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JPS5944167A - Power supply system to subscriber circuit - Google Patents

Power supply system to subscriber circuit

Info

Publication number
JPS5944167A
JPS5944167A JP57154930A JP15493082A JPS5944167A JP S5944167 A JPS5944167 A JP S5944167A JP 57154930 A JP57154930 A JP 57154930A JP 15493082 A JP15493082 A JP 15493082A JP S5944167 A JPS5944167 A JP S5944167A
Authority
JP
Japan
Prior art keywords
resistor
impedance
supply circuit
power supply
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.)
Pending
Application number
JP57154930A
Other languages
Japanese (ja)
Inventor
Toshiro Tojo
敏郎 東條
Mitsutoshi Ayano
綾野 光俊
Kiyoshi Shibuya
清 渋谷
Shinichi Ito
真一 伊藤
Yoshito Takeda
竹田 義人
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP57154930A priority Critical patent/JPS5944167A/en
Publication of JPS5944167A publication Critical patent/JPS5944167A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/001Current supply source at the exchanger providing current to substations
    • H04M19/005Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To obtain a power supply circuit where the termination impedance is constituted optionally and which has resistance to AC induction, by using two operational amplifiers of voltage follower connection. CONSTITUTION:The AC output impedance of the power supply circuit is expressed as R1B(1+ZB/R2B)+R1A(1+ZA/R2A), where R2B>>R1B and R2A>> R1A. Thus, when R2B=N.R1B and R2A=N.R1A, the AC output impedance is equal to the termination impedance Z, and it means that the AC output impedance is selected freely. In regulating the cut-off frequency of the circuitry comprising a capacitor CB, a resistor R3B and a capacitor CA and a resistor R3A to 50-200Hz taking the AC induction into account, since the rsistors R3A, R3B are large amount then the capacitors CA, CB can be of small value.

Description

【発明の詳細な説明】 へ (量)発ツ]の技術分野 本発明は電話Vζ等とアナログ伝送路を介してインタフ
ェースされる加入者約1!J回路KQす、特に市。
DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a subscriber interfaced with a telephone Vζ etc. via an analog transmission line. J circuit KQ, especially city.

話後に通話の為に必要なiI!1.流電流をイ1ム給し
、かつ電話イシ麺へ音声信号を送出する加入者回路給宕
・ξ方式%式% (8)従来技術とb;J角点 第1図は電子父換石の回ガ快対紀、部における従来ある
電子化給電回路の一例を示す図である。第1図において
、本回綿対応部は通話電流供給回路BSIおよびl3S
2によシ、電促i回糾りを経由して1U、断装置 K通
、話寛流Inを供給する。πを話装置の音声化−8は本
四かヌ幻応部の2脇4腺変換回路4Wにより4社式不平
価回路に伝達される0前記辿話Tiq、流供紹回路BS
、およびBS、は電話積置に所要の通話電流IBを供給
し得る抵抗4Fftを有すると共に、前記音声信号に幻
し−(は、極力減9全力えぬ様充分高インピーダンスを
有する必要かある。なお通話電流供給回路BS+および
BStiよ通話電流極性によるトランジスタTr、およ
びTrtの相異以外は総べて同一構成および同一特性を
具備するので、以後通話電流供給回路BS、のみに着目
して説明する。通話電流供給回路BSIにおいて、通話
電流IBは王としてトランジスタTr、および抵抗R1
から成る直列回路を通じて供給される。該トランジスタ
Tr、は、抵抗R+およびR2がら成る分圧回路、抵抗
RfおよびコンデンサCfから成る低域r波器、および
演算堀・幅器Aから構成される帰環ルーズを有している
。今通話電流IBによる通話電流供紹回MESiの電圧
降下をVB、分圧抵抗R2の端子IMJ寛圧をv8、演
其増巾器Aの逆相入力端子電圧をVl 、正相入力端子
電圧をVBとすると、演算増幅器Aの公知の特性によバ
1ン式が成立する。
iI needed for the call after the talk! 1. The subscriber circuit supplying the current current and transmitting the audio signal to the telephone line is based on the ξ method. (8) Conventional technology and b; It is a diagram showing an example of a conventional electronic power supply circuit in the Kaikai Kaiki Department. In Fig. 1, the part corresponding to this time is the communication current supply circuit BSI and l3S.
2, we will supply 1U, disconnection device K communication, and communication communication In via teleprompted i times. π is converted into voice by the speaking device - 8 is transmitted to the 4 company type unbalanced circuit by the 2 side 4 gland conversion circuit 4W of the main 4 or 4 illusion part
, and BS must have a resistance of 4 Fft capable of supplying the required communication current IB to the telephone station, and must have a sufficiently high impedance so as to prevent the interference from the voice signal from being reduced as much as possible. Note that the talk current supply circuits BS+ and BSti have the same configuration and characteristics except for the differences in the transistors Tr and Trt due to the talk current polarity, so the following explanation will focus only on the talk current supply circuit BS. In the talking current supply circuit BSI, the talking current IB is mainly connected to the transistor Tr and the resistor R1.
is supplied through a series circuit consisting of The transistor Tr has a voltage divider circuit made up of resistors R+ and R2, a low-frequency r waveform generator made up of a resistor Rf and a capacitor Cf, and a loop loop composed of an arithmetic trench/width circuit A. Now, the voltage drop of the communication current supply circuit MESi due to the communication current IB is VB, the terminal IMJ tolerance voltage of the voltage dividing resistor R2 is V8, the negative phase input terminal voltage of the amplifier A is Vl, and the positive phase input terminal voltage is If VB, then the Ban equation is established according to the known characteristics of the operational amplifier A.

R7 R1およびR2が充分大であるとすると、Rs   R
s   R+十& 故に通話電流供給回路BS、の等価抵抗をR1とすると
、 次にトランジスタTrtの等価抵抗をRTとすると、R
+ Rs RT f: RB −Rs :           
(4)2 故にトランジスタTr1の消費電力をWTとすると、R
,R8 WT : RT I B2ニー ・I B2(5)2 なお音声信号に対しては、通話電流供給回路BS。
R7 Assuming R1 and R2 are large enough, Rs R
s R + 1 & Therefore, if the equivalent resistance of the talking current supply circuit BS is R1, then if the equivalent resistance of the transistor Trt is RT, then R
+ Rs RT f: RB - Rs:
(4)2 Therefore, if the power consumption of transistor Tr1 is WT, then R
, R8 WT: RT I B2 Knee ・I B2 (5) 2 For voice signals, the speech current supply circuit BS.

の端子電圧をVB%演算増幅器Aの逆相入力端子電圧を
vt、正相入力端子電圧をv3とする、演算増幅器Aの
公知の特性によシ、 V2 = Vs ”: 0             
 (6)即ちトランジスタTrlには音声信号は殆んど
流れぬとと\なる。故に音声信号に対する通話電流供給
回路BSsの等価抵抗をrBとすると、&+Rf 以上の説明から明らかな如く、従来ある電子化給電回路
によれば、抵抗R1およびR1の値を充分大きく採シ、
抵抗R3の値を適当に定めることによシ、音声信号に対
する通話電流供給回路BSIおよび1stを充分高イン
ピーダンスに保ち乍ら、所要の通話電流IBを供給する
ことが可能となる。しかし、終端インピーダンスそのも
のの値、例えば900Ω+216μFXは600Ω+2
μFを心安とし、実装上のデメリットがあり、さらに、
給電回路のACインピーダンスが高くなるため父流訪導
に弱くなる欠点をもっている。
According to the known characteristics of operational amplifier A, where the terminal voltage of operational amplifier A is VB%, the negative phase input terminal voltage of operational amplifier A is vt, and the positive phase input terminal voltage is v3, V2 = Vs '': 0
(6) That is, almost no audio signal flows through the transistor Trl. Therefore, if the equivalent resistance of the speech current supply circuit BSs for the voice signal is rB, &+Rf As is clear from the above explanation, according to the conventional electronic power supply circuit, the values of the resistors R1 and R1 are set sufficiently large.
By appropriately determining the value of the resistor R3, it is possible to supply the required talking current IB while keeping the talking current supply circuits BSI and 1st for voice signals at sufficiently high impedance. However, the value of the termination impedance itself, for example 900Ω + 216μFX, is 600Ω + 2
μF is safe, but there are disadvantages in implementation, and
Since the AC impedance of the power supply circuit becomes high, it has the disadvantage of being vulnerable to father current conduction.

(2B)発明の目的 本発明は上記従来の欠点にiみ、終端インピーダンスを
任社に構成でき、かつその終端インピーダンスのN倍の
値を用意すればよく、かつ給電回路の低周波ACインピ
ーダンス′(i:DCインピーダンス位まで小さくして
、又流紡導に強くする給電方式を提供することを目的と
するものである。
(2B) Purpose of the Invention In view of the above-mentioned drawbacks of the conventional art, the present invention is capable of configuring the terminal impedance as desired, and it is sufficient to prepare a value N times the terminal impedance, and the low frequency AC impedance of the power supply circuit ' (i: The purpose is to provide a power supply system that reduces the impedance to the level of DC impedance and is resistant to flow spinning.

(5)発明の構成 そしてこの目的は本発明によれば、ディジタル電子交換
機用加入者回路において、ボルデージフォ四−接続され
た第1の演算増幅器と、該第1の演算増幅器の出力を第
1の抵抗器を介して通話線の一方に接続し、該第1の抵
抗器と通話線の交点を第2の抵抗器を介しで複素インピ
ーダンスZB及びボルテージフォロー接続された第2の
演舞増幅器へ接続し、該複床インピーダンスZBの他端
をアースまたは低インピーダンス電圧源に接続し、該第
2の演算増幅器の出力をコンデンサを介して第3の抵抗
器及び該第1の演算増幅器の入力部へ接続し、該第3の
抵抗器の他端を前記アースまたは低インピーダンス電圧
源に接続することにより形成される通話電流供給回路と
、前記通話線の他方に対象に接続された前述の通話電流
供給回路と同一構造の通話電流供給回路とを具備するこ
とを特徴とする加入者回路給電方式を提供することによ
って達成される。
(5) Structure and object of the invention According to the present invention, in a subscriber circuit for a digital electronic exchange, there is provided a first operational amplifier which is voltage-connected, and an output of the first operational amplifier. connected to one of the communication lines through a resistor, and the intersection of the first resistor and the communication line is connected via a second resistor to a complex impedance ZB and a second performance amplifier connected by voltage follow. , the other end of the double floor impedance ZB is connected to ground or a low impedance voltage source, and the output of the second operational amplifier is connected to a third resistor and the input of the first operational amplifier via a capacitor. and a communication current supply circuit formed by connecting the other end of the third resistor to the ground or the low impedance voltage source, and the above-mentioned communication current supply circuit connected to the other end of the communication line. This is achieved by providing a subscriber circuit power supply system characterized by comprising a communication current supply circuit having the same structure as the above.

(6)発明の実施例 以下本発明の実施例を図面によって詳述する0第2図は
本発明による給電回路の実施例を示す回路7 テh ’
)、VAr V n Vi k源AIA r AHA 
t AIB t A2Bは演q−垢幅器、B+Ae ’
fkhrRshrRsBe &n+Rsnは抵抗器、C
A、CBi−J:′:lンデンサ、Z A p Z B
は防振用インピーダンスをそれぞれ示している。アンプ
゛AB。
(6) Embodiments of the invention Below, embodiments of the invention will be described in detail with reference to the drawings. Figure 2 is a circuit 7 showing an embodiment of the power supply circuit according to the invention.
), VAr V n Vi k source AIA r AHA
t AIB t A2B is the operator q-scaler, B+Ae'
fkhrRshrRsBe &n+Rsn is a resistor, C
A, CBi-J:′:lndensa, Z A p Z B
indicates the vibration isolation impedance. Amplifier AB.

AA’−”1mは飽和を圧及びB、A緑の通話侶号が抵
抗R2A+R2nをブ1゛シて入力するので、その入力
通話イ、:J→じ−の最大振巾を考息して、VAeVg
が次まる。
AA'-"1m is the saturation pressure and B, A green caller number is input through resistor R2A+R2n, so consider the maximum amplitude of the input call number: J→J-. , VAeVg
comes next.

(0uit、J:VB=−2v*VA−−46vkVC
Fa>’spj る)CAIRIA又r、l:CnRs
nはDCイ(= @ (VA o r V u )  
とAC佃号の加算梅の匁朱をもつ。CA Rs A又は
CD&Bは、アンプA2A又はAffiBの音声帯域A
C化信号力を無歪与でアンプAs A I又はAIBの
十端子へ伝達するため、その礼定舷は十分大きくしなけ
れはAらなイ0RIA+ムIBは本給電回路のDC出力
インピータンスとなる、一般に2001L又1j220
Ω位に設定されるoRtli及びZB又はR2A及びZ
Aは本給電回路のAC出力インピーダンスをきめるフィ
ードバック回路を構成している。例えば、BorA線に
Vinの入力信号がめったとすると、アングAtB又嬶
!ムには R2H+ZB        R2A q−Z)。
(0uit, J:VB=-2v*VA--46vkVC
Fa>'spjru) CAIRIAmata r, l:CnRs
n is DC i (= @ (VA or V u )
and has the name of AC Tsukuda's adding plum. CA Rs A or CD&B is audio band A of amplifier A2A or AffiB.
In order to transmit the converted signal power to the terminals of the amplifiers A I or AIB without distortion, its rating must be sufficiently large. Generally 2001L or 1j220
oRtli and ZB or R2A and Z set to Ω
A constitutes a feedback circuit that determines the AC output impedance of this power supply circuit. For example, if an input signal of Vin is rarely applied to the BorA line, Ang AtB is also! R2H+ZB R2A q-Z).

CB R3H又はCA R3Aのしゃ断層波数が音声;
t;・域よシも十分に小さいとすればアンプAIB又は
AIA にの信号が出力烙れる。従っでR2B > B
+ B r Rz人> B+ Aであれは、本給電回路
のAC出力インピーダンスは以−トの通シである。
CB R3H or CA R3A cutoff wave number is audio;
If the range and the range are sufficiently small, the signal to the amplifier AIB or AIA will be output. Therefore, R2B > B
+ B r Rz > B + A, the AC output impedance of this power supply circuit is as follows.

AC出力インピータンス & B        Rz h (仮定)   R2Bmべ・R,B p  R2人=N
@RIAZ;終端インピーダンスとおくと、 AC出力インピーダンス =2 よって、前記の仮定(即ちRIEとR2nの比をR,B
ON倍、RtAトRz、<)比ヲRIA (7) N 
fig ドr ;’;> )をおけば本9%回路のAC
出力インピーダンスは自8 山VCS択−C’@、かつ&B+Z#1R2AZAはB
+ B+ B+ A IZのじ」数もしくはそのものの
8倍の値・r用意すれば、実現できる。
AC output impedance & B Rz h (assumption) R2Bmbe・R, B p R2 people=N
@RIAZ; If we set the termination impedance as AC output impedance = 2, then the above assumption (i.e., the ratio of RIE and R2n to R, B
ON times, RtA to Rz, <) RIA (7) N
If you put fig dor;';>), the AC of this 9% circuit
Output impedance is 8, VCS selection - C'@, and &B+Z#1R2AZA is B
+B+B+A This can be achieved by preparing the number ``IZ'' or a value 8 times its value ・r.

例えば R1,\=R+r+=200Ω1Z=600Ω
+1μF。
For example, R1,\=R+r+=200Ω1Z=600Ω
+1 μF.

N=500とすると&*=RtB=100000Ω=1
00KQ。
If N=500, &*=RtB=100000Ω=1
00KQ.

Zh=ZB=50000Q+Cr、004μFとなる。Zh=ZB=50000Q+Cr, 004μF.

アンプA+ B p A4 Aの入力インターダンスは
極めて^いので、RsB* R3Aは佐めて大きな伽と
してもアンプAIB + AHAのDC出力に影響はな
い。又波誘導を′4應し−CCBRsB及びCA島Aの
しゃ断周数数セ ’r、50Hz〜200Hzにおくとしても、’RsA
 + Ranが太きな値をとシうるので、C人+Cni
ユ小さな値です?Lr(、例えばRsh”JLsn=2
00’lyΩとプるとCut off同波形を100H
zにツーると となる。以上より抵抗を大きく、容量を小きく設定でき
るプこのに笑装効蘂のj−ぐれた、J:9フレキシブル
な給電回路を構成できる。
Since the input interdance of amplifier A+ B p A4 A is extremely low, even if RsB*R3A is large, it will not affect the DC output of amplifier AIB + AHA. Also, even if the wave induction is set to 50 Hz to 200 Hz and the cutoff frequency number of CCBRsB and CA island A is set to 50Hz to 200Hz, 'RsA
+Ran can take a thick value, so C person + Cni
Is it a small value? Lr (, for example, Rsh”JLsn=2
If you press 00'lyΩ, Cut off the same waveform to 100H.
If you go to z, it becomes. As described above, it is possible to construct a flexible power supply circuit with a high resistance and a low capacitance.

(f)  発明の効果 本発明によれば2を目的の終端インピーダンスにすれは
、A−Bmからみた終端インピーダンスを2とする事が
でき、かつ実際にはZを用いずN (−−B+ x )
をZxとしており”はよく、ノ・イブリノドIC化にむ
いた加入者回路給電方式を供し得るといった効果大なる
ものである。
(f) Effects of the Invention According to the present invention, if the desired terminal impedance is set to 2, the terminal impedance seen from A-Bm can be set to 2, and in fact, without using Z, N (--B+ x )
Zx is used to provide a subscriber circuit power supply system that is suitable for use in non-intrusive ICs.

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

第1図は従来の電子化給電回路、第2Vllll′i本
発明による力p入省回路給電方式を適用した電子化給電
回路である。 図面において、置は電話線、4Wは2紡4線変挨回路、
BSI、BS2は通話電流供給回路、VAIvBは覧源
、4 A I AHA + A+ B 1−A2E演算
演算器、ルA I R2A RIIA HR1B+R・
2D 、■も3Bに1抵抗器、C人+CB+はコンデン
サ、ZA#ZBは調整用インピーダンスをそれぞれ示し
、て・いる。
FIG. 1 shows a conventional electronic power supply circuit and a second electronic power supply circuit to which the input-saving circuit power supply system of the present invention is applied. In the drawing, the position is a telephone line, 4W is a 2-wire 4-wire changing circuit,
BSI, BS2 are call current supply circuits, VAIvB is a reference source, 4 AI AHA + A+ B 1-A2E arithmetic operation unit, A I R2A RIIA HR1B+R・
2D and ■ also show one resistor in 3B, C + CB + shows a capacitor, and ZA # ZB shows the adjustment impedance, respectively.

Claims (1)

【特許請求の範囲】[Claims] ディジタル電子文換機用加入者回路において、ボルテー
ジフォロー接続されたあ1の演y′?、増幅器と、該第
1の演算楕幅器の出力′t−第1の抵抗器を介して通話
線の一方に接続し、該第1の抵抗器と通話線の父点を第
2の抵抗器を介して複素インピーダンスZB及びボルテ
ージフォロー接続された第2の演算J冒幅器へ接続し、
該複素インピーダンスZBの他端を7−スまたは低イン
ピーダンス電圧源に接続し、該第2の演算増幅器の出力
をコンテン?を介して凧3の抵抗器及び該第1の@算増
幅器の入力部へ接続し、該第3の抵抗器の他端を前記ア
ースまたは低インピーダンス1L圧源に接続することに
よシ形成される通話電流供給回路と、前記通話線の他方
に対象に接続された前述の通話電流供給回路と同−楢造
の通話電流供給回路とを具備すること全特徴とする加入
者回路給tb、方式。
In the subscriber circuit for a digital electronic language exchanger, the voltage follow connection is performed. , an amplifier, and the output 't of the first operational ellipsoid - connected to one side of the communication line via a first resistor, and the first resistor and the father point of the communication line are connected to a second resistor. connected to the complex impedance ZB and voltage follow-connected second arithmetic amplifier J through the amplifier,
The other end of the complex impedance ZB is connected to a voltage source or a low impedance voltage source, and the output of the second operational amplifier is connected to a content? through the kite 3 resistor and the input of the first arithmetic amplifier, and the other end of the third resistor is connected to the ground or to the low impedance 1L voltage source. A system for subscriber circuit supply tb, characterized in that it comprises a communication current supply circuit of the same type as the above-mentioned communication current supply circuit and a communication current supply circuit connected to the other side of the communication line. .
JP57154930A 1982-09-06 1982-09-06 Power supply system to subscriber circuit Pending JPS5944167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57154930A JPS5944167A (en) 1982-09-06 1982-09-06 Power supply system to subscriber circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57154930A JPS5944167A (en) 1982-09-06 1982-09-06 Power supply system to subscriber circuit

Publications (1)

Publication Number Publication Date
JPS5944167A true JPS5944167A (en) 1984-03-12

Family

ID=15595047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57154930A Pending JPS5944167A (en) 1982-09-06 1982-09-06 Power supply system to subscriber circuit

Country Status (1)

Country Link
JP (1) JPS5944167A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60253364A (en) * 1984-05-30 1985-12-14 Fujitsu Ltd Internal termination type power feed circuit
US4982422A (en) * 1988-09-19 1991-01-01 Fujitsu Limited Terminating circuit in a battery feed circuit of an electronic exchange system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60253364A (en) * 1984-05-30 1985-12-14 Fujitsu Ltd Internal termination type power feed circuit
US4982422A (en) * 1988-09-19 1991-01-01 Fujitsu Limited Terminating circuit in a battery feed circuit of an electronic exchange system

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