| 发明名称 |
MAGNETIC FIELD DETECTION DEVICE |
| 摘要 |
A magnetic field detection device includes: a resonance circuit having a winding coil for converting a magnetic field signal of an alternating magnetic field into a voltage signal and having a capacitor connected in parallel to the coil; an element connected in series to an output stage of the resonance circuit; and a low noise amplifier connected to an output stage of the element. The element has a reactance whose sign is opposite to that of an imaginary part of an impedance of the resonance circuit at a detected frequency of the alternating magnetic field. An absolute value of a combined impedance of the resonance circuit and the element is smaller than an internal resistance of the coil. |
| 申请公布号 |
US2016161573(A1) |
申请公布日期 |
2016.06.09 |
| 申请号 |
US201615046505 |
申请日期 |
2016.02.18 |
| 申请人 |
OLYMPUS CORPORATION |
发明人 |
SUZUKI Yusuke |
| 分类号 |
G01R33/06 |
主分类号 |
G01R33/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A magnetic field detection device comprising:
a resonance circuit having a winding coil for converting a magnetic field signal of an alternating magnetic field into a voltage signal and having a capacitor connected in parallel to the coil; an element connected in series to an output stage of the resonance circuit; and a low noise amplifier connected to an output stage of the element, wherein the element has a reactance whose sign is opposite to that of an imaginary part of an impedance of the resonance circuit at a detected frequency of the alternating magnetic field, and an absolute value of a combined impedance of the resonance circuit and the element is smaller than an internal resistance of the coil. |
| 地址 |
Tokyo JP |
