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Accuracy-Configurable Adder for Approximate Arithmetic Designs

Accuracy-Configurable Adder for Approximate Arithmetic Designs

Accuracy-Configurable Adder for Approximate Arithmetic Designs. Andrew B. Kahng, Seokhyeong Kang VLSI CAD LABORATORY, UC San Diego 49 th Design Automation Conference June 6 th , 2012. Outline. Background and Motivation Accuracy Configurable Adder Design Experimental Setup and Results

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Adders

Adders

Taylor Ragan Danielle Lorentz Katie Henley.

By lars (134 views)

Adders

Adders

Adders. Used to perform addition, subtraction, multiplication, and division (sometimes) Half-adder adds rightmost ( least significant ) bit Full-adder adds all other bits, since a 1 may be carried into it. Use carry-out from one adder as the carry-in for the next adder

By major (183 views)

Adders

Adders

Adders. Adders. Basic Ripple Adders Faster Adders Sequential Adders. The Half Adder. Half Adder Input is limited to 2 bits HS = X xor Y = X•Y’ + X’•Y CO = X•Y Time for the Half Adder? 1 gate delay A gate delay of an xor for the half sum

By wells (129 views)

Adders

Adders

Adders. Binary Adders. Arithmetic circuit Addition Subtraction Division Multiplication. 0 + 0 = 0 0 + 1 = 1 1 + 0 = 1 1 + 1 = 10. One bit in sum. Two bit in sum. Half Adder. A combinational circuit that performs the addition of two bits. Two inputs and two outputs.

By kevina (176 views)

Adders

Adders

Adders. Adders. Basic Ripple Adders Faster Adders Sequential Adders. The Half Adder. Half Adder Input is limited to 2 bits HS = X xor Y = X•Y’ + X’•Y CO = X•Y Time for the Half Adder? 1 gate delay A gate delay of an xor for the half sum

By melisande-faure (85 views)

Adders

Adders

Adders. Full adder. 4-bit ripple adder. Subtractor from adder. Carry look-ahead adder. Previous inputs are in this logic here to speed – up the carry propagation. 74x283 4-bit binary adder. G and P bits go to all previous bits. 74x283 4-bit binary adder.

By kail (325 views)

Adders

Adders

Adders. Building an Adder. The Boolean operations can be built electronically using transistors. Applying an electrical current to a terminal is the equivalent to 1 or True . No current means 0 or False .

By dorcas (142 views)

Adders

Adders

Adders. Full-Adder. The Binary Adder. Express Sum and Carry as a function of P, G, D. Define 3 new variable which ONLY depend on A, B. Generate (G) = AB. Propagate (P) = A. B. Å. Delete =. A. B. S. C. D and P. Can also derive expressions for. and. based on. o.

By haley-blair (306 views)

Adders

Adders

Adders. Lecture L7.1 Section 7.1. Adders. Half Adder Full Adder TTL Adder. A . 0 . S . 0 . B . 0 . C . 1 . Half Adder. A . B . S . C . 0 . 0 . 0 . 1 . 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1. Dec Binary 1 1 +1 +1 2 10. Multiple-bit Addition.

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Adders

Adders

Lecture 7 Carry look ahead adders, Latches, Flip-flops, registers, multiplexors, decoders Digital Works intro PH 3 : Appendix B.6-9. Adders. Last time we developed a 32 bit ripple adder. It is not an efficient adder, although simple to understand, so how can we improve its performance.

By emma-chambers (154 views)