JPS58101309U - Recording/reproducing head switching circuit - Google Patents

Recording/reproducing head switching circuit

Info

Publication number
JPS58101309U
JPS58101309U JP19339981U JP19339981U JPS58101309U JP S58101309 U JPS58101309 U JP S58101309U JP 19339981 U JP19339981 U JP 19339981U JP 19339981 U JP19339981 U JP 19339981U JP S58101309 U JPS58101309 U JP S58101309U
Authority
JP
Japan
Prior art keywords
recording
switching circuit
reproducing head
head
head switching
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
Application number
JP19339981U
Other languages
Japanese (ja)
Inventor
平塚　幸雄
Original Assignee
ソニー株式会社
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 by ソニー株式会社 filed Critical ソニー株式会社
Priority to JP19339981U priority Critical patent/JPS58101309U/en
Publication of JPS58101309U publication Critical patent/JPS58101309U/en
Pending legal-status Critical Current

Links

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

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

第１図は従来の記鋒再生兼用ヘッドの切換回路を示す回
路図、第２図は本考案の一実施例を示す回路図、第３図
乃至第６図は本考案の他の実施例の一部を示す回路図で
ある。 Ｈは記録再生兼用ヘッド、Ａ（ＰＢ）は再生アン／、Ａ
（ＲＥＣ）は記録アンプ、Ｏ８Ｃは交流バイアス用発振
器、Ｑ□乃至Ｑ６はトランジスタ、ＴＲＰは交流バイア
ストラップ回路、Ｒ□乃至Ｒ□□は抵抗器である。Fig. 1 is a circuit diagram showing a switching circuit of a conventional recording/reproducing head, Fig. 2 is a circuit diagram showing one embodiment of the present invention, and Figs. 3 to 6 are circuit diagrams showing other embodiments of the present invention. It is a circuit diagram showing a part. H is a recording/reproducing head, A (PB) is a reproduction ann/, A
(REC) is a recording amplifier, O8C is an AC bias oscillator, Q□ to Q6 are transistors, TRP is an AC bias trap circuit, and R□ to R□□ are resistors.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 記録再生兼用ヘッドの一端が再生アンプめ入力側に接続
され、他端が交流バイアス用発振器に接続されると共に
、定電流用抵抗器を通じて記録アンプの出力側に接続さ
れ、記録時にオンとなるトランジスタロ工が上記ヘッド
の一端と接地との間に接続され、非記録時にオンとなり
互いに逆方向に直列接続されたトランジスタＱ２．　Ｑ
３が上記ヘッドの他端と接地との間に接続され、非記録
時にオンとなるトランジスタＱ４が定電流用抵抗器の中
点と接地との間に接続されて成る記録再生兼用ヘッドの
切換回路。One end of the recording/reproduction head is connected to the input side of the reproduction amplifier, and the other end is connected to an AC bias oscillator, and is also connected to the output side of the recording amplifier through a constant current resistor, and is a transistor that is turned on during recording. Transistors Q2 and Q2 are connected between one end of the head and ground, and are turned on during non-recording and are connected in series in opposite directions. Q
3 is connected between the other end of the head and the ground, and a switching circuit for the recording/reproducing head is formed by connecting a transistor Q4, which is turned on during non-recording, between the midpoint of the constant current resistor and the ground. .
JP19339981U 1981-12-28 1981-12-28 Recording/reproducing head switching circuit Pending JPS58101309U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19339981U JPS58101309U (en) 1981-12-28 1981-12-28 Recording/reproducing head switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19339981U JPS58101309U (en) 1981-12-28 1981-12-28 Recording/reproducing head switching circuit

Publications (1)

Publication Number Publication Date
JPS58101309U true JPS58101309U (en) 1983-07-09

Family

ID=30106754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19339981U Pending JPS58101309U (en) 1981-12-28 1981-12-28 Recording/reproducing head switching circuit

Country Status (1)

Country Link
JP (1) JPS58101309U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6347404U (en) * 1986-09-10 1988-03-31

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511630B1 (en) * 1971-06-02 1980-03-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511630B1 (en) * 1971-06-02 1980-03-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6347404U (en) * 1986-09-10 1988-03-31

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