发明授权
US09119968B2 Band stop filter employing a capacitor and an inductor tank circuit to enhance MRI compatibility of active medical devices 有权
带阻滤波器采用电容器和电感器电路来增强主动医疗器械的MRI兼容性

Band stop filter employing a capacitor and an inductor tank circuit to enhance MRI compatibility of active medical devices
摘要:
A band stop filter is provided for a lead wire of an active medical device (AMD). The band stop filter includes a capacitor in parallel with an inductor. The parallel capacitor and inductor are placed in series with the lead wire of the AMD, wherein values of capacitance and inductance are selected such that the band stop filter is resonant at a selected frequency. The Q of the inductor may be relatively maximized and the Q of the capacitor may be relatively minimized to reduce the overall Q of the band stop filter to attenuate current flow through the lead wire along a range of selected frequencies. In a preferred form, the band stop filter is integrated into a TIP and/or RING electrode for an active implantable medical device.
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