Wideband bioimpedance meter with an active electrodes

For the diagnosis of functional state and structure of biological objects with weakly expressed irregularities it is important to quickly and accurately determine the amplitude- and phase-frequency characteristics in the extended band up to 5 MHz. Developed instrument designed to measure the impedance of the object on four-electrode method. The device uses the frequency synthesizer, integrally fabricated amplitude-phase detector and active electrodes by which the voltage controlled current source and the input buffer amplifiers with low input capacitance are located in close proximity to the studied biological object.