2-to-1 Audio Signal Multiplexer

A 2-to-1 analog multiplexer can select one signal path from two sources. This example switches between a microphone-level source and a line-level source under control of a select signal. The output then feeds a defined load representing the next stage. The drawing is useful when planning source selection ahead of a preamplifier, recorder or audio processor. In a built circuit, choose an analog switch that suits the signal range, supply voltage and audio performance requirements. Add gain control or buffering where the source impedances and levels require it.

類型 電路圖標準 IEEE Std 315 / ANSI Y32.2引擎 schematex-circuit更新時間 2026/9/24

需求

“Draw a 5 V 2-to-1 analog audio multiplexer that selects between a microphone input and a line input with a source-select control and a 10 kΩ output load.”

接著試試Add a mute control.Change the line input to 2 V peak-to-peak.

這張圖裡有什麼

看懂背後的決策。

01Two source inputs

Microphone and line level feed the selector.

02Select control

One signal chooses the active source.

03Loaded output

The output feeds the next audio stage.

Use this when an audio circuit needs to choose one source path.

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常見問題

Can a multiplexer select audio signals?

Yes, an analog switch can select between compatible audio signal paths.

Why are microphone and line inputs different?

They normally have different signal levels and may need separate gain or buffering.

What does the select signal do?

It chooses which input the multiplexer connects to the output.