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Automatic Tape recorder shutdown circuit using TWH8778

In addition, BG3 great collector's 1000µF capacitor discharge time constant corresponding to a longer, and thus in the absence of the audio signal can also provide some time for the BG2 current gap in the signal so that BG2 will not end, TWH8778 not switch will be disconnected immediately, thus effectively preventing the emergence of the gap due to the error signal is turned off.

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Automatic Tape recorder shutdown circuit using TWH8778