JPH0246904U - - Google Patents
Info
- Publication number
- JPH0246904U JPH0246904U JP12426588U JP12426588U JPH0246904U JP H0246904 U JPH0246904 U JP H0246904U JP 12426588 U JP12426588 U JP 12426588U JP 12426588 U JP12426588 U JP 12426588U JP H0246904 U JPH0246904 U JP H0246904U
- Authority
- JP
- Japan
- Prior art keywords
- write
- differential amplification
- read coil
- magnetic recording
- amplification transistors
- 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
Links
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Digital Magnetic Recording (AREA)
- Amplifiers (AREA)
Description
第１図は本考案装置の回路構成図、第２図は他
の実施例における本考案装置の回路構成図、第３
図は従来技術の回路構成図、第４図は関連技術の
回路構成図である。
１２……書込み読取りコイル、１４……書込み
回路、２６，２８……差動増幅用トランジスタ、
４０……ブレークダウン防止ダイオード、Ｃ……
コモン、Ｖｃｃ……電源電圧、Ｒ７，Ｒ８……ク
ランプ抵抗、４２……スイツチングトランジスタ
。
Fig. 1 is a circuit diagram of the device of the present invention, Fig. 2 is a circuit diagram of the device of the present invention in another embodiment, and Fig. 3 is a circuit diagram of the device of the present invention in another embodiment.
The figure is a circuit configuration diagram of a conventional technique, and FIG. 4 is a circuit configuration diagram of a related technique. 12...Write/read coil, 14...Write circuit, 26, 28...Differential amplification transistor,
40...Breakdown prevention diode, C...
Common, Vcc...power supply voltage, R7 , R8 ...clamp resistance, 42...switching transistor.
Claims (1)
体からの情報の読取りを行う書込み読取りコイル
と、 この書込み読取りコイルの両端に接続され、書
込み時に所定の書込み用電流を供給する書込み回
路と、 上記書込み読取りコイルの両端に接続され、こ
の両端における電位変化を検出する再生回路と、
を含み、 前記再生回路は、 上記書込み読取りコイルの両端がそれぞれベー
スに接続され、上記書込み読取りコイルの両端の
電位変化に応じて電流量がそれぞれ変化する一対
の差動増幅用トランジスタと、この一対の差動増
幅用トランジスタに電流を供給する電源と、 上記一対の差動増幅用トランジスタの両者に流
れる電流量の和を一定量に規制する定電流手段と
、 上記一対の差動増幅用トランジスタのベース側
にそれぞれ接続されるクランプ抵抗と、前記両ク
ランプ抵抗とアース間とに接続され、再生時にＯ
Ｎ作動するスイツチングトランジスタと、を備え
、 上記差動増幅用トランジスタの入力の信号源イ
ンピーダンスを低減し、ノイズの発生を軽減した
ことを特徴とする磁気記録再生装置。[Claims for Utility Model Registration] A write/read coil that writes information to a magnetic recording medium and reads information from the magnetic recording medium; a reproducing circuit connected to both ends of the write/read coil and detecting potential changes at both ends;
The reproduction circuit includes: a pair of differential amplification transistors, each of which has a base connected to both ends of the write/read coil, and whose current amount changes depending on a change in the potential at both ends of the write/read coil; a power supply for supplying current to the differential amplification transistors; a constant current means for regulating the sum of the amount of current flowing through both of the pair of differential amplification transistors to a constant amount; A clamp resistor is connected to each base side, and is connected between both clamp resistors and ground, and the output voltage is
A magnetic recording and reproducing device comprising: a switching transistor that operates in an N state; and a signal source impedance at the input of the differential amplification transistor is reduced to reduce noise generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12426588U JPH0755682Y2 (en) | 1988-09-21 | 1988-09-21 | Magnetic recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12426588U JPH0755682Y2 (en) | 1988-09-21 | 1988-09-21 | Magnetic recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0246904U true JPH0246904U (en) | 1990-03-30 |
| JPH0755682Y2 JPH0755682Y2 (en) | 1995-12-20 |
Family
ID=31373849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12426588U Expired - Lifetime JPH0755682Y2 (en) | 1988-09-21 | 1988-09-21 | Magnetic recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755682Y2 (en) |
-
1988
- 1988-09-21 JP JP12426588U patent/JPH0755682Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0755682Y2 (en) | 1995-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SU1075997A3 (en) | Device for playing-back digital data from magnetic record carrier | |
| JPS59152511A (en) | Magnetic head circuit | |
| JP3516178B2 (en) | Preamplifier circuit device | |
| JPH0246904U (en) | ||
| US4792868A (en) | Recording/reproducing device with means for switching inductance of such device for use in a floppy disk apparatus | |
| JPH0226104U (en) | ||
| JPH02132304U (en) | ||
| JP2518906B2 (en) | Magnetic recording / reproducing device | |
| JPH07169003A (en) | Signal reproducing circuit for magneto-resistance effect type head | |
| JP2571604B2 (en) | Magnetic recording / reproducing device | |
| JP2732583B2 (en) | Crosstalk reduction device for magnetic recording / reproducing device | |
| JPH0755681Y2 (en) | Common power supply circuit for magnetic recording devices | |
| JP2621969B2 (en) | Write circuit | |
| JPH0325844B2 (en) | ||
| JP3099837B2 (en) | Magnetoresistive element signal switching amplifier circuit and magnetic storage device using the same | |
| JPS6125054Y2 (en) | ||
| JP2543942Y2 (en) | Magnetic recording / reproducing circuit | |
| JP2692404B2 (en) | Read circuit for magnetic head | |
| JPS6135468U (en) | clamp circuit | |
| JPH01152208U (en) | ||
| JPH06101087B2 (en) | Magnetic recording circuit | |
| JPS6052650U (en) | Magnetoelectric conversion circuit | |
| JPS6285903U (en) | ||
| JPH02132306U (en) | ||
| JPH06150209A (en) | Magnetic card reader with erasing function |