JPS58140593U - Monitor circuit for audio or video tape recorders, etc. - Google Patents
Monitor circuit for audio or video tape recorders, etc.Info
- Publication number
- JPS58140593U JPS58140593U JP3480382U JP3480382U JPS58140593U JP S58140593 U JPS58140593 U JP S58140593U JP 3480382 U JP3480382 U JP 3480382U JP 3480382 U JP3480382 U JP 3480382U JP S58140593 U JPS58140593 U JP S58140593U
- Authority
- JP
- Japan
- Prior art keywords
- audio
- video tape
- muting
- power
- power amplifier
- 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
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はオーディオあるいはビデオテープレコーダの従
来のモニタ回路図、第２図は他の従来例を示すモニタ回
路図、第３図はこの考案のオーディオあるいはビデオテ
ープレコーダのモニタ回路の一実施例を示す図、第４図
はこの考案の他の実施例を示すモニタ回路図である。
２・・・スピーカ、３・・・ヘッドホンジャック、５・
・・パワーＩＣ，Ｓｌ・・・ヘッドホンジャックと連動
するスイッチ、Ｔｒ・・・ミューティングトランジスタ
、Ｒ，、Ｒ２・・・抵抗。Fig. 1 is a conventional monitor circuit diagram for an audio or video tape recorder, Fig. 2 is a monitor circuit diagram showing another conventional example, and Fig. 3 is an embodiment of the monitor circuit for an audio or video tape recorder according to the present invention. The figure shown in FIG. 4 is a monitor circuit diagram showing another embodiment of this invention. 2...Speaker, 3...Headphone jack, 5.
... Power IC, Sl... Switch linked with headphone jack, Tr... Muting transistor, R,, R2... Resistor.
Claims (3)
出力をヘッドホンジャックと連動するスイッチを介して
スピーカに供給するようにしたオーディオあるいはビデ
オテープレコーダにおいて、録音時には制御信号によっ
てパワーアンプの信号ラインをミューティングし、この
状態でヘッドホンを使用した場合には、上記スイッチと
スピーカを通じて制御信号の印加される端子を側路して
ミューティングを解除し、同一パワー回路によってヘッ
ドホンを用いた録音モニタが可能なように構成したオー
ディオあるいはビデオテープレコーダなどのモニタ回路
。(1) In an audio or video tape recorder that uses a built-in microphone and supplies the output of the power amplifier to the speaker via a switch linked to the headphone jack, the signal line of the power amplifier is muted by a control signal during recording. If headphones are used in this state, muting is canceled by bypassing the terminal to which the control signal is applied through the switch and the speaker, and recording monitoring using the headphones is possible using the same power circuit. A monitor circuit such as an audio or video tape recorder configured as shown in FIG.
手段として、ミューティングトランジスタを用い、録音
時には制御信号をミューティングトランジスタのベース
に印加して、このミューティングトランジスタのコレク
タとエミッタを介してパワーアンプの入力信号をミュー
ティングするようにした実用新案登録請求の範囲第１項
に記載のオーディオあるいはビデオテープレコーダなど
のモニタ回路。(2) A muting transistor is used as a means for muting the signal line of the power amplifier. During recording, a control signal is applied to the base of the muting transistor, and the signal line of the power amplifier is transmitted through the collector and emitter of the muting transistor. A monitor circuit for an audio or video tape recorder or the like according to claim 1, which mutes an input signal.
は制御信号をパワーＩＣのミューティング端子に印加し
てパワーＩＣの出力を生じないようにした実用新案登録
請求の範囲第１項に記載のオーディオあるいはビデオテ
ープレコーダなどのモニタ回路。(3) The audio system according to claim 1, which uses a power IC as a power amplifier and applies a control signal to the muting terminal of the power IC during recording so that no output is generated from the power IC. Monitor circuits for video tape recorders, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3480382U JPS58140593U (en) | 1982-03-12 | 1982-03-12 | Monitor circuit for audio or video tape recorders, etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3480382U JPS58140593U (en) | 1982-03-12 | 1982-03-12 | Monitor circuit for audio or video tape recorders, etc. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58140593U true JPS58140593U (en) | 1983-09-21 |
Family
ID=30046295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3480382U Pending JPS58140593U (en) | 1982-03-12 | 1982-03-12 | Monitor circuit for audio or video tape recorders, etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58140593U (en) |
-
1982
- 1982-03-12 JP JP3480382U patent/JPS58140593U/en active Pending
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