Patents by Inventor Bruno Putzeys

Bruno Putzeys 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: 11956612
    Abstract: The present invention relates to a motor for an electrodynamic loudspeaker, comprising a magnetic circuit assembly arranged about a motor axis. The magnetic circuit assembly comprises: an outer magnet, a magnetically permeable top plate, a magnetically permeable bottom plate, a center pole piece and an air gap for receipt of a voice coil. The air gap is formed by an inner axially extending wall of the magnetically permeable top plate facing an axially extending peripheral wall section of the center pole piece to define a width, a bottom, a top and height of the air gap. The magnetic circuit assembly additionally comprises outwardly projecting magnetically permeable member arranged above the top of the air gap. The center pole piece comprises a magnetic member extending axially from at least the bottom of the air gap to a magnetically permeable bottom member or to the magnetically permeable bottom plate.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: April 9, 2024
    Assignee: PURIFI APS
    Inventors: Lars Risbo, Carsten Tinggaard, Morten Halvorsen, Bruno Putzeys
  • Publication number: 20230362547
    Abstract: --A motor for an electrodynamic loudspeaker and an electrodynamic loudspeaker including the motor. The motor includes a magnetic circuit assembly arranged about a motor axis. The motor includes: a magnetically permeable top plate, a magnetically permeable bottom plate, a magnetically permeable member disposed between, and magnetically coupled to, the magnetically permeable top and bottom plates, a center pole piece and an air gap for receipt of a voice coil. The motor also includes an outwardly projecting magnetically permeable member, or hat, arranged above a top of the air gap. The center pole piece includes a permanent magnet, such as a Neodymium magnet or a Ferrite magnet, extending axially from at least the bottom of the air gap to a magnetically permeable bottom member or to the magnetically permeable bottom plate.
    Type: Application
    Filed: September 1, 2021
    Publication date: November 9, 2023
    Inventors: Lars Risbo, Carsten Tinggaard, Morten Halvosen, Bruno Putzeys
  • Patent number: 11405007
    Abstract: An amplifier, such as a Class D amplifier, having one or more feedback loops comprising a path from the input to the primary amplifier input, where the paths comprise a low pass filter and a compensator which is disabled when the primary amplifier clips.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: August 2, 2022
    Assignee: PURIFI APS
    Inventors: Bruno Putzeys, Lars Risbo
  • Publication number: 20220167089
    Abstract: A loudspeaker with a non-uniform surround, a membrane and a stiffening element preventing the surround from flexing the membrane during operation. A non-uniform surround does not have the same cross section, along the radius of the speaker if circular, all around the perimeter of the membrane as some portions will be upwardly directed and other portions downwardly directed.
    Type: Application
    Filed: April 8, 2020
    Publication date: May 26, 2022
    Inventors: Bruno PUTZEYS, Lars RISBO, Carsten TINGGAARD
  • Publication number: 20220141592
    Abstract: A motor for an electrodynamic loudspeaker. The motor includes a magnetic circuit assembly arranged about a motor axis. The assembly includes: an outer magnet, a magnetically permeable top plate, a magnetically permeable bottom plate, a center pole piece and an air gap for receipt of a voice coil. The air gap is formed by an inner wall of the magnetically permeable top plate facing an axially extending peripheral wall section of the center pole piece to define the air gap. The magnetic circuit assembly also includes an outwardly projecting magnetically permeable member arranged above the air gap. The center pole piece has a magnetic member extending axially from the bottom of the air gap to a magnetically permeable bottom member or to the bottom plate. The magnetic member exhibits a relative AC magnetic permeability smaller than 10, which corresponds to the relative AC magnetic permeability of free air.
    Type: Application
    Filed: February 12, 2020
    Publication date: May 5, 2022
    Inventors: Lars Risbo, Carsten Tinggaard, Morten Halvorsen, Bruno Putzeys
  • Patent number: 11290823
    Abstract: The present invention discloses a loudspeaker driver comprising a magnet system having at least one gap where in each gap a voice coil assembly is arranged for movement in the gap, wherein either two distinct coils are arranged on the voice coil assembly, one above the other, and the magnet system comprises two pole pieces, one above the other, creating a pair of magnetized areas between said pole pieces and a yoke, such that a magnetic flux field is created between each pole piece and the yoke.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: March 29, 2022
    Assignee: DALI A/S
    Inventors: Kim Kristiansen, Lars Risbo, Bruno Putzeys
  • Patent number: 11258411
    Abstract: A Class D amplifier having an integrating primary amplifier with an internal feedback, the amplifier further comprising a feedback loop with a filter of at least second order.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: February 22, 2022
    Assignee: PURIFI APS
    Inventors: Bruno Putzeys, Lars Risbo
  • Patent number: 11082017
    Abstract: An amplifier comprising a gain stage with a feedback network comprising two ports between which at least three capacitors are connected in series and between each pair of capacitors a resistor is connected to a predetermined voltage. The gain stage is provided in a feedback loop over a primary amplifier.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: August 3, 2021
    Assignee: PURIFI APS
    Inventors: Bruno Putzeys, Lars Risbo
  • Publication number: 20210029463
    Abstract: The present invention discloses a loudspeaker driver comprising a magnet system having at least one gap where in each gap a voice coil assembly is arranged for movement in the gap, wherein either two distinct coils are arranged on the voice coil assembly, one above the other, and the magnet system comprises two pole pieces, one above the other, creating a pair of magnetized areas between said pole pieces and a yoke, such that a magnetic flux field is created between each pole piece and the yoke.
    Type: Application
    Filed: April 11, 2019
    Publication date: January 28, 2021
    Inventors: Kim Kristiansen, Lars Risbo, Bruno Putzeys
  • Publication number: 20200389135
    Abstract: An amplifier, such as a Class D amplifier, having one or more feedback loops comprising a path from the input to the primary amplifier input, where the paths comprise a low pass filter and a compensator which is disabled when the primary amplifier clips.
    Type: Application
    Filed: July 20, 2018
    Publication date: December 10, 2020
    Inventors: Bruno PUTZEYS, Lars RISBO
  • Publication number: 20200382084
    Abstract: A Class D amplifier having an integrating primary amplifier with an internal feedback, the amplifier further comprising a feedback loop with a filter of at least second order.
    Type: Application
    Filed: July 20, 2018
    Publication date: December 3, 2020
    Inventors: Bruno PUTZEYS, Lars RISBO
  • Publication number: 20200313633
    Abstract: An amplifier comprising a gain stage with a feedback network comprising two ports between which at least three capacitors are connected in series and between each pair of capacitors a resistor is connected to a predetermined voltage. The gain stage is provided in a feedback loop over a primary amplifier.
    Type: Application
    Filed: July 20, 2018
    Publication date: October 1, 2020
    Inventors: Bruno PUTZEYS, Lars RISBO
  • Patent number: 10728659
    Abstract: The present invention relates in one aspect to a method of controlling or limiting diaphragm excursion of a loudspeaker. The method comprising steps of receiving a first audio signal and deriving an excursion signal representing diaphragm excursion of the electrodynamic loudspeaker from the first audio signal. The method additionally comprises deriving an excursion envelope from the excursion signal and applying a second audio signal, derived from the first audio signal, to an input of an adjustable low-frequency suppressor. The second audio signal is filtered by the adjustable low-frequency suppressor to selectively attenuate low-frequency components based on the excursion envelope to produce a processed audio signal with reduced low-frequency content.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: July 28, 2020
    Assignee: Purifi APS
    Inventors: Bruno Putzeys, Lars Risbo
  • Publication number: 20190149920
    Abstract: The present invention relates in one aspect to a method of controlling or limiting diaphragm excursion of a loudspeaker. The method comprising steps of receiving a first audio signal and deriving an excursion signal representing diaphragm excursion of the electrodynamic loudspeaker from the first audio signal. The method additionally comprises deriving an excursion envelope from the excursion signal and applying a second audio signal, derived from the first audio signal, to an input of an adjustable low-frequency suppressor. The second audio signal is filtered by the adjustable low-frequency suppressor to selectively attenuate low-frequency components based on the excursion envelope to produce a processed audio signal with reduced low-frequency content.
    Type: Application
    Filed: May 2, 2017
    Publication date: May 16, 2019
    Applicant: Purifi APS
    Inventors: Bruno PUTZEYS, Lars RISBO
  • Publication number: 20060072657
    Abstract: A pulse width-modulated noise shaper (410) is described, which employs feedback from the power stage (260). Formation of the pulse width-modulated signal is done by applying a digital noise shaper (410) which uses feedback from the output of the power stage. Thus, any errors created by the power stage (260) are automatically corrected.
    Type: Application
    Filed: October 29, 2003
    Publication date: April 6, 2006
    Applicant: Koninklijke Philips Electronics N.V.
    Inventor: Bruno Putzeys
  • Publication number: 20050162228
    Abstract: A switching power amplifier of class D has switching means for generating a block wave signal by alternately switching the block wave signal between supply voltages. A filter (24,25) generates a power output signal (22) corresponding to an input signal to be amplified, which is coupled to a linear input (19) that is free of hysteresis. A control circuit (27,28,29) provides feedback between the output power signal and the linear input for controlling both the gain in the operational frequency range and also said alternately switching of the switching means. Hence the amplifier oscillates controlled via the same feedback loop that also controls the operational behavior of the amplifier, resulting in low output impedance and low distortion.
    Type: Application
    Filed: April 1, 2003
    Publication date: July 28, 2005
    Inventor: Bruno Putzeys