JPS6430315A - High frequency attenuator - Google Patents
High frequency attenuatorInfo
- Publication number
- JPS6430315A JPS6430315A JP18714487A JP18714487A JPS6430315A JP S6430315 A JPS6430315 A JP S6430315A JP 18714487 A JP18714487 A JP 18714487A JP 18714487 A JP18714487 A JP 18714487A JP S6430315 A JPS6430315 A JP S6430315A
- Authority
- JP
- Japan
- Prior art keywords
- condition
- fets
- attenuating quantity
- attenuation
- attenuating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To reduce a high frequency distortion by combining a field effect transistor FET serially or in parallel, and using respective FETs in either of an ON condition or an OFF condition mainly. CONSTITUTION:When a desired attenuating quantity is 0dB, FETs 101-105 are all in the ON condition (condition of minimum attenuating quantity). This is realized by making the potential of attenuating quantity control terminals 117-121 into '0' V. Thereafter, in accordance with the prescribed attenuating quantity, the attenuation is executed by the combination of the ON condition and the OFF condition (condition of maximum attenuating quantity) of the FETs 101-105. In any case, the gate potential of FETs 106 and 107 is controlled by an impedance control terminal 122 and the input output impedance is matched. Thus, since only two points of the ON condition (minimum attenuation) and the OFF condition (maximum attenuation) of the FETs 101-105 can be used, the low distortion is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18714487A JPS6430315A (en) | 1987-07-27 | 1987-07-27 | High frequency attenuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18714487A JPS6430315A (en) | 1987-07-27 | 1987-07-27 | High frequency attenuator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6430315A true JPS6430315A (en) | 1989-02-01 |
Family
ID=16200889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18714487A Pending JPS6430315A (en) | 1987-07-27 | 1987-07-27 | High frequency attenuator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6430315A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19511370A1 (en) * | 1994-03-28 | 1995-10-05 | Toshiba Kawasaki Kk | Analogue variable attenuator with FET switch and three current sources |
WO2005064791A1 (en) * | 2003-12-25 | 2005-07-14 | Matsushita Electric Industrial Co., Ltd. | Variable attenuator |
JP2006173868A (en) * | 2004-12-14 | 2006-06-29 | Nippon Telegr & Teleph Corp <Ntt> | Variable attenuator |
CN103001661A (en) * | 2011-09-16 | 2013-03-27 | 瑞萨电子株式会社 | Antenna switch and communication device |
-
1987
- 1987-07-27 JP JP18714487A patent/JPS6430315A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19511370A1 (en) * | 1994-03-28 | 1995-10-05 | Toshiba Kawasaki Kk | Analogue variable attenuator with FET switch and three current sources |
WO2005064791A1 (en) * | 2003-12-25 | 2005-07-14 | Matsushita Electric Industrial Co., Ltd. | Variable attenuator |
JP2006173868A (en) * | 2004-12-14 | 2006-06-29 | Nippon Telegr & Teleph Corp <Ntt> | Variable attenuator |
CN103001661A (en) * | 2011-09-16 | 2013-03-27 | 瑞萨电子株式会社 | Antenna switch and communication device |
JP2013066056A (en) * | 2011-09-16 | 2013-04-11 | Renesas Electronics Corp | Antenna switch and communication apparatus |
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