• K. Geetha
• K. Avinash Kumar

The increasing complexity of the DSP systems demanding higher computational performance in its architecture. But the traditional DSP arithmetic has limits in terms of speed of calculations. Moreover, in some applications, speed is more important than accuracy. To further enhance performance, approximate arithmetic circuits are designed with some loss of accuracy to reduce energy consumption and increase speed. These approximate circuits have been considered for error-tolerant applications. This paper proposes an FIR filter based on Modified Rounding Based Approximate Multiplier (ROBAM). In this Multiplier, the operands are rounded to the nearest exponent of two and used hybrid adder at the addition stage. This proposed Multiplier lead to simplification of multiplication operation, thus reducing area and increasing speed. As the Multiplier is the slowest element in the system, it affects the performance of the overall FIR filter. The proposed modified ROBA multiplier based FIR filter was compared with ROBA multiplier based FIR filters. The results have shown a significant reduction in the FIR filter area with proportional improvement in the multiplier speed. The Filter was synthesized and simulated using the Xilinx ISE environment.

Approximation, ROBAM, FIR Filter, DSP

"Efficient Design of FIR Filter using Modified ROBA Multiplier", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 9, page no.d416-d422, September-2021, Available :http://www.jetir.org/papers/JETIR2109345.pdf

"Efficient Design of FIR Filter using Modified ROBA Multiplier", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 9, page no. ppd416-d422, September-2021, Available at : http://www.jetir.org/papers/JETIR2109345.pdf