Pulse generator with Wiegand wire - positioned in alternating magnetic field to produce pulses for amplification, by single N-P-N transistor

摘要

The pulse generator has a Wiegand wire, an alternating magnetic field being produced in its vicinity. The output voltage pulses are taken from the end of the wire (1). The ends of the wire are connected to the input of a pulse amplifier. Alternatively, the wire is integrated into the amplifier. The alternating magnetic field may be produced by permanent magnets (3,5) moving w.r.t. the wire (1) or it may be produced by an electromagnet supplied by a.c. The Wiegand wire changes its direction of magnetisation to produce a pulse. The wire can be integrated into the amplifier consisting of a npn transistor (2) in an emitter-earth circuit. A collector resistor (RC) and a resistor (RBC) in the base-collector circuit are provided as well as a resistor (RBE) in the base-emitter circuit.