JPH0276364U - - Google Patents
Info
- Publication number
- JPH0276364U JPH0276364U JP15540888U JP15540888U JPH0276364U JP H0276364 U JPH0276364 U JP H0276364U JP 15540888 U JP15540888 U JP 15540888U JP 15540888 U JP15540888 U JP 15540888U JP H0276364 U JPH0276364 U JP H0276364U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- control
- amplifier
- comparator
- recording
- 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
- 230000003321 amplification Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図は本考案になる記録再生装置の読み出し
電圧調整回路の一実施例を示す図、第２図は本考
案回路を構成する電圧制御増幅器の特性を示す図
、第３図は第１図中の波形を示す図、第４図は従
来の読み出し電圧調整回路の一例を示す図である
。
１１……読み出しヘツド、１２……電圧制御増
幅器ＶＣＡ、１３……コンパレータ、１４……８
ビツトカウンタ、１５……デジタル・アナログ（
Ｄ／Ａ）変換器、１６……マイクロコンピユータ
。
FIG. 1 is a diagram showing an embodiment of the readout voltage adjustment circuit of the recording/reproducing apparatus according to the present invention, FIG. 2 is a diagram showing the characteristics of the voltage control amplifier constituting the circuit of the present invention, and FIG. 3 is a diagram similar to the one shown in FIG. FIG. 4 is a diagram showing an example of a conventional read voltage adjustment circuit. 11...Reading head, 12...Voltage control amplifier VCA, 13...Comparator, 14...8
Bit counter, 15...Digital/analog (
D/A) converter, 16...microcomputer.
Claims (1)
し、かつ供給される制御電圧の増加に応じて増幅
度が減少するように可変される電圧制御増幅器と
、 この電圧制御増幅器の出力電圧と目標調整電圧
とを比較するコンパレータと、 このコンパレータの比較出力によりカウントア
ツプされるカウンタと、 このカウンタから出力されるカウントアツプ値
をデジタル・アナログ変換して前記電圧制御増幅
器へ制御電圧として供給するデジタル・アナログ
変換器と よりなることを特徴とする記録再生装置の読み出
し電圧調整回路。[Claims for Utility Model Registration] A voltage control amplifier that amplifies a voltage read out in a recording/reproducing device and whose amplification degree is varied so as to decrease as a supplied control voltage increases; A comparator that compares the output voltage of the amplifier with a target adjustment voltage, a counter that counts up based on the comparison output of this comparator, and a digital-to-analog conversion of the count-up value output from this counter to control the voltage control amplifier. A read voltage adjustment circuit for a recording/reproducing device, comprising a digital-to-analog converter that supplies voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15540888U JPH0276364U (en) | 1988-11-29 | 1988-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15540888U JPH0276364U (en) | 1988-11-29 | 1988-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0276364U true JPH0276364U (en) | 1990-06-12 |
Family
ID=31433012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15540888U Pending JPH0276364U (en) | 1988-11-29 | 1988-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0276364U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524217A (en) * | 1975-06-20 | 1977-01-13 | Hitachi Ltd | Automatic gain adjust play back unit |
| JPS63155408A (en) * | 1986-12-19 | 1988-06-28 | Nec Corp | Magnetic disk device |
-
1988
- 1988-11-29 JP JP15540888U patent/JPH0276364U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524217A (en) * | 1975-06-20 | 1977-01-13 | Hitachi Ltd | Automatic gain adjust play back unit |
| JPS63155408A (en) * | 1986-12-19 | 1988-06-28 | Nec Corp | Magnetic disk device |
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