JPS6338438U - - Google Patents
Info
- Publication number
- JPS6338438U JPS6338438U JP13155186U JP13155186U JPS6338438U JP S6338438 U JPS6338438 U JP S6338438U JP 13155186 U JP13155186 U JP 13155186U JP 13155186 U JP13155186 U JP 13155186U JP S6338438 U JPS6338438 U JP S6338438U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- ringer
- low frequency
- signal
- speaker
- 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
- 230000003321 amplification Effects 0.000 claims 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims 4
- 238000001514 detection method Methods 0.000 claims 3
- 239000003990 capacitor Substances 0.000 claims 2
- 230000000087 stabilizing effect Effects 0.000 claims 2
- 230000005236 sound signal Effects 0.000 claims 1
Description
第１図は本考案に係る無線電話機のリンガース
ピーカミユート回路の一実施例を示す回路図、第
２図は従来の無線電話機のリンガースピーカミユ
ート回路である。
主な図番の説明、６……ドライバートランジス
タ、７……安定化コンデンサ、１３……第１切換
スイツチ、１４……第２切換スイツチ、２０……
第１スイツチングトランジスタ、３０……バイパ
ス抵抗。
FIG. 1 is a circuit diagram showing an embodiment of a ringer speaker mute circuit of a radio telephone according to the present invention, and FIG. 2 shows a ringer speaker mute circuit of a conventional radio telephone. Explanation of main figure numbers, 6...Driver transistor, 7...Stabilizing capacitor, 13...First changeover switch, 14...Second changeover switch, 20...
First switching transistor, 30...bypass resistor.
Claims (1)
て送受話が出来る子機とからなる無線電話機にお
いて、子機を待機状態又は、通話状態に切換える
切換スイツチと、親機を介し送信される呼出し信
号及び音声信号を受信する受信回路と、該受信回
路よりリンガー信号を検出するリンガー信号検出
回路と、呼者よりの音声信号及び該リンガー信号
検出回路よりの出力信号を増幅する低周波増幅回
路と、該低周波増幅回路を介し増幅された音声信
号のみを放音する受話スピーカと、前記リンガー
信号検出回路よりの出力信号のみを放音するリン
ガースピーカと、前記低周波増幅回路に対し、バ
イパス電圧を加えるバイパス抵抗と前記低周波増
幅回路の動作安定化のために接続した安定化コン
デンサとよりなり、前記切換スイツチを待機状態
に切換えると同時に前記バイパス抵抗を介し、前
記低周波増幅回路及び、該低周波増幅回路に接続
している安定化コンデンサにバイアス電圧を加え
るようにすることにより前記リンガースピーカよ
り切換時に発生するノイズが放音されないように
したことを特徴とする無線電話機のリンガースピ
ーカミユート回路。 In a wireless telephone consisting of a base unit connected to a wired telephone line and a handset that can send and receive calls over the wireless line, the information is transmitted via the base unit and a switch that switches the handset to standby or talking mode. A receiving circuit that receives a calling signal and a voice signal, a ringer signal detection circuit that detects a ringer signal from the receiving circuit, and a low frequency amplification circuit that amplifies the voice signal from the caller and the output signal from the ringer signal detection circuit. a receiver speaker that emits only the audio signal amplified through the low frequency amplification circuit; a ringer speaker that emits only the output signal from the ringer signal detection circuit; and a bypass for the low frequency amplification circuit. It consists of a bypass resistor that applies voltage and a stabilizing capacitor connected to stabilize the operation of the low frequency amplifier circuit, and at the same time when the changeover switch is switched to the standby state, the low frequency amplifier circuit and A ringer speaker for a wireless telephone, characterized in that a bias voltage is applied to a stabilizing capacitor connected to the low frequency amplification circuit so that noise generated at the time of switching is not emitted from the ringer speaker. Ute circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13155186U JPS6338438U (en) | 1986-08-28 | 1986-08-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13155186U JPS6338438U (en) | 1986-08-28 | 1986-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6338438U true JPS6338438U (en) | 1988-03-12 |
Family
ID=31030106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13155186U Pending JPS6338438U (en) | 1986-08-28 | 1986-08-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6338438U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996007262A1 (en) * | 1994-08-31 | 1996-03-07 | Sony Corporation | Communication terminal |
-
1986
- 1986-08-28 JP JP13155186U patent/JPS6338438U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996007262A1 (en) * | 1994-08-31 | 1996-03-07 | Sony Corporation | Communication terminal |
| US5930352A (en) * | 1994-08-31 | 1999-07-27 | Sony Corporation | Communication terminal apparatus |
| CN1106104C (en) * | 1994-08-31 | 2003-04-16 | 索尼公司 | Communication terminal |
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