- Patent Title: Direct current (DC)-DC converter having a multi-stage output filter
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Application No.: US14665366Application Date: 2015-03-23
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Publication No.: US09722492B2Publication Date: 2017-08-01
- Inventor: Chris Levesque , William David Southcombe , David E. Jones , Scott Yoder , Terry J. Stockert
- Applicant: RF Micro Devices, Inc.
- Applicant Address: US NC Greensboro
- Assignee: Qorvo US, Inc.
- Current Assignee: Qorvo US, Inc.
- Current Assignee Address: US NC Greensboro
- Agency: Withrow & Terranova, P.L.L.C.
- Main IPC: H04K1/02
- IPC: H04K1/02 ; H02M3/156 ; H03F3/193 ; H03F1/02 ; H03F3/195 ; H03F3/21 ; H03F3/24 ; H03F3/60 ; H03F3/68 ; H03F3/72 ; H03F3/191 ; H03F3/19 ; H04L25/03 ; H04L25/06 ; H04W88/06

Abstract:
A direct current (DC)-DC converter that includes a first switching converter and a multi-stage filter is disclosed. The multi-stage filter includes at least a first inductance (L) capacitance (C) filter and a second LC filter coupled in series between the first switching converter and a DC-DC converter output. The first LC filter has a first LC time constant and the second LC filter has a second LC time constant, which is less than the first LC time constant. The first LC filter includes a first capacitive element having a first self-resonant frequency, which is about equal to a first notch frequency of the multi-stage filter.
Public/Granted literature
- US20150194884A1 DIRECT CURRENT (DC)-DC CONVERTER HAVING A MULTI-STAGE OUTPUT FILTER Public/Granted day:2015-07-09
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