Bridges balanced by variable voltages from multichannel generators

Two bridge circuits for relating three-terminal or two-terminal pair impedance standards of any kind are described, balancing of which is made by voltages supplied from stable generators. In the first case two voltages are supplied, amplitude and phase of one of them being controllable. Four voltages are used in the second case and only their amplitudes are changed in the course of the balancing process. As a particular form of the second circuit, a coaxial quadrature bridge for relating resistance and capacitance standards has been realized and tested.