“…The CS algorithm, developed by Yang and Deb in 2009, is one of the most powerful population-based optimization search techniques [38]. Because of its global convergence property [39][40][41][42], the CS has been successfully applied to optimize many real-world engineering design problems, such as wind turbine blades [43], antenna arrays [44][45][46][47][48][49][50][51][52], power systems [53], travelling salesman [54], structural design problems [55], wireless communications [56][57], flow shop scheduling problem [58], job shop scheduling problem [59], model order reduction [60], control systems [61], transmission lines [62], and image processing [63]. The main purpose of this paper is to report a new approach and extend our work in [49][50][51][52][53] and explore the performance of the CS algorithm in the design and optimization of IIR DDs and DIs in comparison with other methods.…”