| 摘要 |
<p>The voltage supply device supplies a bus system which carries a DC voltage for the on-board network supply of subscriber stations, and an AC voltage for an information transfer, the in form of pulses. The voltage supply device consists of a circuit equivalent to of a voltage source (1) and an inductance connected in series. The inductance is replaced through a circuit (2) which comprises an operational amplifier (3) connected in such way, that an internal resistance is formed for the AC information transfer voltage, which approximates the characteristic impedance of a bus system to be connected. The internal resistance for the DC voltage is arranged to be comparatively small, preferably smaller than 1 Ohm.</p> |
