| 摘要 |
A shielded three-terminal flat-through EMI/energy dissipating filter includes an active electrode plate through which a circuit current passes between a first terminal and a second terminal, a first shield plate on a first side of the active electrode plate, and a second shield plate on a second side of the active electrode plate opposite the first shield plate. The first and second shield plates are conductively coupled to a grounded third terminal. In preferred embodiments, the active electrode plate and the shield plates are at least partially disposed with a hybrid flat-through substrate that may include a flex cable section, a rigid cable section, or both. |
| 主权项 |
1. A filter circuit for an active implantable medical device, comprising:
a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing and a hermetic feedthrough terminal; b) an AIMD electronic circuit disposed within the conductive housing; c) a conductor electrically coupling through the hermetic feedthrough terminal in nonconductive relation to the conductive housing and electrically coupled to the AIMD electronic circuit, the conductor defined as comprising a first node and a second node disposed in series along the conductor, the first node disposed closer to the hermetic feedthrough terminal and the second node disposed closer to the AIMD electronic circuit, the conductor further defined as comprising a first length between the hermetic feedthrough terminal and the first node, a second length between the first node and second node, a third length between the second node and the AIMD electronic circuit; d) a frequency selective energy diversion circuit configured to divert high-frequency MRI energy away from the conductor to the conductive housing for dissipation of high-frequency MRI energy, the diversion circuit electrically connected between the first node and the conductive housing; e) an impeding circuit configured to raise the high-frequency impedance of the conductor, the impeding circuit electrically connected in series along the second length of the conductor disposed between the first and second nodes; f) a broadband low pass filter for attenuating RF energy connected along the third length, wherein the broadband low pass filter comprises a capacitor, an “L” filter, a “T” filter, a “n” filter, a “LL” filter, a “5 element” filter or an “n” element filter; and g) wherein the first length of the conductor is disposed between a first and second shield plate |
