Interface having an improved transmitting branch

摘要

The invention relates to a digital bus interface for an operating device for a lighting means comprising: a transmitting branch and a receiving branch, wherein the receiving branch has a current source (Q90, Q95, R90, R91), which can be fed from a bus that carries voltage in the idle state, wherein the current source supplies at least the transmitting branch with energy and the transmitting branch has an optocoupler (U91), wherein an electrical energy store (C95) is provided in the receiving branch, which electrical energy store is charged by the current source and discharges via a resistor (100) in series with the secondary side of the optocoupler (U91) of the transmitting branch.

主权项

1. A digital bus interface for an operating device for a lighting means, wherein:
the interface comprises a transmitting branch and a receiving branch, the receiving branch comprises a current source (R90, R91, Q90, Q95) which can be fed from a bus carrying voltage in the non-operating state, the current source (R90, R91, Q90, Q95) supplies at least the transmitting branch with energy, and the transmitting branch comprises an optocoupler (U91), the receiving branch comprises a further optocoupler (U90), in the receiving branch, a switch (Q96) is provided which is arranged in such a manner that the primary side of the optocoupler (U90) of the receiving branch is selectively switched into a conducting condition, so long as the voltage at the input of the receiving branch exceeds a defined threshold value.