Figure 15From: Multistage Quadrature Sigma-Delta Modulators for Reconfigurable Multi-Band Analog-Digital Interface in Cognitive Radio DevicesInterference rejection ratios for desired signals with three-stage QΣΔM, using 8-bit quantizers at each stage, as a function of blocker signal power. Frequency-flat ("Flat STF") and mirror-frequency-rejecting STF ("Selective STF") designs are simulated.Back to article page