Patents by Inventor Milad Darvishi

Milad Darvishi 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: 20240063771
    Abstract: An electronic device includes multiple antennas to transmit one or more signals, and a transceiver electrically coupled to the antennas. A transmitter of the transceiver may include splitter circuitry with reduced circuit area that may receive an input signal and generates multiple signals. Moreover, a receiver of the transceiver may include combiner circuitry with reduced circuit area that may receive multiple input signal and generates one output signal. The splitter and/or combiner may include combined circuitry including one or more inductors and resistors to provide a desired total impedance. Moreover, in different embodiments, the splitter and/or combiner may have different number of input or output ports.
    Type: Application
    Filed: August 18, 2022
    Publication date: February 22, 2024
    Inventors: Milad Darvishi, Zhengan Yang
  • Patent number: 11909370
    Abstract: An electronic device may include wireless circuitry having an LC filter. The LC filter may include first and second series inductors coupled between the input and output of the LC filter. An input capacitor can be coupled at the input of the LC filter, and an output capacitor can be coupled at the output of the LC filter. Feedforward capacitors can be cross-coupled with the first and second series inductors to at least partially or fully cancel out any parasitic capacitance associated with the first and second series inductors to mitigate any undesired self-resonant effects associated with the series inductors.
    Type: Grant
    Filed: June 2, 2022
    Date of Patent: February 20, 2024
    Assignee: Apple Inc.
    Inventor: Milad Darvishi
  • Publication number: 20230396226
    Abstract: An electronic device may include wireless circuitry having an LC filter. The LC filter may include first and second series inductors coupled between the input and output of the LC filter. An input capacitor can be coupled at the input of the LC filter, and an output capacitor can be coupled at the output of the LC filter. Feedforward capacitors can be cross-coupled with the first and second series inductors to at least partially or fully cancel out any parasitic capacitance associated with the first and second series inductors to mitigate any undesired self-resonant effects associated with the series inductors.
    Type: Application
    Filed: June 2, 2022
    Publication date: December 7, 2023
    Inventor: Milad Darvishi
  • Publication number: 20230378927
    Abstract: An electronic device includes multiple antennas to transmit one or more signals, and a transmitter electrically coupled to the antennas. The transmitter has splitter circuitry that receives an input signal and generates the signals. The splitter circuitry includes a pair of inductive elements that are inductively coupled together. The splitter circuitry includes capacitive elements to absorb parasitic input and output capacitance. In additional or alternative embodiments, the splitter circuitry may be in the form of combiner circuitry and disposed in a receiver of the electronic device.
    Type: Application
    Filed: May 17, 2022
    Publication date: November 23, 2023
    Inventor: Milad Darvishi
  • Publication number: 20230350443
    Abstract: An electronic device may include wireless circuitry having digital-to-analog converters, filters, mixers, and current buffers disposed between the filters and the mixers. The current buffers may provide proper resistance termination for the filters. The current buffers may include current mirrors formed from diode-connected n-type transistors and diode-connected p-type transistors, which collectively provide a linear input resistance. The current mirrors may receive a high voltage from a voltage regulator having a replica current mirror and proportional-to-absolute-temperature current sources.
    Type: Application
    Filed: May 2, 2022
    Publication date: November 2, 2023
    Inventors: Milad Darvishi, Georgios Palaskas
  • Patent number: 10396748
    Abstract: A linear, low noise, high quality factor (Q) and widely tunable notch filter circuit includes one or more first reactive elements coupled between a first filter node and a first node. The notch filter circuit further includes a multi-branch circuit having multiple parallel branches and coupled between the first node and a second node. Each branch of the multi-branch circuit includes at least a switch coupled to a variable capacitor. A notch frequency of the notch filter circuit is tunable by adjusting a capacitance of the variable capacitor.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: August 27, 2019
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Milad Darvishi, Hooman Darabi, Arya Reza Behzad
  • Publication number: 20190109575
    Abstract: A linear, low noise, high quality factor (Q) and widely tunable notch filter circuit includes one or more first reactive elements coupled between a first filter node and a first node. The notch filter circuit further includes a multi-branch circuit having multiple parallel branches and coupled between the first node and a second node. Each branch of the multi-branch circuit includes at least a switch coupled to a variable capacitor. A notch frequency of the notch filter circuit is tunable by adjusting a capacitance of the variable capacitor.
    Type: Application
    Filed: October 11, 2017
    Publication date: April 11, 2019
    Inventors: Milad DARVISHI, Hooman DARABI, Arya Reza BEHZAD
  • Patent number: 10128819
    Abstract: Certain aspects of the present disclosure provide an N-path filter implemented using a generalized impedance converter (GIC) circuit. The GIC circuit is configured such that the N-path filter has a desired frequency response, which may include a wide passband with steeper rejection than a conventional N-path filter with only a single pole in each filter path. Certain aspects of the present disclosure provide an N-path filter having a frequency response with multiple concurrent passbands. In certain aspects, the N-path filter with multiple passbands is implemented using the GIC circuit. In other aspects, the N-path filter may include a bandpass response circuit where an inductance of the bandpass response circuit may be implemented using gyrators.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: November 13, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Hajir Hedayati, Milad Darvishi, Jeremy Darren Dunworth, Faramarz Sabouri
  • Patent number: 9847772
    Abstract: Certain aspects of the present disclosure provide N-path filters with wider passbands and steeper rejection than conventional N-path filters with only a single pole in each filter path. These N-path filters also have a flatter passband with decreased passband droop. One example N-path filter generally includes a plurality of branches selectively connected with a common node, each branch of the N-path filter comprising a switch connected in series with an impedance comprising a common drain amplifier circuit. In certain aspects, the amplifier circuit may include a degeneration circuit for stability and/or a poly-phase feedback circuit to reduce in-band peaking.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: December 19, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Milad Darvishi, Hajir Hedayati, Faramarz Sabouri
  • Patent number: 9800280
    Abstract: A radio frequency (RF) receiver device may include a receive path including a first amplifier. The device also includes a first mixer coupled to an output of the first amplifier and to an input of a second amplifier. Further, the device may include an auxiliary path including a second mixer coupled between an output of the first mixer and an input of the first mixer.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: October 24, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Hajir Hedayati, Milad Darvishi, Jeremy Dunworth
  • Publication number: 20170222628
    Abstract: Certain aspects of the present disclosure provide N-path filters with wider passbands and steeper rejection than conventional N-path filters with only a single pole in each filter path. These N-path filters also have a flatter passband with decreased passband droop. One example N-path filter generally includes a plurality of branches selectively connected with a common node, each branch of the N-path filter comprising a switch connected in series with an impedance comprising a common drain amplifier circuit. In certain aspects, the amplifier circuit may include a degeneration circuit for stability and/or a poly-phase feedback circuit to reduce in-band peaking.
    Type: Application
    Filed: February 3, 2016
    Publication date: August 3, 2017
    Inventors: Milad DARVISHI, Hajir HEDAYATI, Faramarz SABOURI
  • Publication number: 20170214391
    Abstract: Certain aspects of the present disclosure provide an N-path filter implemented using a generalized impedance converter (GIC) circuit. The GIC circuit is configured such that the N-path filter has a desired frequency response, which may include a wide passband with steeper rejection than a conventional N-path filter with only a single pole in each filter path. Certain aspects of the present disclosure provide an N-path filter having a frequency response with multiple concurrent passbands. In certain aspects, the N-path filter with multiple passbands is implemented using the GIC circuit. In other aspects, the N-path filter may include a bandpass response circuit where an inductance of the bandpass response circuit may be implemented using gyrators.
    Type: Application
    Filed: January 21, 2016
    Publication date: July 27, 2017
    Inventors: Hajir HEDAYATI, Milad DARVISHI, Jeremy Darren DUNWORTH, Faramarz SABOURI
  • Publication number: 20170201280
    Abstract: A radio frequency (RF) receiver device may include a receive path including a first amplifier. The device also includes a first mixer coupled to an output of the first amplifier and to an input of a second amplifier. Further, the device may include an auxiliary path including a second mixer coupled between an output of the first mixer and an input of the first mixer.
    Type: Application
    Filed: June 7, 2016
    Publication date: July 13, 2017
    Inventors: Hajir HEDAYATI, Milad DARVISHI, Jeremy DUNWORTH
  • Patent number: 9692470
    Abstract: An apparatus includes a low noise amplifier (LNA) having an input configured to receive a radio frequency signal. The apparatus also includes a notch filter coupled to an input of the LNA. The notch filter is configured to attenuate the radio frequency signal at a notch frequency.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: June 27, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Hajir Hedayati, Milad Darvishi, Li-Chung Chang
  • Publication number: 20170063414
    Abstract: An apparatus includes a low noise amplifier (LNA) having an input configured to receive a radio frequency signal. The apparatus also includes a notch filter coupled to an input of the LNA. The notch filter is configured to attenuate the radio frequency signal at a notch frequency.
    Type: Application
    Filed: August 25, 2015
    Publication date: March 2, 2017
    Inventors: Hajir Hedayati, Milad Darvishi, Li-Chung Chang