Astable-multivibrator


Posted on Jan 19, 2013

The 4047 is configured as a free-running, astable- multivibrator (oscillator) circuit. That configuration, offers three different outputs. The output pulses at the Q and Q output (pins 10 and 11, respectively) are the same as in the previous two circuits. The third output at pin 13 pulses twice as often as the outputs at 10 and 11. So, the circuit can be used to simultaneously provide both positive- and negative-trigger signals since the Q and Q output are never in the same state, and a clock frequency.


Astable-multivibrator
Click here to download the full size of the above Circuit.

Thus, the 4047 can replace both a simple oscillator (the 555, for instance) and a flip-flop in some applications.




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