EEVblog #611 - Electret Microphone Design
Part 5 - Doug Ford explains the design of Electret Microphone circuits, and all the associated traps:
Transconductance, correct biasing, and temperature effects, leaky JFETS, non-linear clipping & headroom, current noise and voltage noise, and pseudo bias resistors.
Also, the non-intuitive concept of higher resistance = less noise, and how this applies to electret biasing.
And what is a soggy circuit board and why is it important?
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Теги: Electret Microphone (Invention),electret microphone,circuit,design,how it works,resistance,jfet,transconductance,biasing,microphone,temperature,graph,frequency response,bias resistor,current noise,voltage noise,tutorial