Closed loop control in a camera module

A method comprising:

• in a first mode of operation, pre-driving with a pulse-width modulation mode path an output stage for driving a load at an output of the output stage;
• in a second mode of operation, pre-driving the output stage with a linear mode path;
• and
• filtering an output signal with a loop filter, wherein an input of the loop filter is coupled to the output of the output stage and wherein an output of the loop filter is coupled to both of the pulse-width modulation mode path and the linear mode path;
• wherein the pulse-width modulation mode path and the linear mode path are configured such that a first transfer function between the output of the loop filter and the output of the output stage through the pulse-width modulation mode path is substantially equivalent to a second transfer function between the output of the loop filter and the output of the output stage through the linear mode path,
• such that an output of the loop filter after switching between the first mode of operation and the second mode of operation settles to approximately the same value as the output of the loop filter before switching between the first mode of operation and the second mode of operation.