Sensor circuit device for measuring a bio-potential and/or a bio-impedance of a body, including a master circuit, and at least two active bi-electrodes connected to, and remotely powered by, the master circuit via single-wire first connector. The sensor circuit device further includes a single passive current electrode being connected to the master circuit via single-wire second connector. The sensor circuit device cooperates with a biological signal amplifier configured to measure a bio-potential and/or a bio-impedance. Each active bi-electrode is connectable to the biological signal amplifier via the first connector, such that a bio-potential of the body is measurable between the two active bi-electrodes when the active bi-electrodes and the single current electrode are in contact with a surface of the body.

A sensor device for potential and/or impedance measurements on a body of a user, including a central electronic unit and at least a first sensor and a second sensor. Each sensor is connected to the central electronic unit by a one-wire connector. Each sensor includes a current electrode and a potential electrode destined to be in contact with a surface of the body. The master includes a master current source configured to circulate a master current in the one-wire connector, the current electrode of the at least first and second sensors and the body, when the sensors are in contact with a surface of the body. Each sensor includes a harvesting device configured to harvest energy from the circulating master current in a powering frequency band.

A sensor device for potential and/or impedance measurements on a body of a user, including a central electronic unit and at least a first sensor and a second sensor. Each sensor is connected to the central electronic unit by a one-wire connector. Each sensor includes a current electrode and a potential electrode destined to be in contact with a surface of the body. The master includes a master current source configured to circulate a master current in the one-wire connector, the current electrode of the at least first and second sensors and the body, when the sensors are in contact with a surface of the body. Each sensor includes a harvesting device configured to harvest energy from the circulating master current in a powering frequency band.

The embodiments of the present disclosure provide a signal processing circuit and a signal processing method. The signal processing circuit may include a control circuit, a switch circuit, an analog circuit, and at least two signal acquisition circuits. The at least two signal acquisition circuits may be configured to acquire at least two-channel target signals. The switch circuit may be configured to control conduction between the at least two signal acquisition circuits and the analog circuit, so that the target signal acquired by a part of the at least two signal acquisition circuits may be transmitted to the analog circuit at the same time. The analog circuit may be configured to process the received target signal. The control circuit may be configured to receive the processed target signal and sample the processed target signal.

An embodiment is a biosignal measurement system including two electrode devices, a biosignal generation device, and a right-leg drive device. Each electrode device has a first electrode, a non-inverting amplification circuit, a quantization circuit, a first wireless transmitter, an FM transmitter, an FM receiver, an adjustment circuit, and a power supply. The biosignal generation device has a first wireless receiver, an arithmetic circuit, a midpoint potential calculation circuit, and a second wireless transmitter. The right-leg drive device has a second wireless receiver, an amplifier circuit, and a second electrode. The electrode devices measure and process biopotentials, transmitting information wirelessly and via FM signals. The biosignal generation device receives this information, generates waveforms, calculates midpoint potentials, and transmits them to the right-leg drive device, which applies the amplified potential to the body.

An embodiment is a biosignal measurement system including two electrode devices, a biosignal generation device, and a right-leg drive device. Each electrode device has a first electrode, a non-inverting amplification circuit, a quantization circuit, a first wireless transmitter, an FM transmitter, an FM receiver, an adjustment circuit, and a power supply. The biosignal generation device has a first wireless receiver, an arithmetic circuit, a midpoint potential calculation circuit, and a second wireless transmitter. The right-leg drive device has a second wireless receiver, an amplifier circuit, and a second electrode. The electrode devices measure and process biopotentials, transmitting information wirelessly and via FM signals. The biosignal generation device receives this information, generates waveforms, calculates midpoint potentials, and transmits them to the right-leg drive device, which applies the amplified potential to the body.

Systems and methods for detection of stroke and its types, comprising: electrodes, on an EEG headset (101), placed to record EEG signals; a client-side signal processing engine configured to: compute power for each of signals; segregate processed signal, from each of said electrodes, into five baskets, by processing signals from each of said electrodes such that there is a Delta basket, a Theta basket, an Alpha basket, a Beta basket extract features from a frequency component of said transformed signals in order to obtain stroke ratios; receive, as a first output, a first set of processed signals with power ratings for determination of a stroke incident as a function of power rating ratios; receive, as a second output, a second set of processed signals with relative powers for determination of a type of stroke as a function of said first relative power (RDP) and said second relative power (RAP).

Systems and methods for detection of stroke and its types, comprising: electrodes, on an EEG headset (101), placed to record EEG signals; a client-side signal processing engine configured to: compute power for each of signals; segregate processed signal, from each of said electrodes, into five baskets, by processing signals from each of said electrodes such that there is a Delta basket, a Theta basket, an Alpha basket, a Beta basket extract features from a frequency component of said transformed signals in order to obtain stroke ratios; receive, as a first output, a first set of processed signals with power ratings for determination of a stroke incident as a function of power rating ratios; receive, as a second output, a second set of processed signals with relative powers for determination of a type of stroke as a function of said first relative power (RDP) and said second relative power (RAP).

A Direct Current (DC) coupled analog front end for an electrocardiogram (ECG) measuring device is provided that includes an amplifying stage including a first op-amp that is configured to receive a signal input from an ECG patch at a first input port and a feedback signal at a second input port and to produce an amplified output of an ECG signal via a first output port; a feedback stage including a second op-amp that is configured to receive the amplified output and produce the feedback signal at a second output port; and a DC source, coupled between the signal input from the ECG patch and the first input port.

A Direct Current (DC) coupled analog front end for an electrocardiogram (ECG) measuring device is provided that includes an amplifying stage including a first op-amp that is configured to receive a signal input from an ECG patch at a first input port and a feedback signal at a second input port and to produce an amplified output of an ECG signal via a first output port; a feedback stage including a second op-amp that is configured to receive the amplified output and produce the feedback signal at a second output port; and a DC source, coupled between the signal input from the ECG patch and the first input port.