of the thyristors and the diodes define two terminals 13 and 14 of application of an a c voltage vac to be rectified a capacitive element c is generally connected between terminals 11 and 12 to smooth the rectified voltage possibly an inductive element not shown may be interposed at the bridge input for example between terminal 13 and the junction point of thyristor th 1 and diode d 1 such an element is particularly used to filter the current drawn from the bridge input an inductive element may also be placed at the output between for example terminal 11 and the common point of the two anodes of thyristors th 1 and th 2 this inductive element may be placed upstream or downstream of capacitor c this type of element may be used for example in a switched mode power supply circuit used to correct the power factor of the current drawn from the network thyristors th 1 and th 2 are cathode gate thyristors intended to be controlled from a signal ct in such a controllable rectifying bridge a control voltage directly originating from a microcontroller cannot be applied neither can more generally a voltage directly referenced to reference potential 12 due to the reference of the cathodes of thyristors th 1 and th 2 which is on the side of the most positive potential terminal 11 of the rectified voltage this imposes using a conversion element 15 of galvanic isolation transformer or optocoupler type to convert the reference of the control signal such an embodiment increases the production costs of a controllable rectifying bridge fig2 is an electric diagram of an embodiment of.