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R-S flip flop


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Well, flip flops are bistable multivibrators. An input trigger causes the two outputs to "flip-flop" states. The ouputs are usually labeled Q and /Q (not Q). There are two transistors inside the flip-flop arranged symetrically. The input trigger is applied to both at the same time, but due to very slight imbalances in the circuits, one will conduct first, making one output go low , and feeding back a signal to the base of the other transistor, which turns it off, in turn causing the other output to go high. I think I'm explaining that correctly. Even when the triggering pulse is removed, the circuit "latches" itself in that state, until another triggering pulse comes along and "flip-flops" the circuit again. This, in effect, becomes a storage for one bit of information.


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