CIRCUIT ARRANGEMENT FOR INLINE VOLTAGE SUPPLY, USE OF SUCH A CIRCUIT ARRANGEMENT AND DEVICE HAVING SUCH A CIRCUIT ARRANGEMENT

摘要

In a circuit arrangement for in-line supply of voltage to an electrical or electronic apparatus located in the region of a DC line, a parallel circuit of two diodes oriented in anti-parallel is arranged in the line. When a direct current is flowing between terminals of the circuit arrangement, the anti-parallel diodes permit a small voltage drop between the terminals, irrespective of the direction of flow of the current, which voltage drop is limited to the forward voltage of the diode that is currently forward biased. The voltage drop across the anti-parallel diodes is tapped by a supply subcircuit. A semiconductor switch can be connected in parallel with the anti-parallel diodes, which switch is controlled by a voltage-reduction subcircuit to minimize the power dissipation of the circuit arrangement.

主权项

1. A circuit arrangement, comprising:
a diode disposed in a line and forming first and second terminals of the circuit arrangement: a supply subcircuit that taps the voltage drop across the diode; and a further diode connected in parallel with the diode, wherein forward-bias directions of the diode and of the further diode are oriented anti-parallel to each other, wherein when a direct current is flowing between the first and second terminals of the circuit arrangement, the anti-parallel diodes permit a small voltage drop between the terminals, irrespective of the direction of flow of the current, which voltage drop is limited to the forward voltage of the diode that is currently forward biased.