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tiger_programmable_logic_card [2019/05/13 23:50]
jon [Clock]
tiger_programmable_logic_card [2019/05/14 00:09]
jon [Clock]
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 ==== Clock ==== ==== Clock ====
  
-To create a free-running clock with user-selectable period and duty cycle you can combine two non-retriggerable one-shot cells. ​ The first cell's trigger is connected to logic high, but because it is non-retriggerable it will simply trigger itself whenever it has, thus outputting a pulse once per delay period. ​ That pulse triggers a second one-shot which generates the clock output whose duration sets the time the output signal is high (i.e. the duty cycle is the ratio of the one-shot duration with the delay period).+To create a free-running clock with user-selectable period and duty cycle you can combine two non-retriggerable one-shot cells. ​ The first cell's trigger is connected to logic high, but because it is non-retriggerable it will simply trigger itself whenever it has, thus outputting a pulse once per delay period. ​ That pulse triggers a second one-shot which generates the clock output whose duration sets the time the output signal is high (i.e. the duty cycle is the ratio of the one-shot duration with the delay period).  From the 4kHz internal clock it is possible to generate up to 2kHz clock by this means.
  
 --> Script: clock signal on BNC1 output # --> Script: clock signal on BNC1 output #
tiger_programmable_logic_card.txt ยท Last modified: 2019/05/24 16:54 by jon