JPS60116606U

JPS60116606U - tape recorder

Info

Publication number: JPS60116606U
Application number: JP451884U
Authority: JP
Inventors: 良寿山本
Original assignee: 日本ビクター株式会社
Priority date: 1984-01-17
Filing date: 1984-01-17
Publication date: 1985-08-07
Also published as: JPH0355122Y2

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

[Brief explanation of the drawing]

・　　第１図は従来のテープレコーダ；の電気回路図を
示し、第２図はこの考案のテープレコーダの電気回路図
を示すものである。１・・・マイクロホン、２・・・ファンクションスイッ
チ、３・・・ファンクションスイッチ２の一方の固定接
点、４・・・同他方の固定接点、６・・・同可動接点、
５・・・外部入力端子、７・・・録音・再生スイッチ、
８・・・録音・再生スイッチ７の一方の固定接点、９・
・・同他方の固定接点、１１・・・同可動接点、１０・
・・再生ヘッド、１２・・・増幅器、１３・・・録音系
のライン、１４，２Ｌ　　２７・・・コンデンサ、１５
・・・第１の演算増幅回路、１６・・・第１の演算増幅
回路１５の一方の入力端子、１７・・・同他方の入力端
子、１　　８、　２０．　２’４・・・抵抗、１９・・
・第１の演算増幅回路１５の出力端子、２２・・・第２
の演算増幅回路、２３・・・第２の演算増幅回路２２の
他方の入力端子、２５・・・同出力端子、２６・・・同
一方の入力端子、２８・・・スピーカ、２９・・・ファ
ンクションスイッチ、３０・・・ファンクションスイッ
チ２９の可動接点、３１・・・同一方の固定接点、３５
・・・同他方の固定接点、３２・・・録音・再生スイッ
チ、３３・・・録音・再生スイッチｊ２の可動接点、３
４・・・同他方の固定接点、３６・・・同一方の固定接
点。- Fig. 1 shows an electric circuit diagram of a conventional tape recorder; Fig. 2 shows an electric circuit diagram of a tape recorder of this invention. DESCRIPTION OF SYMBOLS 1... Microphone, 2... Function switch, 3... One fixed contact of the same function switch 2, 4... The other fixed contact of the same, 6... The same movable contact,
5... External input terminal, 7... Recording/playback switch,
8... One fixed contact of the recording/playback switch 7, 9.
... Same other fixed contact, 11... Same movable contact, 10.
...Playback head, 12...Amplifier, 13...Recording line, 14, 2L 27...Capacitor, 15
. . . first operational amplifier circuit, 16 . . . one input terminal of the first operational amplifier circuit 15, 17 . . . the other input terminal of the same, 1 8, 20. 2'4...Resistance, 19...
- Output terminal of the first operational amplifier circuit 15, 22...second
operational amplifier circuit, 23...the other input terminal of the second operational amplifier circuit 22, 25...the same output terminal, 26...the same one input terminal, 28...the speaker, 29... Function switch, 30... Movable contact of function switch 29, 31... Fixed contact on the same side, 35
. . . Fixed contact of the other side, 32 . . . Recording/playback switch, 33 . . . Movable contact of recording/playback switch j2, 3
4... Same other fixed contact, 36... Same one fixed contact.

Claims

[Scope of utility model registration request]

(1) A first operational amplifier circuit in which a signal source is connected to one input terminal and a feedback element is connected between the other input terminal and the output terminal, and one input terminal is grounded and the other input terminal is connected to the feedback element. a second operational amplifier circuit, which is connected to the output terminal through the
an operational amplifier circuit, and a BTL connection amplifier circuit configured by connecting a speaker between the output terminals of these operational amplifier circuits; a tape recorder having a built-in microphone serving as the signal source, records the signal of the microphone; Only when one input terminal of the second operational amplifier circuit is disconnected from the ground connection and connected to the same signal source as one input terminal of the first operational amplifier circuit, only during playback or other than microphone signals. A tape recorder comprising changeover switch means for connecting one input terminal of the second operational amplifier circuit to ground when recording the signal.