JPS6157334U - - Google Patents
Info
- Publication number
- JPS6157334U JPS6157334U JP14329984U JP14329984U JPS6157334U JP S6157334 U JPS6157334 U JP S6157334U JP 14329984 U JP14329984 U JP 14329984U JP 14329984 U JP14329984 U JP 14329984U JP S6157334 U JPS6157334 U JP S6157334U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- measuring device
- tape
- frequency
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000001934 delay Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図はこの考案に係るテープレコーダの回転
むら測定装置の一実施例を示すブロツク回路構成
図、第２図は同実施例の動作を示す特性曲線図、
第３図は従来の回転むら測定手段における問題点
を説明するための特性曲線図である。
１１……入力端子、１２……前置増幅器、１３
……バツフア回路、１４……交流−直流変換回路
、１５……時定数回路、１６……比較器、１７…
…回転むら測定器。
FIG. 1 is a block circuit configuration diagram showing an embodiment of a rotational unevenness measuring device for a tape recorder according to this invention, and FIG. 2 is a characteristic curve diagram showing the operation of the same embodiment.
FIG. 3 is a characteristic curve diagram for explaining problems in the conventional rotational unevenness measuring means. 11...Input terminal, 12...Preamplifier, 13
... Buffer circuit, 14 ... AC-DC conversion circuit, 15 ... Time constant circuit, 16 ... Comparator, 17 ...
...Rotation unevenness measuring device.
Claims (1)
再生信号をその周波数変動成分を測定する測定器
に供給することにより回転むらを測定するテープ
レコーダの回転むら測定装置において、前記再生
信号の周波数成分を直流電圧信号に変換する変換
回路と、この変換回路から出力された直流電圧信
号を所定時間遅延させる時定数回路と、この時定
数回路からの出力電圧レベルを基準電圧レベルと
比較し前記再生信号の周波数が前記テープ定速走
行時の周波数帯域内にはいつたか否かを検出する
比較回路と、この比較回路の検出信号に基づいて
前記測定器への前記再生信号の供給を許容及び阻
止する制御回路とを具備してなることを特徴とす
るテープレコーダの回転むら測定装置。 A rotational unevenness measuring device for a tape recorder that measures rotational unevenness by reproducing a tape on which a reference frequency signal is recorded and supplying the reproduced signal to a measuring device that measures its frequency fluctuation component. A conversion circuit that converts the DC voltage signal into a DC voltage signal, a time constant circuit that delays the DC voltage signal output from the conversion circuit for a predetermined period of time, and a voltage level output from the time constant circuit that compares the output voltage level with a reference voltage level to determine the level of the reproduced signal. a comparison circuit for detecting whether the frequency falls within the frequency band when the tape is running at constant speed; and a control for allowing or blocking the supply of the playback signal to the measuring device based on the detection signal of the comparison circuit. A rotational unevenness measuring device for a tape recorder, comprising a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14329984U JPS6157334U (en) | 1984-09-21 | 1984-09-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14329984U JPS6157334U (en) | 1984-09-21 | 1984-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6157334U true JPS6157334U (en) | 1986-04-17 |
Family
ID=30701598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14329984U Pending JPS6157334U (en) | 1984-09-21 | 1984-09-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6157334U (en) |
-
1984
- 1984-09-21 JP JP14329984U patent/JPS6157334U/ja active Pending
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