Abstract
For fetal ECG monitoring, a balanced-chopper low-power-reuse front-end amplifier is used. The amplifier discussed here provides separate noise control for each station while minimizing the overall power usage and simultaneously upgrades at both current and voltage fields for low-voltage reusable current. The different supply voltages used are in the range of .3, 0.6 & 1.2 V. This low-emf amplifier is designed at 0.18m CMOS standard, for its power management circuit. And these Amp cores have a high noise-efficiency-factor (NEF=1.74) and a high power-efficiency-factor (PEF=1.74). Testing shows that the amplifier's core could produce a quantity of noise of 0.34 Vrms in the range of 0.7 Hz to 182 Hz with a power consumption of 1.17 W. The amplifier consumes 1056W of power with its circuit, resulting in a PEF of 1.41. ECG tests such as pre-recording of both fetal and adults are also used to test the amplifier.