JPS6349834U - - Google Patents
Info
- Publication number
- JPS6349834U JPS6349834U JP14278386U JP14278386U JPS6349834U JP S6349834 U JPS6349834 U JP S6349834U JP 14278386 U JP14278386 U JP 14278386U JP 14278386 U JP14278386 U JP 14278386U JP S6349834 U JPS6349834 U JP S6349834U
- Authority
- JP
- Japan
- Prior art keywords
- winding
- input terminal
- transformer
- differential amplifier
- providing
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
- 101710170230 Antimicrobial peptide 1 Proteins 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
Description
第１図、第２図ａおよびｂは本考案の一実施例
を示す回路図、第３図は従来の２線式通話路回路
の具体例を示す回路図である。
１〜９……端子、ＡＭＰ１……差動増幅器、Ａ
ＭＰ２……増幅器、Ｔ……整合用トランス、１１
……帰還インピーダンス、１２……シリアル／パ
ラレル変換回路（Ｓ／Ｐ）、Ｒ１〜Ｒ４……抵抗
器、Ｃ４−１〜Ｃ４−４……コンデンサ、ＳＷ１
〜ＳＷ４……スイツチ。
1, 2a and 2b are circuit diagrams showing one embodiment of the present invention, and FIG. 3 is a circuit diagram showing a specific example of a conventional two-wire communication line circuit. 1 to 9...Terminal, AMP1...Differential amplifier, A
MP2...Amplifier, T...Matching transformer, 11
...Feedback impedance, 12...Serial/parallel conversion circuit (S/P), R1 to R4 ...Resistor, C4-1 to C4-4 ...Capacitor, SW1
~SW4...Switch.
Claims (1)
これに結合した第２の巻線とを有するトランスと
、このトランスの前記第２の巻線の両端間電圧を
印加された第１の入力端と帰還信号を与えるため
の第２の入力端とを有する差動増幅器と、前記ト
ランスの前記第２の巻線の両端間および前記差動
増幅器の前記第２の入力端に出力を与える増幅器
と、前記差動増幅器前記第２の入力端および出力
端の間に接続されており複数のコンデンサをそれ
ぞれスイツチを介して接続した容量可変部を有す
る帰還インピーダンス回路とを備えており、外部
から制御用データを与えて各前記スイツチのオン
オフ制御を行なうようにしてあることを特徴とす
る２線式通話路回路。 a transformer having a first winding for connection to two wires on the exchange side and a second winding coupled thereto; and a first winding to which a voltage is applied across the second winding of the transformer. a differential amplifier having an input terminal for providing a feedback signal and a second input terminal for providing a feedback signal; and a feedback impedance circuit connected between the second input terminal and the output terminal of the differential amplifier and having a capacitance variable section in which a plurality of capacitors are respectively connected via switches. 2. A two-wire communication path circuit, wherein control data is given from the switch to control on/off of each of the switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14278386U JPS6349834U (en) | 1986-09-17 | 1986-09-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14278386U JPS6349834U (en) | 1986-09-17 | 1986-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6349834U true JPS6349834U (en) | 1988-04-04 |
Family
ID=31051839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14278386U Pending JPS6349834U (en) | 1986-09-17 | 1986-09-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6349834U (en) |
-
1986
- 1986-09-17 JP JP14278386U patent/JPS6349834U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6214815U (en) | ||
| JPS6349834U (en) | ||
| JPS60111132U (en) | Digital data input circuit | |
| JPS6340899U (en) | ||
| JPH0390157U (en) | ||
| JPS61195504U (en) | ||
| JPS6289848U (en) | ||
| JPS6415416U (en) | ||
| JPS62105648U (en) | ||
| JPH0224619U (en) | ||
| JPH0464827U (en) | ||
| JPH01178634U (en) | ||
| JPS63102004U (en) | ||
| JPH0457942U (en) | ||
| JPS6040135U (en) | switching circuit | |
| JPS61146015U (en) | ||
| JPS62133436U (en) | ||
| JPS6232640U (en) | ||
| JPS6316721U (en) | ||
| JPH01147524U (en) | ||
| JPS61154040U (en) | ||
| JPH0359731U (en) | ||
| JPS63171100U (en) | ||
| JPS63108219U (en) | ||
| JPS61136308U (en) |