SINGLE-END-TO-DIFFERENTIAL MICROPHONE CIRCUIT AND ELECTRONIC EQUIPMENT
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United States of America
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Issued Date -
Jan 30, 2025
app pub date -
May 20, 2022
filing date -
May 20, 2022
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Abstract
The present invention provides a single-end-to-differential microphone circuit and an electronic equipment, including: an amplifier, a microphone connected to the positive input end of the amplifier, a coupling capacitor CAC connected to the negative input end of the amplifier, a first feedback capacitor CFB1 connected to the negative output end of the amplifier, a first feedback resistor RFB1 connected in parallel with the first feedback capacitor CFB1, a second feedback capacitor connected to the positive output end of the amplifier CFB2, and a second feedback resistor RFB2 connected in parallel with the second feedback capacitor CFB1. The circuit of the present invention can adopt a microphone structure with smaller capacity, and at the same time has a better system signal to noise ratio.
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