JPS61134106A - Negative feedback amplifier - Google Patents

Negative feedback amplifier

Info

Publication number
JPS61134106A
JPS61134106A JP25690984A JP25690984A JPS61134106A JP S61134106 A JPS61134106 A JP S61134106A JP 25690984 A JP25690984 A JP 25690984A JP 25690984 A JP25690984 A JP 25690984A JP S61134106 A JPS61134106 A JP S61134106A
Authority
JP
Japan
Prior art keywords
electric power
distortion
coupler
signal
terminal
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
Application number
JP25690984A
Other languages
Japanese (ja)
Inventor
Sunao Takagi
直 高木
Yukio Ikeda
幸夫 池田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP25690984A priority Critical patent/JPS61134106A/en
Publication of JPS61134106A publication Critical patent/JPS61134106A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE:To improve distortion characteristic without lowering gain by providing a mechanism that takes out only distorted electric power from a part of input electric power that does not contain a distortion component and a part of output electric power that contains the distortion component in a negative feedback circuit. CONSTITUTION:The only signal component is taken out from a coupler 10, and a signal that includes distortion due to non-linear action of a main amplifier 1 is taken out from a coupler 3. When phase and frequency of a signal from a coupler 7 are made to specified values by a phase adjuster 8 and an amplifier 9, signal electric power from a terminal 11 of the coupler 10 and signal electric power from a terminal 12 are composed, and the signal electric power can be outputted to only a terminal 13. Distortion component of output electric power inputted to the terminal 12 is not influenced by electric power of only signal component inputted to the terminal 11. Accordingly, a part of distortion electric power is outputted to a terminal of the coupler 10. The distortion electric power is negative fed back to the main amplifier 1 through a phase adjuster 5 and a coupler 4. However, signal electric power is not negative fed back.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、混変調歪み特性を改善するために、負帰還
回路を付加して成る負帰還増幅器に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a negative feedback amplifier including a negative feedback circuit in order to improve intermodulation distortion characteristics.

〔従来の技術〕[Conventional technology]

従来、この種の負帰還増幅器としては1例えば昭和59
年度電子通信学会総合全国大会論文集のム921.rX
帯負帰還電力増幅器」に示されたものがある。第4図は
従来の負帰還増幅器を示すブロック構成図である。図に
おいて、1は主増幅器、2は帯域通過フィルタ、3,4
は結合器、5は位相調整器である。上記各結合器3,4
及び位相調整器5とにより負帰還回路6が構成されてい
る。
Conventionally, as this type of negative feedback amplifier, 1, for example, the 1980
M921 of Proceedings of the Annual National Conference of the Institute of Electronics and Communication Engineers. rX
There is one shown in "Band Negative Feedback Power Amplifier". FIG. 4 is a block diagram showing a conventional negative feedback amplifier. In the figure, 1 is the main amplifier, 2 is the bandpass filter, 3, 4
is a coupler, and 5 is a phase adjuster. Each coupler 3, 4 above
A negative feedback circuit 6 is constituted by the phase adjuster 5 and the phase adjuster 5.

上記のように構成された従来の負帰還増幅器において、
主増幅器1からの歪み電力を含んだ出力電力の一部を、
負帰還回路6によ)主増幅器1の入力側く負帰還させ、
これによシ、負帰還増幅器としての歪み特性の改善を図
っている。なお、帯域通過フィルタ2は、使用周波数帯
域外での発振を防止するために用いられるものである。
In the conventional negative feedback amplifier configured as above,
A part of the output power including distortion power from the main amplifier 1 is
Negative feedback is provided to the input side of the main amplifier 1 by the negative feedback circuit 6,
This is intended to improve the distortion characteristics as a negative feedback amplifier. Note that the bandpass filter 2 is used to prevent oscillation outside the frequency band used.

〔発明が解決しようとする問題点コ 上記のような従来の負帰還増幅器では、歪み電力を負帰
還するので、歪み特性の改善を図ることは可能であるが
、信号電力も同時に負帰還されるために、利得が低下す
るという問題点があった。
[Problems to be solved by the invention] In the conventional negative feedback amplifier as described above, the distortion power is fed back negatively, so it is possible to improve the distortion characteristics, but the signal power is also fed back negatively at the same time. Therefore, there was a problem that the gain decreased.

この発明は、かかる問題点を解決するためになされたも
ので、利得を低下させることなく、歪み特性の改善を図
ることができる負帰還増幅器を得ることを目的とする。
The present invention was made to solve these problems, and an object of the present invention is to provide a negative feedback amplifier that can improve distortion characteristics without reducing gain.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る負帰還増幅器は、歪み成分を含まない入
力電力の一部と、増幅器によシ発生した歪み成分を含む
出力電力の一部とから歪み電力のみを取り出す機構を負
帰還回路に設け、取り出された歪み電力のみを前記増幅
器の入力1iIK負帰還するものである。
In the negative feedback amplifier according to the present invention, the negative feedback circuit is provided with a mechanism for extracting only the distorted power from a part of the input power that does not include distortion components and a part of the output power that includes the distortion components generated by the amplifier. , only the extracted distortion power is negatively fed back to the input 1iIK of the amplifier.

〔作用〕[Effect]

この発明の負帰還増幅器においては、取り出された歪み
電力のみを増幅器の入力側に負帰還し、信号電力は負帰
還しないために、負帰還増幅器の利得を低下させること
なく、歪み特性の改善を図ることができる。
In the negative feedback amplifier of the present invention, only the extracted distortion power is negatively fed back to the input side of the amplifier, and the signal power is not negatively fed back, so that the distortion characteristics can be improved without reducing the gain of the negative feedback amplifier. can be achieved.

〔実施例〕〔Example〕

第1図はこの発明の一実施例である負帰還増幅器を示す
ブロック構j戎図である1図において、各符号1〜5の
構成体は、上記44図に示す蛇来の負帰還回路中と同一
のものである。7は入力電力の一部を取り出す九めの結
合器、8は位相調整器。
FIG. 1 is a block diagram showing a negative feedback amplifier which is an embodiment of the present invention. In FIG. is the same as 7 is the ninth combiner that takes out a part of the input power, and 8 is the phase adjuster.

9はM幅器、10は結合器、11,12,13゜15は
端子(1)〜端子!41. 14は無反射終端器である
9 is an M-width device, 10 is a coupler, 11, 12, 13° 15 is a terminal (1) to a terminal! 41. 14 is a non-reflection terminator.

上記のように構成された負加塩増ll&I器において。In a negative salt amplification device constructed as described above.

主増幅器1への入力電力は信号電力のみでろって歪み成
分は含ま々いが、主ms器1の非縁形勅作によシ出力電
力には・+g号酸成分以外歪み成分が一般に含まれる。
The input power to the main amplifier 1 is only the signal power and does not include any distortion components, but the output power of the main ms unit 1 due to the non-linear output generally includes distortion components other than the +g acid component. It will be done.

上記結合器7にて取り出された歪み成分を含まず信号成
分のみから成る入力電力の一部は、上記位相調!168
.壇幅器9にて所望の立d 、 IIFIKされ、上記
結合器10の端子(])11に入力される。ここで、結
合器7の結合量が十分に小さければ、収り出される心力
が小さく、増幅器9をほとんど婦形禎域で動作さ・ぜる
ことかできる、この時、増幅器9から出力されて結合!
10のメ1子(1)11に人力される成力は、歪み成分
がない信号電力のみとすることができる。
A part of the input power extracted by the coupler 7 and consisting only of signal components without distortion components is the phase-adjusted! 168
.. A desired value d is set to IIFIK by the platform width device 9 and inputted to the terminal (]) 11 of the coupler 10. Here, if the coupling amount of the coupler 7 is sufficiently small, the extracted mental force is small and the amplifier 9 can be operated almost in the gynecological range.At this time, the output from the amplifier 9 is Combine!
The power manually applied to the 10th gear (1) 11 can be only signal power without distortion components.

一方、上記結合器3から取り出されて上記結合器10の
端子+2)12に入力される出力電力の一部には、信号
成分以外(歪み成分が含まれる。ここで、上記結合器1
0の端子(IDIに入力される信号の位相、振幅を上記
位相調整器8.増幅器9で所定の値にすると、結合器1
0の端子(1)11から入力された信号電力と、結合器
10の端子(2)12から入力され念信号電力とは合成
され、信号電力を結合器10の端子(3113のみに出
力することが可能である。結合器10の端子(3113
に出力された信号電力は、さらに無反射終端器14に至
る。
On the other hand, a part of the output power taken out from the coupler 3 and inputted to the terminal +2) 12 of the coupler 10 includes a distortion component other than the signal component.
When the phase and amplitude of the signal input to the terminal 0 (IDI) are set to predetermined values using the phase adjuster 8 and amplifier 9, the coupler 1
The signal power input from the terminal (1) 11 of the coupler 10 and the psychotic signal power input from the terminal (2) 12 of the coupler 10 are combined, and the signal power is output only to the terminal (3113) of the coupler 10. is possible.The terminal of the coupler 10 (3113
The signal power outputted to further reaches the non-reflection terminator 14.

しかるに、結合器10の端子(2) 12に入力された
出力電力のうちの歪み成分は、結合器10の端子(IH
Iに入力された信号成分のみから成る電力に影響されな
い。このため、歪み成力の一部は結合器10の端子(4
)15にも出力される。結合器10の端子(4)ls・
に出力された歪み成力は、位相調整器5.結合器4t−
経て主増幅器1の入力側に負帰還される。したがって、
主増幅器IK大入力れる信号電力は負帰還されず、歪み
電力のみが負帰還されることになる、この結果、負帰還
増幅器の利得を低下させることなく、歪み特性を改善す
ることができる。
However, the distortion component of the output power input to the terminal (2) 12 of the coupler 10 is
It is not affected by the power consisting only of the signal component input to I. Therefore, part of the distortion force is applied to the terminal (4) of the coupler 10.
)15 is also output. Terminal (4) ls of coupler 10
The distortion force output to the phase adjuster 5. coupler 4t-
The signal is then negatively fed back to the input side of the main amplifier 1. therefore,
The signal power input to the main amplifier IK is not negatively fed back, but only the distortion power is negatively fed back. As a result, the distortion characteristics can be improved without reducing the gain of the negative feedback amplifier.

第2図はこの発明の他の実施例である負帰還増幅器を示
すブロック構成図である。第2図に示す負帰還増幅器で
は°、結合器10の端子(2)12に入力される出力電
力の振幅を所望の値にするために減衰器16が用いられ
、また、主増幅器1の入力側に負帰還される歪み電力の
儂幅を所望の値にするために増幅器17が用いられてお
)、上記第1図に示す実施例と同様の動作を行うことが
期待できる。
FIG. 2 is a block diagram showing a negative feedback amplifier according to another embodiment of the present invention. In the negative feedback amplifier shown in FIG. The amplifier 17 is used to set the width of the distortion power that is negatively fed back to the side to a desired value), and it can be expected that the same operation as the embodiment shown in FIG. 1 described above will be performed.

第3図はこの発明の他の実施例である負帰還増幅器を示
すブロック構成図である。第3図に示す負帰還増幅器で
は、上記第1図及び第2図に示す帯域通過フィルタ2を
負帰還回路中に設けたものであり、この場合にも、上記
第1図及び第2図疋示す各実施例と同様の動作を行うこ
とが期待できる。
FIG. 3 is a block diagram showing a negative feedback amplifier according to another embodiment of the present invention. In the negative feedback amplifier shown in FIG. 3, the bandpass filter 2 shown in FIGS. 1 and 2 above is provided in the negative feedback circuit. It can be expected that the same operation as in each of the embodiments shown will be performed.

〔発明の効果〕〔Effect of the invention〕

この発明は以上説明したとおり、負帰還増幅器において
、取り出された歪み直方のみを増幅器の入力側に負帰還
し、信号゛底力は負帰還しないようにしたので、負帰還
増幅器の利得を低下させることなく、歪み時性の改善を
図ることができるという優れた効果を奏するものである
As explained above, in the present invention, in a negative feedback amplifier, only the extracted distortion rectangle is negatively fed back to the input side of the amplifier, and the signal bottom power is not negatively fed back, so that the gain of the negative feedback amplifier can be reduced. However, it has the excellent effect of improving distortion resistance.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施列である負帰還増幅器を示す
ブロック構成図、第2図及び第3図は、それぞれこの発
明の他の実施列である負帰還増幅器を示すブロック構成
図、第4図は従来の負帰還増幅器を示すブロック構成図
である。 図において、1・・・主増幅器、2・・・帯域通過フィ
ルタ、3,4,7.10・・・結合器、5.8・・・位
相調整器、6・・・負帰還回路、9,17・・・増幅器
、11・・・端子(1)、12・・・端子(2)、13
・・・端子(3)、14・・・無反射終端器、15・・
・端子(4)、16・・・減衰器である。 なお、各図中、同一符号は同一、又は相当部分を示す。
FIG. 1 is a block diagram showing a negative feedback amplifier which is one embodiment of the present invention, and FIGS. 2 and 3 are block diagrams showing a negative feedback amplifier which is another embodiment of the invention, respectively. FIG. 4 is a block diagram showing a conventional negative feedback amplifier. In the figure, 1... Main amplifier, 2... Bandpass filter, 3, 4, 7. 10... Combiner, 5.8... Phase adjuster, 6... Negative feedback circuit, 9 , 17...Amplifier, 11...Terminal (1), 12...Terminal (2), 13
...terminal (3), 14...non-reflection terminator, 15...
・Terminals (4), 16... Attenuators. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】[Claims] 負帰還増幅器において、増幅器の入力電力の一部を取り
出す機構と、前記増幅器の歪み電力を含む出力電力の一
部を取り出す機構と、前記取り出された入力電力の一部
又は出力電力の一部の一方もしくは両方の振幅及び位相
を所定の値にするための機構と、前記取り出された各入
力電力及び出力電力を合成することにより歪み電力のみ
を取り出す機構と、この取り出された歪み電力を前記増
幅器の入力側に負帰還させる機構とを備えたことを特徴
とする負帰還増幅器。
In a negative feedback amplifier, a mechanism for extracting a part of the input power of the amplifier, a mechanism for extracting a part of the output power including the distortion power of the amplifier, and a part of the extracted input power or a part of the output power. a mechanism for setting one or both of the amplitudes and phases to predetermined values; a mechanism for extracting only distortion power by combining the extracted input powers and output powers; and a mechanism for extracting only distortion power by combining the extracted input powers and output powers; A negative feedback amplifier comprising: a mechanism for providing negative feedback to the input side of the amplifier.
JP25690984A 1984-12-05 1984-12-05 Negative feedback amplifier Pending JPS61134106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25690984A JPS61134106A (en) 1984-12-05 1984-12-05 Negative feedback amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25690984A JPS61134106A (en) 1984-12-05 1984-12-05 Negative feedback amplifier

Publications (1)

Publication Number Publication Date
JPS61134106A true JPS61134106A (en) 1986-06-21

Family

ID=17299067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25690984A Pending JPS61134106A (en) 1984-12-05 1984-12-05 Negative feedback amplifier

Country Status (1)

Country Link
JP (1) JPS61134106A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100458998B1 (en) * 1995-12-29 2005-02-28 퀄컴 인코포레이티드 Out-of-band compensation for non-linear device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4888849A (en) * 1972-02-22 1973-11-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4888849A (en) * 1972-02-22 1973-11-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100458998B1 (en) * 1995-12-29 2005-02-28 퀄컴 인코포레이티드 Out-of-band compensation for non-linear device

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