Agilent Technologies, Inc.

Smith + Nephew

David Michael Bray

Felix Clarence Quintanar

A system can include excitation pads that can apply an excitation signal to tissue of a patient. The excitation pads can be connected to an electronic circuit that communicates the excitation signal to the excitation pads. The system can include a measurement sensor that can measure voltage of the tissue. The system can include a controller that can determine impedance of the tissue. The controller can be in communication with the excitation pads, the electronic circuit, and the measurement sensor. The controller can generate the excitation signal. The controller can obtain a current measurement of the excitation signal after it has been communicated through at least a portion of the electronic circuit. The current measurement can correspond to the excitation signal before it is applied to the tissue. The controller can determine impedance of the tissue based on the voltage measurement and the current measurement of the excitation signal.

Systems and methods for measuring tissue impedance

A method and apparatus for providing improved electromagnetic compatibility between a power source () and a switching element () in a switched mode power supply includes a device () for measuring an electrical variable, for example current, that fluctuates as the switching element () switches power received from the power source (). A signal injector () is arranged to generate an electrical signal, for example current, of substantially the same amplitude, but opposite polarity, as the measured current, and to inject it between the power source () and the switching element () so as to tend to minimize fluctuations in the electrical variable.

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Edinburgh, United Kingdom

David Michael Bray