JPS5561113A - Ultra-high frequency band negative feedback amplifier - Google Patents
Ultra-high frequency band negative feedback amplifierInfo
- Publication number
- JPS5561113A JPS5561113A JP13475978A JP13475978A JPS5561113A JP S5561113 A JPS5561113 A JP S5561113A JP 13475978 A JP13475978 A JP 13475978A JP 13475978 A JP13475978 A JP 13475978A JP S5561113 A JPS5561113 A JP S5561113A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- output
- phase
- use band
- ultra
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/345—Negative-feedback-circuit arrangements with or without positive feedback using hybrid or directional couplers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE:To make it possible to obtain a feedback amplifier with a low distortion factor and high stability, by setting the amount of the phase of a feedback loop nearly equal to a value odd-number greater than the half of wavelength equivalent to an in-use band frequency. CONSTITUTION:Signals from input terminal 1 are inputted to transistor amplifier 5 by way of directional coupler 2, BPF3 and isolator 4. The output of amplifier 5 is led to output terminal 7 by way of directional coupler 6. Part of the output of coupler 6 is branched and then supplied to a feedback circuit composed of variable resistance attenuator 10 and variable phase shifter 11. Here, BPF3, consisting of three stages and less, is set to an in-use frequency and the amount of the phase of the feedback loop is set nearly equal to a value odd-number greater than the half of wavelength equivalent to the in-use band frequency. Adjustments for this setting are made by phase shifter 11. Consequently, distortion is improved in addition to gain stability within the in-use band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13475978A JPS5561113A (en) | 1978-11-01 | 1978-11-01 | Ultra-high frequency band negative feedback amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13475978A JPS5561113A (en) | 1978-11-01 | 1978-11-01 | Ultra-high frequency band negative feedback amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5561113A true JPS5561113A (en) | 1980-05-08 |
| JPS6145886B2 JPS6145886B2 (en) | 1986-10-11 |
Family
ID=15135887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13475978A Granted JPS5561113A (en) | 1978-11-01 | 1978-11-01 | Ultra-high frequency band negative feedback amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5561113A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60180118U (en) * | 1984-05-08 | 1985-11-29 | 日本電気株式会社 | Ultra-high frequency band negative feedback amplifier |
| JPWO2017033962A1 (en) * | 2015-08-27 | 2018-06-28 | 国立大学法人大阪大学 | Fluctuation oscillator, signal detection device, and display device |
-
1978
- 1978-11-01 JP JP13475978A patent/JPS5561113A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60180118U (en) * | 1984-05-08 | 1985-11-29 | 日本電気株式会社 | Ultra-high frequency band negative feedback amplifier |
| JPWO2017033962A1 (en) * | 2015-08-27 | 2018-06-28 | 国立大学法人大阪大学 | Fluctuation oscillator, signal detection device, and display device |
| US10404237B2 (en) | 2015-08-27 | 2019-09-03 | Osaka University | Fluctuation oscillator, signal detection device, and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6145886B2 (en) | 1986-10-11 |
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