A FOUR CHANNELS ELECTROHYSTEROGRAPH WITH INDIVIDUALLY SELF TUNING AMPLIFIER GAINS

The paper presents the specialized measurement system aimed on reliable recording of electrohysterographical (EHG) signals in pregnant women. System offers efficient attenuation of the mains interference and DC offset, together with adjustable gain, allowing to suit its sensitivity to the level of signal available in the particular patient. The noise level is further reduced by optimized bandwidth and optical fiber based connection between the EHG device and recording computer.