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                  NPP               Number System, Boolean Algebra and Logic Circuits              247


                                       A       B                C
                                                       B






                                                                                F



                  (ii) NOR-NOR Implementation:   Use  POS     (ii) NOR Bpåßb_o|Q>oeZ hoVw POS ê$n F =  . A  (B +  C )

                      Form:  F =  . A  (B +  C ). Draw Logic circuit  boH$a CgH$m _yb^yV JoQ>m| H$m n[anW ~ZmZo na:
                      using basic Gates:


                                       A       B              C
                                                       B




                                                                                 F





                      Convert OR into NOR by putting a bubble     OR JoQ> H$mo NOR _| ~XcmoŸ& BgHo$ {cE AND Ho$
                  at the output. But to cancel this bubble put a  BZnwQ> na EH$ ~~c cJmZm hmoJmŸ& Bgr Vah AND Ho$ Xygao
                  bubble at the input of AND. To convert AND  BZnwQ> na ~~c d NOT JoQ> cJmAmoŸ&
                  into bubbled AND, put one  more bubble at
                  other input and one NOT Gate in series with
                  the bubble.

                                      A       B              C
                                                      B




                                                                                  F




                      Now,  Convert NOT Gates into  shorted       A~ NOT Ho$ ñWmZ na em°Q>}S> NOR VWm ~~ëS>
                  NOR and Bubbled AND into NOR:               AND Ho$ ñWmZ na ^r NOR ~ZmZo na:
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