US 11,706,565 B2
Audio source amplification with speaker protection features and internal voltage and current sensing
Marshall Chiu, Santa Clara, CA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Jul. 7, 2021, as Appl. No. 17/369,920.
Claims priority of provisional application 63/152,770, filed on Feb. 23, 2021.
Prior Publication US 2022/0272449 A1, Aug. 25, 2022
Int. Cl. H03F 3/187 (2006.01); H04R 3/00 (2006.01); H03G 3/30 (2006.01)
CPC H04R 3/007 (2013.01) [H03F 3/187 (2013.01); H03G 3/3005 (2013.01); H03F 2200/03 (2013.01); H03G 2201/103 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a speaker; and
a chip electrically coupled to the speaker by an electrical connection, wherein the chip comprises:
a processor configured to generate a signal;
an amplifier element on the chip, the amplifier element configured to amplify the signal into an amplified signal, wherein the amplifier element is located at least one of:
in direct contact with terminals of the speaker; or
a distance away from the terminals of the speaker, wherein a software resistance compensation module is used to compensate for resistance from a connection element that connects the amplifier element and the speaker;
a current monitor on the chip, the current monitor configured to monitor a current of the amplified signal prior to the amplified signal being output from the chip to the speaker;
a voltage monitor on the chip, the voltage monitor configured to monitor a voltage of the amplified signal prior to the amplified signal being output from the chip to the speaker; and
wherein the processor of the chip is configured to control a power of the amplified signal output from the chip to the speaker based at least on the current and the voltage.