| 摘要 |
A shaper of meander-type pulses with adjustable pulse length and fixed number, which is equal to four comprises two reversible binary countdown counters each of which having clock input, synchronous parallel load enable input, loading data inputs, computing enable input, asynchronous reset input, overflow output, an inverter, first and second two-input elements OR, a circuit comprising in series connected resistor and capacitor, a start/stop device comprising a synchronous flip-flop having asynchronous reset input, first and second elements AND. A second invertor, two J-K flip-flops having by two J and K inputs and asynchronous reset input are incorporated, AND inputs of invertors are united. |
