Image Rejection Filter Details (Gen 3/DFE) - 2.6 English

Zynq UltraScale+ RFSoC RF Data Converter v2.6 Gen 1/2/3/DFE LogiCORE IP Product Guide (PG269)

Document ID
PG269
Release Date
2024-05-30
Version
2.6 English

The coefficients and frequency response of the IMR interpolation filter are shown as follows.

IMR Filter Coefficients

N(bit) = 12
Center Tap: 4096 for low pass; -4096 for high pass
First Half: 10,0,-23,0,48,0,-89,0,154,0,-256,0,432,0,-813,0,2588
Figure 1. RF-DAC IMR Filter Frequency Response

The following image shows a zoomed plot of the cross region between high and low pass filter modes.

Figure 2. IMR Filter Frequency Response-Zoom