| 摘要 |
<p>The rectangular pulse setting generator of permanent frequency is used in pulse engineering. It has the facility of changing the fill factor of the timing of the pulses in a wide range. The generator comprises a single-cycle timer (10), time-setting circuit and a counter flip-flop (9). The time setting circuit comprises a capacitor (11), potentiometer (12), two resistors (13, 14) and two semiconductor diodes (15, 16). The time-setting capacitor (11) is connected by one of its outputs to the mobile output of the potentiometer (12) and to the short-connected outputs ( 2, 6 & 7) of timer (10). The fixed outputs of the potentiometer are coupled to one of the outputs of the two resistors, the other two outputs of which are connected to the anodes of two semiconductor diodes, the anodes of which are connected to the two outputs of the counter flip-flop. The counter input of the flip-flop is connected to the output of the timer, and the outputs of the flip-flop are also outputs of the generator. 1 claim, 2 figures</p> |
