Optimizing Integrated Circuit Applications with Digital IIR Filtering Architectures

In this research, a high-performance IIR filter for low-power DSP applications is implemented and realized using a MATLAB system generator. There are numerous ways to implement IIR filters, including the Direct Form-I(DF-I), Direct Form-II(DF-II), Cascade, and Parallel Forms. All of these structures offer a selection area for a suitable realization that will decrease power consumption and increase the speed of digital filters. This particular work uses a Xilinx FPGA device to implement a 5th order Low pass IIR filter in DF-I, DF-II, and Cascade Form (DF-I/DF-II). Cascade (Direct Form-I) realization is the best way to build higher order IIR filters where power is a primary limitation, while cascade (Direct form-II), corresponding power analysis is also conducted, the technique is optimal if the area is a main constraint.