| 摘要 |
Electronic circuit arrangements for generating at least two different constant currents at a load resistor, including a bridge circuit (especially an H bridge=H bridge circuit) having at least (in the case of an H bridge, precisely) four legs, and switching elements and a bridge branch between the legs, in which the load resistor is inserted, and at least two current sources which are connected to the legs of the bridge circuit in such a manner that it provides for current via one of the legs through the bridge branch and through a leg, connected to the other end of the bridge branch, with a corresponding switch position, the at least two current sources being adjustable if desired. The use of the circuit arrangement for generating such stimulation currents and corresponding procedures currents and methods. |
| 主权项 |
1. An electronic circuit arrangement for generating at least two different constant currents at a load resistor R, comprising:
a bridge circuit having at least first, second, third and fourth legs (3, 4, 5, 6), and switching elements S1 and S2 and a bridge branch (7) between the legs, in which the load resistor R is inserted, and at least first and second current current sources (IS1, IS2) connected to the legs of the bridge circuit in such a manner that the current sources provide for a current via one of the legs through the bridge branch (7) through one of the legs, connected to an other end of the bridge branch (7) in the case of a corresponding switch position, the first current source (IS2) in each case provides for a first current I1 (i2′) via the first leg ((3) or (4)), which is connected to one end of the bridge branch (7), through the bridge branch (7) and through the second leg ((4) or (3)), connected to the other end of the bridge branch (7) opposite to the first leg ((3) or (4)), when a first one of the switching elements (S1) in the first leg ((3) or (4)) and an optional second switching element, which can be provided separately or integrated in the first current source (IS2), in the second leg ((4) or (3)) is correspondingly switched on, the second current source (IS1) case provides for another current I2 (i1′) via the third leg ((5) or (6)), which is connected to the end of the bridge branch (7) which is opposite to the end of the bridge branch (7) to which the first leg ((3) or (4)) is connected, through the bridge branch (7) and through the fourth leg ((6) or (5)), connected to the other end of the bridge branch (7), when a third one of the switching elements (S2) in the third leg ((5) or (6)) and an optional fourth switching element, which is provided separately or integrated in the second current source (IS1) in the fourth leg ((6) or (5)) is correspondingly switched on, when in each case the load resistor R renders the bridge branch (7) to have continuity.
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