| 摘要 |
A shaper of periodic sequence of pulses with adjustable width and fixed pause comprises two binary counters, first of which is a reversible counterdown counter having a clock input, a counting mode enable input, an asynchronous reset, an overflow output, two OR elements, an inverter, a circuit comprising in series connected resistor and capacitor, a start-stop device comprising a D-flip-flop with asynchronous reset, first and second AND elements. A second summation counter inner structure is simplified due to prevention of element circuit of enable/disable mode, and correspondingly, inputs of synchronous parallel load. |
