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what are different types of parallel adders? what are its meritsand demerits?

on 2016-09-06 16:49:57   by Khushboo   on Information Technology  1 answers

Bikash

on 2016-09-15 09:30:00  

parallel adders are two types- 1) Carry Propagate or Ripple carry adder 2) Carry Look Ahead adder Merits: It is a combinational CKT,faster than serial adder .In one clock period all bits of two no are added. DEMERITS: 1) The delay becomes large,if the size of no to be added is increased. 2)The hardware cost is more then the serial adder because no of full adder needed is equal to the no of bits in occurrent.