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A diode protect cmos circuit

2016-09-16 19:03  
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The CMOS digital circuit used to produce a osicillator, with pulse low frequency frorm. We use R and C are a lot of period time. it must have a diode to prevent current flow feedback.
In picture the oscillator circuit, we use the CD40106 and 74HCT132.The D1 and D2 connected to the input terminal of the twin IC respectively.These diodes should be outside the IC, because if the diode within the IC, when too much current flow will cause the loss diode and IC too.

A diode protect cmos circuit


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