JPS5856317U - Tape recorder bias current supply circuit - Google Patents
Tape recorder bias current supply circuitInfo
- 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
Links
Landscapes
- Amplifiers (AREA)
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)
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.
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.
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)
| 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 |
-
1981
- 1981-10-09 JP JP15077881U patent/JPS5856317U/en active Pending
Cited By (3)
| 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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