This ti Precision design details the design process for a preamplifier to be used with electret microphone capsules. It explains the basic construction and operation of an electret microphone and uses an OPA172 to amplify the output of the microphone to common analog line level voltages.
特性
TI Precision Designs: Verified Design
Designed for a single 9V battery power supply
~2mA supply current
68dB SNR with Microphone
This design is tested and includes theory, component selection, TINA-TI simulation, PCB schematic & layout, bill of materials, and measured results.
Single-Supply Electret Microphone Preamplifier Reference Design.pdf
(960.86 KB)
举报
