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FPGA source audio signal Analyzer
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&The audio signal first passes through a 50 ohm impedance matching circuit composed of OP AMP and resistor to meet the system requirements of input impedance of 50 ohm, so as to facilitate the calculation of signal power. In order to ensure that the processed signal is sampled without distortion, the signal must pass through the anti aliasing low-pass filter with the cut-off frequency of 10kHz. Finally, in order to sample the ad correctly, the signal must pass through the signal raising circuit.
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