Patents by Inventor Shafqat Ali

Shafqat Ali 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: 11922244
    Abstract: In accordance with a first aspect of the present disclosure, a storage device is provided, comprising: a capacitor configured to be charged; a charge circuit configured to charge said capacitor; a pass device coupled between the charge circuit and the capacitor; a control circuit configured to control said pass device; a photosensitive diode coupled between the control circuit and the pass device, such that an input voltage provided by the control circuit to the pass device is reduced if the storage device is exposed to light. In accordance with a second aspect of the present disclosure, a corresponding method of producing a storage device is conceived.
    Type: Grant
    Filed: June 22, 2022
    Date of Patent: March 5, 2024
    Assignee: NXP B.V.
    Inventors: Frank Zachariasse, Slawomir Rafal Malinowski, Egas Carvalho Henes Neto, Shafqat Ali
  • Publication number: 20230004770
    Abstract: In accordance with a first aspect of the present disclosure, a storage device is provided, comprising: a capacitor configured to be charged; a charge circuit configured to charge said capacitor; a pass device coupled between the charge circuit and the capacitor; a control circuit configured to control said pass device; a photosensitive diode coupled between the control circuit and the pass device, such that an input voltage provided by the control circuit to the pass device is reduced if the storage device is exposed to light. In accordance with a second aspect of the present disclosure, a corresponding method of producing a storage device is conceived.
    Type: Application
    Filed: June 22, 2022
    Publication date: January 5, 2023
    Inventors: Frank Zachariasse, Slawomir Rafal Malinowski, Egas Carvalho Henes Neto, Shafqat Ali
  • Patent number: 10749436
    Abstract: A switched-mode power converter and a method for operation is presented. The switched-mode power converter has a high side switching element, a low side switching element, and an inductor. Both the high side switching element and the low side switching element are coupled to an input terminal of the inductor. A zero cross comparator generates a trigger signal for opening the low side switching element. A sampling unit samples, at a time when the low side switching element is switching, an inductor voltage at the input terminal of the inductor. An integrating unit determines an offset voltage by integrating the sampled inductor voltage. Finally, an input voltage of the zero cross comparator is adjusted by subtracting the determined offset voltage from the inductor voltage. As a result, the switching behavior of the switched-mode power converter is optimized.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: August 18, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Shafqat Ali
  • Publication number: 20190214914
    Abstract: A switched-mode power converter and a method for operation is presented. The switched-mode power converter has a high side switching element, a low side switching element, and an inductor. Both the high side switching element and the low side switching element are coupled to an input terminal of the inductor. A zero cross comparator generates a trigger signal for opening the low side switching element. A sampling unit samples, at a time when the low side switching element is switching, an inductor voltage at the input terminal of the inductor. An integrating unit determines an offset voltage by integrating the sampled inductor voltage. Finally, an input voltage of the zero cross comparator is adjusted by subtracting the determined offset voltage from the inductor voltage. As a result, the switching behavior of the switched-mode power converter is optimized.
    Type: Application
    Filed: January 9, 2018
    Publication date: July 11, 2019
    Inventor: Shafqat Ali
  • Patent number: 10181843
    Abstract: Circuitry for controlling a non-overlap time for a first switch and a second switch is described. Within a first state, the first switch is closed and the second switch is open, and within a second state, the first switch is open and the second switch is closed. The control circuitry has a first auxiliary switch and a second auxiliary switch. The control circuitry determines whether during a transition from the first state to the second state a current has flown through the serial arrangement of the first and second auxiliary switches. The control means adapts a non-overlap time between the first and second control signals for controlling a following transition from the first state to the second state, dependent on whether during said transition between the first and second states a current has flown through the serial arrangement of the first and second auxiliary switches.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: January 15, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Shafqat Ali
  • Publication number: 20180294804
    Abstract: Circuitry for controlling a non-overlap time for a first switch and a second switch is described. Within a first state, the first switch is closed and the second switch is open, and within a second state, the first switch is open and the second switch is closed. The control circuitry has a first auxiliary switch and a second auxiliary switch. The control circuitry determines whether during a transition from the first state to the second state a current has flown through the serial arrangement of the first and second auxiliary switches. The control means adapts a non-overlap time between the first and second control signals for controlling a following transition from the first state to the second state, dependent on whether during said transition between the first and second states a current has flown through the serial arrangement of the first and second auxiliary switches.
    Type: Application
    Filed: November 15, 2017
    Publication date: October 11, 2018
    Inventor: Shafqat Ali
  • Patent number: 10056838
    Abstract: This application relates to a power converter circuit for converting a supply voltage received at an input node and providing, at an output node, a current at the converted supply voltage. The power converter circuit contains a DC-DC converter circuit for generating the current at the output node under control of a control signal, a current sensing circuit for sensing a current indicative of a current at the input node, a voltage adjustment circuit for sensing a voltage indicative of the supply voltage and generating an adjusted voltage on the basis of the sensed voltage and the sensed current, and an error amplifier stage for generating the control signal on the basis of the adjusted voltage and a reference voltage. The application further relates to a method of operating such power converter circuit.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: August 21, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Shafqat Ali
  • Patent number: 9998107
    Abstract: This application relates to an active diode circuit for letting current pass in one direction and blocking current in the opposite direction. The active diode circuit comprises a transistor, a control voltage generation circuit for generating a control voltage that is supplied to a control terminal of the transistor, and a sensing circuit for detecting a quantity indicative of a current flowing through the transistor. The control voltage generation circuit generates the control voltage in dependence on the detected quantity. The application further relates to a method of controlling a transistor to function as an active diode so that current may pass in one direction and is blocked in the opposite direction.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: June 12, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Shafqat Ali
  • Publication number: 20170353178
    Abstract: This application relates to an active diode circuit for letting current pass in one direction and blocking current in the opposite direction. The active diode circuit comprises a transistor, a control voltage generation circuit for generating a control voltage that is supplied to a control terminal of the transistor, and a sensing circuit for detecting a quantity indicative of a current flowing through the transistor. The control voltage generation circuit generates the control voltage in dependence on the detected quantity. The application further relates to a method of controlling a transistor to function as an active diode so that current may pass in one direction and is blocked in the opposite direction.
    Type: Application
    Filed: August 23, 2017
    Publication date: December 7, 2017
    Inventor: Shafqat Ali
  • Publication number: 20170277212
    Abstract: This application relates to a power converter circuit for converting a supply voltage received at an input node and providing, at an output node, a current at the converted supply voltage. The power converter circuit contains a DC-DC converter circuit for generating the current at the output node under control of a control signal, a current sensing circuit for sensing a current indicative of a current at the input node, a voltage adjustment circuit for sensing a voltage indicative of the supply voltage and generating an adjusted voltage on the basis of the sensed voltage and the sensed current, and an error amplifier stage for generating the control signal on the basis of the adjusted voltage and a reference voltage. The application further relates to a method of operating such power converter circuit.
    Type: Application
    Filed: March 17, 2017
    Publication date: September 28, 2017
    Inventor: Shafqat Ali
  • Patent number: 9755629
    Abstract: This application relates to an active diode circuit for letting current pass in one direction and blocking current in the opposite direction. The active diode circuit comprises a transistor, a control voltage generation circuit for generating a control voltage that is supplied to a control terminal of the transistor, and a sensing circuit for detecting a quantity indicative of a current flowing through the transistor. The control voltage generation circuit generates the control voltage in dependence on the detected quantity. The application further relates to a method of controlling a transistor to function as an active diode so that current may pass in one direction and is blocked in the opposite direction.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: September 5, 2017
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Shafqat Ali
  • Publication number: 20160241225
    Abstract: This application relates to an active diode circuit for letting current pass in one direction and blocking current in the opposite direction. The active diode circuit comprises a transistor, a control voltage generation circuit for generating a control voltage that is supplied to a control terminal of the transistor, and a sensing circuit for detecting a quantity indicative of a current flowing through the transistor. The control voltage generation circuit generates the control voltage in dependence on the detected quantity. The application further relates to a method of controlling a transistor to function as an active diode so that current may pass in one direction and is blocked in the opposite direction.
    Type: Application
    Filed: February 12, 2016
    Publication date: August 18, 2016
    Inventor: Shafqat Ali