| 摘要 |
The instrument can be used in automatic control systems, computer hardware, and navigation for measurement of magnetic fields. The instrument provides a simpler design, has low power consumption; the external magnetic field may vary in frequency, but the amplitude of the output signal will not, thereby eliminating the need for a subsequent analogue-to-digital converter for further digital processing. The instrument contains n-channel field-effect transistors (1) and a winding with centre tap (2) wound onto a core (3) of soft magnetic material with a high magnetic permeability that depends on the external magnetic field. One tap of the winding is connected to the minus terminal of the positive power source (4), while the other tap is connected to the gate of field-effect transistor (1), and the middle tap is connected to the source of transistor (2). The drain of transistor (1) is connected to the plus terminal of the positive power source.<IMAGE>
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