公开(公告)号：US11470434B2

公开(公告)日：2022-10-11

申请号：US17319061

申请日：2021-05-12

Applicant: Texas Instruments Incorporated

Inventor： David Hernandez ,  Amit Goyal

IPC: H04R29/00 ,  H04R9/06 ,  H04R3/00 ,  G01K13/00

Abstract: A system for determining the temperature of a voice coil of a speaker includes a first pre-emphasis filter which has an input coupled to receive a digitized current sense signal. The first pre-emphasis filter applies a gain to signal components at a selected frequency band and provides a pre-emphasized current sense signal. The system includes a second pre-emphasis filter which has an input coupled to receive a digitized voltage sense signal. The second pre-emphasis filter applies a gain to the signal components at the selected frequency band and provides a pre-emphasized voltage sense signal. The system includes a first quantizer module configured to map the pre-emphasized signal to a quantized current sense signal, and includes a second quantizer module configured to map the pre-emphasized voltage sense signal to a quantized voltage sense signal.

公开(公告)号：US20210409885A1

公开(公告)日：2021-12-30

申请号：US17319061

申请日：2021-05-12

Applicant: Texas Instruments Incorporated

Inventor： David Hernandez ,  Amit Goyal

IPC: H04R29/00 ,  H04R9/06 ,  G01K13/00 ,  H04R3/00

Abstract: A system for determining the temperature of a voice coil of a speaker includes a first pre-emphasis filter which has an input coupled to receive a digitized current sense signal. The first pre-emphasis filter applies a gain to signal components at a selected frequency band and provides a pre-emphasized current sense signal. The system includes a second pre-emphasis filter which has an input coupled to receive a digitized voltage sense signal. The second pre-emphasis filter applies a gain to the signal components at the selected frequency band and provides a pre-emphasized voltage sense signal. The system includes a first quantizer module configured to map the pre-emphasized signal to a quantized current sense signal, and includes a second quantizer module configured to map the pre-emphasized voltage sense signal to a quantized voltage sense signal.