US 11,843,354 B2
Protection circuitry
Pradeep Saminathan, Edinburgh (GB); Graeme S. Angus, Edinburgh (GB); and John B. Bowlerwell, Edinburgh (GB)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Jun. 14, 2021, as Appl. No. 17/346,767.
Claims priority of provisional application 63/041,300, filed on Jun. 19, 2020.
Claims priority of application No. 2009882 (GB), filed on Jun. 29, 2020.
Prior Publication US 2021/0399691 A1, Dec. 23, 2021
Int. Cl. H03F 1/52 (2006.01); H02M 1/32 (2007.01); H03F 1/56 (2006.01)
CPC H03F 1/52 (2013.01) [H02M 1/32 (2013.01); H03F 1/56 (2013.01); H03F 2200/03 (2013.01); H03F 2200/102 (2013.01); H03F 2200/171 (2013.01)] 27 Claims
OG exemplary drawing
 
1. Circuitry comprising:
interpolation filter circuitry configured to receive a digital input signal and to output an interpolated digital signal;
amplifier circuitry configured to generate an output signal based on the interpolated digital signal; and
protection circuitry,
wherein the protection circuitry is configured to activate in response to detection of a fault condition at an output of the amplifier circuitry, and
wherein the circuitry further comprises first detection circuitry configured to output a control signal to disable the protection circuitry on detection of a transient signal at an output of the interpolation filter circuitry that is unrelated to a fault.