| 摘要 |
The invention relates to a circuit arrangement for the defined discharge of a capacitive load, which has the following features: a first connecting terminal (K 1 ) for connection of the load (C 1 ), a second connecting terminal (K 2 ) for application of a predetermined potential (V 2 ), a third connecting terminal (IN) for application of a discharge signal, a first switching element (P 1 ), having a load path and a control connection, the load path of which is connected between the first and second connecting terminals (K 1 , K 2 ) and a second switching element (P 2 ), having a load path and a control connection, the load path of which is connected between the first connecting terminal (K 1 ) and a terminal for reference potential (GND), the first switching element (P 1 ) being driven in a manner dependent on a switching state of the second switching element (P 2 ), a drive circuit for the second switching element (P 2 ), to which the discharge signal (Sin) is fed and which comprises a comparator arrangement, the comparator arrangement comprising a voltage-controlled third switching element (P 3 ) having a load path and a control connection, the load path of which is connected between one (K 2 ) of the first and second connecting terminals (K 1 , K 2 ) and the control connection of the second switching element (P 2 ), and a bias voltage source (P 4 , P 5 , P 6 ; D 4 ) connected between the other (K 1 ) of the first and second connecting terminals (K 1 , K 2 ) and the control connection of the third switching element (P 3 ).
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