Microphone with built-in speaker driver

摘要

A microphone package is integrated with a built-in speaker driver. A microphone application-specific integrated circuit (ASIC) and the speaker driver can be directly coupled to an external application processor, eliminating a need for a codec and thus, reducing the size, cost, and/or complexity of a device. In one aspect, the speaker driver and the microphone ASIC are implemented as separate dice mounted on the package substrate. In another aspect, the speaker driver and the microphone ASIC are implemented as stacked die on the package substrate. In yet another aspect, the speaker driver and the microphone ASIC are implemented as a single die on the package substrate.

主权项

1. A microphone package, comprising:
a microphone application-specific integrated circuit (ASIC), coupled to a microphone transducer, that generates a digital audio output signal based on sensing an acoustical signal; and a speaker driver that generates, based on a digital audio input signal, a drive signal employable to drive a speaker, wherein a first frequency of a first charge pump utilized by the speaker driver is synchronized with a second frequency of a second charge pump utilized by the microphone transducer.