US 12,267,049 B2
Audio amplifer with fast wake-up power supply
Eric Mendenhall, Trabuco Canyon, CA (US); and Jason Todd Muroki, Irvine, CA (US)
Assigned to RGB Systems, Inc., Anaheim, CA (US)
Filed by RGB Systems, Inc., Anaheim, CA (US)
Filed on Dec. 1, 2021, as Appl. No. 17/540,066.
Prior Publication US 2023/0170856 A1, Jun. 1, 2023
Int. Cl. H03F 3/21 (2006.01); H03F 1/02 (2006.01); H03F 3/217 (2006.01); H03F 3/24 (2006.01); H03F 1/26 (2006.01)
CPC H03F 3/2171 (2013.01) [H03F 1/0233 (2013.01); H03F 3/245 (2013.01); H03F 1/26 (2013.01); H03F 2200/03 (2013.01); H03F 2200/351 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An audio amplifier comprising:
a power amplifier configured to amplify an input audio signal to obtain an amplified audio signal and output the amplified audio signal to a speaker;
an isolated power supply comprising one or more capacitors and a burst mode input configured to receive a burst mode signal, wherein the burst mode signal indicates whether the audio amplifier is in a standby state, wherein, when the burst mode signal indicates that the audio amplifier is in the standby state, the isolated power supply cycles between an active state for a first segment of a time period and an inactive state for a second segment of the time period, and wherein the one or more capacitors of the isolated power supply are charged when the isolated power supply is in the active state;
a burst generator configured to generate the burst mode signal in response to a control signal and to provide the burst mode signal to the burst mode input;
a controller configured to generate the control signal based on a determination that the audio amplifier is in the standby state; and
a power supply configured to provide power to the power amplifier, wherein the power supply comprises the isolated power supply and a power factor correction circuit connectable to a main power supply.