| 摘要 |
A multi-track magnetic transducer head having a set of transducing elements (78, 80, 82) connected in series is interconnected with driver means for selectively energising the transducing elements. The driver means comprises a plurality of parallel circuit paths (102, 100, 126, 124) connected between a voltage source (+V) and a constant current source (130). Each of the parallel circuit paths comprises first (84, 88, 92, 91) and second (87, 86, 90, 96) switching means connected in series via a respective circuit node (300, 302, 304, 306). Each transducing element (e.g. 78) is connected between an individual pair (300, 302) of the aforementioned circuit nodes. Control means comprising individual control devices (106, 108, 110, 112, 132, 134, 136, 138) enables the switching means to be selectively operated so that current (-IW1, +IW1) can be caused to flow in either direction through a selected transducing element or a selected group of adjacent transducing elements. A switch (150) in a shunt circuit path (148) can be operated to shunt current away from the transducing elements. |
