Transcription of Elect ret Microphone - TI.com
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Elect ret Microphone - TI.com
An IMPORTANT NOTICE at the end of this TI reference design addresses authorized use, intellectual property matters and other important disclaimers and information. TINA-TI is a trademark of Texas Instruments WEBENCH is a registered trademark of Texas Instruments TIDU765-January 2015 Single-Supply, Electret Microphone Pre-Amplifier Reference Design 1 Copyright 2015, Texas Instruments Incorporated John Caldwell TI Designs Precision: Verified Design Single-Supply, Electret Microphone Pre-Amplifier Reference Design TI Designs Precision Circuit DescriptionTI 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.
2.3 Op Amp Bias Network Resistors R3 and R5 center the op amp input and output at the midpoint between the power supplies to allow for the widest possible output signal swing. Therefore R 3 = R 5 for V B = V CC / 2. 100kΩ resistors were used in order to limit the power supply current drawn by this voltage divider. The current in the voltage
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