Rectifying circuit

A rectifying circuit comprising first and second input terminals for receiving input currents which can exhibit a difference, which difference can be of a first or a second polarity, an output terminal, an electric supply terminal, a first current circuit connected between the first input terminal and the supply terminal, a second current circuit connected between the second input terminal and the supply terminal, current mirror circuit means coupling said first and second current circuits together so as to maintain substantially equal currents in said first and second current circuits, said current mirror circuit means including means responsive to the polarity of the difference between the currents applied to the first and second input terminals for making the first current circuit low-ohmic relative to the second current circuit for the first polarity of said difference whereby the current applied to the first input terminal is reproduced in the second current circuit by the current mirror circuit means, and for making the second current circuit low-ohmic relative to the first current circuit for the second polarity of said difference whereby the current applied to the second input terminal is reproduced in the first current circuit by the current mirror circuit means, third and fourth current circuits connected between the first and second input terminals, respectively, and the output terminal, said third and fourth current circuits each having a unidirectional current flow direction which are the same and each comprise the main current path of a transistor having a current output electrode coupled to the output terminal.