Title:
BALUN SIGNAL TRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2008/130796
Kind Code:
A3
Abstract:
A system 20 includes an unbalanced device 22, a balanced device 24, and a balun (balanced-unbalanced) signal transformer 26 interposed between devices 22 and 24. The balun signal transformer 26 includes a balanced external port section 32 formed by ports 40 and 42. The balun signal transformer 26 includes a symmetric transformer 48 having a balanced port 50 formed by terminals 52 and 54. Terminal 52 is electrically interconnected with port 40, and an inductor 64 is interposed between terminal 54 and port 42. The inductor 64 shifts a phase of a signal component 72 at terminal 54 to balance substantially one hundred eighty degrees out-of-phase with a signal component 70 at terminal 52.
Inventors:
LIU LIANJUN (US)
LI QIANG (US)
LI QIANG (US)
Application Number:
PCT/US2008/058967
Publication Date:
September 15, 2011
Filing Date:
April 01, 2008
Export Citation:
Assignee:
FREESCALE SEMICONDUCTOR INC (US)
LIU LIANJUN (US)
LI QIANG (US)
LIU LIANJUN (US)
LI QIANG (US)
International Classes:
H01P5/10; H01F19/06
Foreign References:
| US5416451A | 1995-05-16 | |||
| US20040017266A1 | 2004-01-29 | |||
| US20060091970A1 | 2006-05-04 |
Attorney, Agent or Firm:
KING, Robert L. et al. (MD: TX32/PL02Austin, TX, US)
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