JPH02120957U - - Google Patents
Info
- Publication number
- JPH02120957U JPH02120957U JP2854189U JP2854189U JPH02120957U JP H02120957 U JPH02120957 U JP H02120957U JP 2854189 U JP2854189 U JP 2854189U JP 2854189 U JP2854189 U JP 2854189U JP H02120957 U JPH02120957 U JP H02120957U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- current source
- constant current
- bias point
- collector
- 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
- 230000005236 sound signal Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案の一実施例のスピーチネツトワ
ーク受話回路の回路図、第２図は第１図を具体化
した回路図、第３図は従来の同回路の回路図であ
る。
１……増幅器、２……スピーカ、３，４，５…
…定電流源。
FIG. 1 is a circuit diagram of a speech network reception circuit according to an embodiment of the present invention, FIG. 2 is a circuit diagram embodying FIG. 1, and FIG. 3 is a conventional circuit diagram of the same circuit. 1...Amplifier, 2...Speaker, 3, 4, 5...
...constant current source.
Claims (1)
器の出力信号を増幅する第１のトランジスタと、
該トランジスタと電源間に接続された第１の定電
流源と、上記第１のトランジスタのコレクタと出
力バイアス点に接続された抵抗と、上記出力バイ
アス点と上記電源間に接続された第２の定電流源
と、上記第１のトランジスタのコレクタにベース
が接続され出力側が上記出力バイアス点と接地と
に接続された第２のトランジスタとを具備するス
ピーチネツトワーク受話回路において、 上記第１のトランジスタのコレクタと接地間に
第３の定電流源を接続し、該第３の定電流源の電
流を上記第１の定電流源の電流よりも若干大きく
設定し、上記出力バイアス点の温度補償を行うこ
とを特徴とするスピーチネツトワーク受話回路。[Claims for Utility Model Registration] An amplifier that amplifies an input audio signal, a first transistor that amplifies an output signal of the amplifier,
a first constant current source connected between the transistor and the power supply; a resistor connected to the collector of the first transistor and the output bias point; and a second constant current source connected between the output bias point and the power supply. A speech network receiving circuit comprising a constant current source and a second transistor having a base connected to the collector of the first transistor and an output side connected to the output bias point and ground, the first transistor A third constant current source is connected between the collector and ground, and the current of the third constant current source is set to be slightly larger than the current of the first constant current source, and temperature compensation at the output bias point is performed. A speech network receiving circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2854189U JPH02120957U (en) | 1989-03-15 | 1989-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2854189U JPH02120957U (en) | 1989-03-15 | 1989-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02120957U true JPH02120957U (en) | 1990-10-01 |
Family
ID=31251996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2854189U Pending JPH02120957U (en) | 1989-03-15 | 1989-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02120957U (en) |
-
1989
- 1989-03-15 JP JP2854189U patent/JPH02120957U/ja active Pending