| 摘要 |
A positioner (1) includes: a displacement amount detector (11) that outputs a pair of detection signals; a multi-layered board (15) that propagates a pair of detection signals; a circuit board (20) on which an electronic circuit (12) generating a control signal for controlling a valve opening of the regulating valve, on the basis of the pair of detection signals is formed; and a housing (10) that accommodates at least the multi-layered board and the circuit board. The multi-layered board includes a first interconnection layer (L1) having a first interconnection pattern (30) formed therein, and a second interconnection layer (L2) that has a pair of signal interconnections formed therein and is disposed on the first interconnection layer through an interlayer insulation film. The first interconnection pattern is electrically connected to the housing and is formed so as to overlap the pair of signal interconnections formed in the second interconnection layer. |
