| 摘要 |
A shaper with independent adjustable pulses/pause length comprises two counters each of which has a clock input, parallel load input, asynchronous reset input, a circuit comprising in series connected resistor and capacitor, inverter, start-stop device comprising D-flip-flop with asynchronous reset, first and second AND elements, three-input element OR. Instead of standard binary counters, counters performed using shift registers are incorporated, each of which has two series inputs, two mode set inputs performed using a circuit of a maximal length sequence generator ( i.e has two-input inversion modulo two addition element}, first inputs of which are connected to outputs of registers low-order bit (zero bit), second inputs are connected to outputs of high-order (third) bit, outputs are connected to outputs of high-order (third) bit, output of every element is connected to series input with shift to low-order bits of the corresponding register, first and second four-input OR inversion modulo two addition element, two-input OR-NOT element. |
