JPS609365B2 - Negative impedance repeater with equalization function - Google Patents
Negative impedance repeater with equalization functionInfo
- Publication number
- JPS609365B2 JPS609365B2 JP51152716A JP15271676A JPS609365B2 JP S609365 B2 JPS609365 B2 JP S609365B2 JP 51152716 A JP51152716 A JP 51152716A JP 15271676 A JP15271676 A JP 15271676A JP S609365 B2 JPS609365 B2 JP S609365B2
- Authority
- JP
- Japan
- Prior art keywords
- impedance
- repeater
- negative impedance
- negative
- impedance circuit
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/62—Two-way amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Networks Using Active Elements (AREA)
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Description
【発明の詳細な説明】
本発明は等化機能を有する負性インピーダンス中継器に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a negative impedance repeater having an equalization function.
広帯域信号を伝送する場合、高域の信号ほど減衰が大き
いので〈中継器で高域を強調することにより伝送信号の
等化を行なうことが要求される。When transmitting a wideband signal, the higher the frequency of the signal, the greater the attenuation, so it is necessary to equalize the transmitted signal by emphasizing the high frequency range with a repeater.
従来は2線−4線変換方式により中継器を構成し、LC
素子によって構成された等化器や、RC素子を用いたト
ランジスタのェミツタ・ピーキング回路のカスケード接
続により等化を行なっていた。しかし、中継器は2線−
4線変換方式よりも2線式の負・性インピーダンス中継
器のほうが利点が多いo2線式の負I性インピーダンス
中継器であって等イq鰹能を有するものの従来例として
は、差動形演算増幅器からなる貸性インピーダンス変換
器を用し、てそれに接続されるインピーダンスを負・性
化するとともに、そのインピーダンス素子に高城増加特
性を持たせるようにしたものがある。Conventionally, repeaters were constructed using a 2-wire to 4-wire conversion method, and LC
Equalization was performed using an equalizer made up of elements and a cascade connection of emitter peaking circuits of transistors using RC elements. However, the repeater has 2 wires -
2-wire negative impedance repeaters have more advantages than 4-wire conversion systems. Conventional examples of 2-wire negative I impedance repeaters that have equal-equal function are differential type. There is a method that uses a fixed impedance converter consisting of an operational amplifier, makes the impedance connected to it negative and positive, and gives the impedance element a Takagi increasing characteristic.
この場合、インピーダンス素子は、高域増加特性を持た
せるために、ィンダクタンス素子を含んだものとしなけ
ればならないが、インダクタンス素子においては周波数
特性の調整が厄介であり、また2次以上の高次の周波数
特性を持たせることは容易ではない。本発明の目的は、
RC素子によって1次はもちろん高次の等化繊能を容易
に実現できる負‘性インピーダンス中継器を提供するこ
とにある。In this case, the impedance element must include an inductance element in order to have high-frequency increasing characteristics, but it is difficult to adjust the frequency characteristics of the inductance element, and it is difficult to adjust the frequency characteristics of the inductance element. It is not easy to provide such frequency characteristics. The purpose of the present invention is to
It is an object of the present invention to provide a negative impedance repeater that can easily realize not only first-order but also high-order equalization performance using RC elements.
本発明の中継器は、ハイブリッド・トランスの直列肢と
並列肢にそれぞれ賃性インピーダンス回路を結合してな
る貸性インピーダンス中継器において、それぞれの負性
インピーダンス回路の増幅器の増幅定数についてある条
件を規定したところに特徴がある。In the repeater of the present invention, certain conditions are specified for the amplification constant of the amplifier of each negative impedance circuit in the non-impedance repeater which is formed by coupling sub-impedance circuits to the series limb and the parallel limb of a hybrid transformer. There is a characteristic in that.
以下図面によって本発明を説明する。The present invention will be explained below with reference to the drawings.
第1図は負性インピーダンス中継器の基本的構成図であ
る。第1図において、T日はハイブリッド・トランスで
、Tsはその直列肢のトランス(直列トランス)、TP
は並列肢のトランス(並列トランス)である。直列トラ
ンスTsの巻線比は1十1:21、並列トランスTPの
巻線比は1十nPである。一Zsは直列肢の負性インピ
ーダンス回路(直列インピーダンス回路)、一ZFは並
列肢の負性ィンピ−ダンス回路(並列インピーダンス回
路)で、これらインピーダンス回路一Zs,一ZPはそ
れぞれ直列トランスTsおよび並列トランスTPの2次
側に接続される。直列インピーダンス回路一Zsは、高
入力インピーダンスでゲインが1十As(As>0)の
増幅器AMPsの入出力端子を抵抗Rsで接続してなる
。並列インピーダンス回路−ZPの構成も同様になって
いる。負‘性インピーダンス回路を一般的に第2図のよ
うに表わし、この回路の増幅器AMPの入出力に着目す
れば次式の関係が成立つ。FIG. 1 is a basic configuration diagram of a negative impedance repeater. In Figure 1, T is a hybrid transformer, Ts is its series leg transformer (series transformer), and TP
is a parallel limb transformer (parallel transformer). The winding ratio of the series transformer Ts is 11:21, and the winding ratio of the parallel transformer TP is 10 nP. 1Zs is a negative impedance circuit of the series limb (series impedance circuit), 1ZF is a negative impedance circuit of the parallel limb (parallel impedance circuit), and these impedance circuits 1Zs and 1ZP are the series transformer Ts and the parallel Connected to the secondary side of transformer TP. The series impedance circuit 1Zs is formed by connecting the input and output terminals of an amplifier AMPs with a high input impedance and a gain of 10 As (As>0) through a resistor Rs. The configuration of the parallel impedance circuit-ZP is also similar. A negative impedance circuit is generally represented as shown in FIG. 2, and if attention is paid to the input and output of the amplifier AMP of this circuit, the following relationship holds true.
v。v.
Urコ(1十A)V,N ‘1}1…i(
V…−V側T〉毒 (2)^Z…≦¥・;:−墓
(3)
この結果を第1図の直列インピーダンス回路一Zsと並
列インピーダンス回路−ZPにあてはめれば、ZS=を
(4)
ZP=を (5)
が得られる。Urko(10A)V,N'1}1...i(
V...-V side T〉Poison (2) ^Z...≦¥・;:-grave (3) Applying this result to the series impedance circuit -Zs and the parallel impedance circuit -ZP in Figure 1, we get ZS=
(4) ZP= (5) is obtained.
このとき中継器の影像インピーダンスは Z。At this time, the image impedance of the repeater is Z.
=時予=;」器■で与えられ、これが伝送線路の特性イ
ンピーダンスRoに整合するものとすれば、中継器のゲ
インは次式で与えられる。=Time =;'' If it is assumed that this matches the characteristic impedance Ro of the transmission line, then the gain of the repeater is given by the following equation.
■,{7ー式から、As,Apを一定に保ちながらAs
に高域減衰特性を持たせると、整合条件を維持したまま
中継器のゲインKに高域強調特性すなわち等化機能を持
たせられることがわかる。■, {From formula 7, As and Ap are kept constant, As
It can be seen that by giving a high-frequency attenuation characteristic to the repeater gain K, the repeater gain K can be given a high-frequency emphasis characteristic, that is, an equalization function, while maintaining the matching condition.
このような貸性インピーダンス回路は例えば演算増幅器
を用いて構成された第3図a,bのように回路によって
実現できる。Such an impedance circuit can be realized, for example, by a circuit as shown in FIGS. 3a and 3b, which is constructed using an operational amplifier.
第3図について、aは直列インピーダンス回路、bは並
列インピーダンス回路である。これらの回路の入力イン
ピーダンスはそれぞれで表わされるから、As,APは
それぞれとなるから「
RS2‘CS:RP3′CP(12)
RS2′/RS2 =RP3′/RP3 (13
)となるようにすすれば、As・AP=一定の条件を満
足しながら、Asに高城減衰特性を持たせることができ
る。In FIG. 3, a is a series impedance circuit and b is a parallel impedance circuit. Since the input impedance of these circuits is expressed by each, As and AP are respectively expressed as follows: RS2'CS: RP3'CP (12) RS2'/RS2 = RP3'/RP3 (13
), it is possible to give As a Takagi damping characteristic while satisfying the constant condition of As·AP=.
すなわち整合を維持したまま中継器のゲインKに高城強
調特性を持たせることができる。(2)式において、R
P,とその次の分子の項とは入替えてもZPの値は変わ
らないから、並列インピーダンス回路は第4図のように
構成してもよい。以上は1次の等化機能を実現した例で
あるが、2次の等化繊能を実現するには直列インピーダ
ンス回路および並列インピーダンス回路をそれぞれ第5
図a,bのようにすればよい。このように、本発明は、
負性インピーダンス回路用のゲインが1十Aの増幅器に
おいて増幅定数Aを、直列肢の負‘性インピーダンス回
路については、高城減衰特性を持つものとしたので、ィ
ンダクタンス素子を用いることなく、RC素子のみで1
次はもちろん高次の等化機能が容易に実現できる負性イ
ンピーダンス中継器が得られる。That is, it is possible to give the gain K of the repeater a Takagi emphasis characteristic while maintaining matching. In formula (2), R
Since the value of ZP does not change even if P and the next numerator term are interchanged, the parallel impedance circuit may be constructed as shown in FIG. The above is an example of realizing a first-order equalization function, but to realize a second-order equalization function, a series impedance circuit and a parallel impedance circuit are required.
It can be done as shown in Figures a and b. Thus, the present invention
In an amplifier with a gain of 10 A for a negative impedance circuit, the amplification constant A is set to have a Takagi attenuation characteristic for the negative impedance circuit in the series limb, so an RC element can be used without using an inductance element. Only 1
Next, of course, a negative impedance repeater is obtained in which a high-order equalization function can be easily realized.
第1図は負性インピーダンス中継器の原理的構成図、第
2図は貸性インピーダンス回路の原理的構成図、第3図
〜第5図は本発明の中継器における負I性インピーダン
ス回路の実施例である。
TH……ハイブリッド・トランス、Ts・・・・・・直
列トランス、TP・・・・・・並列トランス、一Zs,
一ZP・…・・員性インピーダンス回路、AMP…・・
・増幅器、R・・…・抵抗。第1図
第2図
第3図
第4図
第5図Fig. 1 is a basic configuration diagram of a negative impedance repeater, Fig. 2 is a basic configuration diagram of a sub-impedance circuit, and Figs. 3 to 5 are implementations of a negative I impedance circuit in a repeater of the present invention. This is an example. TH...Hybrid transformer, Ts...Series transformer, TP...Parallel transformer, -Zs,
- ZP...Member impedance circuit, AMP...
・Amplifier, R...Resistance. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5
Claims (1)
にそれぞれ負性インピーダンス回路を接続してなる中継
器において、両負性インピーダンス回路をそれぞれゲイ
ンが1+Aの増幅器と、この増幅器の入出力端子間を接
続する帰還インピーダンスとで構成し、両負性インピー
ダンス回路における前記帰還インピーダンスの値と前記
増幅器のゲイン定数Aとの比同志の積を一定に保ったま
ま直列肢側の負性インピーダンス回路の増幅器のゲイン
定数Aに高域減衰特性を持たせたことを特徴とする負性
インピーダンス中継器。1 In a repeater in which negative impedance circuits are connected to the secondary sides of the series and parallel limbs of a hybrid transformer, both negative impedance circuits are connected between an amplifier with a gain of 1+A and the input and output terminals of this amplifier. and a feedback impedance connecting the negative impedance circuit of the negative impedance circuit on the series side while keeping the ratio of the value of the feedback impedance in the double negative impedance circuit and the gain constant A of the amplifier constant. A negative impedance repeater characterized in that the gain constant A of has high-frequency attenuation characteristics.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51152716A JPS609365B2 (en) | 1976-12-17 | 1976-12-17 | Negative impedance repeater with equalization function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51152716A JPS609365B2 (en) | 1976-12-17 | 1976-12-17 | Negative impedance repeater with equalization function |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5376609A JPS5376609A (en) | 1978-07-07 |
JPS609365B2 true JPS609365B2 (en) | 1985-03-09 |
Family
ID=15546583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51152716A Expired JPS609365B2 (en) | 1976-12-17 | 1976-12-17 | Negative impedance repeater with equalization function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS609365B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008512022A (en) * | 2004-08-31 | 2008-04-17 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Active electromagnetic interference filter circuit to suppress line conduction interference signals |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5144410A (en) * | 1974-10-14 | 1976-04-16 | Takeo Fukunaga | RYOHOKOZOFUKUKI |
-
1976
- 1976-12-17 JP JP51152716A patent/JPS609365B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5144410A (en) * | 1974-10-14 | 1976-04-16 | Takeo Fukunaga | RYOHOKOZOFUKUKI |
Also Published As
Publication number | Publication date |
---|---|
JPS5376609A (en) | 1978-07-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0127614B2 (en) | ||
JP3109461B2 (en) | Low-pass filter | |
US4370624A (en) | Low noise amplifier circuit with reduced low-frequency gain | |
JPS609365B2 (en) | Negative impedance repeater with equalization function | |
JPS5834046B2 (en) | Bridging T-type variable equalizer | |
US5805031A (en) | Transistor ratio controlled CMOS transmission line equalizer | |
CA1106005A (en) | Negative impedance converters | |
US4151493A (en) | Negative impedance converters | |
US6931122B2 (en) | Single transformer hybrid system and method | |
JP3145503B2 (en) | Waveform distortion correction circuit | |
JPS60117908A (en) | Attenuation distortion compensating delay equalizer | |
JPS6214734Y2 (en) | ||
JPS6053482B2 (en) | variable equalizer | |
US20030090315A1 (en) | All pass filter | |
JPS6347062Y2 (en) | ||
Shida et al. | Variable equalizer with differential amplifiers | |
JPS6145885B2 (en) | ||
JPS5931052Y2 (en) | band pass filter | |
JPS6173411A (en) | Active filter circuit | |
JPS6139774B2 (en) | ||
JPS60190033A (en) | Pre-emphasis circuit | |
JPS646586Y2 (en) | ||
JPS6019682B2 (en) | variable all-pass circuit | |
JPS60180224A (en) | Device for correcting primary and secondary amplitude distortions of spectra of digital signal | |
JPS6059766B2 (en) | Bridging T-type delay equalizer |