovery circuit coupled to generate a voltage from the current; and a data processing section coupled to process the recovered signal, wherein the data processing section is powered via the voltage.Type: GrantFiled: January 3, 2011Date of Patent: June 28, 2016Assignee: BROADCOM CORPORATIONInventors: Amin Shameli, Aminghasem Safarian, Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Franco De Flaviis
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Patent number: 9077366Abstract: Techniques and devices provide analog-to-digital conversion at two or more signal frequencies or frequency hands and can be used to construct multi-mode analog-to-digital converters in various circuits, including receivers and transceivers for wireless communications and radio broadcast environments. Adjustable analog-to-digital converters based on the described techniques can be configured to adjust circuit parameters to adapt the technical specifications of different input signals at different signal frequencies or frequency bands, such as FM, HD-radio, and DAB radio signals in radio receiver applications.Type: GrantFiled: August 17, 2013Date of Patent: July 7, 2015Assignee: Broadcom CorporationInventors: Henrik Tholstrup Jensen, Jianhua Gan, Seema Anand, Aminghasem Safarian
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Patent number: 8983418Abstract: Techniques and devices are disclosed to provide multi-stage gain control in circuits or devices having two or more stages of signal amplification. A circuit with multi-stage gain control can include amplification stages coupled to receive an input signal and to produce an amplified output signal. Each amplification stage includes an amplifier that is adjustable in gain and a signal detector that is coupled to measure an output signal of the amplifier and to produce a detector signal indicative of a signal strength of the output signal of the amplifier. A gain control circuit is coupled to receive detector signals from the signal detectors in the amplification stages, respectively, and to control gains of the amplifiers of the amplification stages based on respective received detector signals, respectively.Type: GrantFiled: June 20, 2011Date of Patent: March 17, 2015Assignee: Broadcom CorporationInventors: Amir Ibrahim, Henrik Tholstrup Jensen, Shahla Khorram, Aminghasem Safarian, Seema Anand
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Patent number: 8929808Abstract: A power amplifier, supplied by a supply voltage, to drive an antenna to output a magnetic field, comprising a differential stage configured to output an output signal to drive the antenna, and a feedback stage configured to receive a common mode output voltage from the differential stage and to output a feedback voltage to regulate the output common mode signal to be proportional to the supply.Type: GrantFiled: September 29, 2011Date of Patent: January 6, 2015Assignee: Broadcom CorporationInventors: Bojko Marholev, Aminghasem Safarian
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Publication number: 20130331052Abstract: Techniques and devices provide analog-to-digital conversion at two or more signal frequencies or frequency hands and can be used to construct multi-mode analog-to-digital converters in various circuits, including receivers and transceivers for wireless communications and radio broadcast environments. Adjustable analog-to-digital converters based on the described techniques can be configured to adjust circuit parameters to adapt the technical specifications of different input signals at different signal frequencies or frequency bands, such as FM, HD-radio, and DAB radio signals in radio receiver applications.Type: ApplicationFiled: August 17, 2013Publication date: December 12, 2013Applicant: Broadcom CorporationInventors: Henrik Tholstrup Jensen, Jianhua Gan, Seema Anand, Aminghasem Safarian
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Patent number: 8519878Abstract: Techniques and devices provide analog-to-digital conversion at two or more signal frequencies or frequency bands and can be used to construct multi-mode analog-to-digital converters in various circuits, including receivers and transceivers for wireless communications and radio broadcast environments. Adjustable analog-to-digital converters based on the described techniques can be configured to adjust circuit parameters to adapt the technical specifications of different input signals at different signal frequencies or frequency bands, such as FM, HD-radio, and DAB radio signals in radio receiver applications.Type: GrantFiled: June 27, 2011Date of Patent: August 27, 2013Assignee: Broadcom CorporationInventors: Henrik Tholstrup Jensen, Jianhua Gan, Seema Anand, Aminghasem Safarian
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Publication number: 20130084799Abstract: A power amplifier, supplied by a supply voltage, to drive an antenna to output a magnetic field, comprising a differential stage configured to output an output signal to drive the antenna, and a feedback stage configured to receive a common mode output voltage from the differential stage and to output a feedback voltage to regulate the output common mode signal to be proportional to the supplyType: ApplicationFiled: September 29, 2011Publication date: April 4, 2013Applicant: Broadcom CorporationInventors: Bojko MARHOLEV, Aminghasem SAFARIAN
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Publication number: 20120326904Abstract: Techniques and devices provide analog-to-digital conversion at two or more signal frequencies or frequency bands and can be used to construct multi-mode analog-to-digital converters in various circuits, including receivers and transceivers for wireless communications and radio broadcast environments. Adjustable analog-to-digital converters based on the described techniques can be configured to adjust circuit parameters to adapt the technical specifications of different input signals at different signal frequencies or frequency bands, such as FM, HD-radio, and DAB radio signals in radio receiver applications.Type: ApplicationFiled: June 27, 2011Publication date: December 27, 2012Applicant: BROADCOM CORPORATIONInventors: Henrik Tholstrup Jensen, Jianhua Gan, Seema Anand, Aminghasem Safarian
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Publication number: 20120319774Abstract: Techniques and devices are disclosed to provide multi-stage gain control in circuits or devices having two or more stages of signal amplification. A circuit with multi-stage gain control can include amplification stages coupled to receive an input signal and to produce an amplified output signal. Each amplification stage includes an amplifier that is adjustable in gain and a signal detector that is coupled to measure an output signal of the amplifier and to produce a detector signal indicative of a signal strength of the output signal of the amplifier. A gain control circuit is coupled to receive detector signals from the signal detectors in the amplification stages, respectively, and to control gains of the amplifiers of the amplification stages based on respective received detector signals, respectively.Type: ApplicationFiled: June 20, 2011Publication date: December 20, 2012Applicant: BROADCOM CORPORATIONInventors: Amir Ibrahim, Henrik Tholstrup Jensen, Shahla Khorram, Aminghasem Safarian, Seema Anand
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Patent number: 8112056Abstract: A novel DDCR RF front-end for use in UWB applications combining a distributed approach which provides wideband functionality of the RF front-end with I-Q requirement of DCRs. The distributed architecture uses composite cells of a merged LNA and mixer along the input RF T-line.Type: GrantFiled: July 25, 2008Date of Patent: February 7, 2012Assignee: The Regents of The University of CaliforniaInventors: Aminghasem Safarian, Lei Zhou, Payam Heydari
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Patent number: 8094025Abstract: A receiver architecture for canceling blocking signals in the receive path includes a low noise amplifier for receiving and amplifying an inbound RF signal to produce an amplified inbound signal, in which the inbound RF signal includes a modulated RF signal and a blocking signal, and a cancellation module for substantially canceling the blocking signal from the amplified inbound RF signal and substantially passing the modulated RF signal. The cancellation module cancels the blocking signal by generating an injection signal representative of the blocking signal, combining the blocking signal with the injection signal to produce an error signal, updating the injection signal based on the error signal and using the injection signal to cancel the blocking signal from the amplified inbound RF signal.Type: GrantFiled: November 9, 2010Date of Patent: January 10, 2012Assignee: Broadcom CorporationInventors: Aminghasem Safarian, Amin Shameli, Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
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Publication number: 20110111695Abstract: A near field RFID system includes an RFID reader and an RFID tag. The RFID reader includes a transmit path and a receive path, wherein the transmit path includes: an encoding section coupled to convert data into encoded data; a digital to analog conversion module coupled to convert the encoded data into an analog encoded signal; a power amplifier coupled to amplify the analog encoded signal; and a plurality of coils coupled to generate a plurality of electromagnetic fields from the analog encoded signal. The RFID tag that includes: a coil coupled to generate a current and a recovered signal from at least one of the plurality of electromagnetic fields; a power recovery circuit coupled to generate a voltage from the current; and a data processing section coupled to process the recovered signal, wherein the data processing section is powered via the voltage.Type: ApplicationFiled: January 3, 2011Publication date: May 12, 2011Applicant: BROADCOM CORPORATIONInventors: Amin Shameli, Aminghasem Safarian, Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Franco De Flaviis
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Publication number: 20110051670Abstract: A receiver architecture for canceling blocking signals in the receive path includes a low noise amplifier for receiving and amplifying an inbound RF signal to produce an amplified inbound signal, in which the inbound RF signal includes a modulated RF signal and a blocking signal, and a cancellation module for substantially canceling the blocking signal from the amplified inbound RF signal and substantially passing the modulated RF signal. The cancellation module cancels the blocking signal by generating an injection signal representative of the blocking signal, combining the blocking signal with the injection signal to produce an error signal, updating the injection signal based on the error signal and using the injection signal to cancel the blocking signal from the amplified inbound RF signal.Type: ApplicationFiled: November 9, 2010Publication date: March 3, 2011Applicant: BROADCOM CORPORATIONInventors: Aminghasem Safarian, Amin Shameli, Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
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Patent number: 7898418Abstract: A receiver architecture for canceling blocking signals in the receive path includes a low noise amplifier for receiving and amplifying an inbound RF signal to produce an amplified inbound signal, in which the inbound RF signal includes a modulated RF signal and a blocking signal, and a cancellation module for substantially canceling the blocking signal from the amplified inbound RF signal and substantially passing the modulated RF signal. The cancellation module cancels the blocking signal by generating an injection signal representative of the blocking signal, combining the blocking signal with the injection signal to produce an error signal, updating the injection signal based on the error signal and using the injection signal to cancel the blocking signal from the amplified inbound RF signal.Type: GrantFiled: February 27, 2007Date of Patent: March 1, 2011Assignee: Broadcom CorporationInventors: Aminghasem Safarian, Amin Shameli, Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
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Patent number: 7792513Abstract: Described herein are ultra wide-band distributed RF (UWB-DRF) front-end receivers comprising composite cells distributed along transmission lines, where each composite cell comprises a low-noise amplifier (LNA) merged with a mixer. By merging the LNA and the mixer in each composite cell, the power consumption and chip area of the RF front-end is reduced. Further, the distributed architecture of the RF front-end allows it to operate over a wide bandwidth by absorbing the parasitic capacitances of the composite cells into the transmission lines of the RF-front end. Embodiments of the RF front-end provide wideband flat gain, low noise figure (NF), wideband linearity, and wideband matching at the inputs of the RF front-end. In an embodiment, a programmable resistance at the termination of the RF transmission line allows the RF front-end to trade off a few decibels of mismatch at the RF input for higher gain and lower NF.Type: GrantFiled: September 19, 2007Date of Patent: September 7, 2010Assignee: The Regents of the University of CaliforniaInventors: Aminghasem Safarian, Lei Zhou, Payam Heydari
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Publication number: 20090088115Abstract: A novel DDCR RF front-end for use in UWB applications combining a distributed approach which provides wideband functionality of the RF front-end with I-Q requirement of DCRs. The distributed architecture uses composite cells of a merged LNA and mixer along the input RF T-line.Type: ApplicationFiled: July 25, 2008Publication date: April 2, 2009Inventors: Aminghasem Safarian, Lei Zhou, Payam Heydari
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Publication number: 20090075613Abstract: Described herein are ultra wide-band distributed RF (UWB-DRF) front-end receivers comprising composite cells distributed along transmission lines, where each composite cell comprises a low-noise amplifier (LNA) merged with a mixer. By merging the LNA and the mixer in each composite cell, the power consumption and chip area of the RF front-end is reduced. Further, the distributed architecture of the RF front-end allows it to operate over a wide bandwidth by absorbing the parasitic capacitances of the composite cells into the transmission lines of the RF-front end. Embodiments of the RF front-end provide wideband flat gain, low noise figure (NF), wideband linearity, and wideband matching at the inputs of the RF front-end. In an embodiment, a programmable resistance at the termination of the RF transmission line allows the RF front-end to trade off a few decibels of mismatch at the RF input for higher gain and lower NF.Type: ApplicationFiled: September 19, 2007Publication date: March 19, 2009Inventors: Aminghasem Safarian, Lei Zhou, Payam Heydari
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Publication number: 20090017770Abstract: According to one exemplary embodiment, a transceiver providing noise cancellation has a transmitter and a receiver, and comprises a noise cancellation system receiving input from the transmitter. The noise cancellation system generates a noise cancellation signal injected into the receiver such that the noise cancellation signal has an amplitude substantially matching an amplitude of a noise signal in the receiver, and a phase substantially opposite to a phase of the noise signal in the receiver. In one exemplary embodiment, a noise cancellation system comprises a forward injection circuit including a scaling and rotation block, and first and second phase shift and attenuation controllers providing feedback from outputs of the receiver. In one exemplary embodiment, the scaling and rotation block includes first, second, third, and fourth amplifiers to receive a down-converted noise signal and provide a noise cancellation signal.Type: ApplicationFiled: July 11, 2007Publication date: January 15, 2009Applicant: BROADCOM CORPORATIONInventors: Ahmad Mirzaei, Hooman Darabi, Ahmadreza Rofougaran, Aminghasem Safarian
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Patent number: 7471204Abstract: A receiver architecture for canceling blocking signals in the receive path includes a low noise amplifier for receiving and amplifying an inbound RF signal to produce an amplified inbound signal, in which the inbound RF signal includes a modulated RF signal and a blocking signal, and a cancellation module for substantially canceling the blocking signal from the amplified inbound RF signal and substantially passing the modulated RF signal. The cancellation module cancels the blocking signal by generating an injection signal representative of the blocking signal, combining the blocking signal with the injection signal to produce an error signal, updating the injection signal based on the error signal and using the injection signal to cancel the blocking signal from the amplified inbound RF signal.Type: GrantFiled: July 7, 2006Date of Patent: December 30, 2008Assignee: Broadcom CorporationInventors: Aminghasem Safarian, Ahmadreza (Reza) Rofougaran
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Publication number: 20080299935Abstract: An IC includes an RF front end, a down conversion module, an up conversion module, and a local oscillation generating module. The RF front end includes a receive section, a transmit section, and an interference reduction module. The receive section receives an inbound RF signal within a receive frequency band and the transmit section transmits an outbound RF signal within a transmit frequency band. The interference reduction module is coupled to at least one of the receive section and the transmit section and facilitates at least one of: attenuating energy of the outbound RF signal within the receive frequency band based on a transmit local oscillation or a receive local oscillation; and attenuating energy of the inbound RF signal within the transmit frequency band based on the transmit local oscillation or the receive local oscillation.Type: ApplicationFiled: August 2, 2007Publication date: December 4, 2008Applicant: Broadcom Corporation, a California CorporationInventors: Aminghasem Safarian, Hooman Darabi, Ahmad Mirzaei, Ahmadreza (Reza) Rofougaran, Maryam Rofougaran