(54) CIRCUIT TOPOLOGY FOR MULTIPLE LOADS
(75) Inventors: Shou-Kuo Hsu, Taipei Hsien (TW);
Hsiao-Chuan Tu, Taipei Hsien (TW);
Yu-Chang Pai, Taipei Hsien (TW)
(73) Assignee: Hon Hai Precision Industry Co., Ltd.,
Tu-Cheng, Taipei Hsien (TW)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 38 days.
(21) Appl.No.: 11/965,744
(22) Filed: Dec. 28, 2007
(65) Prior Publication Data
US 2009/0146759 Al Jun. 11, 2009
(30) Foreign Application Priority Data
Dec. 6, 2007 (CN) 2007 1 0202864
(51) Int. CI.
H01P 5/12 (2006.01)
H03H 7/38 (2006.01)
(52) U.S. CI 333/125; 333/130; 333/100
(58) Field of Classification Search 333/100,
333/125-128, 130, 134, 136, 32, 33 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS 3,904,990 A * 9/1975 La Rosa 333/128
A circuit topology for multiple loads includes a driving terminal, a first node coupled to the driving terminal via a main transmission line, a second node coupled to the first node via a first branch transmission line, a first receiving terminal coupled to the first node via a second branch transmission line, a third node coupled to the second node via a third branch transmission line, and a second receiving terminal coupled to the second node via a fourth branch transmission line. The second branch transmission line is longer than the first transmission line, and a first resistor is connected in the second branch transmission line. The third branch transmission line is longer than the fourth branch transmission line, and a second resistor is connected in the third branch transmission line.
3 Claims, 4 Drawing Sheets