US 12,191,824 B2
Low voltage system for audio amplifiers
Mark R. Peting, Yamhill, OR (US); Taehwan Oh, Portland, OR (US); and Miles Reuben Thompson, Portland, OR (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Sep. 28, 2022, as Appl. No. 17/955,271.
Claims priority of provisional application 63/250,185, filed on Sep. 29, 2021.
Prior Publication US 2023/0110804 A1, Apr. 13, 2023
Int. Cl. H04R 1/10 (2006.01); H02J 7/34 (2006.01); H03F 3/217 (2006.01); H04R 3/00 (2006.01); H04R 5/00 (2006.01)
CPC H03F 3/217 (2013.01) [H02J 7/345 (2013.01); H04R 1/1041 (2013.01); H04R 3/00 (2013.01); H03F 2200/03 (2013.01); H04R 2201/028 (2013.01); H04R 2420/07 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A low voltage system comprising:
a capacitor between an output node of an amplifier and ground, the output node connectable to a load, the amplifier configured to operate with a series of pulses;
a monitoring circuit configured to monitor a voltage at the capacitor against a desired low voltage value;
a control system configured to generate the series of pulses for the amplifier, and to control charging and discharging of the capacitor based on an output of the monitoring circuit to regulate the voltage at the output node at approximately the desired low voltage value.