BOOLEAN ALGKHUA AND t'lKCUIT DKSIGN 



299 



Tho final contact savings arc acliic\'(Ml l)y comlnning the \'ari<)ns out- 

 |)ut j)atlis. The c()ml)inc(l translation circnit that appears (o he as i-c- 

 (Inccd as possible is shown in V\'j^. (1. Note that certain toiins ol' the 

 in(li\-i(lual output paths comhine nior(> i-eadily than others. Foi- example 

 Fig. 4c and ')b coml)ine moi'c readily with th(> reniainiiifj; i)aths than 

 Fig. 41) and oa. Xot(> also tliat sometimes it is not the most reduced loim 

 of the indix'idual output paths that pei-mits efficient combining. Tiiis is 



- I 



^-CP 



"0" LEAD 



(a) 



X 



"0" LEAD 



(b) 



"0" LEAD 



(c) — (d) 



Fig. 4 — The "0" leail of tlu> translating circuit. 



J-p ^ 1 



- E C D 



B "l" LEAD 



(a) 



JT 



T^ — '"T 



E B c D 

 l-X 1 X x-i 



(b) 



"l" LEAD 



-rn 



H A- 



(c) 



'2"LEAD 



xn 



"4" LEAD 



B 



D B c E 



H \ X X- 



(d) 



X 



^ B D^ _ " 7 " L E A D 



X 



C ? ,^ " ZO" LE AD 



-X I X - — 



(e) 

 Fig. 5— The "1, 2, 4, 7, and ZO" leads of the translating circuit. 



