Noise Reduction Termination for RFI Induced Channel Resonance using Common-mode Choke and Differential Signal Balancer

The impact of the channel resonance due to the external RF noise is analyzed for the differential transmission line sandwiched between the common-mode filters (CMFs). The channel resonance causes a differential noise by the mode conversion. We confirm that the problem of the channel resonance can be removed by the differential signal balancer embedded in the metal layer of silicon LSI (DSB-EIM). The combination of DSB-EIM and a common-mode choke coil (CMC) can effectively remove external RF noise.