Title:
SWITCHING ELEMENT AND SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JP3630797
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize a high isolation characteristic with a small-scale circuit constitution by providing an inductor forming a resonance circuit on the outside of a transmission line.
SOLUTION: A first transmission line between an input/output terminal RC and a reception terminal RX through which a weak signal inputted from an antenna 1 is transmitted to an amplifier and a second transmission line between a transmission terminal TX and the input/output terminal RC through which a transmission signal from the amplifier is transmitted to the antenna 1 exist. The first transmission line is provided with FETs 2 and 3, and the second transmission line is provided with FETs 4 and 5. An inductor 6 to constitute the resonance circuit is provided between the reception terminal RX and the transmission terminal TX on the outside of first and second transmission lines like a bridge between first and second transmission lines. Thus, a high isolation characteristic is obtained without degrading the insertion loss by the small-scale circuit constitution.
Inventors:
Naonori Uda
Toshikazu Hirai
Keiichi Honda
Tetsuro Sawai
Yasoo Harada
Toshikazu Hirai
Keiichi Honda
Tetsuro Sawai
Yasoo Harada
Application Number:
JP26135795A
Publication Date:
March 23, 2005
Filing Date:
October 09, 1995
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01P1/15; H03K17/693; H04B1/44; (IPC1-7): H01P1/15; H03K17/693; H04B1/44
Domestic Patent References:
| JP8204530A | ||||
| JP5327447A | ||||
| JP3237807A | ||||
| JP590935A | ||||
| JP6355601U | ||||
| JP6239305U |
Attorney, Agent or Firm:
Masamasa Shibano
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