Patents by Inventor Darrell Hayes

Darrell Hayes 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).

  • Pre-amplification conditioning circuit for a transducer audio device
    Patent number: 12021490
    Abstract: A microphone system includes a microphone and a pre-amplification conditioning circuit configured within a housing and comprising a pair of matched JFETs configured in a differential pair with common-source configuration and, when biased, are operable to receive and amplify the differential microphone output signal. The microphone further includes a pair of BJTs configured as a complimentary feedback transistor pair with each of the pair of BJTs coupled in parallel to a corresponding one of the pair of matched JFETs, and a current sink coupled to the matched JFETs and corresponding emitter electrodes of the BJTs and operable to maintain a fixed total direct current through each of the matched JFETs and BJTs, which reduces the JFETs corresponding electrical load, reduces signal noise, and increases a maximum amplified microphone output signal level at the drains of the matched JFETs.
    Type: Grant
    Filed: April 14, 2023
    Date of Patent: June 25, 2024
    Assignee: Logitech Europe S.A.
    Inventors: Aron Michael Rosenberg, Darrell Hayes, Matthew Fumio Yamamoto, Tyler Copeland Barkley
  • PRE-AMPLIFICATION CONDITIONING CIRCUIT FOR A TRANSDUCER AUDIO DEVICE
    Publication number: 20230261617
    Abstract: A microphone system includes a microphone and a pre-amplification conditioning circuit configured within a housing and comprising a pair of matched JFETs configured in a differential pair with common-source configuration and, when biased, are operable to receive and amplify the differential microphone output signal. The microphone further includes a pair of BJTs configured as a complimentary feedback transistor pair with each of the pair of BJTs coupled in parallel to a corresponding one of the pair of matched JFETs, and a current sink coupled to the matched JFETs and corresponding emitter electrodes of the BJTs and operable to maintain a fixed total direct current through each of the matched JFETs and BJTs, which reduces the JFETs corresponding electrical load, reduces signal noise, and increases a maximum amplified microphone output signal level at the drains of the matched JFETs.
    Type: Application
    Filed: April 14, 2023
    Publication date: August 17, 2023
    Inventors: Aron Michael Rosenberg, Darrell Hayes, Matthew Fumio Yamamoto, Tyler Copeland Barkley
  • PRE-AMPLIFICATION CONDITIONING CIRCUIT FOR A TRANSDUCER AUDIO DEVICE
    Publication number: 20230246604
    Abstract: A microphone system includes a microphone and a pre-amplification conditioning circuit configured within a housing and comprising a pair of matched JFETs configured in a differential pair with common-source configuration and, when biased, are operable to receive and amplify the differential microphone output signal. The microphone further includes a pair of BJTs configured as a complimentary feedback transistor pair with each of the pair of BJTs coupled in parallel to a corresponding one of the pair of matched JFETs, and a current sink coupled to the matched JFETs and corresponding emitter electrodes of the BJTs and operable to maintain a fixed total direct current through each of the matched JFETs and BJTs, which reduces the JFETs corresponding electrical load, reduces signal noise, and increases a maximum amplified microphone output signal level at the drains of the matched JFETs.
    Type: Application
    Filed: January 31, 2022
    Publication date: August 3, 2023
    Inventors: Aron Michael Rosenberg, Darrell Hayes, Matthew Fumio Yamamoto, Tyler Copeland Barkley
  • Pre-amplification conditioning circuit for a transducer audio device
    Patent number: 11711058
    Abstract: A microphone system includes a microphone and a pre-amplification conditioning circuit configured within a housing and comprising a pair of matched JFETs configured in a differential pair with common-source configuration and, when biased, are operable to receive and amplify the differential microphone output signal. The microphone further includes a pair of BJTs configured as a complimentary feedback transistor pair with each of the pair of BJTs coupled in parallel to a corresponding one of the pair of matched JFETs, and a current sink coupled to the matched JFETs and corresponding emitter electrodes of the BJTs and operable to maintain a fixed total direct current through each of the matched JFETs and BJTs, which reduces the JFETs corresponding electrical load, reduces signal noise, and increases a maximum amplified microphone output signal level at the drains of the matched JFETs.
    Type: Grant
    Filed: January 31, 2022
    Date of Patent: July 25, 2023
    Assignee: Logitech Europe S.A.
    Inventors: Aron Michael Rosenberg, Darrell Hayes, Matthew Fumio Yamamoto, Tyler Copeland Barkley