Abstract: The impedance cardiography device comprises an impedance measuring unit, connected to the human body to be measured, a differentiator, a comparator and a microcontroller integrated with an analog-to-digital converter, characterized by that the device further comprises two peak voltage detection units with different polarities (positive and negative), the strobing outputs of them being connected to the digital (binary) inputs of the microcontroller and the analog hold outputs to the inputs of the analog-to-digital converter.

Abstract: A method and device for synthesizing binary waveforms, wherein the initial analogue waveform is first converted into the segments with discrete levels, then each said discrete level section is in turn converted into a binary pulse of the same time duration as the given segment, and the average value of the generated pulse is proportional to the average value of the given initial waveform over the time duration of the given segment.

Abstract: The invention is related to the field of measurement electronics and related to the measurement of complex transfer functions (e.g. of impedance), especially in the presence of large disturbances and for measuring of small changes of the characteristics of the object under test. The goals of the proposed invention are achieved by detuning of the excitation and reference signals, e.g. by adding incremental phase-shift to the excitation signal to generate the reference signal.

Abstract: The invention belongs to the field of medical technology and relates to wearable electrical devices and a method for using the device to measure and monitor the patient's vital signs during the postoperative period in a hospital. The device enables more accurate measurement of the electrical bioimpedance of the patient's tissues, primarily arteries and other organs, which in turn provides an opportunity to determine the vital signs, such as the volume, frequency and nature of the heart beating and breathing, indicating whether the patient's health condition is improving or deteriorating towards the life-threatening direction. The device is distinguished by the methodology for creating and deploying a system of active electrodes specific to the measurement site of the body, and by the means for generating, forming and processing the electrical current and voltage signals necessary for measuring the electrical bioimpedance including the methods for applying the technology.

Abstract: A method and device for synthesizing binary waveforms, wherein the initial analogue waveform is first converted into the segments with discrete levels, then each said discrete level section is in turn converted into a binary pulse of the same time duration as the given segment, and the average value of the generated pulse is proportional to the average value of the given initial waveform over the time duration of the given segment.

Abstract: The impedance cardiography device comprises an impedance measuring unit, connected to the human body to be measured, a differentiator, a comparator and a microcontroller integrated with an analog-to-digital converter, characterized by that the device further comprises two peak voltage detection units with different polarities (positive and negative), the strobing outputs of them being connected to the digital (binary) inputs of the microcontroller and the analog hold outputs to the inputs of the analog-to-digital converter.

Abstract: The invention is related to the field of measurement electronics and related to the measurement of complex transfer functions (e.g. of impedance), especially in the presence of large disturbances and for measuring of small changes of the characteristics of the object under test. The goals of the proposed invention are achieved by detuning of the excitation and reference signals, e.g. by adding incremental phase-shift to the excitation signal to generate the reference signal.