| 摘要 |
1. Circuit arrangement for processing electrical signals supplied by an inductive detector delivering signals having a variable amplitude proportional to the speed or rotation of target coupled in rotation to a shaft, in particular the crankshaft of an internal combustion engine, of the kind comprising means for causing an impedance of the circuit arrangement to vary as a function of the speed and processing means (7, 8), characterized in that, in order to reconcile a high sensitivity with a low input impedance, use is made of an input stage (4) comprising electronic means (4) processing the current signal and producing a non-linear input characteristic by rapid switching of the input impedance from a first relatively low value to a second higher value, the input stage (4) delivering its signals to the processing means (7, 8). |
