JPS613510A - Two-way amplifier - Google Patents
Two-way amplifierInfo
- Publication number
- JPS613510A JPS613510A JP12436284A JP12436284A JPS613510A JP S613510 A JPS613510 A JP S613510A JP 12436284 A JP12436284 A JP 12436284A JP 12436284 A JP12436284 A JP 12436284A JP S613510 A JPS613510 A JP S613510A
- Authority
- JP
- Japan
- Prior art keywords
- terminals
- input
- amplifier
- section
- frequency band
- 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
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)
- Amplifiers (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は双方向増幅装置に係るものである。[Detailed description of the invention] (Industrial application field) The present invention relates to a bidirectional amplifier.
（従来技術）
従来一方から他方向のみでなく、他方から一方向にも増
幅可能な回路の１つとして２線４線式双方向増幅装置が
公知である。(Prior Art) A two-wire and four-wire bidirectional amplifier is known as one of the circuits capable of amplifying not only from one direction to the other but also from the other direction in one direction.
（発明が解決しようとする問題点） この増幅装置により入力信号を増幅すると。(Problem that the invention attempts to solve) When the input signal is amplified by this amplifier.
増幅装置に誤発振現象が起ることがある。これは、増幅
作用により入力信号の高周波数帯が限界以上に増幅され
ると起るもので、このため、増幅装置の増幅幅は、通常
一定以下に抑えられている。Erroneous oscillation may occur in the amplifier. This occurs when the high frequency band of the input signal is amplified beyond the limit due to the amplification effect, and for this reason, the amplification width of the amplification device is usually kept below a certain level.
（問題を解決するための手段）
よって、本発明は入出力部ｌを接続する端子１ａ＊ｌｂ
と、増幅部７の入力側を接続する端子１ｃ・ｌｄと、増
幅部８の出力側を接続する端子１ｅΦ１ｆおよび等価回
路５を接続する端子１ｇ・１ｈと５を有するハイブリッ
トトランス３と、入出力部２を接続する端子２ａ・２ｂ
と、増幅部８の入力側を接続する端子２ｃ・２ｄと、増
幅部７の出力側を接続する端子２８拳２ｆおよび等価回
路６を接婢する端子２ｇ・２ｈとを有するハイブリット
トランス４とを有し、前記トランス３の端子１ａ・１ｂ
に入出力部１を、前記端子１ｇ１１１ｈに等価回路５を
、前記端子１ｃ・１ｄに増幅部７の入力側を、前記トラ
ンス４の端子２ａ・２ｂに入出力部２を、前記端子２ｇ
・２ｈに等価回路６を、前記端子２ｃ・２ｄに増幅部８
の入力側をそれぞれ接続し、前記増幅部７の出力側を端
子２ｅ−２ｆに前記増幅部８の出力側を端子１ｅ・１ｆ
にそれぞれ接続したものにおいて前記増幅部７．８には
入力信号のうち所望の低周波数帯をカットして高周波数
帯を通過させるハイパスフィルター９と、該フィルター
９を通過した信号を増幅する増幅器１１と、該増幅器に
より増幅された信号のうち、所望の高周波数帯をカット
して低周波数帯を通過させるローパスフィルター１２と
を設けた双方向増幅装置の構成としたものである。(Means for solving the problem) Therefore, the present invention provides terminals 1a*lb for connecting input/output section l.
, a hybrid transformer 3 having terminals 1c and ld that connect the input side of the amplifying section 7, a terminal 1eΦ1f that connects the output side of the amplifying section 8, and terminals 1g, 1h and 5 that connect the equivalent circuit 5, and an input/output Terminals 2a and 2b connecting part 2
and a hybrid transformer 4 having terminals 2c and 2d that connect the input side of the amplification section 8, a terminal 2f that connects the output side of the amplification section 7, and terminals 2g and 2h that connect the equivalent circuit 6. Terminals 1a and 1b of the transformer 3
The input/output unit 1 is connected to the terminal 1g111h, the input side of the amplification unit 7 is connected to the terminals 1c and 1d, the input/output unit 2 is connected to the terminal 2a and 2b of the transformer 4, and the input/output unit 2 is connected to the terminal 2g.
・An equivalent circuit 6 is connected to 2h, and an amplification section 8 is connected to the terminals 2c and 2d.
The input sides of the amplifying section 7 are connected to the terminals 2e-2f, and the output side of the amplifying section 8 is connected to the terminals 1e and 1f.
The amplifying section 7.8 includes a high-pass filter 9 that cuts a desired low frequency band of the input signal and passes a high frequency band, and an amplifier 11 that amplifies the signal that has passed through the filter 9. This is a bidirectional amplification device comprising: and a low-pass filter 12 that cuts a desired high frequency band and passes a low frequency band of the signal amplified by the amplifier.
本発明の一実施例を図面により説明すると、ｌはハイブ
リットトランス３の入出力部で、１ａφｌｂは入出力部
１の入出力端子であり、前記トランス３は増幅部７を接
続する出力端子１ｃ・ｌｄと、等価回路５を接続する端
子１ｇ−１ｈと、後述する増幅部８を接続する入力端子
１ｅｅｌＦとを有する。An embodiment of the present invention will be described with reference to the drawings. l is an input/output section of a hybrid transformer 3, 1aφlb is an input/output terminal of the input/output section 1, and the transformer 3 has output terminals 1c and 1c to which an amplifier section 7 is connected. ld, terminals 1g-1h to which the equivalent circuit 5 is connected, and an input terminal 1eelF to which an amplification section 8, which will be described later, is connected.
２はハイブリットトランス４の入出力部で、２ａ・２ｂ
は入出力部２の入出力端子であり、前記トランス４は増
幅部８を接続する出力端子２ｃ・２ｄと、等価回路６を
接続する端子２ｇ・２ｈと、前記増幅部７を接続する入
力端子２ｅ・２ｆとを有する。2 is the input/output section of the hybrid transformer 4, 2a and 2b
are input/output terminals of the input/output section 2, and the transformer 4 has output terminals 2c and 2d to which the amplification section 8 is connected, terminals 2g and 2h to which the equivalent circuit 6 is connected, and an input terminal to which the amplification section 7 is connected. 2e and 2f.
前記等価回路５と等価回路６は前記入出力部ｌと入出力
部２にそれぞれ接続される電話回線のインピーダンスと
等しいインピーダンスに調節しうるように可変に構成し
たものであり、コンデンサーＣＩとコンデンサーｃ２と
固定拭抗Ｒ１および可変抵抗ＶＲから構成し、前記可変
抵抗ＶＲにより交流抵抗値を可変しうるように形成する
。The equivalent circuit 5 and the equivalent circuit 6 are configured to be variable so that the impedance can be adjusted to be equal to the impedance of the telephone line connected to the input/output section 1 and the input/output section 2, respectively, and the capacitor CI and the capacitor c2 , a fixed wiping force R1, and a variable resistor VR, and is formed so that the alternating current resistance value can be varied by the variable resistor VR.
しかして１等価回路５をハイブリットトランス３の端子
１ｇ−１ｂに接続し、同様に等価回路６をハイブリット
トランス４の端子２ｇ・２ｂに接続する。Thus, one equivalent circuit 5 is connected to terminals 1g and 1b of hybrid transformer 3, and equivalent circuit 6 is similarly connected to terminals 2g and 2b of hybrid transformer 4.
しかして、増幅部７の入力側をハイブリットトランス３
の出力端子１ｃ＠ｌｄに接続し、増幅部７の出力側はハ
イブリットトランス４の入力端子２ｅ・２ｆに接続し、
増幅部８の入力側をハイブリットトランス４の出力端子
２ｃ・２ｄに接続し、増幅部８の出力側はハイブリット
トランス３の入力端子１ｅ・１ｆに接続する。Therefore, the input side of the amplifier section 7 is connected to the hybrid transformer 3.
The output side of the amplifier section 7 is connected to the input terminals 2e and 2f of the hybrid transformer 4,
The input side of the amplifier section 8 is connected to the output terminals 2c and 2d of the hybrid transformer 4, and the output side of the amplifier section 8 is connected to the input terminals 1e and 1f of the hybrid transformer 3.
しかして、同一構成の前記増幅部７．８の回路を第２図
に示す。FIG. 2 shows a circuit of the amplifying section 7.8 having the same configuration.
９は入力信号のうち低周波数帯をカットして高周波数帯
を通過させるハイパスフィルターで、増幅部７．８の入
力側に設けられる。１０は増幅器１１の入力電圧を決定
する電圧調整部、１２は前記増幅器１１により増幅した
信号のうち高周波数帯をカットして低周波数帯を通過さ
せるローパスフィルターである。該フィルター１２によ
る周波数のカットは、使用する目的に応じて異るが、本
実施例では人間の音声の周波数をカバーしうるように設
定する。１３は前記増幅器１１により増幅した信号が過
大になると増幅器１１への入力信号を減少させる自動利
得制御装置、１４はアナログスイッチ１５をオン・オフ
させる入力端子で、増幅装置を取付ける本体の電源側等
に取付ける。A high-pass filter 9 cuts the low frequency band of the input signal and passes the high frequency band, and is provided on the input side of the amplification section 7.8. Reference numeral 10 denotes a voltage adjustment unit that determines the input voltage of the amplifier 11, and reference numeral 12 denotes a low-pass filter that cuts the high frequency band of the signal amplified by the amplifier 11 and passes the low frequency band. The frequency cut by the filter 12 varies depending on the purpose of use, but in this embodiment, it is set so as to cover the frequency of human voice. 13 is an automatic gain control device that reduces the input signal to the amplifier 11 when the signal amplified by the amplifier 11 becomes excessive; 14 is an input terminal that turns on/off the analog switch 15, which is connected to the power supply side of the main body to which the amplifier device is attached, etc. Attach to.
（作用） 次に作用を述る。(effect) Next, the action will be described.
本発明は上述の構成であるため、入出力部ｌ、２にそれ
ぞれ所望の回路例えば電話転送装置を接続して信号を流
す、入出力部ｌから入力した信号は端子１ａ＊１ｂから
ハイブリットトランス３に入り、該トランス３により端
子ｌＣ・１ｄ側に振り分けられて、増幅１ｉｉ７に伝り
該増幅部７で増幅されて、端子２ｅ・２ｆからトランス
４に伝り、該トランス４で端子２ａ＊２ｂ方向に分離さ
れて入出力部２より出力される。また、同様に入出力部
２から入力した信号は端子２ａ・２ｂからへイブリット
トランス４に入り、該トランス４により端子２ｃ拳２ｄ
側に振り分けられて、増幅部８に伝り該増幅部８で増幅
されて、端子１ｅ・１ｆからトランス３に伝り、該トラ
ンス３で端子１ａ・１ｂ方向に分離されて入出力部ｌよ
り出力される。Since the present invention has the above-described configuration, a desired circuit such as a telephone transfer device is connected to each of the input/output sections 1 and 2, and a signal is sent.The signal inputted from the input/output section 1 is sent from the terminal 1a*1b to the hybrid transformer 3. is distributed to the terminals 1C and 1d by the transformer 3, transmitted to the amplifier 1ii7, amplified by the amplifier 7, transmitted from the terminals 2e and 2f to the transformer 4, and the transformer 4 outputs the terminals 2a*2b. The signals are separated in different directions and outputted from the input/output section 2. Similarly, signals input from the input/output section 2 enter the hybrid transformer 4 from the terminals 2a and 2b, and the transformer 4 inputs the signals to the terminals 2c and 2d.
It is distributed to the side, transmitted to the amplifier section 8, amplified by the amplifier section 8, transmitted from the terminals 1e and 1f to the transformer 3, separated in the direction of the terminals 1a and 1b by the transformer 3, and from the input/output section l. Output.
しかして、初期設定値の等価回路５．６が入出力部ｌ、
２にそれぞれ接続した回路に対しインピーダンスの等価
が取れていないと、ハイブリットトランス３．４におけ
る入出力信号の分離作用が低下する。即ち、入出力部ｌ
からの信号は前述のように、トランス３→端子１ｃ・ｌ
ｄ→増幅部７→端子２ｅφ２ｆ→トランス４と伝るが、
トランス４内で端子２ａ・２ｂ側に完全に分離されず、
端子２ｃ・２ｄより増幅部８に漏話してしまう、すると
、この信号は増幅部８で増幅されて。Therefore, the equivalent circuit 5.6 with the initial setting value is the input/output section l,
If the impedances of the circuits connected to the two terminals are not equal, the input/output signal separation effect in the hybrid transformer 3.4 will deteriorate. That is, the input/output section l
As mentioned above, the signal from the transformer 3 → terminal 1c/l
It is transmitted as d→amplifier 7→terminal 2eφ2f→transformer 4,
The terminals 2a and 2b are not completely separated in the transformer 4,
Crosstalk occurs from the terminals 2c and 2d to the amplifying section 8. Then, this signal is amplified by the amplifying section 8.
端子１ｅ・１ｆからトランス３に伝り、該トランス３内
においても、端子１ａ・１ｂ側に分離しきれずに、端子
ｔｃ・１ｄ側に漏話し、再び前記増幅部７により増幅さ
れてしまう、所謂、増幅装置７．８の帰還ループが成立
し、ハウリングが起る。The so-called crosstalk is transmitted from the terminals 1e and 1f to the transformer 3, and within the transformer 3, it is not completely separated into the terminals 1a and 1b, but is transmitted to the terminals tc and 1d, and is amplified again by the amplifying section 7. , a feedback loop of the amplifier device 7.8 is established, and howling occurs.
しかして、この状態をこなると、等価回路５．６のイン
ピーダンスが適切でないと判断できるため１等価回路５
．６のそれぞれの可変抵抗ＶＲを調節して、交流抵抗値
を順次変化させて、入力インピータンスとの等価を取る
。しかして、等何回路５．６によりインピーダンスの等
価が取れると、ハイブリットトランス３．４の分離性能
が上昇して略完全に分離できるため、漏話現象は解除で
き、ハウリングはなくなり、インピーダンスの等価が取
れる。However, if this condition is exceeded, it can be determined that the impedance of the equivalent circuit 5.6 is not appropriate, so the 1 equivalent circuit 5.
．． The AC resistance value is sequentially changed by adjusting each of the variable resistors VR of 6, and is made equivalent to the input impedance. However, when the impedance is equalized by the equal number circuit 5.6, the separation performance of the hybrid transformer 3.4 increases and almost complete separation is achieved, so the crosstalk phenomenon can be canceled, howling disappears, and the impedance is equalized. I can take it.
しかして、等何回路５．６によりインピーダンスの等価
が取れ、増幅器１１により信号を大幅に増幅するした場
合、トランス３．４により増幅部７に入力される信号は
ハイパスフィルター９により低周波数帯がカットされて
増幅器１１に入力され、増幅器１１は電圧調整部１０に
より最適な入力電圧に調節されて、前記入力信号を増幅
し、口、−パスフィルター１２に入り、高周波数帯がカ
ットされてトランス４．３に入いるため、前記増幅器１
１の誤発振現象の原因となる高周波数帯がカットされる
ため、増幅器１１による大幅な増幅が期待できる。Therefore, when the impedance is equalized by the equal circuit 5.6 and the signal is greatly amplified by the amplifier 11, the signal input to the amplification section 7 by the transformer 3.4 is filtered in the low frequency band by the high-pass filter 9. The input signal is cut and input to the amplifier 11, and the amplifier 11 is adjusted to an optimal input voltage by the voltage regulator 10, amplifies the input signal, and then enters the -pass filter 12, where the high frequency band is cut and the transformer is input. 4.3, the amplifier 1
Since the high frequency band that causes the erroneous oscillation phenomenon of 1 is cut, significant amplification by the amplifier 11 can be expected.
しかして、従来公知の増幅器ではローパスフィルター１
２を設けていないため、所望だけの増幅を与えてやると
、高周波数帯が必要以上に増幅されて増幅部７の誤発振
現象が起きてしまい、所望の増幅度を期待できなかった
。However, in conventionally known amplifiers, the low-pass filter 1
2 is not provided, and when a desired amount of amplification is applied, the high frequency band is amplified more than necessary, causing an erroneous oscillation phenomenon in the amplifying section 7, making it impossible to expect the desired degree of amplification.
しかしながら、本発明では、ローパスフィルター１２に
より、前述の如く不要周波数帯をカットして、増幅器１
１の誤発振現象の原因となる信号を除去してるため、増
幅器１１により所望の増幅を得ることができ。However, in the present invention, the unnecessary frequency band is cut by the low-pass filter 12 as described above, and the amplifier 1
Since the signal that causes the erroneous oscillation phenomenon of 1 is removed, the desired amplification can be obtained by the amplifier 11.
第１図は全体の回路図、第２図は要部の回路図である。
符号の説明
１．２・・・入出力部、３．４・・・トランス、５．６
・・・等何回路、７，８・・・増幅部、９・・・ハイパ
スフィルター、１０・・・電圧調整部、１１・・・増幅
器、１２・・・ローパスフィルター、１３・・・自動利
得制御、１４・・・入力端子、１５・・・アナログスイ
ッチ、１ａ＊ ｌｂ、 Ｉｃｅ ｌｄ、 ｌｅｅ ｉｆ
、 １ｇ＊ ｌｈ、２ａ＠２ｂ、２ｃｍ２ｄ、２ｅｅ２
ｆ、２． 拳２ｈ−・・端子、Ｃ１，Ｃ２・−コンデン
サー、Ｒ１・・・固定抵抗、ＶＲ・・・可変抵抗。
外１名FIG. 1 is an overall circuit diagram, and FIG. 2 is a circuit diagram of main parts. Explanation of symbols 1.2...Input/output section, 3.4...Transformer, 5.6
...etc. circuits, 7, 8...amplifier section, 9...high pass filter, 10...voltage adjustment section, 11...amplifier, 12...low pass filter, 13...automatic gain Control, 14... Input terminal, 15... Analog switch, 1a* lb, Ice ld, lee if
, 1g*lh, 2a@2b, 2cm2d, 2ee2
f, 2. Fist 2h - terminal, C1, C2 - capacitor, R1 - fixed resistance, VR - variable resistance. 1 other person
Claims (1)
力側を接続する端子１ｃ・１ｄと、増幅部８の出力側を
接続する端子１ｅ・１ｆおよび等価回路５を接続する端
子１ｇ・１ｈとを有するハイブリットトランス３と、入
出力部２を接続する端子２ａ・２ｂと、増幅部８の入力
側を接続する端子２ｃ・２ｄと、増幅部７の出力側を接
続する端子２ｅ・２ｆおよび等価回路６を接続する端子
２ｇ・２ｈとを有するハイブリットトランス４とを有し
、前記トランス３の端子１ａ・１ｂに入出力部１を、前
記端子１ｇ・１ｈに等価回路５を、前記端子１ｃ・１ｄ
に増幅部７の入力側を、前記トランス４の端子２ａ・２
ｂに入出力部２を、前記端子２ｇ・２ｈに等価回路６を
、前記端子２ｃ・２ｄに増幅部８の入力側をそれぞれ接
続し、前記増幅部７の出力側を端子２ｅ・２ｆに前記増
幅部８の出力側を端子１ｅ・１ｆにそれぞれ接続したも
のにおいて、前記増幅部７、８には入力信号のうち所望
の低周波数帯をカットして高周波数帯を通過させるハイ
パスフィルター９と、該フィルター９を通過した信号を
増幅する増幅器１１と、該増幅器により増幅された信号
のうち、所望の高周波数帯をカットして低周波数帯を通
過させるローパスフィルター１２とを設けた双方向増幅
装置。Terminals 1a and 1b that connect the input/output section 1, terminals 1c and 1d that connect the input side of the amplification section 7, terminals 1e and 1f that connect the output side of the amplification section 8, and a terminal 1g that connects the equivalent circuit 5. 1h, terminals 2a and 2b that connect the input/output section 2, terminals 2c and 2d that connect the input side of the amplification section 8, and terminals 2e and 2e that connect the output side of the amplification section 7. 2f and terminals 2g and 2h for connecting an equivalent circuit 6, the input/output section 1 is connected to terminals 1a and 1b of the transformer 3, the equivalent circuit 5 is connected to the terminals 1g and 1h, and the Terminal 1c/1d
The input side of the amplifier section 7 is connected to the terminals 2a and 2 of the transformer 4.
The input/output section 2 is connected to the terminals 2g and 2h, the input side of the amplification section 8 is connected to the terminals 2c and 2d, and the output side of the amplification section 7 is connected to the terminals 2e and 2f. The output side of the amplification section 8 is connected to the terminals 1e and 1f, respectively, and the amplification sections 7 and 8 are provided with a high-pass filter 9 that cuts a desired low frequency band of the input signal and passes a high frequency band; A bidirectional amplification device that includes an amplifier 11 that amplifies the signal that has passed through the filter 9, and a low-pass filter 12 that cuts a desired high frequency band and passes a low frequency band among the signals amplified by the amplifier. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12436284A JPS613510A (en) | 1984-06-16 | 1984-06-16 | Two-way amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12436284A JPS613510A (en) | 1984-06-16 | 1984-06-16 | Two-way amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS613510A true JPS613510A (en) | 1986-01-09 |
Family
ID=14883518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12436284A Pending JPS613510A (en) | 1984-06-16 | 1984-06-16 | Two-way amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS613510A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935568U (en) * | 1972-06-26 | 1974-03-29 | ||
| JPS5974715A (en) * | 1982-10-22 | 1984-04-27 | Nippon Resuko:Kk | Bi-directional amplifier |
-
1984
- 1984-06-16 JP JP12436284A patent/JPS613510A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935568U (en) * | 1972-06-26 | 1974-03-29 | ||
| JPS5974715A (en) * | 1982-10-22 | 1984-04-27 | Nippon Resuko:Kk | Bi-directional amplifier |
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