Analog-to-analog conversion with high normal mode rejection ratio for power-line-frequency noise

A simple method that ensures high normal mode rejection ratio (NMRR) for power-line-frequency noise in dual-slope integration and voltage-to-frequency (V-F)-based A/D converters is proposed. Experimental results for normal mode rejection ratios above 90 dB achieved in an instrument designed with implementation of this method are also reported.<
>