A control circuit for a bias source including a stand-by device.

The invention relates to a control circuit of a bias source (1) comprising a standby device (2) and a start-up aid device (3), whose respective outputs are connected to a control input (E) of the bias source (1), the start-up aid device (3) having a switch (MN5) for inhibiting its operation controlled by the bias source (1), said circuit comprising capacitive means (C) for reactivating the start-up aid device (3), upon a change of signal state ( "standby") for controlling standby indicating a need for reactivation of the bias source (1).