JPS6148411U - - Google Patents

Info

Publication number
JPS6148411U
JPS6148411U JP13286184U JP13286184U JPS6148411U JP S6148411 U JPS6148411 U JP S6148411U JP 13286184 U JP13286184 U JP 13286184U JP 13286184 U JP13286184 U JP 13286184U JP S6148411 U JPS6148411 U JP S6148411U
Authority
JP
Japan
Prior art keywords
tape
bias current
oscillation circuit
base
transistor
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.)
Granted
Application number
JP13286184U
Other languages
Japanese (ja)
Other versions
JPH0319049Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1984132861U priority Critical patent/JPH0319049Y2/ja
Publication of JPS6148411U publication Critical patent/JPS6148411U/ja
Application granted granted Critical
Publication of JPH0319049Y2 publication Critical patent/JPH0319049Y2/ja
Expired legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示す回路図、及び
第２図は従来のバイアス電流切換え装置を示す回
路図である。 主な図番の説明、１９…テープセレクタ回路、
２４，２５，２６…出力端子、２７，２８，３０
…抵抗、２９…トランジスタ、３１…発振回路。 FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional bias current switching device. Explanation of main figure numbers, 19 ...Tape selector circuit,
24, 25, 26...output terminal, 27, 28, 30
...Resistor, 29...Transistor, 31...Oscillation circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 磁気テープの種類に対応したバイアス電流を録
音信号に重畳して該磁気テープに録音する為のテ
ープレコーダにおいて、前記バイアス電流を発生
する発振回路と、磁気テープの種類に対応して「
Ｈ」信号を発生せる出力端子が切換わるテープセ
レクタ回路と、一端が該テープセレクタ回路のノ
ーマルテープの使用時に「Ｈ」信号を発生する出
力端子以外の出力端子のそれぞれに接続され、該
出力端子から出力される信号を制限する抵抗と、
コレクタが前記抵抗の他端に、コミツタが前記発
振回路に接続され、テープレコーダの録音操作が
行われた時にオンするＮＰＮ型のトランジスタと
、該トランジスタのベースに接続され、該ベース
に流れ込む電流を制限する抵抗とから成り、ノー
マルテーブルの使用時においては前記トランジス
タのベースから流れ込む電流のみを使用して前記
発振回路からバイアス電流を発生させ、ノーマル
テープ以外の磁気テープの使用時においてに前記
トランジスタのベース及びコレクレから流れ込む
電流を使用して前記発振回路からバイアス電流を
発生させることを特徴とするテープレコーダのバ
イアス電流切換え装置。 In a tape recorder for recording onto a magnetic tape by superimposing a bias current corresponding to the type of magnetic tape on a recording signal, an oscillation circuit that generates the bias current and an oscillation circuit corresponding to the type of magnetic tape are provided.
A tape selector circuit in which an output terminal that generates an "H" signal is switched, and one end of which is connected to each of the output terminals of the tape selector circuit other than the output terminal that generates an "H" signal when a normal tape is used, and the output terminal a resistor that limits the signal output from the
A collector is connected to the other end of the resistor, a committer is connected to the oscillation circuit, and an NPN transistor is connected to the base of the transistor, which is turned on when the tape recorder is recording, and the current flowing into the base is connected to the collector. When a normal table is used, only the current flowing from the base of the transistor is used to generate a bias current from the oscillation circuit, and when a magnetic tape other than a normal tape is used, the bias current is generated from the transistor. A bias current switching device for a tape recorder, characterized in that a bias current is generated from the oscillation circuit using a current flowing from a base and a collector.
JP1984132861U 1984-08-31 1984-08-31 Expired JPH0319049Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1984132861U JPH0319049Y2 (en) 1984-08-31 1984-08-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984132861U JPH0319049Y2 (en) 1984-08-31 1984-08-31

Publications (2)

Publication Number Publication Date
JPS6148411U true JPS6148411U (en) 1986-04-01
JPH0319049Y2 JPH0319049Y2 (en) 1991-04-23

Family

ID=30691418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1984132861U Expired JPH0319049Y2 (en) 1984-08-31 1984-08-31

Country Status (1)

Country Link
JP (1) JPH0319049Y2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55178824U (en) * 1979-06-11 1980-12-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55178824U (en) * 1979-06-11 1980-12-22

Also Published As

Publication number Publication date
JPH0319049Y2 (en) 1991-04-23

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