| 摘要 |
<p>A stepping switch is operated to preselected positions in response to pulse groups, each consisting of a number of pulses corresponding to a position. Amplifying and pulse shaping circuitry responds to the incoming pulses and rejects unwanted components such as noise, spurious pulses, etc. The desired output pulses of the pulse shaping circuit actuate driver circuit means to produce power output pulses of a magnitude sufficient to actuate the stepping switch. The circuitry distinguishes the spacing between successive pulses of a group from the spacing between groups of pulses, so that the desired stepping switch output terminal is activated only at the conclusion of a pulse group, intermediate contacts remaining inactive during the stepping sequence. At the conclusion of a pulse group, the stepping switch is returned to its home position to await the next group of pulses. The arrangement is of particular advantage in applications wherein dial pulses in a telephone system are employed for data transmission or to effect operation of remote terminal equipment such as computer system, radio paging systems, etc.</p> |
