Carry Select Adder Circuit with a Successively Incremented Carry Number Block

Addition usually impacts widely the overall performance of digital systems and a crucial arithmetic function. In electronic applications, adders are most widely used. Applications where these are used are multipliers, DSP to execute various algorithms like FFT, FIR and IIR. This paper reports a Conditional Carry Select (CCS) adder circuit with a Successively-Incremented-Carry-Number Block (SICNB) structure for low-voltage VLSI implementation. Owing to the Successively-Incremented-Carry-Number Block (SICNB) structure, the new 16-bit SICNB CCS adder provides a 37% faster speed as compared to the conventional conditional carry select adder based on the SPICE results.

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International Journal of Engineering Research and Applications (IJERA)