Patents by Inventor Hemangi U. Gajjewar

Hemangi U. Gajjewar 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: 11258446
    Abstract: Systems, apparatuses, and methods for implementing a high-performance clock-gating circuit are described. A first pull-down stack receives enable and pulse signals on gates of N-type transistors which pull down an output node when the enable and pulse signals are both high. A pull-up transistor coupled to the output node receives a clock signal which turns off the pull-up transistor when the clock signal is high. A first pull-up stack receives the inverted pulse signal and the enable signal on gates of P-type transistors to cause the output node to be high when the enable signal and inverted pulse signal are low. A second pull-up stack maintains a high voltage on the output node after the pulse event has ended but while the clock signal is still high. A second pull-down stack maintains a low voltage on the output node after the pulse event but while the clock remains high.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: February 22, 2022
    Assignee: Apple Inc.
    Inventors: Vivekanandan Venugopal, Shuyan Lei, Wenhao Li, Hemangi U. Gajjewar
  • Publication number: 20210344344
    Abstract: Systems, apparatuses, and methods for implementing a high-performance clock-gating circuit are described. A first pull-down stack receives enable and pulse signals on gates of N-type transistors which pull down an output node when the enable and pulse signals are both high. A pull-up transistor coupled to the output node receives a clock signal which turns off the pull-up transistor when the clock signal is high. A first pull-up stack receives the inverted pulse signal and the enable signal on gates of P-type transistors to cause the output node to be high when the enable signal and inverted pulse signal are low. A second pull-up stack maintains a high voltage on the output node after the pulse event has ended but while the clock signal is still high. A second pull-down stack maintains a low voltage on the output node after the pulse event but while the clock remains high.
    Type: Application
    Filed: April 29, 2020
    Publication date: November 4, 2021
    Inventors: Vivekanandan Venugopal, Shuyan Lei, Wenhao Li, Hemangi U. Gajjewar
  • Patent number: 10908663
    Abstract: A power switch multiplexer with configurable overlap is disclosed. An integrated circuit (IC) includes a first functional circuit block coupled to receive a supply voltage from a first supply voltage node. The IC further includes an input circuit and an output circuit. Responsive to receiving an input signal, the input circuit asserts an activation signal to cause one of a second supply voltage node and a third supply voltage node to be electrically coupled to the first supply voltage node. Subsequently the input circuit asserts a deactivation signal to cause the other one of the second and third supply voltage nodes to be electrically decoupled from the first supply voltage node. The output circuit is coupled to receive the activation signal and the deactivation signal, and configured to assert a first output signal subsequent to receiving the activation signal.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: February 2, 2021
    Assignee: Apple Inc.
    Inventors: Victor Zyuban, Greg M. Hess, Hemangi U. Gajjewar
  • Publication number: 20200387205
    Abstract: A power switch multiplexer with configurable overlap is disclosed. An integrated circuit (IC) includes a first functional circuit block coupled to receive a supply voltage from a first supply voltage node. The IC further includes an input circuit and an output circuit. Responsive to receiving an input signal, the input circuit asserts an activation signal to cause one of a second supply voltage node and a third supply voltage node to be electrically coupled to the first supply voltage node. Subsequently the input circuit asserts a deactivation signal to cause the other one of the second and third supply voltage nodes to be electrically decoupled from the first supply voltage node. The output circuit is coupled to receive the activation signal and the deactivation signal, and configured to assert a first output signal subsequent to receiving the activation signal.
    Type: Application
    Filed: June 6, 2019
    Publication date: December 10, 2020
    Inventors: Victor Zyuban, Greg M. Hess, Hemangi U. Gajjewar
  • Patent number: 10833664
    Abstract: An apparatus for delaying a signal transition is disclosed. The apparatus includes a first circuit coupled to a first power supply signal and a second, different power supply signal. The first circuit may be configured to, based on a voltage level of a logic signal, sink a current from an intermediate circuit node. A value of the current may be based upon a voltage level of the second different power supply signal. The apparatus also includes a second circuit coupled to the first power supply signal. The second circuit may be configured to generate an output signal based upon a voltage level of the intermediate circuit node. An amount of time between a transition of the logic signal and a corresponding transition of the output signal may be based on an amount of the current.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: November 10, 2020
    Assignee: Apple Inc.
    Inventors: Greg M. Hess, Hemangi U. Gajjewar, Sachmanik Cheema
  • Patent number: 10453505
    Abstract: An apparatus is disclosed, including a plurality of memory cells, in which a given memory cell is coupled to a true bit line, a complement bit line, and a power supply signal. The apparatus also includes a pre-charge circuit that is configured to charge, for a first duration, the true bit line and the complement bit line to a voltage level that is less than a voltage level of the power supply signal. The pre-charge circuit is also configured to maintain, for a second duration that is longer than the first duration, the voltage level on the true bit line and the complement bit line.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: October 22, 2019
    Assignee: Apple Inc.
    Inventors: Greg M. Hess, Hemangi U. Gajjewar
  • Publication number: 20190272859
    Abstract: An apparatus is disclosed, including a plurality of memory cells, in which a given memory cell is coupled to a true bit line, a complement bit line, and a power supply signal. The apparatus also includes a pre-charge circuit that is configured to charge, for a first duration, the true bit line and the complement bit line to a voltage level that is less than a voltage level of the power supply signal. The pre-charge circuit is also configured to maintain, for a second duration that is longer than the first duration, the voltage level on the true bit line and the complement bit line.
    Type: Application
    Filed: March 5, 2018
    Publication date: September 5, 2019
    Inventors: Greg M. Hess, Hemangi U. Gajjewar
  • Publication number: 20190052254
    Abstract: An apparatus for delaying a signal transition is disclosed. The apparatus includes a first circuit coupled to a first power supply signal and a second, different power supply signal. The first circuit may be configured to, based on a voltage level of a logic signal, sink a current from an intermediate circuit node. A value of the current may be based upon a voltage level of the second different power supply signal. The apparatus also includes a second circuit coupled to the first power supply signal. The second circuit may be configured to generate an output signal based upon a voltage level of the intermediate circuit node. An amount of time between a transition of the logic signal and a corresponding transition of the output signal may be based on an amount of the current.
    Type: Application
    Filed: August 14, 2017
    Publication date: February 14, 2019
    Inventors: Greg M. Hess, Hemangi U. Gajjewar, Sachmanik Cheema