Patents by Inventor Alex Rabinovich
Alex Rabinovich 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: 7173484Abstract: A dual loop feedforward power amplifier. A dual loop feedforward power amplifier, comprising an input that provides a multicarrier signal; a first feedforward power amplifier; and a second feedforward power amplifier, wherein the first feedforward power amplifier serves as a main amplifier gain block in the second feedforward power amplifier, wherein the first feedforward power amplifier comprises a carrier cancellation loop and a first error amplifier loop, and wherein the second feedforward power amplifier comprises a third loop and a fourth loop that cancel small signal distortions that are not reduced by the first feedforward amplifier.Type: GrantFiled: November 25, 2003Date of Patent: February 6, 2007Assignee: Powerwave Technologies, Inc.Inventors: Alex Rabinovich, Mark Gurvich, Jianqing He
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Patent number: 7049907Abstract: A group delay adjusting circuit. The group delay adjusting circuit comprises an electronically adjustable variable capacitance, and an electronically variable virtual inductor coupled in parallel to the electronically variable capacitance at a node.Type: GrantFiled: March 19, 2004Date of Patent: May 23, 2006Assignee: Powerwave Technologies, Inc.Inventors: Mark Gurvich, Alex Rabinovich, Nikolai Maslennikov, Jianqing He
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Patent number: 6958647Abstract: A feedforward amplifier. The present invention therefore provides a feedforward amplifier, comprising: a pilot reference generator that generates a pilot signal; a first carrier cancellation loop; a first error amplifier loop including a first error amplifier, wherein the pilot signal is utilized to provide gain stabilization in the first error amplifier a third loop; a second carrier cancellation loop that includes a first phase and amplitude adjuster in module and a second amplitude and phase adjuster disposed between module and module, wherein the pilot signal is utilized to control the adjustment of the second carrier cancellation loop.Type: GrantFiled: November 25, 2003Date of Patent: October 25, 2005Assignee: Powerwave Technologies, Inc.Inventors: Alex Rabinovich, Mark Gurvich, Jianquing He
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Patent number: 6952147Abstract: A microstrip coupler is provided which includes an controlled capacitance bridge for improved directivity as compared to prior art controlled capacitance bridges. The novel controlled capacitance bridge provides the functionality of prior art wire or ribbon controlled capacitance bridges and also provides the necessary capacitance to compensate for the different phase velocities of odd and even modes in the transmission lines. Both the dimensions of the controlled capacitance bridge and the dimensions of an input microstrip conductor may be adjusted to provide the appropriate level of capacitance. In some embodiments, the controlled capacitance bridge connects segments of an input microstrip conductor. In other embodiments, the controlled capacitance bridge connects microstrip conductors which are configured to couple an input signal from an input microstrip conductor.Type: GrantFiled: December 16, 2003Date of Patent: October 4, 2005Assignee: Powerwave Technologies, Inc.Inventors: Mark Gurvich, Alex Rabinovich, Jianqing He
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Patent number: 6946906Abstract: A system and method of pilot tone reuse.Type: GrantFiled: November 25, 2003Date of Patent: September 20, 2005Assignee: Powerwave Technologies, Inc.Inventors: Alex Rabinovich, Mark Gurvich, Jianqing He
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Publication number: 20050113052Abstract: A dual loop feedforward power amplifier. A dual loop feedforward power amplifier, comprising an input that provides a multicarrier signal; a first feedforward power amplifier; and a second feedforward power amplifier, wherein the first feedforward power amplifier serves as a main amplifier gain block in the second feedforward power amplifier, wherein the first feedforward power amplifier comprises a carrier cancellation loop and a first error amplifier loop, and wherein the second feedforward power amplifier comprises a third loop and a fourth loop that cancel small signal distortions that are not reduced by the first feedforward amplifier.Type: ApplicationFiled: November 25, 2003Publication date: May 26, 2005Inventors: Alex Rabinovich, Mark Gurvich, Jianqing He
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Publication number: 20050110567Abstract: A system and method of pilot tone reuse.Type: ApplicationFiled: November 25, 2003Publication date: May 26, 2005Inventors: Alex Rabinovich, Mark Gurvich, Jianqing He
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Publication number: 20050110563Abstract: A feedforward amplifier. The present invention therefore provides a feedforward amplifier, comprising: a pilot reference generator that generates a pilot signal; a first carrier cancellation loop; a first error amplifier loop including a first error amplifier, wherein the pilot signal is utilized to provide gain stabilization in the first error amplifier a third loop; a second carrier cancellation loop that includes a first phase and amplitude adjuster in module and a second amplitude and phase adjuster disposed between module and module, wherein the pilot signal is utilized to control the adjustment of the second carrier cancellation loop.Type: ApplicationFiled: November 25, 2003Publication date: May 26, 2005Inventors: Alex Rabinovich, Mark Gurvich, Jianqing He
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Patent number: 6897724Abstract: A group delay adjusting circuit. The group delay adjusting circuit comprises an electronically adjustable variable capacitance, and an electronically variable virtual inductor coupled in parallel to the electronically variable capacitance at a node.Type: GrantFiled: March 19, 2004Date of Patent: May 24, 2005Assignee: Powerware Technologies, Inc.Inventors: Mark Gurvich, Alex Rabinovich, Nikolai Maslennikov, Jianqing He
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Patent number: 6856215Abstract: A group delay adjusting circuit. The group delay adjusting circuit comprises an electronically adjustable variable capacitance, and an electronically variable virtual inductor coupled in parallel to the electronically variable capacitance at a node.Type: GrantFiled: May 20, 2002Date of Patent: February 15, 2005Assignee: Powerwave Technologies, Inc.Inventors: Mark Gurvich, Alex Rabinovich, Nikolai Maslennikov, Jianqing He
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Publication number: 20050001695Abstract: A microstrip coupler is provided which includes an controlled capacitance bridge for improved directivity as compared to prior art controlled capacitance bridges. The novel controlled capacitance bridge provides the functionality of prior art wire or ribbon controlled capacitance bridges and also provides the necessary capacitance to compensate for the different phase velocities of odd and even modes in the transmission lines. Both the dimensions of the controlled capacitance bridge and the dimensions of an input microstrip conductor may be adjusted to provide the appropriate level of capacitance. In some embodiments, the controlled capacitance bridge connects segments of an input microstrip conductor. In other embodiments, the controlled capacitance bridge connects microstrip conductors which are configured to couple an input signal from an input microstrip conductor.Type: ApplicationFiled: December 16, 2003Publication date: January 6, 2005Inventors: Mark Gurvich, Alex Rabinovich, Jianquing He
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Publication number: 20040239446Abstract: A group delay adjusting circuit. The group delay adjusting circuit comprises an electronically adjustable variable capacitance, and an electronically variable virtual inductor coupled in parallel to the electronically variable capacitance at a node.Type: ApplicationFiled: March 19, 2004Publication date: December 2, 2004Inventors: Mark Gurvich, Alex Rabinovich, Nikolai Maslennikov, Jianqing He
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Patent number: 6794954Abstract: A microstrip coupler is provided which includes an controlled capacitance bridge for improved directivity as compared to prior art controlled capacitance bridges. The novel controlled capacitance bridge provides the functionality of prior art wire or ribbon controlled capacitance bridges and also provides the necessary capacitance to compensate for the different phase velocities of odd and even modes in the transmission lines. Both the dimensions of the controlled capacitance bridge and the dimensions of an input microstrip conductor may be adjusted to provide the appropriate level of capacitance. In some embodiments, the controlled capacitance bridge connects segments of an input microstrip conductor. In other embodiments, the controlled capacitance bridge connects microstrip conductors which are configured to couple an input signal from an input microstrip conductor.Type: GrantFiled: January 11, 2002Date of Patent: September 21, 2004Assignee: Power Wave Technologies, Inc.Inventors: Mark Gurvich, Alex Rabinovich, Jianquing He
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Publication number: 20040178848Abstract: A group delay adjusting circuit. The group delay adjusting circuit comprises an electronically adjustable variable capacitance, and an electronically variable virtual inductor coupled in parallel to the electronically variable capacitance at a node.Type: ApplicationFiled: March 19, 2004Publication date: September 16, 2004Inventors: Mark Gurvich, Alex Rabinovich, Nikolai Maslennikov, Jianquing He
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Publication number: 20030132816Abstract: A microstrip coupler is provided which includes an controlled capacitance bridge for improved directivity as compared to prior art controlled capacitance bridges. The novel controlled capacitance bridge provides the functionality of prior art wire or ribbon controlled capacitance bridges and also provides the necessary capacitance to compensate for the different phase velocities of odd and even modes in the transmission lines. Both the dimensions of the controlled capacitance bridge and the dimensions of an input microstrip conductor may be adjusted to provide the appropriate level of capacitance. In some embodiments, the controlled capacitance bridge connects segments of an input microstrip conductor. In other embodiments, the controlled capacitance bridge connects microstrip conductors which are configured to couple an input signal from an input microstrip conductor.Type: ApplicationFiled: January 11, 2002Publication date: July 17, 2003Applicant: PowerwaveInventors: Mark Gurvich, Alex Rabinovich, Jianquing He
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Publication number: 20030042979Abstract: A group delay adjusting circuit. The group delay adjusting circuit comprises an electronically adjustable variable capacitance, and an electronically variable virtual inductor coupled in parallel to the electronically variable capacitance at a node.Type: ApplicationFiled: May 20, 2002Publication date: March 6, 2003Inventors: Mark Gurvich, Alex Rabinovich, Nikolai Maslennikov, Jianquing He