Patents by Inventor James Douglas HUFFMAN

James Douglas HUFFMAN 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: 11476245
    Abstract: The present disclosure generally relates to the combination of MEMS intrinsic technology with specifically designed solid state ESD protection circuits in state of the art solid state technology for RF applications. Using ESD protection in MEMS devices has some level of complexity in the integration which can be seen by some as a disadvantage. However, the net benefits in the level of overall performance for insertion loss, isolation and linearity outweighs the disadvantages.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: October 18, 2022
    Assignee: Qorvo US, Inc.
    Inventors: Roberto Gaddi, James Douglas Huffman, Chenhui Niu, Ray Parkhurst
  • Patent number: 11417487
    Abstract: The present disclosure generally relates to the design of a MEMS ohmic switch which provides for a low-impact landing of the MEMS device movable plate on the RF contact and a high restoring force for breaking the contacts to improve the lifetime of the switch. The switch has at least one contact electrode disposed off-center of the switch device and also has a secondary landing post disposed near the center of the switch device. The secondary landing post extends to a greater height above the substrate as compared to the RF contact of the contact electrode so that the movable plate contacts the secondary landing post first and then gently lands on the RF contact. Upon release, the movable plate will disengage from the RF contact prior to disengaging from the secondary landing post and have a longer lifetime due to the high restoring force.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: August 16, 2022
    Assignee: Qorvo US, Inc.
    Inventors: Richard L. Knipe, Robertus Petrus Van Kampen, James Douglas Huffman, Lance Barron
  • Patent number: 10896787
    Abstract: The present invention generally relates to a mechanism for making a MEMS switch that has a robust RF-contact by avoiding currents to run through a thin sidewall in a via from the RF-contact to the underlying RF-electrode.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: January 19, 2021
    Assignee: Cavendish Kinetics, Inc.
    Inventors: Robertus Petrus Van Kampen, James Douglas Huffman, Mickael Renault, Shibajyoti Ghosh Dastider, Jacques Marcel Muyango
  • Patent number: 10867756
    Abstract: The present invention generally relates to a mechanism for making a MEMS switch that has a robust RF-contact by avoiding currents to run through a thin sidewall in a via from the RF-contact to the underlying RF-electrode.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: December 15, 2020
    Assignee: Cavendish Kinetics, Inc.
    Inventors: Robertus Petrus Van Kampen, James Douglas Huffman, Mickael Renault, Shibajyoti Ghosh Dastider, Jacques Marcel Muyango
  • Publication number: 20200185176
    Abstract: The present disclosure generally relates to the design of a MEMS ohmic switch which provides for a low-impact landing of the MEMS device movable plate on the RF contact and a high restoring force for breaking the contacts to improve the lifetime of the switch. The switch has at least one contact electrode disposed off-center of the switch device and also has a secondary landing post disposed near the center of the switch device. The secondary landing post extends to a greater height above the substrate as compared to the RF contact of the contact electrode so that the movable plate contacts the secondary landing post first and then gently lands on the RF contact. Upon release, the movable plate will disengage from the RF contact prior to disengaging from the secondary landing post and have a longer lifetime due to the high restoring force.
    Type: Application
    Filed: September 14, 2017
    Publication date: June 11, 2020
    Inventors: Richard L. KNIPE, Jr., Robertus Petrus VAN KAMPEN, James Douglas HUFFMAN, Lance BARRON
  • Publication number: 20180315748
    Abstract: The present disclosure generally relates to the combination of MEMS intrinsic technology with specifically designed solid state ESD protection circuits in state of the art solid state technology for RF applications. Using ESD protection in MEMS devices has some level of complexity in the integration which can be seen by some as a disadvantage. However, the net benefits in the level of overall performance for insertion loss, isolation and linearity outweighs the disadvantages.
    Type: Application
    Filed: November 14, 2016
    Publication date: November 1, 2018
    Inventors: Roberto GADDI, James Douglas HUFFMAN, Chenhui NIU, Ray PARKHURST
  • Publication number: 20180308645
    Abstract: The present invention generally relates to a mechanism for making a MEMS switch that has a robust RF-contact by avoiding currents to run through a thin sidewall in a via from the RF-contact to the underlying RF-electrode.
    Type: Application
    Filed: November 14, 2016
    Publication date: October 25, 2018
    Inventors: Robertus Petrus VAN KAMPEN, James Douglas HUFFMAN, Mickael RENAULT, Shibajyoti Ghosh DASTIDER, Jacques Marcel MUYANGO
  • Patent number: 10029914
    Abstract: The present invention generally relates to a mechanism for testing a MEMS hysteresis. A power management circuit may be coupled to the electrodes that cause the movable plate that is disposed between the electrodes in a MEMS device to move. The power management circuit may utilize a charge pump, a comparator and a resistor ladder.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: July 24, 2018
    Assignee: CAVENDISH KINETICS, INC.
    Inventors: James Douglas Huffman, Cong Quoc Khieu, Robertus Petrus Van Kampen, Karl F. Smayling, Vikram Joshi
  • Patent number: 9948212
    Abstract: The present invention generally relates to a method of operating a MEMS DVC while minimizing impact of the MEMS device on contact surfaces. By reducing the drive voltage upon the pull-in movement of the MEMS device, the acceleration of the MEMS device towards the contact surface is reduced and thus, the impact velocity is reduced and less damage of the MEMS DVC device occurs.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: April 17, 2018
    Assignee: CAVENDISH KINETICS, INC.
    Inventors: Cong Quoc Khieu, James Douglas Huffman, Richard L. Knipe, Vikram Joshi, Robertus Petrus Van Kampen
  • Publication number: 20160297677
    Abstract: The present invention generally relates to a mechanism for testing a MEMS hysteresis. A power management circuit may be coupled to the electrodes that cause the movable plate that is disposed between the electrodes in a MEMS device to move. The power management circuit may utilize a charge pump, a comparator and a resistor ladder.
    Type: Application
    Filed: April 23, 2015
    Publication date: October 13, 2016
    Inventors: James Douglas HUFFMAN, Cong Quoc KHIEU, Robertus Petrus VAN KAMPEN, Karl F. SMAYLING, Vikram JOSHI
  • Patent number: 9385594
    Abstract: The present invention generally relates to a DVC having a charge-pump coupled to a MEMS device. The charge-pump is designed to control the output voltage delivered to the electrodes, such as the pull-in electrode or the pull-off electrode, that move the switching element within the MEMS device between locations spaced far from and disposed closely to the RF electrode.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: July 5, 2016
    Assignee: Cavendish Kinetics, Inc.
    Inventors: Robertus Petrus Van Kampen, Cong Quoc Khieu, James Douglas Huffman, Richard L. Knipe
  • Publication number: 20160072408
    Abstract: The present invention generally relates to a method of operating a MEMS DVC while minimizing impact of the MEMS device on contact surfaces. By reducing the drive voltage upon the pull-in movement of the MEMS device, the acceleration of the MEMS device towards the contact surface is reduced and thus, the impact velocity is reduced and less damage of the MEMS DVC device occurs.
    Type: Application
    Filed: May 16, 2014
    Publication date: March 10, 2016
    Inventors: Cong Quoc KHIEU, James Douglas HUFFMAN, Richard L. KNIPE, Vikram JOSHI, Robertus Petrus VAN KAMPEN
  • Publication number: 20160065058
    Abstract: The present invention generally relates to a DVC having a charge-pump coupled to a MEMS device. The charge-pump is designed to control the output voltage delivered to the electrodes, such as the pull-in electrode or the pull-off electrode, that move the switching element within the MEMS device between locations spaced far from and disposed closely to the RF electrode.
    Type: Application
    Filed: April 2, 2014
    Publication date: March 3, 2016
    Inventors: Robertus Petrus VAN KAMPEN, Cong Quoc KHIEU, James Douglas HUFFMAN, Richard L. KNIPE