Adaptive control of bias settings in a digital microphone

A method, comprising:

• supplying, by a first component of a digital microphone, data indicative of a clock frequency of operation in a functional mode of the digital microphone, the clock frequency clocking one or more microphone components having switching activity;
• and
• determining, by a second component of the digital microphone, using the clock frequency, an amount of bias current to supply to at least a first microphone component of the one or more microphone components;
• based on a determination that the clock frequency is unchanged relative to a prior measured clock frequency, implementing, by the second component, a time delay of a determined magnitude before receiving and processing future data indicative of the clock frequency,
• wherein the determining, by the second component, comprising,
• receiving parameters defining a quantization of a relationship between the bias current and the clock frequency, wherein the quantization includes multiple bias current levels for respective frequency intervals;
• selecting a first bias current level corresponding to a particular frequency interval of the respective frequency intervals that includes the clock frequency;
• and
• configuring the amount of bias current to the selected first bias current level.

A digital microphone, comprising:

• a processing circuit including,
• a first component that provides data indicative of a clock frequency of operation in a functional mode of the digital microphone, the clock frequency clocking one or more microphone components having switching activity;
• and
• a second component that determines, using the clock frequency, an amount of bias current to supply to at least a first microphone component of the one or more microphone components, and based on the clock frequency being unchanged in relation to a previously measure clock frequency, implements a time delay of a determined magnitude before receiving and processing additional data representative of the clock frequency;
• and
• a microelectromechanical microphone die coupled to the circuit and configured to receive a pressure wave;
• the circuit configured to generate a signal representative of the pressure wave.