US 11,949,382 B2
Amplifier systems
Philip Clarkin, Austin, TX (US); Ivan Perry, Edinburgh (GB); Mark H. Tovell, Edinburgh (GB); Roberto Napoli, Milan (IT); and David Rhodes, Austin, TX (US)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Aug. 24, 2022, as Appl. No. 17/894,799.
Application 17/894,799 is a continuation of application No. 16/850,248, filed on Apr. 16, 2020, granted, now 11,476,805.
Claims priority of provisional application 62/944,030, filed on Dec. 5, 2019.
Prior Publication US 2022/0407461 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 1/02 (2006.01); H03F 3/217 (2006.01); H03M 1/12 (2006.01); H04R 3/00 (2006.01)
CPC H03F 1/0227 (2013.01) [H03F 3/217 (2013.01); H03M 1/12 (2013.01); H04R 3/007 (2013.01); H03F 2200/03 (2013.01)] 19 Claims
OG exemplary drawing
 
1. Circuitry comprising:
amplifier circuitry for driving a load;
boost circuitry for supplying a variable supply voltage to the amplifier circuitry; and
processing circuitry configured to:
monitor a voltage monitor signal (VMON) indicative of a voltage across the load when driven by the amplifier circuitry and/or a current monitor (IMON) signal indicative of a current through the load when driven by the amplifier circuitry;
determine a level of electrical coupling between the boost circuitry and the voltage monitor (VMON) and/or current monitor (IMON) signals; and
apply a correction to the voltage monitor (VMON) and/or current monitor (IMON) signals based on the determined level of coupling.