the digital pulse width test circuit

Published:2011/7/20 21:44:00 Author:Borg | Keyword: pulse width, test circuit | From:SeekIC

The definition of the test circuit is 10μs, the Max test width is 99.99ms. CC4518 is the adding counter, the pulsed under test is added on its EN terminal, the 100kHz reference signal is added on the CL terminal, only when EN=1 does the counter work. CC4511 works as the decoder. When EN changes from 0 to 1, the LE of CC4511 locates the counting number firstly, so the stable reading can be acquired. Then the counter is reset after it is differentiated by the phase reverser and RC.



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