| 发明名称 | Electric circuit evaluation method | ||
| 摘要 | The electric circuit evaluation method according to the present invention is characterized in that a designated electric circuit is placed inside a shield structure, a noise signal for a malfunction test is inputted to the designated electric circuit, a short-circuit is established between a ground of the shield structure and a ground of a noise source for inputting a noise signal for a malfunction test to the designated electric circuit, and the ground of the designated electric circuit and the ground of the shield structure are isolated. | ||
| 申请公布号 | US9417274(B2) | 申请公布日期 | 2016.08.16 |
| 申请号 | US201414301536 | 申请日期 | 2014.06.11 |
| 申请人 | ROHM CO., LTD. | 发明人 | Hiraga Noriaki;Kido Katsunori |
| 分类号 | G01R31/00 | 主分类号 | G01R31/00 |
| 代理机构 | Cantor Colburn LLP | 代理人 | Cantor Colburn LLP |
| 主权项 | 1. An electric circuit evaluation method comprising: placing a designated electric circuit inside a shield structure; and inputting a noise signal for a malfunction test from a noise source to the designated electric circuit; and monitoring, with a controller, an output signal outputted from the designated electric circuit based on the noise signal in order to accumulate malfunction information about the designated electric circuit; wherein a short-circuit is established between a ground of the shield structure and a ground of the noise source and the ground of the designated electric circuit and the ground of the shield structure are isolated; wherein the noise source comprises: a noise signal generator configured to generate the noise signal;a separator configured to separate the noise signal into a forward wave component that goes to the designated electric circuit and a reflected wave component that returns from the designated electric circuit;a forward wave sensor configured to measure a forward wave power of the forward wave component;a reflected wave sensor configured to measure a reflected wave power of the reflected wave component; anda transmitter configured to transmit the forward wave power and the reflected wave power to the controller; and wherein the controller is configured to calculate and record a power of the noise signal inputted to the designated electric circuit based on a difference between the forward wave power and the reflected wave power. | ||
| 地址 | Kyoto JP | ||