JPS5856317U - Tape recorder bias current supply circuit - Google Patents

Tape recorder bias current supply circuit

Info

Publication number
JPS5856317U
JPS5856317U JP15077881U JP15077881U JPS5856317U JP S5856317 U JPS5856317 U JP S5856317U JP 15077881 U JP15077881 U JP 15077881U JP 15077881 U JP15077881 U JP 15077881U JP S5856317 U JPS5856317 U JP S5856317U
Authority
JP
Japan
Prior art keywords
supply circuit
current supply
voltage
control voltage
bias
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
JP15077881U
Other languages
Japanese (ja)
Inventor
富弘 小口
Original Assignee
パイオニア株式会社
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 パイオニア株式会社 filed Critical パイオニア株式会社
Priority to JP15077881U priority Critical patent/JPS5856317U/en
Publication of JPS5856317U publication Critical patent/JPS5856317U/en
Pending legal-status Critical Current

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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 the drawing]

第1図はバイアス電流供給回路の従来例を示す回路図、
第2図ぼ本考案のバイアス電流供給回路の実施例を示す
回路である。 主要部分の符号の説明、1・・・バイアス発振器、2・
・・消去ヘッド、3・・・録音ヘッド、4・・・出力レ
ベル可変発振器、5・・・帯域通過形増幅器、6・・・
整流回路、7・・・電圧比較増幅器。
Figure 1 is a circuit diagram showing a conventional example of a bias current supply circuit.
FIG. 2 is a circuit showing an embodiment of the bias current supply circuit of the present invention. Explanation of symbols of main parts, 1...Bias oscillator, 2.
... Erasing head, 3... Recording head, 4... Variable output level oscillator, 5... Band pass amplifier, 6...
Rectifier circuit, 7...voltage comparison amplifier.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] (1)消去ヘッドと交流的に接続された録音へツーに流
れる電流に応じた電圧を生ずる電流検出手段と、前記電
流検出手段の出力信号の所定周波数帯域成分のみを通過
させるフィルタ手段と、−前記フィルタ手段の出力電圧
と所定電圧とを比較して制御電圧を発生する制御電圧発
生手段と、前記制御電圧レベルに応じて発振出力レベル
が変化するバイアス発振手段とからなることを特徴とす
るバイアス電流供給回路。
(1) current detection means that generates a voltage according to the current flowing to the recording medium connected to the erasing head in an alternating current manner, and filter means that passes only a predetermined frequency band component of the output signal of the current detection means; A bias comprising control voltage generating means for generating a control voltage by comparing the output voltage of the filter means with a predetermined voltage, and bias oscillation means for changing an oscillation output level according to the control voltage level. Current supply circuit.
(2)前記制御電圧発生手段は前記フィルタ手段の出力
電圧を整流する整流回路を有することを特徴とする実用
新案登録請求の範囲第1項記載のバイアス電流隼給回路
(2) The bias current supply circuit according to claim 1, wherein the control voltage generating means includes a rectifier circuit for rectifying the output voltage of the filter means.
JP15077881U 1981-10-09 1981-10-09 Tape recorder bias current supply circuit Pending JPS5856317U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15077881U JPS5856317U (en) 1981-10-09 1981-10-09 Tape recorder bias current supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15077881U JPS5856317U (en) 1981-10-09 1981-10-09 Tape recorder bias current supply circuit

Publications (1)

Publication Number Publication Date
JPS5856317U true JPS5856317U (en) 1983-04-16

Family

ID=29943491

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15077881U Pending JPS5856317U (en) 1981-10-09 1981-10-09 Tape recorder bias current supply circuit

Country Status (1)

Country Link
JP (1) JPS5856317U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62141132U (en) * 1986-02-28 1987-09-05
JPS62156728U (en) * 1986-03-26 1987-10-05
JPH01163745U (en) * 1988-05-06 1989-11-15

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62141132U (en) * 1986-02-28 1987-09-05
JPS62156728U (en) * 1986-03-26 1987-10-05
JPH01163745U (en) * 1988-05-06 1989-11-15

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