JPS58176209U - Tape recorder muting circuit - Google Patents
Tape recorder muting circuitInfo
- Publication number
- JPS58176209U JPS58176209U JP7445682U JP7445682U JPS58176209U JP S58176209 U JPS58176209 U JP S58176209U JP 7445682 U JP7445682 U JP 7445682U JP 7445682 U JP7445682 U JP 7445682U JP S58176209 U JPS58176209 U JP S58176209U
- Authority
- JP
- Japan
- Prior art keywords
- muting
- transistor
- base
- control transistor
- conductive
- 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
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来例を示す回路図、第２図は本考案の一実施
例を示す回路図である。FIG. 1 is a circuit diagram showing a conventional example, and FIG. 2 is a circuit diagram showing an embodiment of the present invention.
Claims (1)
ていると共に導通状態にある時ミューティング動作をな
すＮＰＮ型のミューティング用トランジスターと、その
エミッタが平滑用の第１コンデンサを介して電源に接続
されていると共にそのコレクタが前記ミューティング用
トランジスターのベースに接続され導通状態にある時前
記ミューティング用トランジスターを導通状態にせしめ
るＰＮＰ型の制御用トランジスターと、該制御用トラン
ジスターのベース側にアノードが接続されそのカソード
が第２コンデンサと抵抗とが並列接続された時定数回路
を介して接地された逆流防止用ダイオードと１．再生、
停止等の各種モード切換操作時に切換え操作され前記制
御用トランジスターのベースに印加していたカットオフ
電圧を一旦遮断するミューティング用スイッチ、と、該
ミューティング用スイッチの切換え操作時に前記制御用
トランジスターのベースを接地せしめる接地用の抵抗と
より成り、而して電源の投入、遮断時並びにモード切換
え操作時に前記制御用トランジスターを所定期間導通状
態にして、−前記ミューティング用トランジスターによ
るミューティング動作を行 ゛なわせるようにした事
を特徴とするテープレコーダーのミューティング回路。An NPN type muting transistor has a collector-emitter path connected between the signal transmission path and the ground, and performs a muting operation when in a conductive state, and its emitter is connected to the power supply via a first smoothing capacitor. a PNP type control transistor whose collector is connected to the base of the muting transistor and makes the muting transistor conductive when it is in a conductive state; and an anode on the base side of the control transistor. 1. is connected to a backflow prevention diode whose cathode is grounded via a time constant circuit in which a second capacitor and a resistor are connected in parallel; reproduction,
a muting switch that is operated to temporarily cut off the cut-off voltage applied to the base of the control transistor when switching various modes such as stop; It consists of a grounding resistor that grounds the base, and when the power is turned on or off or when the mode is switched, the control transistor is made conductive for a predetermined period, and the muting transistor performs a muting operation. A muting circuit for a tape recorder, which is characterized in that it can be made to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7445682U JPS58176209U (en) | 1982-05-20 | 1982-05-20 | Tape recorder muting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7445682U JPS58176209U (en) | 1982-05-20 | 1982-05-20 | Tape recorder muting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58176209U true JPS58176209U (en) | 1983-11-25 |
Family
ID=30083886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7445682U Pending JPS58176209U (en) | 1982-05-20 | 1982-05-20 | Tape recorder muting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58176209U (en) |
-
1982
- 1982-05-20 JP JP7445682U patent/JPS58176209U/en active Pending
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