Patents by Inventor Iqbal Bhatti
Iqbal Bhatti 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: 8600315Abstract: Methods and systems for a configurable front end are disclosed. Aspects of one method may include a transceiver on a single chip that may comprise a power amplifier (PA) and a low noise amplifier (LNA). The PA may amplify signals to be transmitted over a range of output transmit power. An upper limit for a power range may of substantially 12 dBm. The LNA may be tolerant to PA signals by, for example, being configured to follow signal voltages generated from an output of the power amplifier. For example, each input transistor of the LNA may be isolated from other transistors in the LNA. Accordingly, the input transistors may float since they may not be tied to a voltage level via other transistors. This may allow the input transistors to avoid damage. The transceiver may also be configured for differential RF input, differential RF output, single-ended RF input, and/or single-ended RF output.Type: GrantFiled: May 29, 2007Date of Patent: December 3, 2013Assignee: Broadcom CorporationInventors: Razieh Roufoogaran, Iqbal Bhatti
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Publication number: 20120231752Abstract: Methods and systems for a configurable front end are disclosed. Aspects of one method may include a transceiver on a single chip that may comprise a power amplifier (PA) and a low noise amplifier (LNA). The PA may amplify signals to be transmitted over a range of output transmit power. An upper limit for a power range may of substantially 12 dBm. The LNA may be tolerant to PA signals by, for example, being configured to follow signal voltages generated from an output of the power amplifier. For example, each input transistor of the LNA may be isolated from other transistors in the LNA. Accordingly, the input transistors may float since they may not be tied to a voltage level via other transistors. This may allow the input transistors to avoid damage. The transceiver may also be configured for differential RF input, differential RF output, single-ended RF input, and/or single-ended RF output.Type: ApplicationFiled: May 29, 2007Publication date: September 13, 2012Inventors: Razieh Roufoogaran, Iqbal Bhatti
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Patent number: 7526256Abstract: An apparatus and method for allowing two different signal paths to be coupled to a multi-tap transformer balun. The multi-tap transformer has a first port, which is coupled to a single antenna, and two or more differential secondary ports. Each port has one or more taps, which are optimized separately for each of the signal paths, allowing each of the two or more signal paths to operate in different frequency bands. Use of the method of the invention can decrease the number of external components and integrated circuit package pins, and reduce the area required for each signal path on an integrated circuit die, a printed circuit board, or the like.Type: GrantFiled: May 25, 2005Date of Patent: April 28, 2009Assignee: Broadcom CorporationInventors: Iqbal Bhatti, Jesus Castaneda, Bojko F. Marholev
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Patent number: 7365602Abstract: A multi-level power amplifier architecture using a multi-tap transformer implemented on a single CMOS integrated circuit wireless communications device is described. By providing a multi-tap transformer for coupling a plurality of power amplifiers to a shared output impedance, such as an antenna, power transmission may be made at different levels while maintaining efficiency. With a multi-tap transformer having “N” taps featuring “N” different impedance levels, each tap may be connected to an amplifier cell which delivers power into the transformer at the tap for coupling to the output load. Any one of the “N” amplifier cells can be turned on at once along with any combination of the “N” amplifier cells.Type: GrantFiled: October 26, 2006Date of Patent: April 29, 2008Assignee: Broadcom CorporationInventors: Iqbal Bhatti, Jesus Castaneda
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Publication number: 20070069818Abstract: A multi-level power amplifier architecture using a multi-tap transformer implemented on a single CMOS integrated circuit wireless communications device is described. By providing a multi-tap transformer for coupling a plurality of power amplifiers to a shared output impedance, such as an antenna, power transmission may be made at different levels while maintaining efficiency. With a multi-tap transformer having “N” taps featuring “N” different impedance levels, each tap may be connected to an amplifier cell which delivers power into the transformer at the tap for coupling to the output load. Any one of the “N” amplifier cells can be turned on at once along with any combination of the “N” amplifier cells.Type: ApplicationFiled: October 26, 2006Publication date: March 29, 2007Applicant: Broadcom CorporationInventors: Iqbal Bhatti, Jesus Castaneda
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Publication number: 20060270377Abstract: An apparatus and method for allowing two different signal paths to be coupled to a multi-tap transformer balun. The multi-tap transformer has a first port, which is coupled to a single antenna, and two or more differential secondary ports. Each port has one or more taps, which are optimized separately for each of the signal paths, allowing each of the two or more signal paths to operate in different frequency bands. Use of the method of the invention can decrease the number of external components and integrated circuit package pins, and reduce the area required for each signal path on an integrated circuit die, a printed circuit board, or the like.Type: ApplicationFiled: May 25, 2005Publication date: November 30, 2006Inventors: Iqbal Bhatti, Jesus Castaneda, Bojko Marholev
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Patent number: 7129784Abstract: A multi-level power amplifier architecture using a multi-tap transformer implemented on a single CMOS integrated circuit wireless communications device is described. By providing a multi-tap transformer for coupling a plurality of power amplifiers to a shared output impedance, such as an antenna, power transmission may be made at different levels while maintaining efficiency. With a multi-tap transformer having “N” taps featuring “N” different impedance levels, each tap may be connected to an amplifier cell which delivers power into the transformer at the tap for coupling to the output load. Any one of the “N” amplifier cells can be turned on at once along with any combination of the “N” amplifier cells.Type: GrantFiled: October 28, 2004Date of Patent: October 31, 2006Assignee: Broadcom CorporationInventors: Iqbal Bhatti, Jesus Castaneda
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Publication number: 20060091958Abstract: A multi-level power amplifier architecture using a multi-tap transformer implemented on a single CMOS integrated circuit wireless communications device is described. By providing a multi-tap transformer for coupling a plurality of power amplifiers to a shared output impedance, such as an antenna, power transmission may be made at different levels while maintaining efficiency. With a multi-tap transformer having “N” taps featuring “N” different impedance levels, each tap may be connected to an amplifier cell which delivers power into the transformer at the tap for coupling to the output load. Any one of the “N” amplifier cells can be turned on at once along with any combination of the “N” amplifier cells.Type: ApplicationFiled: October 28, 2004Publication date: May 4, 2006Applicant: Broadcom CorporationInventors: Iqbal Bhatti, Jesus Castaneda
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Publication number: 20050191977Abstract: An on-chip impedance matching includes a transistor and a tank circuit. The transistor is operably coupled to receive an input signal. The tank circuit is operably coupled to the transistor, wherein a tap of the tank circuit provides an output of the on-chip impedance matching power amplifier, wherein the tank circuit is tuned with respect to an antenna load of the on-chip impedance matching power amplifier.Type: ApplicationFiled: May 3, 2005Publication date: September 1, 2005Inventor: Iqbal Bhatti
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Publication number: 20050043006Abstract: A radio frequency circuit includes a first differential RF path and a second differential path. The first differential RF path includes at least one RF block that includes a first differential section and a second differential section, wherein the first differential section is symmetrical with the second differential section. The second differential RF path includes at least one RF block that includes a first differential section and a second differential section, wherein the first differential section is symmetrical with the second differential section. The first and second half differential sections of the at least one RF block of the first differential RF path are symmetrically placed on at least one layer around the first and second half differential sections of the at least one RF block of the second differential RF path, wherein the first and second half differential sections of the at least one RF block of the second differential RF path are fabricated on the at least one layer.Type: ApplicationFiled: August 21, 2003Publication date: February 24, 2005Inventors: Iqbal Bhatti, Rozi (Razieh) Roufoogaran