Patents by Inventor Aleksandar Tasic
Aleksandar Tasic 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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Publication number: 20140105336Abstract: An exemplary embodiment disclosed comprises a mixer having a plurality of input leads; a first degenerative impedance element coupled to a first input lead of the mixer; a second degenerative impedance element coupled to a second input lead of the mixer; and a local oscillator (LO) system comprising a plurality of duty cycle modes to generate a LO signal for the mixer, the local oscillator system operates in a first duty cycle based on a first gain state of the mixer, and in a second duty cycle based on a second gain state of the mixer.Type: ApplicationFiled: December 18, 2013Publication date: April 17, 2014Applicant: QUALCOMM INCORPORATEDInventors: Junxiong Deng, Aristotele Hadjichristos, Aleksandar Tasic, Fredric Bossu
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Patent number: 8639205Abstract: An exemplary embodiment disclosed comprises a mixer having a plurality of input leads; a first degenerative impedance element coupled to a first input lead of the mixer; a second degenerative impedance element coupled to a second input lead of the mixer; and a local oscillator (LO) system comprising a plurality of duty cycle modes to generate a LO signal for the mixer, the local oscillator system operates in a first duty cycle based on a first gain state of the mixer, and in a second duty cycle based on a second gain state of the mixer.Type: GrantFiled: March 20, 2008Date of Patent: January 28, 2014Assignee: QUALCOMM IncorporatedInventors: Junxiong Deng, Aristotele Hadjichristos, Aleksandar Tasic, Frederic Bossu
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Patent number: 8633777Abstract: An integrated circuit is described. The integrated circuit includes an inductor that has a large empty area in the center of the inductor. The integrated circuit also includes additional circuitry. The additional circuitry is located within the large empty area in the center of the inductor. The additional circuitry may include a capacitor bank, transistors, electrostatic discharge (ESD) protection circuitry and other miscellaneous passive or active circuits.Type: GrantFiled: December 1, 2009Date of Patent: January 21, 2014Assignee: QUALCOMM IncorporatedInventors: Zhang Jin, Aristotele Hadjichristos, Ockgoo Lee, Hongyan Yan, Guy Klemens, Maulin P. Bhagat, Thomas Myers, Norman L. Frederick, Junxiong Deng, Aleksandar Tasic, Bhushan S. Asuri, Mohammad Farazian
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Patent number: 8351978Abstract: A circuit is described. The circuit includes a low noise amplifier (LNA), a passive switching core (PSC), a transimpedance amplifier filter (TIA-filter) and a degenerative-impedance gain-tuning network (Zdeg network) having a first Zdeg network input lead, a second Zdeg network input lead, a first Zdeg network output lead and a second Zdeg network output lead, wherein the first Zdeg network input lead is coupled to a first output lead of the LNA and the second Zdeg network input lead is coupled to a second output lead of the LNA, and wherein the first Zdeg network output lead is coupled to a first signal input lead of the PSC and the second Zdeg network output lead is coupled to a second signal input lead of the PSC. The LNA, the Zdeg network, the PSC, and the TIA-filter together form a receiver. A receiver gain is adjusted by the Zdeg network.Type: GrantFiled: August 1, 2008Date of Patent: January 8, 2013Inventors: Aleksandar Tasic, Christian Holenstein, Junxiong Deng
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Patent number: 8102213Abstract: A multi-mode low noise amplifier (LNA) with transformer source degeneration is described. In an exemplary design, the multi-mode LNA includes first, second, and third transistors and first and second inductors. The first transistor has its source coupled to the first inductor, amplifies an input signal, and provides a first amplified signal in a first mode. The second transistor has its source coupled to the second inductor, amplifies the input signal, and provides a second amplified signal in a second mode. The third transistor has its source coupled to the second inductor. The first and third transistors receive the input signal and conduct current through the first and second inductors, respectively, in a third mode. The first transistor observes source degeneration from a transformer formed by the first and second inductors, amplifies the input signal, and provides a third amplified signal in the third mode.Type: GrantFiled: September 23, 2009Date of Patent: January 24, 2012Assignee: QUALCOMM, IncorporatedInventors: Aleksandar Tasic, Junxiong Deng, Zhang Jin
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Publication number: 20110128084Abstract: An integrated circuit is described. The integrated circuit includes an inductor that has a large empty area in the center of the inductor. The integrated circuit also includes additional circuitry. The additional circuitry is located within the large empty area in the center of the inductor. The additional circuitry may include a capacitor bank, transistors, electrostatic discharge (ESD) protection circuitry and other miscellaneous passive or active circuits.Type: ApplicationFiled: December 1, 2009Publication date: June 2, 2011Applicant: QUALCOMM IncorporatedInventors: Jean Jin, Aristotele Hadjichristos, Ockgoo Lee, Hongyan Yan, Guy Klemens, Maulin P. Bhagat, Thomas Myers, Norman L. Frederick, Junxiong Deng, Aleksandar Tasic, Bhushan S. Asuri, Mohammad Farazian
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Patent number: 7899426Abstract: In a SAW-less receiver involving a passive mixer, novel degenerative impedance elements having substantial impedances are disposed in incoming signal paths between the differential signal output leads of a low-noise amplifier (LNA) and the differential signal input leads of the passive mixer. The passive mixer outputs signals to a transimpedance amplifier and baseband filter (TIA). Providing the novel degenerative impedance elements decreases noise in the overall receiver as output from the TIA, with only minimal degradation of other receiver performance characteristics. In some examples, the passive mixer receives local oscillator signals having duty cycles of substantially less than fifty percent. In some examples, the degenerative impedance elements can have one of several impedances.Type: GrantFiled: November 7, 2007Date of Patent: March 1, 2011Assignee: QUALCOMM IncorporatedInventors: Aleksandar Tasic, Junxiong Deng, Namsoo Kim
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Publication number: 20110018635Abstract: A multi-mode low noise amplifier (LNA) with transformer source degeneration is described. In an exemplary design, the multi-mode LNA includes first, second, and third transistors and first and second inductors. The first transistor has its source coupled to the first inductor, amplifies an input signal, and provides a first amplified signal in a first mode. The second transistor has its source coupled to the second inductor, amplifies the input signal, and provides a second amplified signal in a second mode. The third transistor has its source coupled to the second inductor. The first and third transistors receive the input signal and conduct current through the first and second inductors, respectively, in a third mode. The first transistor observes source degeneration from a transformer formed by the first and second inductors, amplifies the input signal, and provides a third amplified signal in the third mode.Type: ApplicationFiled: September 23, 2009Publication date: January 27, 2011Applicant: QUALCOMM INCORPORATEDInventors: Aleksandar Tasic, Junxiong Deng, Zhang Jin
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Publication number: 20100029323Abstract: A circuit is described. The circuit includes a low noise amplifier (LNA), a passive switching core (PSC), a transimpedance amplifier filter (TIA-filter) and a degenerative-impedance gain-tuning network (Zdeg network) having a first Zdeg network input lead, a second Zdeg network input lead, a first Zdeg network output lead and a second Zdeg network output lead, wherein the first Zdeg network input lead is coupled to a first output lead of the LNA and the second Zdeg network input lead is coupled to a second output lead of the LNA, and wherein the first Zdeg network output lead is coupled to a first signal input lead of the PSC and the second Zdeg network output lead is coupled to a second signal input lead of the PSC. The LNA, the Zdeg network, the PSC, and the TIA-filter together form a receiver. A receiver gain is adjusted by the Zdeg network.Type: ApplicationFiled: August 1, 2008Publication date: February 4, 2010Applicant: QUALCOMM IncorporatedInventors: Aleksandar Tasic, Christian Holenstein, Junxiong Deng
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Publication number: 20090239592Abstract: An exemplary embodiment disclosed comprises a mixer having a plurality of input leads; a first degenerative impedance element coupled to a first input lead of the mixer; a second degenerative impedance element coupled to a second input lead of the mixer; and a local oscillator (LO) system comprising a plurality of duty cycle modes to generate a LO signal for the mixer, the local oscillator system operates in a first duty cycle based on a first gain state of the mixer, and in a second duty cycle based on a second gain state of the mixer.Type: ApplicationFiled: March 20, 2008Publication date: September 24, 2009Applicant: QUALCOMM INCORPORATEDInventors: Junxiong Deng, Aristotele Hadjichristos, Aleksandar Tasic, Frederic Bossu
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Publication number: 20090111420Abstract: In a SAW-less receiver involving a passive mixer, novel degenerative impedance elements having substantial impedances are disposed in incoming signal paths between the differential signal output leads of a low-noise amplifier (LNA) and the differential signal input leads of the passive mixer. The passive mixer outputs signals to a transimpedance amplifier and baseband filter (TIA). Providing the novel degenerative impedance elements decreases noise in the overall receiver as output from the TIA, with only minimal degradation of other receiver performance characteristics. In some examples, the passive mixer receives local oscillator signals having duty cycles of substantially less than fifty percent. In some examples, the degenerative impedance elements can have one of several impedances.Type: ApplicationFiled: November 7, 2007Publication date: April 30, 2009Applicant: QUALCOMM INCORPORATEDInventors: Aleksandar Tasic, Junxiong Deng, Namsoo Kim