US 12,143,786 B2
Electronic device having multiple speakers controlled by a single functional chip
Tsung-Han Yang, Kaohsiung (TW); Yen-Chih Wang, New Taipei (TW); Ming-Jun Hsiao, Hsinchu County (TW); and Tsung-Nan Wu, Hsinchu County (TW)
Assigned to RICHTEK TECHNOLOGY CORP., Hsinchu County (TW)
Filed by RICHTEK TECHNOLOGY CORP., Hsinchu County (TW)
Filed on Dec. 12, 2022, as Appl. No. 18/079,011.
Claims priority of application No. 111142247 (TW), filed on Nov. 4, 2022.
Prior Publication US 2024/0155292 A1, May 9, 2024
Int. Cl. H04R 3/12 (2006.01); H04R 1/24 (2006.01); H04R 3/04 (2006.01); H04R 5/04 (2006.01)
CPC H04R 3/12 (2013.01) [H04R 1/24 (2013.01); H04R 3/04 (2013.01); H04R 5/04 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electronic device having multiple speakers controlled by a single functional chip, comprising:
a first speaker configured to operate according to a driving voltage;
a second speaker coupled in parallel with the first speaker and configured to operate according to the driving voltage;
the single functional chip, comprising:
an amplifier configured to convert an output signal into the driving voltage;
a first current-sensing unit configured to detect a driving current which is equal to a sum of a first current flowing through the first speaker and a second current flowing through the second speaker;
a first analog-to-digital converter coupled to the first current-sensing unit and configured to convert the driving current into a first signal;
a second analog-to-digital converter configured to convert the second current into a second signal; and
a third analog-to-digital converter coupled in parallel with the first speaker and configured to convert the driving voltage into a third signal;
a second current-sensing unit coupled to the second speaker and configured to detect the second current flowing through the second speaker; and
a controller, comprising:
a judging circuit coupled to the first analog-to-digital converter for receiving the first signal and coupled to the second analog-to-digital converter for receiving the second signal, and configured to provide a fourth signal associated with the first current flowing through the first speaker by acquiring a difference between the first signal and the second signal; and
a parameter extraction circuit configured to acquire at least one first parameter of the first speaker and at least one second parameter of the second speaker based on the second signal, the third signal and the fourth signal; and
an audio processing module configured to:
receive an input signal;
adjust a gain of the input signal based on the at least one first parameter and the at least one second parameter; and
provide the output signal by amplifying the input signal with the gain.