Patent ID: 11906993
Assignee: CIRRUS LOGIC INC.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A method for feedforward correction in a multi-level output system having an output driver subsystem for outputting an output driving signal response to an input signal, comprising:
determining an occurrence of a mode transition between operating modes of the multi-level output system;
capturing a loop filter output of a signal path of the multi-level output system occurring before and after the occurrence of the mode transition; and
based on the transition and a change in the loop filter output responsive to the transition, determining a transition-specific compensation function to apply to a feedforward input signal of the signal path that is combined with the loop filter output;
wherein:
the multi-level output system is configured to operate in a selected operating mode selected from a plurality of operating modes based on the input signal; and
a supply voltage for the output driver subsystem is selected based on the selected operating mode.