External protection signal generator by a circuit diagram TDA4866

Posted on Mar 28, 2007

As shown in FIG TDA4866 constituted by an external signal generator circuit protection. The role of the internal protection circuit is out of control, the external protection c

External protection signal generator by a circuit diagram TDA4866
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ircuit functions. Vertical amplitude of the output signal during normal operation of a larger, BC556 transistor is turned on, while the base current of transistor BC548 get too turned on to work as a low-level output indication. When not working properly, the vertical amplitude of the output signal is low, transistor BC556 is turned off, while transistor BC548 no base current is turned off, the output is high as an error work instructions.

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