Very High Accuracy Hyperbolic Tangent Function Implementation in FPGAs

The paper presents in detail a relatively simple implementation method of the hyperbolic tangent function, particularly targeted for FPGAs. research goal proposed was to examine usage approximation ordinary or Chebyshev polynomials function. Several miscellaneous versions have been considered. They differ polynomial degree, number intervals which domain function is divided, etc. Both floating-point and fixed-point implementations presented. An impact on FPGA resources utilization calculations time has also briefly analyzed. Special attention paid accuracy It turned out that applying method, very high can be achieved, while simultaneously maintaining reasonable short time. an effective alternative other encountered methods such as CORDIC. Additionally, presented hardware architecture more versatile easily adapted mathematical functions.