Design of an EMI Self-Immune VML Transmitter in 0.18-$\mu$ m CMOS

This letter discusses an integrated voltage-mode logic (VML) transmitter demonstrating a superior self-immunity to electromagnetic interference (EMI). Both the proposed and typical transmitters were fabricated in the UMC 0.18- μm standard CMOS process. Using direct power injection measurement, the typical and proposed VML transmitters were subjected to EMI frequencies ranging from 100 kHz to 2 GHz and amplitudes up to 5-V peak. The proposed VML transmitter maintains an open eye diagram with a minimum eye height of 80 mV at the highest EMI amplitude, whereas the typical VML transmitter's eye opening completely closes for EMI frequencies from 700 kHz to 300 MHz and for EMI amplitudes exceeding 1.5-V peak.