This paper contains some problems of synthesis and analysis of the metrological simulators of impedance, suitable for using as the measures in impedance meters. There are presented two types of simulators for reproducing the impedances represented in Cartesian coordinates: with current control and with voltage control. The reproduced impedance can possess any character and have the separate regulation of the components. For synthesis of the simulator structures, the formal–structural method is applied. Studies of the stability conditions of the proposed simulators are carried out and the conditions of their optimal application in the resonance meters of impedance components are defined. The advantages of the proposed devices are the possibility of reproducing of impedance with any character without switching in its circuit, absence of the adjustable reactive elements, high exactitude and simplicity of practical realization. The presented devices are suitable for application both in the simple and cheap automatic impedance meters and in the high-accuracy meters of impedance components.