公开(公告)号：US10609477B1

公开(公告)日：2020-03-31

申请号：US16443897

申请日：2019-06-18

Applicant: Texas Instruments Incorporated

Inventor： Jasjot Singh Chadha ,  David Hernandez ,  Mukund Navada Kanyana ,  Rejin Kanjavalappil Raveendranath ,  Sahiti Priya C

IPC: H04R3/00 ,  H02M3/00 ,  H03F3/217 ,  H02M3/158

Abstract: A boosted audio amplifier system includes a first digital interpolation filter configured to oversample an audio input signal at a first oversampling rate and includes a signal level detector having an input coupled to receive the oversampled audio input signal and configured to produce an audio input level signal. The system further includes a programmable delay buffer having inputs coupled to receive the oversampled audio input signal and a first delay signal. The programmable delay buffer adds a first delay to the oversampled audio input signal to produce a delayed input signal. The system also includes a first processor having inputs coupled to receive a battery voltage level signal, the audio input level signal and the first delay signal. The first processor is configured to produce boost control signals to regulate a boost voltage.

公开(公告)号：US11218823B2

公开(公告)日：2022-01-04

申请号：US16590590

申请日：2019-10-02

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aditya Polepeddi ,  Jasjot Singh Chadha ,  Mukund Navada Kanyana ,  Sahiti Priya C

IPC: H04R29/00 ,  G01R31/3193 ,  G01R31/28 ,  G01R31/317 ,  G01R31/319

Abstract: A system and method for performing speaker load diagnostics. A digital signal processor generates a diagnostic tone that is provided to the speaker. The diagnostic tone is generated using an oscillator internal to the digital signal processor. The digital signal processor receives current and voltage data from the speaker based on the diagnostic tone, and processes the current and voltage data to determine whether a fault condition exists in the speaker.