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Java Games: Flashcards, matching, concentration, and word search. |
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| LATCH | a circuit that captures and input state, transfers it to its output, and holds it in that state even after the input is changed. |
| Q | the “main” output of a latch or flipflop, similar to a Boolean Y. Not to be confused with the analog Q, quality of a tuned circuit |
| notQ | a second output which is exactly like the Q output, except that its polarity is reversed. That is, whenever Q is 1, notQ is 0. In text, often identified as nQ or -Q. In diagrams, identified as Q with a line over it. |
| SR LATCH | set / reset latch, a latch where “1” on the S (set) input sets Q, and “1” on the R (reset) input resets Q. Also known as a SC latch for set / clear. It is not permissible for S and R to both be 1 at the same time. |
| FLIPFLOP | a circuit that can be set up to alternate. With successive input pulses, Q goes high, low, high, low etc. |
| T FLIPFLOP | a flipflop that toggles, or alternates as described above. |
| JK FLIPFLOP | like an SR flipflop in most ways; when J is high, Q flips on the next clock, when K is high, Q resets on the next clock. However, J and K can both be high at once, in which case the JK flipflop toggles like a T-flipflop. Most JK flipflops also have set and clear inputs, which affect the outputs immediately. |
| BINARY COUNTER | also known as a ripple counter, a circuit that counts in binary: 0, 1, 10, 11, 100 and so on. A string of T flipflops with each notQ connected to the next flipflop's clock input makes a binary counter. |
| UP-DOWN COUNTER | a binary counter with a control input that can make the counter count either up or down. |
| MODULUS COUNTER | a counter that is designed to count up to a certain number, e.g. 5, 7, 13, 144, and then reset to zero and start the count over. |
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