Patents by Inventor Gajendranath Chowdary

Gajendranath Chowdary 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: 9628906
    Abstract: An electrical interface circuit includes a microphone circuit, a battery charger circuit and an electrical connector for connecting the electrical interface circuit to an external device. The electrical connector has a pin on which signals are multiplexed for connecting either the battery charger circuit to an external supply voltage, or the microphone circuit to an external microphone. The battery charger circuit includes an amplifying circuit for controlling voltage or current to a battery at battery charging, and a p-type power transistor. The pin is connected to the microphone circuit and to a source of the p-type power transistor. When a voltage applied to the pin exceeds the battery voltage, the p-type power transistor provides current from the pin to the charger circuit, and, otherwise, the charger circuit and battery are disconnected from the pin. A method of multiplexing signals on the electrical interface circuit is also disclosed.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: April 18, 2017
    Assignee: OPTIS CIRCUIT TECHNOLOGY, LLC
    Inventors: Gajendranath Chowdary, Ravpreet Singh, Shyam Somayajula
  • Publication number: 20140139046
    Abstract: An electrical interface circuit is disclosed. The circuit comprises a microphone circuit (100); a battery charger circuit (200); and an electrical connector (300) for connecting said electrical interface circuit to an external device. The electrical connector has a pin (302) on which signals are multiplexed for connecting either the battery charger circuit to an external supply voltage or the microphone circuit to an external microphone. The battery charger circuit comprises an amplifying circuit (202) for controlling voltage or current to a battery (400) at battery charging and a p-type power transistor. The pin is connected to the microphone circuit and to a source of the p-type power transistor, and when a voltage applied to the pin exceeds the battery voltage, the p-type power transistor will provide current from the pin to the charger circuit, and otherwise the charger circuit and battery is disconnected from the pin. A method of multiplexing signals on the electrical interface circuit is also disclosed.
    Type: Application
    Filed: February 9, 2012
    Publication date: May 22, 2014
    Inventors: Gajendranath Chowdary, Ravpreet Singh, Shyam Somayajula