公开(公告)号：US20190306605A1

公开(公告)日：2019-10-03

申请号：US16307575

申请日：2017-06-13

Applicant: FOCAL JMLAB

Inventor： Ludovic Uhring-Cadart ,  Clement Auzou ,  Arnaud Cazes Bouchet

IPC: H04R1/10

Abstract: The invention relates to a broadband electrodynamic transducer for headphones, said transducer comprising:—a magnetic motor designed to generate a magnetic field;—a coil that is disposed in the air gap of the magnetic motor and can move translationally under the effect of the magnetic field; and—a membrane that is connected to the coil in such a way as to convert the translational movement of the coil into an acoustic wave;—the transducer comprising a self-supporting coil that is glued to the membrane, the membrane having a Young's modulus of more than 40 GPa.

公开(公告)号：US20250158584A1

公开(公告)日：2025-05-15

申请号：US18834318

申请日：2023-01-25

Applicant: Focal jmlab

Inventor： Christian Jury ,  Ludovic Uhring-Cadart ,  Michel Marandon

IPC: H03F3/30 ,  H03F1/02 ,  H03F3/183 ,  H03F3/45

Abstract: The invention relates to a high-performance audio amplifier intended to control at least one loudspeaker, the amplifier comprising a pre-amplification stage that receives an input signal, a power amplification stage connected to the pre-amplification stage and a feedback that delivers to the pre-amplification stage an image of the output signal, the power amplification stage comprising two power supply circuits comprising a MOSFET transistor. The invention is characterized in that it comprises: a sub-circuit for assisting with charging, a sub-circuit for assisting with discharging said MOSFET transistor, and a voltage-shifting sub-circuit.

公开(公告)号：US10932026B2

公开(公告)日：2021-02-23

申请号：US16307575

申请日：2017-06-13

Applicant: FOCAL JMLAB

Inventor： Ludovic Uhring-Cadart ,  Clement Auzou ,  Arnaud Cazes Bouchet

IPC: H04R9/04 ,  H04R1/10 ,  H04R7/12 ,  H04R5/033 ,  H04R7/20

Abstract: The invention relates to a broadband electrodynamic transducer for headphones, said transducer comprising: —a magnetic motor designed to generate a magnetic field; —a coil that is disposed in the air gap of the magnetic motor and can move translationally under the effect of the magnetic field; and —a membrane that is connected to the coil in such a way as to convert the translational movement of the coil into an acoustic wave; —the transducer comprising a self-supporting coil that is glued to the membrane, the membrane having a Young's modulus of more than 40 GPa.