Patent Number: 7,825,750

Title: EMI filter for controlling cutoff frequency

Abstract: Disclosed relates to an electromagnetic interference (EMI) filter. Capacitance and resistance or inductance of an EMI filter, which includes a resistor and a capacitor or an inductor and a capacitor, can be controlled, such that a cutoff frequency can be freely controlled without manufacturing a separate EMI filter according to a characteristic of a desired cutoff frequency. Further, an intelligent EMI filter that can be applied to a surge protection device, which includes an ESD protection function as well as the EMI filter, is provided, such that a process can be simplified and costs can be reduced.

Inventors: Lee; Kye Nam (Yongin-Si, KR), Park; Young Jin (Seongnam-Si, KR), Kim; Jin Hyung (Icheon-Si, KR), Yang; Hyun Kyu (Yeongi-Gun, KR), Kim; Yoo Ran (Gongju-Si, KR)

Assignee: Petari Incorporation

International Classification: H03H 7/01 (20060101); H03H 7/06 (20060101)

Expiration Date: 2019-11-02 0:00:00