Patents by Inventor Rahul A. Apte
Rahul A. Apte 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).
-
Patent number: 11342796Abstract: Methods, systems, and techniques for safely controlling wireless charging in the presence of a foreign object are presented. A method includes determining a power difference between a power transmitted by a wireless charger and a power received by an electronic device, determining a level of misalignment of the electronic device with respect to the wireless charger; estimating an amount of power difference due to the level of misalignment of the electronic device with respect to the wireless charger, adjusting a power difference threshold for the wireless charger based on the estimated amount of power difference, and controlling operation of the wireless charger based on the power difference and the adjusted power difference threshold.Type: GrantFiled: September 7, 2018Date of Patent: May 24, 2022Assignee: Google LLCInventors: Qi Tian, Veera Venkata Siva Nagesh Polu, Liang Jia, Liyu Yang, Jae-won Hwang, Rahul Apte, Srikanth Lakshmikanthan, Srenik Suresh Mehta, Robert Thomas Shone
-
Patent number: 11171522Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for improving wireless charging. In some implementations, an electronic device determines a power demand of the electronic device. The electronic device includes a wireless power receiver including a wireless power receiving coil configured to receive power through inductive coupling with a wireless charge. The electronic device determines an operating voltage or operating frequency for the wireless charger based on the power demand of the electronic device. The electronic device sends, to the wireless charger, data indicating the operating voltage or operating frequency for the wireless charger.Type: GrantFiled: April 24, 2019Date of Patent: November 9, 2021Assignee: Google LLCInventors: Liang Jia, Qi Tian, Liyu Yang, Veera Venkata Siva Nagesh Polu, Srikanth Lakshmikanthan, Rahul Apte, Jae-won Hwang, Srenik Suresh Mehta
-
Publication number: 20200343777Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for improving wireless charging. In some implementations, an electronic device determines a power demand of the electronic device. The electronic device includes a wireless power receiver including a wireless power receiving coil configured to receive power through inductive coupling with a wireless charge. The electronic device determines an operating voltage or operating frequency for the wireless charger based on the power demand of the electronic device. The electronic device sends, to the wireless charger, data indicating the operating voltage or operating frequency for the wireless charger.Type: ApplicationFiled: April 24, 2019Publication date: October 29, 2020Inventors: Liang Jia, Qi Tian, Liyu Yang, Veera Venkata Siva Nagesh Polu, Srikanth Lakshmikanthan, Rahul Apte, Jae-won Hwang, Srenik Suresh Mehta
-
Publication number: 20200083754Abstract: Methods, systems, and techniques for safely controlling wireless charging in the presence of a foreign object are presented. A method includes determining a power difference between a power transmitted by a wireless charger and a power received by an electronic device, determining a level of misalignment of the electronic device with respect to the wireless charger; estimating an amount of power difference due to the level of misalignment of the electronic device with respect to the wireless charger, adjusting a power difference threshold for the wireless charger based on the estimated amount of power difference, and controlling operation of the wireless charger based on the power difference and the adjusted power difference threshold.Type: ApplicationFiled: September 7, 2018Publication date: March 12, 2020Inventors: Qi Tian, Veera Venkata Siva Nagesh Polu, Liang Jia, Liyu Yang, Jae-won Hwang, Rahul Apte, Srikanth Lakshmikanthan, Srenik Suresh Mehta, Robert Thomas Shone
-
Patent number: 8437721Abstract: A frequency synthesizer within an FM receiver employs a Phase-Locked Loop (PLL) to generate a Local Oscillator (LO) signal. The LO signal is supplied to a mixer. The FM receiver also includes jammer detection functionality. If no jammer is detected, then the loop bandwidth of the PLL is set to have a relatively high value, thereby favoring suppression of in-band residual FM. If a jammer is detected, then the loop bandwidth of the PLL is set to have a relatively low value, thereby favoring suppression of out-of-band SSB phase noise. By adaptively changing loop bandwidth depending on whether a jammer is detected, performance requirements on sub-circuits within the PLL can be relaxed while still satisfying in-band residual FM and out-of-band SSB phase noise requirements. By allowing the VCO of the PLL to generate more phase noise due to the adaptive changing of loop bandwidth, VCO power consumption can be reduced.Type: GrantFiled: April 26, 2009Date of Patent: May 7, 2013Assignee: QUALCOMM IncorporatedInventors: Yi Zeng, Tzu-wang Pan, I-Hsiang Lin, Jeremy Dunworth, Pushp Trikha, Rahul Apte
-
Patent number: 8373509Abstract: Techniques to improve low noise amplifiers (LNAs) with noise canceling are described. LNA includes a first and a second amplifier which work together to noise cancel the noise generated at an input stage circuit. The input stage circuit receives an RF signal and is characterized by a first node and a second node. The first amplifier converts a noise voltage at the first node into a first noise current at an output of the first amplifier. The second amplifier is directly coupled to the output of the first amplifier and provides noise canceling by summing the first noise current with a second noise current generated by the second amplifier as a function of the noise voltage at the second node. The proposed techniques eliminate the need for large ac coupling capacitors and reduce the die size occupied by the LNA.Type: GrantFiled: February 9, 2012Date of Patent: February 12, 2013Assignee: QUALCOMM, IncorporatedInventors: Yi Zeng, Xiaoyong Li, Rahul A Apte
-
Patent number: 8355752Abstract: A cellular telephone includes cellular telephone circuitry and an FM receiver. An FM signal being received is downconverted by a mixer. The downconverted signal is processed to generate an FM signal that is supplied to a digital IF filter. If a blocker emitted by the cellular telephone circuitry would interfere with receiving of the FM signal due to interaction of an LO harmonic with the blocker if a conventional LO frequency were used, then a different LO frequency is used. Subsequent processing of the downconverted FM signal (for example, by a digital complex conjugate selector and an IF rotator) results in the signal supplied to the digital IF filter having the same center frequency as the digital IF filter despite the use of the different LO frequency. In some embodiments, the LO is shifted by different amounts depending on cellular telephone mode and on the FM signal.Type: GrantFiled: November 2, 2009Date of Patent: January 15, 2013Assignee: QUALCOMM IncorporatedInventors: Pushp Trikha, Luca Blessent, Xiaoyong Li, Rahul A. Apte
-
Patent number: 8254849Abstract: An FM radio with a wide frequency range operates in a cell phone without interfering with the VCO of the RF transceiver. The FM transceiver generates a VCO signal whose frequency varies by less than ±7% from the midpoint of a narrow first range. A synthesizer signal is generated by dividing the VCO frequency by a first divisor such that the synthesizer frequency varies over a lower frequency second range. The VCO frequency is also divided by a second divisor such that the synthesizer frequency varies over a third range. The upper limit of the second range falls at the lower limit of the third range. The lower limit of the second range is 85.5 MHz and the upper limit of the third range is 108.0 MHz. By also using a third divisor, a synthesizer signal with a range of 76-108 MHz is generated from the narrow first frequency range.Type: GrantFiled: April 2, 2009Date of Patent: August 28, 2012Assignee: QUALCOMM IncorporatedInventors: Tzu-wang Pan, Yi Zeng, I-Hsiang Lin, Pushp K. Trikha, Jeremy D. Dunworth, Rahul Apte
-
Publication number: 20120206208Abstract: Techniques to improve low noise amplifiers (LNAs) with noise canceling are described. LNA includes a first and a second amplifier which work together to noise cancel the noise generated at an input stage circuit. The input stage circuit receives an RF signal and is characterized by a first node and a second node. The first amplifier converts a noise voltage at the first node into a first noise current at an output of the first amplifier. The second amplifier is directly coupled to the output of the first amplifier and provides noise canceling by summing the first noise current with a second noise current generated by the second amplifier as a function of the noise voltage at the second node. The proposed techniques eliminate the need for large ac coupling capacitors and reduce the die size occupied by the LNA.Type: ApplicationFiled: February 9, 2012Publication date: August 16, 2012Applicant: QUALCOMM INCORPORATEDInventors: Yi Zeng, Xiaoyong Li, Rahul A. Apte
-
Patent number: 8138835Abstract: Techniques to improve low noise amplifiers (LNAs) with noise canceling are described. LNA includes a first and a second amplifier which work together to noise cancel the noise generated at an input stage circuit. The input stage circuit receives an RF signal and is characterized by a first node and a second node. The first amplifier converts a noise voltage at the first node into a first noise current at an output of the first amplifier. The second amplifier is directly coupled to the output of the first amplifier and provides noise canceling by summing the first noise current with a second noise current generated by the second amplifier as a function of the noise voltage at the second node. The proposed techniques eliminate the need for large ac coupling capacitors and reduce the die size occupied by the LNA. The elimination of ac coupling capacitors between amplification stages of the LNA allows current reuse resulting in reduced current consumption.Type: GrantFiled: June 8, 2010Date of Patent: March 20, 2012Assignee: QUALCOMM, IncorporatedInventors: Yi Zeng, Xiaoyong Li, Rahul A Apte
-
Publication number: 20110193635Abstract: Techniques to improve low noise amplifiers (LNAs) with noise canceling are described. LNA includes a first and a second amplifier which work together to noise cancel the noise generated at an input stage circuit. The input stage circuit receives an RF signal and is characterized by a first node and a second node. The first amplifier converts a noise voltage at the first node into a first noise current at an output of the first amplifier. The second amplifier is directly coupled to the output of the first amplifier and provides noise canceling by summing the first noise current with a second noise current generated by the second amplifier as a function of the noise voltage at the second node. The proposed techniques eliminate the need for large ac coupling capacitors and reduce the die size occupied by the LNA. The elimination of ac coupling capacitors between amplification stages of the LNA allows current reuse resulting in reduced current consumption.Type: ApplicationFiled: June 8, 2010Publication date: August 11, 2011Applicant: QUALCOMM INCORPORATEDInventors: Yi Zeng, Xiaoyong Li, Rahul A. Apte
-
Patent number: 7902923Abstract: Techniques for integrating a common-source and common-gate amplifier topology in a single amplifier design. In one aspect, an input voltage is provided to both a common-source amplifier and a common-gate amplifier. The output voltages of the common-source amplifier and the common-gate amplifier are provided to a difference block for generating a single-ended voltage proportional to the difference between the output voltages. When applied to the design of, e.g., low-noise amplifiers (LNA's), the disclosed techniques may offer improved noise performance over the prior art.Type: GrantFiled: March 19, 2009Date of Patent: March 8, 2011Assignee: QUALCOMM, IncorporatedInventors: Xiaoyong Li, Rahul A. Apte
-
Publication number: 20110009161Abstract: A cellular telephone includes cellular telephone circuitry and an FM receiver. An FM signal being received is downconverted by a mixer. The downconverted signal is processed to generate an FM signal that is supplied to a digital IF filter. If a blocker emitted by the cellular telephone circuitry would interfere with receiving of the FM signal due to interaction of an LO harmonic with the blocker if a conventional LO frequency were used, then a different LO frequency is used. Subsequent processing of the downconverted FM signal (for example, by a digital complex conjugate selector and an IF rotator) results in the signal supplied to the digital IF filter having the same center frequency as the digital IF filter despite the use of the different LO frequency. In some embodiments, the LO is shifted by different amounts depending on cellular telephone mode and on the FM signal.Type: ApplicationFiled: November 2, 2009Publication date: January 13, 2011Applicant: QUALCOMM IncorporatedInventors: Pushp Trikha, Luca Blessent, Xiaoyong Li, Rahul A. Apte
-
Publication number: 20100273442Abstract: A frequency synthesizer within an FM receiver employs a Phase-Locked Loop (PLL) to generate a Local Oscillator (LO) signal. The LO signal is supplied to a mixer. The FM receiver also includes jammer detection functionality. If no jammer is detected, then the loop bandwidth of the PLL is set to have a relatively high value, thereby favoring suppression of in-band residual FM. If a jammer is detected, then the loop bandwidth of the PLL is set to have a relatively low value, thereby favoring suppression of out-of-band SSB phase noise. By adaptively changing loop bandwidth depending on whether a jammer is detected, performance requirements on sub-circuits within the PLL can be relaxed while still satisfying in-band residual FM and out-of-band SSB phase noise requirements. By allowing the VCO of the PLL to generate more phase noise due to the adaptive changing of loop bandwidth, VCO power consumption can be reduced.Type: ApplicationFiled: April 26, 2009Publication date: October 28, 2010Applicant: QUALCOMM IncorporatedInventors: Yi Zeng, Tzu-wang Pan, I-Hsiang Lin, Jeremy Dunworth, Pushp Trikha, Rahul Apte
-
Publication number: 20100255802Abstract: An FM radio with a wide frequency range operates in a cell phone without interfering with the VCO of the RF transceiver. The FM transceiver generates a VCO signal whose frequency varies by less than ±7% from the midpoint of a narrow first range. A synthesizer signal is generated by dividing the VCO frequency by a first divisor such that the synthesizer frequency varies over a lower frequency second range. The VCO frequency is also divided by a second divisor such that the synthesizer frequency varies over a third range. The upper limit of the second range falls at the lower limit of the third range. The lower limit of the second range is 85.5 MHz and the upper limit of the third range is 108.0 MHz. By also using a third divisor, a synthesizer signal with a range of 76-108 MHz is generated from the narrow first frequency range.Type: ApplicationFiled: April 2, 2009Publication date: October 7, 2010Applicant: QUALCOMM IncorporatedInventors: Tzu-wang Pan, Yi Zeng, I-Hsiang Lin, Pushp K. Trikha, Jeremy D. Dunworth, Rahul Apte
-
Publication number: 20100237942Abstract: Techniques for integrating a common-source and common-gate amplifier topology in a single amplifier design. In one aspect, an input voltage is provided to both a common-source amplifier and a common-gate amplifier. The output voltages of the common-source amplifier and the common-gate amplifier are provided to a difference block for generating a single-ended voltage proportional to the difference between the output voltages. When applied to the design of, e.g., low-noise amplifiers (LNA's), the disclosed techniques may offer improved noise performance over the prior art.Type: ApplicationFiled: March 19, 2009Publication date: September 23, 2010Applicant: QUALCOMM INCORPORATEDInventors: Xiaoyong Li, Rahul A. Apte