NE555N/NE555D

and may be simplified into the following equation.

S=I/C (17)

In other words, the gradient of the linear ramp function appearing across the capacitor

can be obtained by using the constant current flowing through the capacitor.

If the constant current flow through the capacitor is 0.215mA and the capacitance is

0.02μ F, the gradient of the ramp function at both ends of the capacitor is S = 0.215m/0.022

μ

= 9.77V/ms.

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