01.09.2016 Views

1445326735900-0

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Starting electronics<br />

Figure 10.36 A completed truth table for the experiment of Figure 10.33<br />

If we compare the truth tables (in either Figure 10.35 or Figure<br />

10.36) with the truth table in Figure 10.14 we should see that<br />

the outputs are the same for the same inputs. (OK, yes, the<br />

inputs and output are presented in a different order — but<br />

the results are identical.)<br />

In other words, we have used an inverter along with a NOR<br />

gate (by merely inverting the output of the NOR gate) to create<br />

an OR gate.<br />

For completeness, Figure 10.37 shows a three input device<br />

based on this circuit, together with its truth table.<br />

Figure 10.37 (a) using an inverter and a NOR gate to create an OR gate;<br />

(b) its truth table to prove this<br />

232

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!