Two-line MEMS microphone

Abstract

The invention discloses a two-line MEMS microphone which comprises an MEMS microphone chip and an ASIC chip. The MEMS microphone chip is connected with the ASIC chip, the ASIC chip is provided with a first connection end (M+) and a second connection end (M-), and the ASIC chip receives sound signals picked by the MEMS microphone chip and converts the sound signals into current signals from the first connection end to the second connection end. The two-line MEMS microphone is concise in structure and small in size and facilitates miniaturization development of line control portions of an earphone and cost is reduced.

Description

technical field [0001] The invention relates to a two-wire MEMS microphone. Background technique [0002] MEMS microphone is a kind of electric energy sound transducer made by micromachining technology, which has the characteristics of small size, good frequency response characteristics and low noise. With the miniaturization and thinning of electronic devices, MEMS microphones are more and more widely used in these devices. [0003] At present, the mainstream 3.5mm earphones on the market have two types of interfaces, three-pole earphones and four-pole earphones. The 3.5mm three-pole earphone includes GND, left channel output, and right channel output three poles. The four-pole earphone refers to GND, left channel output, and right channel output three poles, as well as the MIC pole for microphone input. With the development of technology and the popularity of smart phones, quadrupole earphones that support microphone input have become mainstream products in the earphon...

AI Technical Summary

Problems solved by technology

[0006] In the above technical solution, the microphone itself has three interfaces, and three additional off-chip resistance capacitors (R1, R2, and uF-level large capacitor C) are requi

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