'Ripple adder' diaporamas de présentation

David Culler Electrical Engineering and Computer Sciences University of California, Berkeley

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VHDL

VHDL. V HSIC H ardware D escription L anguage VHSIC V ery H igh S peed I ntegrated C ircuits. What is VHDL?. A very verbose, complex, and powerful language for design , simulation , verification and synthesis of digital systems

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ECE 3110: Introduction to Digital Systems Chapter 5 Combinational Logic Design Practices

ECE 3110: Introduction to Digital Systems Chapter 5 Combinational Logic Design Practices. X-OR gates and Parity circuits Comparators Adders, subtractors, ALUs. Previous class . Building blocks Encoders/priority encoders Three state buffers/inverters Multiplexers/demultiplexers.

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Computing Systems

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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

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Adders

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Half Adder (1-bit)

Half Adder (1-bit). A. B. S. Half Adder. C. A. Sum. B. Carry. Half Adder (1-bit). Full Adder. A. B. S. Full Adder. Carry In (Cin). Cout. Full Adder. AB. Cin. AB. AB. Cin. Cin. Or. A. S. B. Cin. Cout. Full Adder. H.A. H.A. S. A. A. S. A. S. Half Adder.

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ASIC 121: Practical VHDL Digital Design for FPGAs

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ASIC 121: Practical VHDL Digital Design for FPGAs

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EECS150 - Digital Design Lecture 10 - Combinational Logic Circuits Part 1

EECS150 - Digital Design Lecture 10 - Combinational Logic Circuits Part 1. Feburary 26, 2002 John Wawrzynek. Combinational Logic (CL) Defined. y i = f i (x0 , . . . . , xn-1), where x, y are {0,1}. Y is a function of only X. If we change X, Y will change immediately (well almost!).

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Programming for GCSE Topic 9.2: Circuits for Adding

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Lecture 19 - Computer Arithmetic

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A problem with the ALU

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Goal: Build an ALU

Goal: Build an ALU. The Arithmetic Logic Unit or ALU is the device that performs arithmetic and logical operations in the computer. We will build it out of 4 basic building blocks. AND gate: performs the AND operation on 2 signals. OR gate: performs the OR operation on 2 signals.

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Generation of Optimal Bit-Width Topology of Fast Hybrid Adder in a Parallel Multiplier

Generation of Optimal Bit-Width Topology of Fast Hybrid Adder in a Parallel Multiplier. Sabyasachi Das Synplicity Inc. Sunil P. Khatri Texas A&M University (sunilkhatri@tamu.edu). Presented by David Pan, UT Austin. What is a Multiplier?. IC block that perform multiplication operation

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Project 2: Cadence Help

Project 2: Cadence Help. Fall 2005 EE 141 Ke Lu. Design Phase. Estimate delay using stage effort. Example: 8 bit ripple adder driving a final load of 16. Rough estimate of Area. Sum over the size times LE of every gate. Schematics: Using Hierarchy. 1. Transistor Level.

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Four-Bit Adder- Subtractor

Four-Bit Adder- Subtractor. Four-Bit Adder- Subtractor. (4 bit ripple adder). Four-Bit Adder- Subtractor. (4-bit carry- lookahead adder). Phase 1. Build it on breadboard Time: Tuesday ( 2/19/12,Tues), 1-3:45 pm Must demo your FPGA to Chio to receive credit. Phase 2.

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