Analysis of Flexible Multiplier Using Razor Based Dynamic Voltage Scaling for Filter Design

In this paper, we present flexible multiprecision multiplier that combined variable precision, parallel processing (PP), razor based dynamic voltage scaling (DVS), and dedicated MP operand scheduling to provide optimum performance for variety of operating conditions. All of the building blocks of proposed flexible multiplier can either work as independent small precision multiplier or parallel to perform higher-precision multiplier. While still maintain full through-put, the dynamic voltage and frequency scaling management unit configures the multiplier to operate at the proper precision and frequency. Adapting to the run-time workload for targeted application, that flexible multiplier can used to design IIR filter for DSP application. Razor flip-flops together with a dithering voltage unit then configure the multiplier to achieve the lowest power consumption. The single-switch dithering voltage unit and razor flip-flops help to reduce the voltage margin and over head typically associated to DVS to lowest level. Finally, the proposed high speed flexible multiplier can further benefits from an operand scheduler that rearranges the input data, hence determine the optimum voltage and frequency operating conditions for minimum for power consumption. As well suited to design IIR filter design for DSP application. KeywordsComputer arithmetic, dynamic voltage scaling, low power design, multi-precision multiplier.