Patents by Inventor Jesus A Castaneda
Jesus A Castaneda 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).
-
Publication number: 20110098009Abstract: A transceiver is provided for wireless communication. The transceiver can include a bias source, a transformer including a primary side and a secondary side, and a switching device. During a receive mode, the primary side of the transformer is configured to receive a first signal from a first port. During a transmission mode, the primary side is configured to transmit a second signal from a second port. The switching device is configured to couple the first port to the bias source during transmission of the second signal and to couple the second port to the bias source during receipt of the first signal. The bias source can be, for example, ground.Type: ApplicationFiled: January 4, 2011Publication date: April 28, 2011Applicant: Broadcom CorporationInventors: Bojko F. MARHOLEV, Jesus A. Castaneda
-
Publication number: 20110074633Abstract: Methods and systems for estimating an angle of arrival are provided. In an embodiment, a system for estimating angle of arrival includes a snapshot determining module configured to receive a signal from each antenna of an antenna array and to generate a snapshot vector including values based on the signals and an angle of arrival processing module configured to estimate an angle of arrival for the electromagnetic signal relative to the antenna array based on the snapshot vector. Each signal is representative of an electromagnetic signal incident on a respective antenna of the antenna array and each value is representative of a phase of a respective signal.Type: ApplicationFiled: September 30, 2010Publication date: March 31, 2011Applicant: Broadcom CorporationInventors: Ka Shun Carson PUN, Alfred Grau Besoli, Jesus Castaneda, Brima Ibrahim, David Garrett, Siukai Mak
-
Patent number: 7881677Abstract: A chip comprises and operational section and an input/output section. The operational section includes a controller. The input/output (I/O) section is coupled to the operational section. The I/O section comprises a transformer and a switching device. The transformer includes a primary side connected to first and second I/O ports and a secondary side connected to the operational section. The switching device is coupled to the controller and between the first and second I/O ports and a bias port, such that, under control of the controller, the switching device connects one of the first and second I/O ports to the bias port.Type: GrantFiled: September 24, 2007Date of Patent: February 1, 2011Assignee: Broadcom CorporationInventors: Bojko F. Marholev, Jesus A. Castaneda
-
Patent number: 7796970Abstract: An integrated circuit (IC) low noise amplifier includes an on-chip balun and an on-chip differential amplifier. The on-chip balun is coupled to convert a single-ended signal into a differential signal. The on-chip differential amplifier is coupled to amplify the differential signal.Type: GrantFiled: May 14, 2007Date of Patent: September 14, 2010Assignee: Broadcom CorporationInventors: Rozieh Rofougaran, Jesus A Castaneda, Hung Yu David Yang, Lijun Zhang
-
Publication number: 20100151810Abstract: A receiver includes an antenna array, an angular positioning module, a low noise amplifier module, and a down conversion module. The antenna array is operable to receive an inbound wireless signal. The angular positioning module is operable to: receive a plurality of received inbound wireless signals from the antenna array; determine angular position of a source of the inbound wireless signal from at least some of the plurality of received inbound wireless signals based on a first radiation pattern and a second radiation pattern of the plurality of received inbound wireless signals; and output a representation of the inbound wireless signal. The low noise amplifier module is operably coupled to amplify the representation of the inbound wireless signal to produce an amplified inbound wireless signal. The down conversion module is operably coupled to convert the amplified inbound wireless signal into a baseband or near baseband signal.Type: ApplicationFiled: May 30, 2009Publication date: June 17, 2010Applicant: BROADCOM CORPORATIONInventors: ALFRED GRAU BESOLI, NICOLAOS G. ALEXOPOULOS, JESUS CASTANEDA
-
Publication number: 20100151784Abstract: A receiver includes an antenna array, a plurality of phase shifters, a matrix module, a low noise amplifier module, and a down conversion module. The antenna array is operably coupled to receive an inbound wireless signal. The plurality of phase shifters is operably coupled to the antenna array and to produce a plurality of phase shifted inbound wireless signals. The matrix module is operably coupled to beamform the plurality of phase shifted inbound wireless signals to produce a plurality of beamformed and phase shifted inbound wireless signals. The low noise amplifier module is operably coupled to amplify one or more of the plurality of beamformed and phase shifted inbound wireless signals to produce one or more amplified inbound signals. The down conversion module is operably coupled to convert the one or more amplified inbound wireless signals into one or more baseband or near baseband signals.Type: ApplicationFiled: May 30, 2009Publication date: June 17, 2010Applicant: BROADCOM CORPORATIONInventors: ALFRED GRAU BESOLI, NICOLAOS G. ALEXOPOULOS, JESUS CASTANEDA
-
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
-
Publication number: 20080100526Abstract: A Radio Frequency (RF) structure services an antenna having a characteristic impedance and includes a differential Power Amplifier (PA), a differential Low Noise Amplifier (LNA), and a balun transformer. The differential PA has a differential PA output with a PA differential output impedance. The differential LNA has a differential LNA input with an LNA differential input impedance. The balun transformer has a singled ended winding coupled to the antenna, a differential winding having a first pair of tap connections coupled to the differential PA output and a second pair of tap connections coupled to the differential LNA input, and a turns ratio of the single ended winding and the differential winding. The turns ratio and the first pair of tap connections impedance match the PA differential output impedance to the characteristic impedance of the antenna. The turns ratio and the second pair of tap connections impedance match the LNA differential input impedance to the characteristic impedance of the antenna.Type: ApplicationFiled: January 2, 2008Publication date: May 1, 2008Applicant: BROADCOM CORPORATIONInventors: Jesus Castaneda, Ahmadreza (Reza) Rofougaran, Keith Carter
-
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
-
Publication number: 20080020717Abstract: A chip comprises and operational section and an input/output section. The operational section includes a controller. The input/output (I/O) section is coupled to the operational section. The I/O section comprises a transformer and a switching device. The transformer includes a primary side connected to first and second I/O ports and a secondary side connected to the operational section. The switching device is coupled to the controller and between the first and second I/O ports and a bias port, such that, under control of the controller, the switching device connects one of the first and second I/O ports to the bias port.Type: ApplicationFiled: September 24, 2007Publication date: January 24, 2008Applicant: Broadcom CorporationInventors: Bojko Marholev, Jesus Castaneda
-
Publication number: 20080001824Abstract: A low profile Planar Inverted-F Antenna (PIFA) comprises a radiating strip, an inductive tuning portion, a vertical feed portion, and a retracted ground plane. The radiating strip is approximately parallel to the ground plane and is suspended above the ground plane by the feed element at a certain distance. Further, the radiating strip, in part or entirely, overhangs the ground plane. In this way, the radiating strip may be suspended very close to the ground plane, but yet exhibits a large bandwidth.Type: ApplicationFiled: February 27, 2007Publication date: January 3, 2008Applicant: Broadcom CorporationInventors: Jesus Castaneda, Seow-Eng Mcllroy
-
Publication number: 20070296537Abstract: An impedance transformer includes a first winding and a second winding. The first winding includes a first plurality of winding components, wherein each of the first plurality of winding components is on a corresponding layer of a first set of layers of a supporting substrate. The second winding includes a second plurality of winding components, wherein each of the second plurality of winding components is on a corresponding layer of a second set of layers of the supporting substrate and the first and second sets of layers are interleaved. The first winding has a first impedance within a desired frequency range and the second winding has a second impedance within the desired frequency range, where the first and second impedances are based on at least one of spacing, trace width, and trace length of the first and second plurality of winding components.Type: ApplicationFiled: June 22, 2006Publication date: December 27, 2007Applicant: Broadcom Corporation, a California CorporationInventors: Seunghwan Yoon, Jesus Castaneda, Franco De Flaviis
-
Patent number: 7274913Abstract: A chip comprises and operational section and an input/output section. The operational section includes a controller. The input/output (I/O) section is coupled to the operational section. The I/O section comprises a transformer and a switching device. The transformer includes a primary side connected to first and second I/O ports and a secondary side connected to the operational section. The switching device is coupled to the controller and between the first and second I/O ports and a bias port, such that, under control of the controller, the switching device connects one of the first and second I/O ports to the bias port.Type: GrantFiled: October 15, 2004Date of Patent: September 25, 2007Assignee: Broadcom CorporationInventors: Bojko F. Marholev, Jesus A. Castaneda
-
Publication number: 20070213027Abstract: An integrated circuit (IC) low noise amplifier includes an on-chip balun and an on-chip differential amplifier. The on-chip balun is coupled to convert a single-ended signal into a differential signal. The on-chip differential amplifier is coupled to amplify the differential signal.Type: ApplicationFiled: May 14, 2007Publication date: September 13, 2007Applicant: BROADCOM CORPORATIONInventors: Rozieh Rofougaran, Jesus Castaneda, Hung Yu Yang, Lijun Zhang
-
Publication number: 20070152904Abstract: A Radio Frequency (RF) structure services an antenna having a characteristic impedance and includes a differential Power Amplifier (PA), a differential Low Noise Amplifier (LNA), and a balun transformer. The differential PA has a differential PA output with a PA differential output impedance. The differential LNA has a differential LNA input with an LNA differential input impedance. The balun transformer has a singled ended winding coupled to the antenna, a differential winding having a first pair of tap connections coupled to the differential PA output and a second pair of tap connections coupled to the differential LNA input, and a turns ratio of the single ended winding and the differential winding. The turns ratio and the first pair of tap connections impedance match the PA differential output impedance to the characteristic impedance of the antenna. The turns ratio and the second pair of tap connections impedance match the LNA differential input impedance to the characteristic impedance of the antenna.Type: ApplicationFiled: January 30, 2007Publication date: July 5, 2007Applicant: Broadcom Corporation, a California CorporationInventors: Jesus Castaneda, Ahmadreza (Reza) Rofougaran, Keith Carter
-
Patent number: 7218909Abstract: An integrated circuit (IC) low noise amplifier includes an on-chip balun and an on-chip differential amplifier. The on-chip balun is operably coupled to convert a single-ended signal into a differential signal. The on-chip differential amplifier is operably coupled to amplify the differential signal.Type: GrantFiled: September 17, 2004Date of Patent: May 15, 2007Assignee: Broadcom CorporationInventors: Rozleh Rofougaran, Jesus A Castaneda, Hung Yu David Yang, Lijun Zhang
-
Patent number: 7209727Abstract: An integrated RF front-end architecture is disclosed. Such an integrated RF front-end architecture includes a multi-tap balun, a low noise amplifier and a power amplifier core. The multi-tap balun includes a single-ended primary winding and a symmetrical multi-tap secondary winding, wherein the single-ended primary winding is operably coupled to an antenna. The low noise amplifier is coupled to a first set of taps of the symmetrical multi-tap secondary winding. The power amplifier core is coupled to a second set of taps of the symmetrical multi-tap secondary winding and can be a two stage amplifier having a driver stage and an output stage. The multi-tap balun, low noise amplifier and power amplifier core can be on-chip components or can be fabricated to be discrete components on a printed circuit board.Type: GrantFiled: June 12, 2003Date of Patent: April 24, 2007Assignee: Broadcom CorporationInventors: Jesus A. Castaneda, Iqbal S. Bhatti, Razieh Roufoogaran, Hung Yu Yang
-
Publication number: 20070080736Abstract: Off-chip LC circuit for lowest ground and VDD impedance for power amplifier. A novel approach is made by which a chip to PCB (Printer Circuit Board) interface may be made such that the ground and VDD potential levels are effectively brought onto the die of the chip such that a true ground potential is maintained within the chip. This off-chip LC circuit operates cooperatively with an on-chip decoupling capacitor to reduce the overall effective inductance of the bond wires employed to bring signal and voltage levels from the die to the chip exterior. This circuit ensures a relatively low impedance for a PA (Power Amplifier) that is implemented within chip thereby providing for improved performance.Type: ApplicationFiled: October 9, 2006Publication date: April 12, 2007Applicant: BROADCOM CORPORATIONInventors: Jesus Castaneda, Qiang (Tom) Li
-
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
-
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