Microphone with built-in speaker driver

A method, comprising:

• implementing a microphone transducer within a package;
• coupling the microphone transducer to a microphone application-specific integrated circuit (ASIC) implemented within the package;
• implementing a speaker driver within the package;
• and
• synchronizing a first frequency of a first charge pump utilized by the speaker driver with a second frequency of a second charge pump utilized by the microphone transducer.

An integrated circuit, comprising:

• a microphone application-specific integrated circuit (ASIC) coupled to a microphone transducer that is configured to direct, to an external device, a digital audio output signal that is determined based on sensing an acoustical signal;
• and
• a speaker driver that is configured to generate, based on a digital audio input signal received from the external device, a drive signal employable to drive a speaker,
• wherein the microphone ASIC and the speaker driver are implemented within a common package, and
• wherein a first charge pump utilized by the speaker driver employs a first frequency that is synchronized with a second frequency of a second charge pump that is utilized by the microphone transducer.

A system, comprising:

• an application processor;
• a piezo speaker;
• and
• a microphone package comprising:
• a microphone transducer that senses an acoustical signal;
• a microphone application-specific integrated circuit (ASIC) coupled to the microphone transducer that generates a digital audio output signal based on the acoustical signal, wherein the digital audio output signal is provided to the application processor;
• and
• a piezo speaker driver that receives a digital audio input signal from the application processor and generates a drive signal that drives the piezo speaker, wherein a first frequency of a first charge pump utilized by the piezo speaker driver is synchronized with a second frequency of a second charge pump utilized by the microphone transducer.