Patents by Inventor Vamsi Paidi

Vamsi Paidi 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: 20190173441
    Abstract: Methods and systems for a pseudo-differential low-noise amplifier at Ku-band may comprise a low-noise amplifier (LNA) integrated on a semiconductor die, where the LNA includes first and second differential pair transistors with an embedded inductor tail integrated on the semiconductor die. The embedded inductor tail may include: a first inductor with a first terminal capacitively-coupled to a gate terminal of the first differential pair transistor and a second terminal of the first inductor coupled to second, third, and fourth inductors. The second inductor may be coupled to a source terminal of the first differential pair transistor, the fourth inductor may be coupled to a source terminal of the second differential pair transistor, and the third inductor may be capacitively-coupled to a gate terminal of the second differential pair transistor and also to ground. The second inductor may be embedded within the first inductor.
    Type: Application
    Filed: February 5, 2019
    Publication date: June 6, 2019
    Inventors: Abhishek Jajoo, Vamsi Paidi
  • Publication number: 20190068227
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Application
    Filed: October 26, 2018
    Publication date: February 28, 2019
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Patent number: 10211936
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: February 19, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shantha Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Patent number: 10199998
    Abstract: Methods and systems for a pseudo-differential low-noise amplifier at Ku-band may comprise a low-noise amplifier (LNA) integrated on a semiconductor die, where the LNA includes first and second differential pair transistors with an embedded inductor tail integrated on the semiconductor die. The embedded inductor tail may include: a first inductor with a first terminal capacitively-coupled to a gate terminal of the first differential pair transistor and a second terminal of the first inductor coupled to second, third, and fourth inductors. The second inductor may be coupled to a source terminal of the first differential pair transistor, the fourth inductor may be coupled to a source terminal of the second differential pair transistor, and the third inductor may be capacitively-coupled to a gate terminal of the second differential pair transistor and also to ground. The second inductor may be embedded within the first inductor.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: February 5, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Abhishek Jajoo, Vamsi Paidi
  • Patent number: 10187096
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: January 22, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Patent number: 10181869
    Abstract: Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a receiver with a low-noise amplifier (LNA) with first and second input terminals and differential output terminals; a low pass filter operably coupled to the LNA; a high pass filter operably coupled to the second input terminal of the LNA; and a signal source input coupled to the low pass filter and the high pass filter. The LNA may be operable to receive signals in a pass band of the high pass filter and a pass band of the low pass filter. The receiver may be operable to amplify input signals in the pass band of a first filter but not signals in the pass band of the second filter by operably coupling the second to ground.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: January 15, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Raja Pullela, Wenjian Chen, Vamsi Paidi
  • Patent number: 10148300
    Abstract: Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a receiver with a low-noise amplifier (LNA) with first and second input terminals and differential output terminals; a low pass filter operably coupled to the LNA; a high pass filter operably coupled to the second input terminal of the LNA; and a signal source input coupled to the low pass filter and the high pass filter. The LNA may be operable to receive signals in a pass band of the high pass filter and a pass band of the low pass filter. The receiver may be operable to amplify input signals in the pass band of a first filter but not signals in the pass band of the second filter by operably coupling the second to ground.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: December 4, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Raja Pullela, Wenjian Chen, Vamsi Paidi
  • Publication number: 20180191357
    Abstract: Methods and systems for a sampled loop filter in a phase locked loop (PLL) may comprise a phase locked loop (PLL) comprising a phase frequency detector, a sampled loop filter comprising a plurality of capacitors and at least one switch, a plurality of voltage controlled oscillators (VCOs) coupled to said sampled loop filter, and a frequency divider. The PLL generates at least one clock signal, and the sampled loop filter samples an output signal from the phase frequency detector when an average of charge provided to a first of the plurality of capacitors in the sampled loop filter is zero. The frequency divider may be a fractional-N divider. A second switch in said sampled loop filter may have switching times that are non-overlapping with switching times of the at least one switch. Capacitors may be coupled to ground from each terminal of the second switch.
    Type: Application
    Filed: February 27, 2018
    Publication date: July 5, 2018
    Inventors: Sangeetha Gopalakrishnan, Sheng Ye, Vamsi Paidi, Raghava Manas Bachu
  • Publication number: 20180191452
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 5, 2018
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shantha Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Publication number: 20180159573
    Abstract: Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a receiver with a low-noise amplifier (LNA) with first and second input terminals and differential output terminals; a low pass filter operably coupled to the LNA; a high pass filter operably coupled to the second input terminal of the LNA; and a signal source input coupled to the low pass filter and the high pass filter. The LNA may be operable to receive signals in a pass band of the high pass filter and a pass band of the low pass filter. The receiver may be operable to amplify input signals in the pass band of a first filter but not signals in the pass band of the second filter by operably coupling the second to ground.
    Type: Application
    Filed: February 2, 2018
    Publication date: June 7, 2018
    Inventors: Raja Pullela, Wenjian Chen, Vamsi Paidi
  • Publication number: 20180159572
    Abstract: Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a receiver with a low-noise amplifier (LNA) with first and second input terminals and differential output terminals; a low pass filter operably coupled to the LNA; a high pass filter operably coupled to the second input terminal of the LNA; and a signal source input coupled to the low pass filter and the high pass filter. The LNA may be operable to receive signals in a pass band of the high pass filter and a pass band of the low pass filter. The receiver may be operable to amplify input signals in the pass band of a first filter but not signals in the pass band of the second filter by operably coupling the second to ground.
    Type: Application
    Filed: February 2, 2018
    Publication date: June 7, 2018
    Inventors: Raja Pullela, Wenjian Chen, Vamsi Paidi
  • Patent number: 9941986
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: April 10, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shanta Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Publication number: 20180091104
    Abstract: Methods and systems for a pseudo-differential low-noise amplifier at Ku-band may comprise a low-noise amplifier (LNA) integrated on a semiconductor die, where the LNA includes first and second differential pair transistors with an embedded inductor tail integrated on the semiconductor die. The embedded inductor tail may include: a first inductor with a first terminal capacitively-coupled to a gate terminal of the first differential pair transistor and a second terminal of the first inductor coupled to second, third, and fourth inductors. The second inductor may be coupled to a source terminal of the first differential pair transistor, the fourth inductor may be coupled to a source terminal of the second differential pair transistor, and the third inductor may be capacitively-coupled to a gate terminal of the second differential pair transistor and also to ground. The second inductor may be embedded within the first inductor.
    Type: Application
    Filed: November 7, 2017
    Publication date: March 29, 2018
    Inventors: Abhishek Jajoo, Vamsi Paidi
  • Patent number: 9923547
    Abstract: Methods and systems for a distributed transmission line multiplexer for a multi-core multi-mode voltage-controlled oscillator (VCO) may comprise a plurality of voltage controlled oscillators (VCOs) arranged adjacent to each other, where each of the plurality of VCOs are operable to generate an output signal at a configurable frequency, an impedance matching circuit comprising a respective driver and impedance matching elements coupled to each of the plurality of VCOs, and an output device coupled to the impedance matching circuit. The impedance matching elements may include capacitors and inductors. Between each adjacent pair of the respective drivers coupled to each of the plurality of VCOs, the impedance matching elements may include two inductors coupled in series between the drivers and a capacitor coupled to ground and to a common node between the two inductors. Impedance values of the capacitors and inductors may be configurable.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: March 20, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Wenjian Chen, Sangeetha Gopalakrishnan, Raghava Manas Bachu, Vamsi Paidi
  • Patent number: 9906227
    Abstract: Methods and systems for a sampled loop filter in a phase locked loop (PLL) may comprise a phase locked loop (PLL) comprising a phase frequency detector, a sampled loop filter comprising a plurality of capacitors and at least one switch, a plurality of voltage controlled oscillators (VCOs) coupled to said sampled loop filter, and a frequency divider. The PLL generates at least one clock signal, and the sampled loop filter samples an output signal from the phase frequency detector when an average of charge provided to a first of the plurality of capacitors in the sampled loop filter is zero. The frequency divider may be a fractional-N divider. A second switch in said sampled loop filter may have switching times that are non-overlapping with switching times of the at least one switch. Capacitors may be coupled to ground from each terminal of the second switch.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: February 27, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Sangeetha Gopalakrishnan, Sheng Ye, Vamsi Paidi
  • Patent number: 9887719
    Abstract: Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a receiver with a low-noise amplifier (LNA) with first and second input terminals and differential output terminals; a low pass filter operably coupled to the LNA; a high pass filter operably coupled to the second input terminal of the LNA; and a signal source input coupled to the low pass filter and the high pass filter. The LNA may be operable to receive signals in a pass band of the high pass filter and a pass band of the low pass filter. The receiver may be operable to amplify input signals in the pass band of a first filter but not signals in the pass band of the second filter by operably coupling the second to ground.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: February 6, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Raja Pullela, Wenjian Chen, Vamsi Paidi
  • Publication number: 20180019738
    Abstract: Aspects of methods and systems for high frequency signal selection are provided. The system for high frequency signal selection comprises a first driver and a second driver. The first driver is able to receive a first high frequency input, and the second driver is able to receive a second high frequency input. The output of the first driver is operably coupled, via a first inductive element, to a first resistive load and a first buffer, and the second driver is operably coupled, via a second inductive element, to the output of the first driver. One or both of the first high frequency input and the second high frequency input may be transferred to the first buffer by selectively enabling a current to one or both of the first driver and the second driver, respectively.
    Type: Application
    Filed: July 17, 2017
    Publication date: January 18, 2018
    Inventors: Sangeetha Gopalakrishnan, Wenjian Chen, Vamsi Paidi
  • Publication number: 20170373639
    Abstract: Methods and systems for a multi-core multi-mode voltage-controlled-oscillator (VCO) may comprise generating a plurality of oscillating signals utilizing a plurality of voltage controlled oscillators (VCOs) arranged symmetrically on an integrated circuit, where interconnects for the VCOs may be arranged in quiet zones at locations equidistant from each pair of VCOs. An interconnection ring may be centered within the arranged VCOs that comprises at least two conductive lines that couple to output terminals each VCO. The VCOs may receive control signals from interconnects coupled to at least one conductive line in the interconnection ring. The VCOs may receive control signals from a conductive line in said interconnection ring. A positive terminal of a first VCO of a pair of adjacent VCOs of the plurality of VCOs may be coupled to a same conductive line of the interconnection ring as a negative terminal of a second of the pair of adjacent VCOs.
    Type: Application
    Filed: September 8, 2017
    Publication date: December 28, 2017
    Inventors: Abhishek Jajoo, Pawan Tiwari, Vamsi Paidi
  • Patent number: 9819319
    Abstract: Methods and systems for a pseudo-differential low-noise amplifier at Ku-band may comprise a low-noise amplifier (LNA) integrated on a semiconductor die, where the LNA comprises differential pair transistors with an embedded inductor tail integrated on the semiconductor die. The embedded inductor tail may comprise: a first inductor with a first terminal capacitively-coupled to a gate terminal of a first transistor of the differential pair transistors and a second terminal of the first inductor coupled to second, third, and fourth inductors. The second inductor may be coupled to a source terminal of the first transistor of the differential pair transistors, the fourth inductor may be coupled to a source terminal of the second transistor of the differential pair transistors, and the third inductor may be capacitively-coupled to a gate terminal of the second transistor of the differential pair transistors and also to ground. The second inductor may be embedded within the first inductor.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: November 14, 2017
    Assignee: Maxlinear, Inc.
    Inventors: Abhishek Jajoo, Vamsi Paidi
  • Publication number: 20170264325
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Application
    Filed: May 31, 2017
    Publication date: September 14, 2017
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi