计数器

• The dmac is equipped with a counter-register for each device .
  对于每一个设备，DMAC都备有计数器。
• This type of counter is called a parallel-carry synchronous counter .
  这种计数器称为并行进位同步计数器。
• The advantage of the modified ring counter is that it is self-starting .
  改进的环形计数器的优点是可以自行起动。
• An adjustable high voltage supply to operate the counter is necessary .
  必须备有一台供给计数器用的可调高压电源
• Those of the other pulse should be subtracted to the content of the counter .
  另一列脉冲则应从计数器中的数中减去。
• It is built into the counter, and can be exposed by movement of a shutter .
  它装在计数器中，移去挡片，就可以产生照射。
• The operation of scintallator counters, on the other hand, depends upon excitation .
  另一方面，闪烁计数器是依靠激发过程工作的。
• The duration of the quenching pulse should exceed the recovery time of the counter .
  淬火脉冲的持续时间应当超过计数器的恢复时间。
• The radiation intensity through the motor is determined with a scintillation counter .
  通过发动机的放射强度可用闪光计数器来确定。
• The second scheme, in fig 4-16, uses a counter to advance the digit count .
  第二种方案（如图4-16所示）是使用一个计数器进行数字计数。