Precise Digital Timing Controller Circuit

Published:2011/7/9 2:31:00 Author:Joyce | Keyword: Precise , Digital , Timing , Controller | From:SeekIC

As shown in the figure is a precise digital timing controller circuit, which is composed of a crystal oscillator circuit, a frequency divider, a counting circuit and a monostable trigger. The crystal oscillator circuit constitutes of a 14 bit binary serial count/distributor, a clock crystal (32768 Hz), C1, C2 etc.The crystal signal will be output through feet③(Q14) after being divided 214 times .Then it will be inverted by IC2 and then divided by double D flip-flop CC4013 (IC3) to be a signal of 1 Hz. The signal will be added to the CP end of IC4 as the control signal of the clock. IC4 is a 12 bit binary serial count/distributor CC4040, when the signal frequency of CP is 1 Hz ac, the 11 output ends Q4 ~Q9, Q12 ~ Q14 are to output pulse(phase step high level) of 2 seconds, 4 seconds, 8 seconds, 16 seconds, 32 seconds, 64 seconds, 128 seconds, 256 seconds, 512 seconds, 1024 seconds, 2048 seconds respectively.



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