| US 7,525,395 B2 | ||
| Step attenuator | ||
| Hyeon Seok Hwang, Gyunggi-do (Korea, Republic of); Yoo Sam Na, Seoul (Korea, Republic of); Moon Sun Kim, Gyunggi-do (Korea, Republic of); Byeong Hak Jo, Gyunggi-do (Korea, Republic of); and Kyoung Seok Park, Gyunggi-do (Korea, Republic of) | ||
| Assigned to Samsung Electro-Mechanics Co., Ltd., Suwon, Gyunggi-Do (Korea, Republic of) | ||
| Filed on Jun. 17, 2008, as Appl. No. 12/140,980. | ||
| Claims priority of application No. 10-2007-0072248 (KR), filed on Jul. 19, 2007. | ||
| Prior Publication US 2009/0021331 A1, Jan. 22, 2009 | ||
| Int. Cl. H01P 1/22 (2006.01) | ||
| U.S. Cl. 333—81R [327/308] | 6 Claims |
| 1. A step attenuator comprising:
first and second resistors connected in series with each other between an input terminal and an output terminal;
a first switch connected in parallel between both ends of one of the first and second resistors;
a second switch having one end connected to the input terminal;
a third resistor having one end connected to the other end of the second switch and the other end connected to a ground terminal;
fourth and fifth resistors having one set of ends connected to a connection node between the first resistor and the second
resistors and other set of ends connected to a ground terminal; and
a third switch having one end connected to the output terminal;
a sixth resistor having one end connected to the other end of the third switch and the other end connected to the ground terminal;
a fourth switch having one end connected to one of the input terminal and the output terminal; and
a seventh resistor having one end connected to the other end of the fourth switch and the other end connected to one terminal
between the input and output terminals while the one terminal is not connected to the fourth switch.
|