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MULTIPLIER TRICKS

by Ingo Cyliax

Start ı Implementing ı Optimization ı Signed and Unsigned Multipliers ı Sources and PDF

After my last articleıs excursion, Iım ready to get back into design issues. If youıll remember, I ended up discussing an FPGA evaluation module because my laptop Windows and design environment was scrambled and nonfunctional. Since then, I was able to reinstall Windows and my design tools, and I got almost everything to work. So, on to multipliers...

Iıve talked about adders in the past. Adders are fundamental to many digital designs because they are used for counters. Also, with adders and shifters itıs possible to implement any of the simple math functions. This month, I want to take a look at multipliers and some of the tricks I have up my sleeve to implement them.

As you know, multipliers multiply. That is, they form the product of two numbers. In particular, letıs look at integer multipliers. Multipliers are used commonly in signal processing applications. Digital filters, correlators, mixers, and various other DSP functions use multipliers. Donıt worry if you donıt know what these are, Iıll only be discussing the multiplier this time.

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