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Design a timing circuit that provides an output signal that stays on for exactly twelve clock cycles. A start signal sends the output to the 1 state, and after twelve clock cycles the signal returns to the 0 state.

Respuesta :

letmeanswer

Explanation:

( Check attachment for the design )

When capacitor is charging

[tex]V_{c} = V_{cc} ( 1- e^{\frac{t}{Rc} })[/tex]

At

t = [tex]t_{0}[/tex]

[tex]V_{C}[/tex] becomes [tex]\frac{2V_{cc} }{3} = V_{cc} ( 1- e^{\frac{-t0}{Rc} } )[/tex]

[tex]\frac{e^{t0} }{Rc} = 3[/tex]

[tex]T_{0} = 1.1 Rc[/tex]

[tex]T_{0} = 12 = 1.1 Rc[/tex]

Rc = 10.909

So , Assume R = 10 MΩ

                     C = 1.0909 μ F

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