US 12,113,437 B2
Power noise filter and supply modulator including the same
Jeong Kwang Lee, Hwaseong-si (KR); Young Hwan Choo, Daejeon (KR); and Dong Su Kim, Hwaseong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Apr. 7, 2022, as Appl. No. 17/658,317.
Claims priority of application No. 10-2021-0087558 (KR), filed on Jul. 5, 2021.
Prior Publication US 2023/0006543 A1, Jan. 5, 2023
Int. Cl. H03H 1/00 (2006.01); H02M 1/096 (2006.01); H02M 1/44 (2007.01); H03H 9/52 (2006.01); H03H 9/64 (2006.01)
CPC H02M 1/44 (2013.01) [H02M 1/096 (2013.01); H03H 1/0007 (2013.01); H03H 9/52 (2013.01); H03H 9/6489 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A power noise filter comprising:
a band stop filter; and
a low pass filter,
wherein,
the band stop filter includes an inductor and a first capacitor, which are connected in parallel between first and second nodes,
the first node receives a first voltage, which is filtered by the band stop filter to thereby generate a second voltage at the second node, and
the low pass filter includes the inductor and a second capacitor, wherein the second capacitor has: (i) one end directly connected to the second node or directly connected to a first end of a resistor and a third node, wherein a second end of the resistor is directly connected to the second node, and (ii) an opposite end of the second capacitor is connected to a ground source.