Patents Assigned to Axiom Microdevices, Inc.
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Patent number: 8577312Abstract: A system for controlling amplifier power is provided. The system includes a voltage envelope detector receiving a voltage signal and generating an attenuated voltage envelope signal. A current envelope detector receives a current signal and generates an attenuated current envelope signal. A controller receives power level data and generates attenuation control data for the voltage envelope signal and the current envelope signal. A detector receives the voltage envelope signal and the current envelope signal and generates a control signal based on the greater of the voltage envelope signal and the current envelope signal. A power amplifier level controller receives the control signal and generates a power amplifier level control signal.Type: GrantFiled: September 13, 2011Date of Patent: November 5, 2013Assignee: Axiom Microdevices, Inc.Inventors: Rahul Magoon, Scott D. Kee, Seyed-Ali Hajimiri, Ichiro Aoki, Roberto Aparicio Joo, Morten Damgaard, Setu Mohta, Geoff Hatcher
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Patent number: 8285239Abstract: A system for correcting a second order intermodulation product in a direct conversion receiver is provided. The system includes a cross-covariance system receiving a data signal and a second order intermodulation estimate signal and generating a cross-covariance value. An auto-covariance system receives the second order intermodulation estimate signal and generates an auto covariance value. A buffer system stores a second order intermodulation product correction factor. A divider receives the cross-covariance value, the auto-covariance value and the second order intermodulation product correction factor and generates a running average second order intermodulation product correction factor.Type: GrantFiled: October 4, 2011Date of Patent: October 9, 2012Assignee: Axiom Microdevices, Inc.Inventors: Alyosha Molnar, Morten Damgaard, Geoff Hatcher, Kenneth Chai-en Wu
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Patent number: 8242855Abstract: An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.Type: GrantFiled: March 29, 2011Date of Patent: August 14, 2012Assignee: Axiom Microdevices, Inc.Inventors: Scott D. Kee, Ichiro Aoki, Hui Wu, Seyed-Ali Hajimiri, Frank Carr, Rahul Magoon, Alexander Kral, Afshin Mellati, Florian Bohn, Donald McClymont
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Patent number: 8032102Abstract: A system for correcting a second order intermodulation product in a direct conversion receiver is provided. The system includes a cross-covariance system receiving a data signal and a second order intermodulation estimate signal and generating a cross-covariance value. An auto-covariance system receives the second order intermodulation estimate signal and generates an auto covariance value. A buffer system stores a second order intermodulation product correction factor. A divider receives the cross-covariance value, the auto-covariance value and the second order intermodulation product correction factor and generates a running average second order intermodulation product correction factor.Type: GrantFiled: January 15, 2008Date of Patent: October 4, 2011Assignee: Axiom Microdevices, Inc.Inventors: Alyosha Molnar, Morten Damgaard, Geoff Hatcher, Kenneth Chai-en Wu
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Patent number: 8019292Abstract: A system for controlling amplifier power is provided. The system includes a voltage envelope detector receiving a voltage signal and generating an attenuated voltage envelope signal. A current envelope detector receives a current signal and generates an attenuated current envelope signal. A controller receives power level data and generates attenuation control data for the voltage envelope signal and the current envelope signal. A detector receives the voltage envelope signal and the current envelope signal and generates a control signal based on the greater of the voltage envelope signal and the current envelope signal. A power amplifier level controller receives the control signal and generates a power amplifier level control signal.Type: GrantFiled: July 11, 2007Date of Patent: September 13, 2011Assignee: Axiom Microdevices, Inc.Inventors: Rahul Magoon, Scott Kee, Seyed-Ali Hajimiri, Ichiro Aoki, Roberto Aparicio Joo, Morten Damgaard, Setu Mohta, Geoff Hatcher
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Patent number: 7920833Abstract: A device having a radio front end is provided. The radio front end includes an inductor having a first end and a second end. A capacitor having a first end and a second end is connected to the second end of the inductor. An antenna is connected to the second end of the inductor and the second end of the capacitor. A first switch is connected to the first end of the inductor and the first end of the capacitor, wherein the inductor and capacitor form a resonant circuit when the first switch is closed. A second switch is connected to the resonant circuit, the second switch connecting the resonant circuit to ground through a low impedance when the first switch is closed. A third switch is connected to a transmit power amplifier connecting the transmit power amplifier to ground through a low impedance when the first switch is closed.Type: GrantFiled: July 11, 2007Date of Patent: April 5, 2011Assignee: Axiom Microdevices, Inc.Inventors: Dongjaing Qiao, Scott Kee, Ichiro Aoki, Donald McClymont
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Patent number: 7915960Abstract: An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.Type: GrantFiled: July 19, 2010Date of Patent: March 29, 2011Assignee: Axiom Microdevices, Inc.Inventors: Scott D. Kee, Ichiro Aoki, Hui Wu, Seyed-Ali Hajimiri, Frank Carr, Rahul Magoon, Alexandre Kral, Afshin Mellati, Florian Bohn, Donald McClymont
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Patent number: 7904045Abstract: A phase detector includes a plurality of phase detectors located in a phase correction loop, each phase detector configured to receive as input a radio frequency (RF) input signal and an RF reference signal, each of the plurality of phase detectors also configured to provide a signal representing a different phase offset based on the phase difference between the RE input signal and the RF reference signal; and a switch configured to receive an output of each of the plurality of phase detectors and configured to select the output representing the phase offset, that is closest to a phase of an output of an amplifier.Type: GrantFiled: June 29, 2007Date of Patent: March 8, 2011Assignee: Axiom Microdevices, Inc.Inventors: Ichiro Aoki, Scott D. Kee, Dongjiang Qiao, Alyosha C. Molnar
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Patent number: 7894546Abstract: A power amplifier includes a power amplifier core in which a transmit signal having an amplitude-modulated (AM) component and a phase-modulated (PM) component is passed and amplified, the power amplifier comprising a forward path, and an additional amplification device configured to generate an output that is proportional to an output of the power amplifier core, such that the output of the additional amplification device indirectly controls the output of the power amplifier core.Type: GrantFiled: June 29, 2007Date of Patent: February 22, 2011Assignee: Axiom Microdevices, Inc.Inventors: Rahul Magoon, Roberto Aparicio Joo, Scott D. Kee, Ichiro Aoki
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Patent number: 7894772Abstract: A limiter for minimizing an amount of phase change caused by input amplitude variation includes a variable gain amplifier configured to receive a signal having an amplitude component and a phase component and having a gain controlled by a compensation capacitance and a variable resistance, in which the compensation capacitance minimizes an effect of parasitic capacitance and the variable resistance adjusts a gain in the variable gain amplifier such that the amplitude component at an output of the variable gain amplifier remains substantially constant.Type: GrantFiled: June 29, 2007Date of Patent: February 22, 2011Assignee: Axiom Microdevices, Inc.Inventor: Ichiro Aoki
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Patent number: 7760025Abstract: An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.Type: GrantFiled: December 29, 2008Date of Patent: July 20, 2010Assignee: Axiom Microdevices, Inc.Inventors: Scott Kee, Ichiro Aoki, Hui Wu, Seyed-Ali Hajimiri, Frank Carr, Rahul Magoon, Alexandre Kral, Afshin Mellati, Florian Bohn, Donald McGlymont
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Patent number: 7756491Abstract: A phase shifter includes a plurality of variable gain elements, each variable gain element configured to receive one of a plurality of input signals, each input signal having a phase that is shifted with respect to each other input signal; and a control signal supplied to each variable gain element, where the control signals define a phase shift.Type: GrantFiled: June 29, 2007Date of Patent: July 13, 2010Assignee: Axiom Microdevices, Inc.Inventors: Scott D. Kee, Ichiro Aoki, Weifeng Feng
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Patent number: 7733176Abstract: A system for controlling amplifier power is provided. The system includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current envelope signal. A power amplifier level controller receives the greater of the voltage envelope signal and the current envelope signal, such as by connecting the output of the voltage envelope detector and the current envelope detector at a common point and conducting the high frequency current components to ground via a capacitor. A power amplifier level control signal is then generated based on the voltage drop across the capacitor.Type: GrantFiled: January 18, 2007Date of Patent: June 8, 2010Assignees: Infineon Technologies AG, Axiom Microdevices, Inc.Inventors: Rahul Magoon, Ichiro Aoki, John Lyu, Scott Kee, Roberto Aparico Joo, Winfried Bakalski, Thomas Bruder
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Patent number: 7710197Abstract: A system for processing a signal is provided. The system includes a differential amplifier receiving a radio-frequency input signal at a first differential input. A rectifying device such as a transistor has a control terminal that is coupled to an output of the differential amplifier and an output that is coupled to a second differential input of the differential amplifier. The second differential input of the differential amplifier receives a low frequency feedback signal from the output of the rectifying device, such as by damping the frequency response at the output of the rectifying device using a capacitor and a current source coupled to the output of the rectifying device.Type: GrantFiled: July 11, 2007Date of Patent: May 4, 2010Assignee: Axiom Microdevices, Inc.Inventors: Ichiro Aoki, Setu Mohta, Morten Damgaard
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Patent number: 7649411Abstract: A system for amplifying a signal is provided. The system includes a plurality of driver stages, each having an input, an output, and a disable control. An output stage having an input is coupled to the outputs of the plurality of driver stages. A plurality of disable control signals is provided to the driver stages so as to controllably enable and disable one or more of the driver stages.Type: GrantFiled: July 11, 2007Date of Patent: January 19, 2010Assignee: Axiom Microdevices, Inc.Inventors: Ichiro Aoki, Scott Kee, Seyed-Ali Hajimiri, Roberto Aparicio Joo, Rahul Magoon, Donald McClymont
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Patent number: 7570928Abstract: A system for controlling the power output of a power amplifier includes a power amplifier through which a transmit signal having an amplitude-modulated (AM) component and a phase-modulated (PM) component is passed and amplified, the power amplifier comprising a forward path, a feedback signal comprising a portion of the output of the power amplifier, a first control loop configured to receive the feedback signal and configured to apply an amplitude modulated (AM) signal to the power amplifier and configured to control the gain of the power amplifier, a second control loop configured to receive the feedback signal and configured to correct for offsets in the forward path and to linearize the first control loop; and a third control loop configured to receive the feedback signal and configured to control the phase of the PM component of the transmit signal.Type: GrantFiled: June 29, 2007Date of Patent: August 4, 2009Assignee: Axiom Microdevices, Inc.Inventors: Rahul Magoon, Morten Damgaard, Roberto Aparicio Joo, Scott D. Kee, Ichiro Aoki
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Patent number: 7486137Abstract: An architecture for detecting amplifier power is provided. The architecture includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current envelope signal. A power amplifier level controller receives the greater of the voltage envelope signal and the current envelope signal, such as by connecting the output of the voltage envelope detector and the current envelope detector at a common point and conducting the high frequency current components to ground via a capacitor. A power amplifier level control signal is then generated based on the voltage drop across the capacitor.Type: GrantFiled: January 18, 2007Date of Patent: February 3, 2009Assignee: Axiom Microdevices, Inc.Inventors: Rahul Magoon, Ichiro Aoki, John Lyu, Scott Kee, Roberto Aparico Joo
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Patent number: 7471153Abstract: An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.Type: GrantFiled: October 28, 2004Date of Patent: December 30, 2008Assignee: Axiom Microdevices, Inc.Inventors: Scott D. Kee, Ichiro Aoki, Hui Wu, Seyed-Ali Hajimiri, Frank Carr, Rabul Magoon, Alexandre Kral, Afshin Mellati, Florian Bohn, Donald McClymont
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Patent number: 7460844Abstract: A quadrature mixer with an LO input is provided. The quadrature mixer receives a signal having a frequency FLO and a signal input having a frequency FSIG, and has an output that comprises an output impedance that is high at frequencies of |FLO?FSIG | and |FLO+FSIG| and low at other. A mixer coupled to the output impedance interacts with the output impedance such that an impedance presented at the signal input is high for signals at FSIG if FSIG is a predetermined signal frequency, and low at other frequencies.Type: GrantFiled: January 28, 2005Date of Patent: December 2, 2008Assignee: Axiom Microdevices, Inc.Inventors: Alyosha Molnar, Rahul Magoon
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Patent number: RE45974Abstract: An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.Type: GrantFiled: November 12, 2013Date of Patent: April 12, 2016Assignee: AXIOM MICRODEVICES, INC.Inventors: Scott D. Kee, Ichiro Aoki, Hui Wu, Seyed-Ali Hajimiri, Frank Carr, Rahul Magoon, Alexander Kral, Afshin Mellati, Florian Bohn, Donald McClymont