JPS5954060A - Auto-stop circuit - Google Patents

Auto-stop circuit

Info

Publication number
JPS5954060A
JPS5954060A JP57163837A JP16383782A JPS5954060A JP S5954060 A JPS5954060 A JP S5954060A JP 57163837 A JP57163837 A JP 57163837A JP 16383782 A JP16383782 A JP 16383782A JP S5954060 A JPS5954060 A JP S5954060A
Authority
JP
Japan
Prior art keywords
output
signal
auto
capacitor
stop circuit
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
Application number
JP57163837A
Other languages
Japanese (ja)
Inventor
Tokuo Minami
南 徳雄
Teruo Onodera
小野寺 輝雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP57163837A priority Critical patent/JPS5954060A/en
Publication of JPS5954060A publication Critical patent/JPS5954060A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02Control of operating function, e.g. switching from recording to reproducing

Abstract

PURPOSE:To ensure the table detection, by using a monostable multivibrator to measure the period of an input signal. CONSTITUTION:An amplifier 3 has an offset quantity LOS and prevents a malfunction due to noises. The output B of the amplifier 3 is used to the input of a monostable multivibrator 15, and the output of the vibrator 15 is shown by D. The rise slope of a waveform (C) is decided by the time constants of a capacitor 17 and a resistance 16, and the output is set at LOW when the voltage of a capacitor terminal exceeds the threshold voltage VTH. At the same time, the vibrator 15 is triggered again by the input signal of (B). Therefore, the output of the vibrator 15 is kept at HIGH when a signal having a pulse repetition period shorter than TW is supplied. In such a way, the detection is performed with extremely high stability.

Description

【発明の詳細な説明】 本発明はテープレコーダにおいて、テープ走行の動きを
検出し、テープが止まれば自動的ζこ。
DETAILED DESCRIPTION OF THE INVENTION The present invention is a tape recorder that detects the movement of the tape and automatically stops the movement when the tape stops.

主回路の電源をオフするオートストップ回路ζζ好適な
回路に関する。           2゜従来、消費
電力が問題となるミニタイプのテ。
The present invention relates to an auto-stop circuit ζζ suitable for turning off the power of the main circuit. 2゜Conventionally, mini-type Tees have had problems with power consumption.

−プレコーダにおいてテープの走行が止まれば自動的に
電源がオフする機能(オートストップ。
- A function that automatically turns off the power when the tape stops running in the precoder (auto stop).

機能)は一般的に装備されている。第1図は従。functions) are generally equipped. Figure 1 follows.

来の回路例で以下、その動作を説明する。  5テープ
の走行に対応するモータが一般にセラ・ト内に存在し、
モータ1はそれに相当する。2・は回転検出をする為の
センサーでその出力は第・2図における(イ)の波形に
対応する。twts時・回転がストップした事を示して
いる。この波形】0を増幅器3にて増幅し、整流回路4
にて整流し。
The operation will be explained below using a conventional circuit example. 5 A motor corresponding to the running of the tape is generally present in the cerato,
Motor 1 corresponds to this. 2 is a sensor for detecting rotation, and its output corresponds to the waveform (a) in Fig. 2. At twts, it indicates that the rotation has stopped. This waveform]0 is amplified by the amplifier 3, and the rectifier circuit 4
Rectified at.

抵抗5、コンデンサ6にて平滑して(ロ)の如き。Smoothed with resistor 5 and capacitor 6 as shown in (b).

波形となる。この信号が比較増幅器7の(利端子。It becomes a waveform. This signal is the (interest terminal) of the comparator amplifier 7.

に入力される。又、比較増幅器の(−)端子には基。is input. Also, the (-) terminal of the comparator amplifier has a base.

準電圧発生回路8より基準電圧VREFが入力さ社。The reference voltage VREF is input from the quasi-voltage generating circuit 8.

比較増幅器の出力にはVnzvより高いレベルの信号が
入力した時、HiGH信号が出力されてトランジスタ9
をONし、更にトランジスタ11をONI、て電源14
から信号処理回路に電圧を供給する。又波形(ロ)にお
いて1>11時にはVngrより信号レベルが低くなる
為、出力はLOWとな。
When a signal with a level higher than Vnzv is input to the output of the comparison amplifier, a HiGH signal is output and the transistor 9
Turn on the transistor 11, and turn on the power supply 14.
supplies voltage to the signal processing circuit from Also, in the waveform (b), when 1>11, the signal level becomes lower than Vngr, so the output becomes LOW.

リトランジスタ9,11はOFF’L、、信号処理回路
Retransistors 9 and 11 are OFF'L, signal processing circuit.

lこ電圧は供給されない。この回路方式の欠点は。No voltage is supplied. What are the drawbacks of this circuit system?

信号電圧と別に設定された基準電圧を比較する。Compare the signal voltage with a separately set reference voltage.

事iこよって判定している為、電源電圧の変化又5は周
囲温度等の変化に対して、常に平滑された。
Since the determination is made based on the fact, changes in the power supply voltage or changes in the ambient temperature, etc., are always smoothed out.

信号電圧と基準電圧との相対関係が一定になる。The relative relationship between the signal voltage and the reference voltage becomes constant.

様に設定されていなければ誤動作の原因となる。If not set correctly, it may cause malfunction.

事lこめる。I'll put everything into it.

本発明の目的は簡単な回路構成で上記した従0来回路の
欠点を解決したオートストップ回路を・提供する車番こ
ある。
An object of the present invention is to provide an auto-stop circuit for automobiles that solves the drawbacks of the conventional circuit described above with a simple circuit configuration.

本発明は解決する手段として、従来、行なっ・ていたレ
ベルによる検出を改め、パルス化した・信号の周期を検
出して判定しようとするもので。
As a means to solve this problem, the present invention attempts to detect and judge the period of a pulsed signal instead of the conventional level-based detection.

ある。be.

第3図は本発明によるオートストップ回路の。FIG. 3 shows an auto-stop circuit according to the present invention.

原理図で、第1図の従来回路と同じ機能を有す。This is a diagram of the principle and has the same function as the conventional circuit shown in FIG.

る素子には同じ番号を付しである。第4図は風3図のプ
ロ?/り図に対応する波形を示す。  2゜−3・ 回転検出手段としては従来と同様でセンサー。
The same numbers are given to the elements. Is figure 4 a pro of wind figure 3? / shows the waveform corresponding to the figure. 2゜-3・The rotation detection means is the same as the conventional sensor.

2の出力に第4図(A)の波形が表われる。増幅。The waveform shown in FIG. 4(A) appears in the output of 2. amplification.

器3はオフセット量LOsを有しており、ノイズ。The device 3 has an offset amount LOs and is noisy.

による誤動作を防いでいる。その出力をこけ(B)。This prevents malfunctions due to Write down the output (B).

の如き波形が出力され、モノステーブルマルチ515(
以下モノマルチと呼ぶ)の入力信号となり°、その出力
は(D)の波形となる。(B)の信号が入。
A waveform like this is output, and the monostable multi 515 (
(hereinafter referred to as a monomulti), and its output has the waveform (D). Signal (B) is input.

力されて、(D)の信号が出力されるモノマルチ・の形
式は様々考えられるが、本発明の主旨では・なく、又、
その回路構成は容易に考えられる為0回路の具体的構成
については言及しない。(C)・の波形の立上り傾斜は
コンデンサ17と抵抗16の。
Various types of mono-multi signals can be considered to output the signal (D), but this is not the gist of the present invention, and
Since the circuit configuration can be easily considered, the specific configuration of the 0 circuit will not be mentioned. The rising slope of the waveform (C) is due to the capacitor 17 and resistor 16.

時定数によって決まるもので、コンデンサ端の。It is determined by the time constant at the end of the capacitor.

電圧がスレシホルド電圧VTRを越えた時出力は。When the voltage exceeds the threshold voltage VTR, the output is.

LOWになる。又(B)の入力信号によってモノ、。becomes LOW. Also, (B) is mono depending on the input signal.

マルチは再トリガされる構成となっている。そ。Multis are configured to be retriggered. So.

の結果パルス周期がTw(コンデンサ端電圧が0゜から
VTHになる迄の時間)より短かい周期を有する信号が
入力された時は、モノマルチの出力はHighを持続す
る。(D)の波形はモノマルチの加 A− 出力信号を表わしている。これは第1図の(ハ)。
As a result, when a signal having a pulse period shorter than Tw (the time required for the voltage at the capacitor end to reach VTH from 0°) is input, the output of the monomulti remains High. The waveform (D) represents the mono-multiple A-output signal. This is (c) in Figure 1.

の信号と同じ信号となっており、以後の回路は。The signal is the same as that of , and the following circuit is as follows.

第1図と同様にトランジスタ9,11より成るス゛イッ
チ回路によって信号処理回路の電源はオン;オフされる
As in FIG. 1, the power to the signal processing circuit is turned on and off by a switch circuit comprising transistors 9 and 11.

以上の説明の様に本発明においては入力信号゛の周期を
モノマルチによって測定しようとする・もので、従来方
式に比べて格段に安定した検出・が可能となる。又本発
明ζこよる特徴の一つとし・て、電源14がオンした時
の起動が容易になってI。
As explained above, in the present invention, the period of the input signal is measured using a monomultiple method, which enables much more stable detection than the conventional method. Also, one of the features of the present invention is that startup is facilitated when the power supply 14 is turned on.

いる。即ち、電源オン時においてはコンデンサ。There is. In other words, when the power is on, it is a capacitor.

17の充it圧はVTHより低くなっている為、モ。Since the charging pressure of 17 is lower than VTH, it is mo.

ノマルチの出力にはHiGH信号が表われて、。A HiGH signal appears on the output of the multimeter.

モータ1を含む信号処理回路の電源は立上る。。The power of the signal processing circuit including the motor 1 is turned on. .

又、コンデンサ18はコンデンサ17が放電しき、。Also, the capacitor 18 discharges from the capacitor 17.

れていない時に電源を投入した時の誤動作を防。Prevents malfunctions when the power is turned on when it is not installed.

ぐ為ζこ、モノマルチの大刀端子に電源変化によって生
ずる微分信号を作りかつ印加する為で、この信号がトリ
カーとなりコンデンサ17の端子間電圧は瞬時にOにな
り、起動は正常に動作す0 ・ 弓  ・ る。
This is to create and apply a differential signal generated by a change in power to the long sword terminal of the monomulti, and this signal acts as a trigger and the voltage between the terminals of capacitor 17 instantly becomes 0, and the startup operates normally.・ Bow ・ Ru.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来のオートストップ回路の原理図1第2図は
第1図に対応する波形図、第3図は本。 発明によるオートストップ回路の原理図、第45図は第
3図に対応する波形図である。 1・・・モータ     2・・・センサー3・・・増
幅器 9.11・・・トランジスタ 15・・・モノステーブルマルチ         1
゜17・・・コンデンサ 5 7′2   図 ?  ヰ  図 才  5  図 1/
Figure 1 is a diagram of the principle of a conventional auto-stop circuit. Figure 2 is a waveform diagram corresponding to Figure 1, and Figure 3 is a book. FIG. 45, which is a principle diagram of the auto-stop circuit according to the invention, is a waveform diagram corresponding to FIG. 3. 1...Motor 2...Sensor 3...Amplifier 9.11...Transistor 15...Monostable multi 1
゜17...Capacitor 5 7'2 Diagram?ヰ Illustration 5 Figure 1/

Claims (1)

【特許請求の範囲】 1、 テープレコーダにおいて、テープの走行を。 検出するセンサを設け、その出力信号をパル5ス化して
モノステーブルマルチに入力し、信。 号が加わる度に、リトリガされ、その出力信。 号薯こよって電子的に電源をスイッチしてなる。 オートストップ回路。 2、上記モノステーブルマルチにおいて、出力0パルス
幅を設定する為のコンデンサの一端を・接地し、該コン
デンサの充電電圧が定められ・た一定レベルを越えない
時、電源がオンし、・越えた時、オフになる構成の特許
請求の範囲・第1項記載のオートストップ回路。   
 +5
[Claims] 1. In a tape recorder, tape running. A sensor is installed to detect the signal, and the output signal is converted into 5 pulses and input into a monostable multi. Every time a signal is added, the output signal is retriggered. The power is switched electronically depending on the name. Auto stop circuit. 2. In the above monostable multi, one end of the capacitor for setting the output 0 pulse width is grounded, and when the charging voltage of the capacitor does not exceed a certain level, the power is turned on. The auto-stop circuit according to claim 1, wherein the auto-stop circuit is configured to turn off when
+5
JP57163837A 1982-09-22 1982-09-22 Auto-stop circuit Pending JPS5954060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57163837A JPS5954060A (en) 1982-09-22 1982-09-22 Auto-stop circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57163837A JPS5954060A (en) 1982-09-22 1982-09-22 Auto-stop circuit

Publications (1)

Publication Number Publication Date
JPS5954060A true JPS5954060A (en) 1984-03-28

Family

ID=15781684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57163837A Pending JPS5954060A (en) 1982-09-22 1982-09-22 Auto-stop circuit

Country Status (1)

Country Link
JP (1) JPS5954060A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007157A (en) * 1989-09-09 1991-04-16 Chiron-Werke Gmbh & Co. Kg Machine tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007157A (en) * 1989-09-09 1991-04-16 Chiron-Werke Gmbh & Co. Kg Machine tool

Similar Documents

Publication Publication Date Title
US4769597A (en) Apparatus for generating index signals, for use in magnetic recording/reproducing apparatuses
JPS5965226A (en) Knocking detecting device for internal combustion engine
JPS6334710B2 (en)
JPS622783A (en) Agc wave detecting circuit
JPS5954060A (en) Auto-stop circuit
US4406981A (en) Rotation stopping apparatus for a motor
US4250450A (en) Detection of engine speed in response to ignition operation
US4365278A (en) Device for detecting non-recorded portions on magnetic tape
US6687075B1 (en) Recording-medium holder insertion detection apparatus
JP2993104B2 (en) Peak detection circuit
US7112959B2 (en) Comparator circuit and rotation detector
JPS596005Y2 (en) Muting when power is on/off
KR930002781Y1 (en) Autostop circuit for vtr
JPS6025154Y2 (en) Muting circuit
KR900004186Y1 (en) Power switching circuit of vcr
JP3042581B2 (en) Rotation detection device
JPS6118462Y2 (en)
KR930000755Y1 (en) Error detecting circuit for viss signal
JPH06112792A (en) Reset circuit
KR980009903U (en) Amplifier Stage Gain Control Circuit
JPH04286009A (en) Power supply circuit
JPH0240586Y2 (en)
JPS6224358Y2 (en)
JP2788679B2 (en) Voice coil motor drive circuit
JPH026503Y2 (en)