8.3 High-Frequency Noise Immunity

In order to suppress irradiated high-frequency signals, the five Rx channels of the chip are connected to the electrodes via serial 10 kΩ resistors, as close as possible to MGC3140. The 10 kΩ resistor and the MGC3140 input capacitance are building a low-pass filter with a corner frequency of 3 MHz. An additional ferrite bead is recommended to suppress the coupling of RF noise to the Tx channel (e.g., 600Ω at 100 MHz).