A physiological signal measuring device and a physiological signal measuring method are provided. The physiological signal measuring device includes a first sensing electrode, a second sensing electrode, an amplifier, a calculator and a subtractor. The first sensing electrode has a first electrode impedance value. The first sensing electrode acquires the first electrode signal of a user. The second sensing electrode has a second electrode impedance value. The second sensing electrode acquires the second electrode signal of the user. The amplifier amplifies the second electrode signal to generate an amplified signal. The calculator generates a physiological signal according to the amplified signal and the first electrode signal. The subtractor subtracts the second electrode signal from the physiological signal to generate a biopotential differential signal.

A physiological signal measuring device and a physiological signal measuring method are provided. The physiological signal measuring device includes a first sensing electrode, a second sensing electrode, an amplifier, a calculator and a subtractor. The first sensing electrode has a first electrode impedance value. The first sensing electrode acquires the first electrode signal of a user. The second sensing electrode has a second electrode impedance value. The second sensing electrode acquires the second electrode signal of the user. The amplifier amplifies the second electrode signal to generate an amplified signal. The calculator generates a physiological signal according to the amplified signal and the first electrode signal. The subtractor subtracts the second electrode signal from the physiological signal to generate a biopotential differential signal.

The present disclosure provides a biometric ring comprising an inner surface configured to adjoin a living being and a plurality of conductors circumferentially arranged about the inner surface. The conductors are configured to emit current and measure voltage across conductor path pairs. The biometric ring determines corresponding conductor path resistances through the body and generates resistance maps from these measurements. A biometric reading is derived from the resistance maps, enabling non-invasive monitoring of physiological parameters.

The present disclosure provides a biometric ring comprising an inner surface configured to adjoin a living being and a plurality of conductors circumferentially arranged about the inner surface. The conductors are configured to emit current and measure voltage across conductor path pairs. The biometric ring determines corresponding conductor path resistances through the body and generates resistance maps from these measurements. A biometric reading is derived from the resistance maps, enabling non-invasive monitoring of physiological parameters.

A biomagnetic sensor that incorporates an integrated active noise cancellation unit that uses a gradiometer to remove ambient magnetic noise from a detection signal obtained from a tunnelling magnetoresistive (TMR) sensor unit that is indicative of a magnetic field adjacent to biological tissue. The ambient magnetic noise can thus be removed in real time at a front end of the sensor (e.g. as part of circuitry in the sensor body itself). The active noise cancellation technique proposed herein may be effective enough to enable the biomagnetic sensor to be used in an unshielded environment (i.e. an environment that is subject to the Earth's magnetic field, for example), which widens significantly the potential uses for the sensor.

A biomagnetic sensor that incorporates an integrated active noise cancellation unit that uses a gradiometer to remove ambient magnetic noise from a detection signal obtained from a tunnelling magnetoresistive (TMR) sensor unit that is indicative of a magnetic field adjacent to biological tissue. The ambient magnetic noise can thus be removed in real time at a front end of the sensor (e.g. as part of circuitry in the sensor body itself). The active noise cancellation technique proposed herein may be effective enough to enable the biomagnetic sensor to be used in an unshielded environment (i.e. an environment that is subject to the Earth's magnetic field, for example), which widens significantly the potential uses for the sensor.