JPH0623085Y2 - Operation display circuit of terminal equipment - Google Patents
Operation display circuit of terminal equipmentInfo
- Publication number
- JPH0623085Y2 JPH0623085Y2 JP17401587U JP17401587U JPH0623085Y2 JP H0623085 Y2 JPH0623085 Y2 JP H0623085Y2 JP 17401587 U JP17401587 U JP 17401587U JP 17401587 U JP17401587 U JP 17401587U JP H0623085 Y2 JPH0623085 Y2 JP H0623085Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- light emitting
- telephone
- unnecessary power
- speech
- 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 - Lifetime
Links
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Devices For Supply Of Signal Current (AREA)
Description
【考案の詳細な説明】 (イ)産業上の利用分野 本考案は、電話機等有線端末機器の動作状態を発光素子
により表示する動作表示回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to an operation display circuit for displaying an operation state of a wired terminal device such as a telephone with a light emitting element.
(ロ)従来の技術 従来斯種端末機器、例えば電話機の動作表示回路として
は第２図に示すものが知られている。第２図において、
（Ｌ１）、（Ｌ２）は電話回路に接続される端子、(1)
はダイオードブリッジで電話回線から供給される電源の
極性が反転されても電話機(20)に一定の極性を与えるた
めのもの、(2)は電源供給用のトランジスタで導通する
ことにより回路に電源を供給する。また(3)は通常、ス
ピーチネットワーク回路と呼ばれ、電話機の通話機能を
つかさどり、ＩＣにより構成されている。スピーチネッ
トワーク回路(3)は通話回路(5)と、この通話回路(5)で
消費される電力以外の電力（不要電力）を消費する不要
電力消費回路(4)から構成され、通話回路(5)には送話用
マイク(6)、受話用スピーチ(7)が接続されている。一
方、不要電力消費回路(4)にはグランドとの間に不要電
力を消費するための抵抗(8)が接続されている。(B) Conventional Technology As an operation display circuit of such a terminal device, for example, a telephone, the one shown in FIG. 2 is known. In FIG.
(L 1 ) and (L 2 ) are terminals connected to the telephone circuit, (1)
The diode bridge provides a certain polarity to the telephone (20) even if the polarity of the power supplied from the telephone line is reversed, and (2) supplies power to the circuit by making it conductive with a transistor for power supply. Supply. Further, (3) is usually called a speech network circuit, which controls the telephone call function of the telephone and is constituted by an IC. The speech network circuit (3) is composed of a speech circuit (5) and an unnecessary power consumption circuit (4) that consumes power (unnecessary power) other than the power consumed by the speech circuit (5). A microphone for transmission (6) and a speech for reception (7) are connected to). On the other hand, a resistor (8) for consuming unnecessary power is connected to the ground in the unnecessary power consumption circuit (4).
そして、この電話機(10)が動作状態であることを表示す
るために、発光ダイオード(9)がトランジスタ(2)とグラ
ンド間にスピーチネットワーク回路(3)と並列に設けら
れている。尚、(10)は発光ダイオード(9)に流れる電流
を制限する抵抗、(11)は音声信号が発光ダイオード(9)
を介して流れないようにするための交流阻止用のチョー
クコイルである。A light emitting diode (9) is provided in parallel with the speech network circuit (3) between the transistor (2) and the ground to indicate that the telephone (10) is in an operating state. In addition, (10) is a resistor that limits the current flowing through the light emitting diode (9), and (11) is a sound signal when the light emitting diode (9)
This is a choke coil for AC blocking so that it does not flow through.
このような従来回路においては、端子（Ｌ１）−
（Ｌ２）間の電圧をＶ、電話機(20)に流れ込む電流を
Ｉ、不要電力消費回路(4)に流れ込む電流をＩ１通話回
路(5)に流れ込む電流をＩ２とすると、電話機(20)の直
流インピーダンスＺは、（Ｉ３は無視） Ｚ＝Ｖ／Ｉ＝Ｖ（Ｉ１＋Ｉ２） …(1) となる。ここで、直流インピーダンスＺは、端末設備等
規則（昭和６０年郵政省令第３１号）で規定される範囲
内でなければならず、交換機から電話機までの距離、消
費電力の大小によらず満足しなければならない。従っ
て、スピーチネットワーク回路(3)は、(1)式より例えば
通話回路(5)の消費電流Ｉ２が多くなるとＩ１を少なく
して全体的にＺをある範囲内に維持し、Ｉ１が多くなる
とＩ２を少なくして同様に直流インピーダンスＺの値を
ある範囲内に維持するのである。In such a conventional circuit, the terminal (L 1 ) −
If the voltage between (L 2 ) is V, the current flowing into the telephone (20) is I, and the current flowing into the unnecessary power consumption circuit (4) is I 2 , the current flowing into the I 1 speech circuit (5) is I 20 DC impedance Z of () is (I 3 is ignored) Z = V / I = V (I 1 + I 2 ) ... (1) Here, the DC impedance Z must be within the range specified by the regulations for terminal equipment (the Ministry of Posts and Telecommunications Ordinance No. 31, 1985), and it is satisfied regardless of the distance from the exchange to the telephone and the magnitude of power consumption. There must be. Therefore, the speech network circuit (3) keeps Z within a certain range by decreasing I 1 when the consumption current I 2 of the speech circuit (5) increases, for example, according to the formula (1), and I 1 is When it increases, I 2 is decreased and similarly the value of the DC impedance Z is maintained within a certain range.
次に電話機の動作状態を示す発光ダイオード(9)が加わ
った場合には、発光ダイオード(9)に流れ込む電流をＩ
３とすると、電話機の直流インピーダンスＺ′は、 Ｚ′＝Ｖ／Ｉ＝Ｖ／（Ｉ１＋Ｉ２＋Ｉ３） …(2) となる。従って、供給電流Ｉが少ない場合、Ｉ１を減ら
しても発光ダイオード(9)に流れる電流Ｉ３の分だけは
通話回路(5)に流れるＩ２が少なくなり、供給電流が通
話機能のために有効に使用されないという問題がある。
また、交流音声信号がＬＥＤ(9)を通って流れないよう
にするため、チョークコイル(11)を接続しなければなら
ず経済的に不利であるという問題がある。Next, when the light emitting diode (9) indicating the operating state of the telephone is added, the current flowing into the light emitting diode (9) is I
3 and when the DC impedance of the telephone Z 'is, Z' = V / I = V / (I 1 + I 2 + I 3) ... it becomes (2). Therefore, when the supply current I is small, even if I 1 is reduced, the current I 3 flowing through the light emitting diode (9) is reduced by I 2 flowing through the communication circuit (5), and the supply current is required for the communication function. There is a problem that it is not used effectively.
Also, there is a problem in that it is economically disadvantageous because the choke coil (11) must be connected in order to prevent the AC audio signal from flowing through the LED (9).
(ハ)考案が解決しようとする問題点 本考案は、上記問題点、即ち電話機の動作状態を表示す
るための発光ダイオードを接続した場合に供給電流が通
話機能のために有効に使用されないという点および交流
阻止用のチョークコイルを接続しなければならないので
経済的に不利であるという点を解決するものである。(C) Problems to be solved by the present invention The present invention has the above-mentioned problems, that is, when the light emitting diode for displaying the operation state of the telephone is connected, the supply current is not effectively used for the call function. It is also an economical disadvantage because it is necessary to connect a choke coil for AC blocking.
(ニ)問題点を解決するための手段 本考案は、回線に接続され通話回路と不要電力消費回路
とからなるスピーチネットワーク回路とグランドとの間
に、不要電力消費回路に接続された発光素子を設け、不
要電力により発光素子を点灯させて動作状態を表示する
ものである。(D) Means for Solving the Problems The present invention provides a light emitting element connected to an unnecessary power consumption circuit between a speech network circuit connected to a line and comprising a speech circuit and an unnecessary power consumption circuit and a ground. It is provided to turn on the light emitting element by unnecessary power and display the operating state.
(ヘ)実施例 以下本考案を第１図に従って説明する。第１図は本考案
一実施例の回路図であり、第２図と同一個所には同一符
号を付して説明を省略する。第１図の本考案一実施例に
おいて第２図の従来例と異なる点は、電話機(20)の動作
状態を表示する発光ダイオード(9)を、スピーチネット
ワーク回路(3)とグランドの間に、スピーチネットワー
ク回路を構成する不要電力消費回路(4)に接続して設け
た点である。(F) Embodiment The present invention will be described below with reference to FIG. FIG. 1 is a circuit diagram of one embodiment of the present invention. The same parts as those in FIG. The difference between the embodiment of the present invention shown in FIG. 1 and the conventional example shown in FIG. 2 is that a light emitting diode (9) indicating the operating state of the telephone (20) is provided between the speech network circuit (3) and the ground. The point is that it is connected to the unnecessary power consumption circuit (4) that constitutes the speech network circuit.
これにより、前記(2)式に示した発光ダイオード(9)に流
れる電流Ｉ３がなくなるので、供給電流Ｉが例え少なく
なっても通話機能のために使用される電流Ｉ２が少なく
なることはなく、供給電流が通話機能のために有効に使
用され、Ｉ２のＩに対する効率が良くなる。As a result, the current I 3 flowing through the light emitting diode (9) shown in the equation (2) is eliminated, so that the current I 2 used for the communication function is reduced even if the supply current I is reduced. Instead, the supply current is effectively used for the speech function and the efficiency of I 2 for I is improved.
さらに、発光ダイオード(9)を不要電力消費回路(4)に接
続して設けたので、第２図の従来例において使用してい
た抵抗(8)およびチョークコイル(11)が不要となり、部
品点数を削減することができる。Further, since the light emitting diode (9) is connected to the unnecessary power consumption circuit (4), the resistor (8) and the choke coil (11) used in the conventional example of FIG. 2 are unnecessary, and the number of parts is reduced. Can be reduced.
(ト)考案の効果 以上説明したように本考案によれば、電話機等有線端末
機器への供給電流を通話機能のために有効に使用するこ
とができ、且つ電話機の動作状態を表示するための動作
表示回路を不要電力を利用して駆動することができるの
で、電力のムダがなく極めて効率のよい端末機器を提供
でき、さらに動作表示回路に関連する部品を削減できる
という効果も得られる。(G) Effect of the Invention As described above, according to the present invention, the current supplied to the wired terminal equipment such as the telephone can be effectively used for the call function, and the operation state of the telephone can be displayed. Since the operation display circuit can be driven by using unnecessary power, it is possible to provide a highly efficient terminal device with no waste of power, and further it is possible to reduce the number of parts related to the operation display circuit.
第１図は本考案一実施例の回路ブロック図、第２図は従
来例の回路ブロック図である。 (2)…電源供給用トランジスタ、(3)…スピーチネットワ
ーク回路、(4)…不要電力消費回路、(5)…通話回路、
(6)…送話用マイク、(7)…受話用スピーカ、(9)…発光
ダイオード、(10)…抵抗、(20)…電話機。FIG. 1 is a circuit block diagram of an embodiment of the present invention, and FIG. 2 is a circuit block diagram of a conventional example. (2) ... Power supply transistor, (3) ... Speech network circuit, (4) ... Unnecessary power consumption circuit, (5) ... Communication circuit,
(6) ... microphone for transmission, (7) ... speaker for reception, (9) ... light emitting diode, (10) ... resistor, (20) ... telephone.
Claims (1)
路とからなるスピーチネットワーク回路とグランドとの
間に、該不要電力消費回路に接続された発光素子を設
け、該不要電力により該発光素子を点灯させて動作状態
を表示することを特徴とする端末機器の動作表示回路。1. A light emitting device connected to the unnecessary power consuming circuit is provided between a speech network circuit connected to a line and composed of a speech circuit and an unnecessary power consuming circuit and a ground, and the light emitting device is driven by the unnecessary power. An operation display circuit of a terminal device, which lights up to display an operation state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17401587U JPH0623085Y2 (en) | 1987-11-13 | 1987-11-13 | Operation display circuit of terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17401587U JPH0623085Y2 (en) | 1987-11-13 | 1987-11-13 | Operation display circuit of terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0178451U JPH0178451U (en) | 1989-05-26 |
| JPH0623085Y2 true JPH0623085Y2 (en) | 1994-06-15 |
Family
ID=31465892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17401587U Expired - Lifetime JPH0623085Y2 (en) | 1987-11-13 | 1987-11-13 | Operation display circuit of terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0623085Y2 (en) |
-
1987
- 1987-11-13 JP JP17401587U patent/JPH0623085Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0178451U (en) | 1989-05-26 |
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