公开(公告)号：US20200053493A1

公开(公告)日：2020-02-13

申请号：US16057711

申请日：2018-08-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： James F. Lazar ,  Pascal M. Brunet

IPC: H04R29/00 ,  H04R3/04 ,  H04R9/06

Abstract: One embodiment provides a system for nonlinear control of a loudspeaker. The system comprises a current source amplifier connected to the loudspeaker, and a controller connected to the current source amplifier. The controller is configured to determine a target displacement of a diaphragm of the speaker driver based on a source signal for reproduction via the loudspeaker, determine a control current based on the target displacement of the diaphragm and a first physical model of the loudspeaker, and transmit a control current signal specifying the control current to the current source amplifier. The current source amplifier outputs the control current to drive the speaker driver based on the control current signal. An actual displacement of the diaphragm during the reproduction of the source signal is controlled based on the control current, via the control current signal.

公开(公告)号：US11444577B2

公开(公告)日：2022-09-13

申请号：US16893838

申请日：2020-06-05

Applicant: Samsung Electronics Co., Ltd.

Inventor： James F. Lazar

IPC: H03F3/217 ,  H03F1/02 ,  H02M3/158 ,  H03F3/183

Abstract: One embodiment provides a system comprising a single DC voltage source and a Class-D amplifier comprising at least one DC/DC converter operated by the single DC voltage source. The amplifier is configured to receive an input signal for power amplification, and generate, via the at least one DC/DC converter, a DC output voltage that approaches or exceeds a DC supply voltage from the single DC voltage source. A gain of the amplifier is a ratio of the output voltage level to the input signal. A steady-state operating point of the at least one DC/DC converter is zero output.

公开(公告)号：US10542361B1

公开(公告)日：2020-01-21

申请号：US16057711

申请日：2018-08-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： James F. Lazar ,  Pascal M. Brunet

IPC: H04R29/00 ,  H04R3/04 ,  H04R9/06 ,  H03F3/183

Abstract: One embodiment provides a system for nonlinear control of a loudspeaker. The system comprises a current source amplifier connected to the loudspeaker, and a controller connected to the current source amplifier. The controller is configured to determine a target displacement of a diaphragm of the speaker driver based on a source signal for reproduction via the loudspeaker, determine a control current based on the target displacement of the diaphragm and a first physical model of the loudspeaker, and transmit a control current signal specifying the control current to the current source amplifier. The current source amplifier outputs the control current to drive the speaker driver based on the control current signal. An actual displacement of the diaphragm during the reproduction of the source signal is controlled based on the control current, via the control current signal.