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Principle of Microphone Amplifier Filter Circuit|Focus on mid-to-high-end brand capacitor manufacturers

by:Shenmao     2021-03-12
Principle of Microphone Amplifier Filter Circuit The principle of capacitor filtering is to connect capacitors in parallel to the power supply according to the nature of the capacitor voltage and current can be abrupt, to compensate for the slow transient response of the stabilized power supply, which is actually the high frequency required by the load. The dynamic current is provided by the capacitor to reduce the interference of the surge current on the DC voltage. The op amp power supply is a DC stabilized power supply. There are electrolytic capacitors at the input and output ends of the regulator to cooperate with high-frequency small capacitor filtering. The capacitors around the op amp chip are mainly used to suppress high-frequency interference sources. If the cost permits, a few uF can be used The tantalum capacitor is connected in parallel with 0.01uF---0.047uF high frequency ceramic dielectric (CC1) capacitor filter. If there are high-frequency switching devices such as digital circuits in the circuit, measures should be taken at the source, and the CC1 capacitor filter should be connected to the power supply pin and ground pin of the device. When debugging the circuit, you can use an oscilloscope to observe the interference of the power supply, and use capacitor experiments with different capacities and different properties to find out the filter capacitor suitable for the circuit.
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