Single-Supply, Electret Microphone Pre-Amplifier Reference Design
نویسنده
چکیده
TI Designs – Precision are analog solutions created by TI’s analog experts. Verified Designs offer the theory, component selection, simulation, complete PCB schematic & layout, bill of materials, and measured performance of useful circuits. Circuit modifications that help to meet alternate design goals are also discussed. This single-supply microphone pre-amplifier amplifies the output signal of an electret capsule microphone to audio line levels. An op amp is used as a transimpedance amplifier to convert the output current from the microphone into a signal level voltage. The circuit is designed to be operated from a single 9V supply so it is appropriate for battery operated systems.
منابع مشابه
Low Noise, Single Supply, Electret Microphone Amplifier Design for Distant Acoustic Signals
Modern day electronics are often battery powered, forcing the design to be single supplied. Electret microphones are small and affordable, yet require additional circuitry. The amplifier described herein is low noise, relatively immune to supply oscillations, and can operate single supply with an electret microphone.
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