JPH0210584Y2 - - Google Patents
Info
- Publication number
- JPH0210584Y2 JPH0210584Y2 JP3975081U JP3975081U JPH0210584Y2 JP H0210584 Y2 JPH0210584 Y2 JP H0210584Y2 JP 3975081 U JP3975081 U JP 3975081U JP 3975081 U JP3975081 U JP 3975081U JP H0210584 Y2 JPH0210584 Y2 JP H0210584Y2
- Authority
- JP
- Japan
- Prior art keywords
- equalizer
- characteristic
- tape
- amplifier
- time constant
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 19
- 239000002184 metal Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Description
【考案の詳細な説明】
この考案は、磁気テープの磁気特性に応じて磁
気テープ再生時のイコライザ特性を切り換えるよ
うにしたテープレコーダにおいて、磁気テープの
１つの記録部分とつぎの記録部分との間の無記録
部分の検出、すなわち曲間検出の検出感度が、イ
コライザ特性の切り換えに無関係に一定になるよ
うにしたテープレコーダに関する。[Detailed description of the invention] This invention is a tape recorder that switches the equalizer characteristics during magnetic tape playback according to the magnetic characteristics of the magnetic tape. The present invention relates to a tape recorder in which the detection sensitivity for detecting non-recorded portions, that is, detecting between songs, remains constant regardless of switching of equalizer characteristics.
従来、たとえば、ノーマルテープ、クロームテ
ープ、メタルテープなどの磁気特性の異なる磁気
テープそれぞれを再生するときには、各テープの
磁気特性に応じて周波数補正を行なう必要があ
り、従来のテープレコーダには、周波数補正を行
なうために、イコライザ増幅器およびイコライザ
増幅器のイコライザ特性を定める時定数素子が設
けられ、第１図に示すように、テープの磁気特性
やテープレコーダの種類などに応じてイコライザ
特性を定める時定数を変化し、イコライザ増幅器
のイコライザ特性を変化する。 Conventionally, when playing magnetic tapes with different magnetic properties such as normal tape, chrome tape, and metal tape, it was necessary to perform frequency correction according to the magnetic properties of each tape. In order to perform the correction, an equalizer amplifier and a time constant element that determines the equalizer characteristics of the equalizer amplifier are provided.As shown in Figure 1, the time constant that determines the equalizer characteristics according to the magnetic characteristics of the tape, the type of tape recorder, etc. and change the equalizer characteristics of the equalizer amplifier.
すなわち、同図において、実線ａ，ｂ，ｃ，ｄ
それぞれは、時定数120μS，90μS，70μS，50μS
のときの周波数に対する再生時の相対レベルを示
すとともに、μSはマイクロ秒の単位を示し、周
波数が高くなると、時定数120μS，90μS，70μS，
50μSの順に相対レベルが低くなり、時定数120μS
および70μSはカセツト式テープレコーダにノー
マルテープ、メタルテープを使用したときのイコ
ライザ特性であり、時定数90μSおよび50μSはオ
ープンリール式テープレコーダのイコライザ特性
である。 That is, in the same figure, solid lines a, b, c, d
The time constants are 120μS, 90μS, 70μS, 50μS, respectively.
In addition to indicating the relative level during playback with respect to the frequency when
The relative level decreases in the order of 50μS, and the time constant is 120μS.
and 70μS are equalizer characteristics when normal tape or metal tape is used in a cassette tape recorder, and time constants 90μS and 50μS are equalizer characteristics of a reel-to-reel tape recorder.
そして、たとえば、従来のカセツト式テープレ
コーダは、第２図に示すように、磁気テープの走
行により、再生用磁気ヘツド１から再生信号が出
力され、再生信号がイコライザ増幅器２に入力さ
れるとともに、イコライザ増幅器２の出力が次段
増幅器３に入力される。 For example, in a conventional cassette tape recorder, as shown in FIG. 2, as the magnetic tape runs, a reproduction signal is output from a reproduction magnetic head 1, and the reproduction signal is input to an equalizer amplifier 2. The output of the equalizer amplifier 2 is input to the next stage amplifier 3.
また、イコライザ増幅器２のイコライザ端子と
出力端子との間に、基本時定数素子であるイコラ
イザ特性補正用第１、第２抵抗R1，R2およびイ
コライザ特性補正用コンデンサＣが直列に接続さ
れ、第１、第２抵抗R1，R2およびコンデンサＣ
により、イコライザ増幅器２のイコライザ特性
を、たとえばノーマルテープの磁気特性に応じた
時定数120μSの基本イコライザ特性にする。 Further, first and second resistors R 1 and R 2 for equalizer characteristic correction, which are basic time constant elements, and a capacitor C for equalizer characteristic correction are connected in series between the equalizer terminal and the output terminal of the equalizer amplifier 2, First and second resistors R 1 , R 2 and capacitor C
As a result, the equalizer characteristics of the equalizer amplifier 2 are set to basic equalizer characteristics with a time constant of 120 μS, which corresponds to the magnetic characteristics of a normal tape, for example.
さらに、第２抵抗R2に並列に、時定数切り換
え手段である２接点形の切換スイツチ４と、副時
定数素子であるイコライザ特性補正用第３抵抗
R3との直列回路が設けられ、切換スイツチ４の
切り換えにより、第１接点端子４ａが可動片端子
４ｂに接続されると、第２抵抗R2に第３抵抗R3
が並列接続され、イコライザ増幅器２のイコライ
ザ特性を、クロームテープおよびメタルテープの
磁気特性に応じた時定数70μSのイコライザ特性
に変化させる。なお、４ｃは切換スイツチ４の第
２接点端子を示し、切り換えにより、第２接点端
子４ｃを可動片端子４ｂに接続すると、イコライ
ザ増幅回路２が基本イコライザ特性になる。 Further, in parallel with the second resistor R2 , a two-contact type changeover switch 4, which is a time constant switching means, and a third resistor for equalizer characteristic correction, which is a sub-time constant element, are connected.
A series circuit with R3 is provided, and when the first contact terminal 4a is connected to the movable piece terminal 4b by switching the changeover switch 4, the second resistor R2 is connected to the third resistor R3 .
are connected in parallel to change the equalizer characteristic of the equalizer amplifier 2 to an equalizer characteristic with a time constant of 70 μS that corresponds to the magnetic characteristics of the chrome tape and the metal tape. Note that 4c indicates the second contact terminal of the changeover switch 4, and when the second contact terminal 4c is connected to the movable piece terminal 4b by switching, the equalizer amplifier circuit 2 has basic equalizer characteristics.
一方、磁気テープの連続して記録された１つの
記録部分、すなわち音楽などの１曲分が記録され
た部分と、つぎの記録部分、すなわちつぎの１曲
分が記録された部分との間の無記録部分、すなわ
ち曲間を検出するときには、磁気テープを再生時
のテープの速度と比して10〜30倍のテープ速度で
走行させるとともに、イコライザ増幅器２の出力
を曲間検出回路５に入力し、曲間検出回路５の出
力によりソレノイド制御回路６を介してソレノイ
ド７を駆動する。なお、８は電源端子であり、曲
間検出回路５およびソレノイド７に駆動電圧を印
加する。また９は電源端子８と曲間検出回路５と
の間に設けられた曲間検出回路５の駆動スイツチ
である。 On the other hand, the difference between one recorded part of a magnetic tape that is recorded continuously, that is, the part where one song of music etc. is recorded, and the next recorded part, that is, the part where the next one song is recorded. When detecting a non-recorded portion, that is, a song interval, the magnetic tape is run at a tape speed that is 10 to 30 times the tape speed during playback, and the output of the equalizer amplifier 2 is input to the song gap detection circuit 5. Then, the solenoid 7 is driven by the output of the song interval detection circuit 5 via the solenoid control circuit 6. Note that 8 is a power supply terminal, which applies a driving voltage to the song interval detection circuit 5 and the solenoid 7. Reference numeral 9 denotes a drive switch for the song interval detection circuit 5, which is provided between the power supply terminal 8 and the song interval detection circuit 5.
そして、曲間検出回路５の検出特性は、テープ
レコーダの機構部および磁気ヘツド１の特性を考
慮し、再生時に再生信号の100Hz〜数ＫHzの成分
が−35dB以下の信号レベルになるような所定時
定数のイコライザ特性、たとえば、時定数120μS
のノーマルテープに応じたイコライザ特性、すな
わち基本イコライザ特性となるように設定されて
いる。 The detection characteristics of the song interval detection circuit 5 are determined by taking into consideration the characteristics of the mechanical part of the tape recorder and the magnetic head 1, and are set at a predetermined level such that the components of the playback signal from 100 Hz to several KHz during playback have a signal level of -35 dB or less. Equalizer characteristics of time constant, for example, time constant 120μS
The equalizer characteristics are set to correspond to the normal tape, that is, the basic equalizer characteristics.
したがつて、クロームテープやメタルテープな
どの再生時に、切換スイツチ４を切り換え、第２
抵抗R2に第３抵抗R3を並設し、イコライザ増幅
器２のイコライザ特性を時定数70μSのイコライ
ザ特性にした際、曲間を検出するために、磁気テ
ープを高速走行させるとともに、イコライザ増幅
器２の出力を曲間検出回路５に入力すると、再生
時の300Hz〜1KHzの再生信号が10KHz付近の信号
として入力され、第１図に示すように時定数
120μSおよび70μSの300Hz〜1KHzのイコライザ特
性がほぼ等しいにもかかわらず、10KHz付近のイ
コライザ特性が異なるため、曲間検出回路５の検
出感度に差が生じる欠点がある。 Therefore, when playing back chrome tapes, metal tapes, etc., changeover switch 4 is switched and the second
When a third resistor R 3 is installed in parallel with the resistor R 2 and the equalizer characteristic of the equalizer amplifier 2 is set to an equalizer characteristic with a time constant of 70 μS, the magnetic tape is run at high speed and the equalizer amplifier 2 is When the output is input to the song interval detection circuit 5, the playback signal of 300Hz to 1KHz during playback is input as a signal around 10KHz, and the time constant is changed as shown in Figure 1.
Although the equalizer characteristics of 300Hz to 1KHz for 120μS and 70μS are almost the same, the equalizer characteristics around 10KHz are different, so there is a drawback that the detection sensitivity of the inter-song detection circuit 5 differs.
この考案は、前記の点に留意してなされたもの
であり、つぎにこの考案を、その１実施例を示し
た第３図とともに詳細に説明する。 This invention has been made with the above-mentioned points in mind, and next, this invention will be explained in detail with reference to FIG. 3 showing one embodiment thereof.
同図において、第２図と同一記号は同一のもの
を示し、第２図と異なる点は、第２抵抗R2とコ
ンデンサＣの接続点と、第３抵抗R3との間に、
イコライザ特性固定スイツチ１０を設けるととも
に、駆動スイツチ９とイコライザ特性固定スイツ
チ１０とを連動させ、駆動スイツチ９の閉路時
に、イコライザ特性固定スイツチ１０が開路する
ようにした点である。 In the same figure, the same symbols as in FIG. 2 indicate the same things, and the difference from FIG. 2 is that there is a
The equalizer characteristic fixing switch 10 is provided, and the drive switch 9 and the equalizer characteristic fixing switch 10 are interlocked so that when the drive switch 9 is closed, the equalizer characteristic fixing switch 10 is opened.
したがつて、クロームテープやメタルテープの
再生時に、切換スイツチ４を切り換え、第２抵抗
R2に第３抵抗R3を並設し、イコライザ増幅器２
のイコライザ特性を時定数70μSのイコライザ特
性にした際にも、曲間を検出するときに曲間検出
回路５の駆動スイツチ９を閉路すると、駆動スイ
ツチ９に連動してイコライザ特性固定スイツチ１
０が開路し、イコライザ増幅器２のイコライザ特
性が、第１、第２抵抗R1，R2およびコンデンサ
Ｃで定まる時定数120μSのノーマルテープのイコ
ライザ特性、すなわち基本イコライザ特性に自動
的に切り換わり、曲間を検出する際には、切換ス
イツチ４の切り換えに無関係に、イコライザ増幅
器２のイコライザ特性が基本イコライザ特性にな
り、曲間検出回路５の検出感度が、磁気テープの
磁気特性に無関係に一定になる。 Therefore, when playing chrome tape or metal tape, changeover switch 4 is switched and the second resistor is
A third resistor R3 is installed in parallel to R2 , and the equalizer amplifier 2
Even when the equalizer characteristic is set to an equalizer characteristic with a time constant of 70 μS, if the drive switch 9 of the song interval detection circuit 5 is closed when detecting a song gap, the equalizer characteristic fixing switch 1 will be activated in conjunction with the drive switch 9.
0 is opened, and the equalizer characteristics of the equalizer amplifier 2 are automatically switched to the normal tape equalizer characteristics with a time constant of 120 μS determined by the first and second resistors R 1 and R 2 and the capacitor C, that is, the basic equalizer characteristics, When detecting a song interval, the equalizer characteristic of the equalizer amplifier 2 becomes the basic equalizer characteristic regardless of the switching of the changeover switch 4, and the detection sensitivity of the song interval detection circuit 5 remains constant regardless of the magnetic characteristics of the magnetic tape. become.
なお、前記実施例では時定数120μSのイコライ
ザ特性を基本イコライザ特性としたが、他の時定
数のイコライザ特性を基本イコライザ特性にする
ことは勿論可能である。 In the above embodiment, the equalizer characteristic with a time constant of 120 μS was used as the basic equalizer characteristic, but it is of course possible to use the equalizer characteristic with other time constants as the basic equalizer characteristic.
以上のように、この考案のテープレコーダによ
ると、検出回路の駆動スイツチと、時定数切り換
え手段の動作に無関係にイコライザ増幅器のイコ
ライザ特性を基本時定数素子による基本イコライ
ザ特性にするイコライザ特性固定スイツチとを設
け、駆動スイツチとイコライザ特性固定スイツチ
とを連動させることにより、磁気テープの１つの
記録部分とつぎの記録部分との間の無記録部分の
検出、すなわち曲間検出の検出感度が、イコライ
ザ特性の切り換えに無関係に一定になるものであ
る。 As described above, the tape recorder of this invention includes a drive switch for the detection circuit, an equalizer characteristic fixed switch that sets the equalizer characteristic of the equalizer amplifier to the basic equalizer characteristic by the basic time constant element, regardless of the operation of the time constant switching means. By providing a drive switch and an equalizer characteristic fixing switch in conjunction with each other, the detection sensitivity for detecting a non-recorded part between one recorded part of a magnetic tape and the next recorded part, that is, detecting between songs, can be adjusted according to the equalizer characteristic. It remains constant regardless of switching.
第１図は時定数の異なるイコライザ特性の曲線
図、第２図は従来のテープレコーダの一部のブロ
ツク図、第３図はこの考案のテープレコーダの一
部のブロツク図である。
２……イコライザ増幅器、４……切換スイツ
チ、５……曲間検出回路、９……駆動スイツチ、
１０……イコライザ特性固定スイツチ、Ｃ……イ
コライザ補正用コンデンサ、R1，R2，R3……イ
コライザ補正用第１、第２、第３抵抗。
FIG. 1 is a curve diagram of equalizer characteristics with different time constants, FIG. 2 is a block diagram of a portion of a conventional tape recorder, and FIG. 3 is a block diagram of a portion of the tape recorder of this invention. 2... Equalizer amplifier, 4... Changeover switch, 5... Song interval detection circuit, 9... Drive switch,
10...Equalizer characteristic fixed switch, C...Equalizer correction capacitor, R1 , R2 , R3 ...First, second, and third resistors for equalizer correction.
Claims (1)
イザ増幅器と、該イコライザ増幅器のイコライザ
特性を所定の基本イコライザ特性にする基本時定
数素子と、磁気テープの磁気特性に応じて前記基
本時定数素子に副時定数素子を接続し前記イコラ
イザ特性を変化させる時定数切り換え手段とを備
え、かつ、磁気テープを高速走行させるとともに
前記イコライザ増幅器の出力を検出回路に入力
し、磁気テープの連続して記録された１つの記録
部分とつぎの記録部分との間の無記録部分を検出
するテープレコーダにおいて、前記検出回路の駆
動スイツチと、前記時定数切り換え手段の動作に
無関係に前記イコライザ増幅器のイコライザ特性
を前記基本時定数素子による基本イコライザ特性
にするイコライザ特性固定スイツチとを設け、前
記駆動スイツチと前記イコライザ特性固定スイツ
チとを連動させたテープレコーダ。 an equalizer amplifier to which a reproduced signal from a magnetic tape is input; a basic time constant element that sets the equalizer characteristic of the equalizer amplifier to a predetermined basic equalizer characteristic; and a time constant switching means for connecting a constant element to change the equalizer characteristics, and running the magnetic tape at high speed and inputting the output of the equalizer amplifier to a detection circuit, so as to continuously record one part of the magnetic tape. In a tape recorder that detects a non-recorded portion between one recorded portion and the next recorded portion, the equalizer characteristic of the equalizer amplifier is set to the basic time regardless of the operation of the drive switch of the detection circuit and the time constant switching means. 1. A tape recorder comprising an equalizer characteristic fixing switch that sets a basic equalizer characteristic using a constant element, and in which the drive switch and the equalizer characteristic fixing switch are interlocked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3975081U JPH0210584Y2 (en) | 1981-03-20 | 1981-03-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3975081U JPH0210584Y2 (en) | 1981-03-20 | 1981-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57152629U JPS57152629U (en) | 1982-09-25 |
| JPH0210584Y2 true JPH0210584Y2 (en) | 1990-03-15 |
Family
ID=29836872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3975081U Expired JPH0210584Y2 (en) | 1981-03-20 | 1981-03-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210584Y2 (en) |
-
1981
- 1981-03-20 JP JP3975081U patent/JPH0210584Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57152629U (en) | 1982-09-25 |
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