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LM1875: LM1875 THD vs. power curve

Part Number: LM1875

Support Path: /Product/Development and troubleshooting/Find key information on a device/

Hello:

Why does the LM1875 typical THD vs. distortion curve (figure 3) have that odd shape, i.e., it rises with decreasing power, which implies crossover distortion, then falls as power is further reduced?