it is 4 bit ripple carry adder. it is one type of counter you can say. in which carry is added. it is vhdl code and its waveform which is run in altera quars II.

LIB.DLS
ripadder.acf
ripadder.fit
ripadder.hif
ripadder.mmf
ripadder.ndb
ripadder.pin
ripadder.pof
ripadder.rpt
ripadder.scf
ripadder.snf
RIPADDER.sym
ripadder.vhd
U0607202.DLS
U2625627.DLS
U4710298.DLS

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