KR900007370Y1 - Kind detecting circuit for the magnetic tape - Google Patents

Kind detecting circuit for the magnetic tape Download PDF

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Publication number
KR900007370Y1
KR900007370Y1 KR2019870009589U KR870009589U KR900007370Y1 KR 900007370 Y1 KR900007370 Y1 KR 900007370Y1 KR 2019870009589 U KR2019870009589 U KR 2019870009589U KR 870009589 U KR870009589 U KR 870009589U KR 900007370 Y1 KR900007370 Y1 KR 900007370Y1
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South Korea
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magnetic tape
magnetic
type
unit
signal
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KR2019870009589U
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Korean (ko)
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KR890001349U (en
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유원영
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삼성전자 주식회사
안시환
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    • 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/02Measuring direction or magnitude of magnetic fields or magnetic flux
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/008Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00813Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

내용 없음.No content.

Description

자기테이프의 종류감지회로Magnetic tape type detection circuit

제1도는 본 고안의 종류감지회로를 보인 블록도.1 is a block diagram showing a kind detecting circuit of the present invention.

제2도는 본 고안의 종류감지회로의 실시예를 보인 상세도.2 is a detailed view showing an embodiment of a kind detecting circuit of the present invention.

제3도는 본 고안의 종류감지회로에 의한 자기테이프의 검출신호를 보인 파형도.Figure 3 is a waveform diagram showing a detection signal of the magnetic tape by the type detecting circuit of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 자기량 검출부 20 : 증폭부10 magnetic field detection unit 20 amplification unit

30 : 비교부 MR1, MR2 : 자기저항센서30: comparison unit MR1, MR2: magnetoresistance sensor

본 고안은 비디오 테이프 레코더 및 오디오 테이프 레코더 등과같이 자기테이프를 사용하는 기기에 있어서, 데크부에 내장된 자기테이프를 종류를 감지하는 자기테이프의 종류감지회로에 관한 것이다.The present invention relates to a magnetic tape type sensing circuit for sensing a type of magnetic tape embedded in a deck in a device using magnetic tape such as a video tape recorder and an audio tape recorder.

자기테이프로서는 노멀(NORMAL)테이프, 크롬테이프 및 메탈테이프 등과같이 여러가지의 종류가 있으며, 이들 자기테이프는 그 동작특성이 각기 다르므로 자기테이프를 사용하는 기기들은 자기테이프의 종류에 따라, 녹음시에는 녹음 바이어스레벨을 조절하고 재생시에는 재생증폭레벨을 조절해야 된다.There are various kinds of magnetic tapes such as normal tape, chrome tape, and metal tape, and since these magnetic tapes have different operating characteristics, the devices using magnetic tape depend on the type of magnetic tape. You should adjust the recording bias level and the playback amplification level during playback.

그러나 종래의 기기에는 자기테이프의 종류를 감지할 수 있는 회로가 구비되어 있지 않고, 단지 스위치를 절환시켜 녹음바이어스레벨 및 재생증폭레벨을 조절하도록 하였다.However, the conventional apparatus is not provided with a circuit capable of detecting the type of magnetic tape, and only by switching the switch to adjust the recording bias level and the reproduction amplifier level.

그러므로 사용자들은 자기테이프를 기기에 내장할 경우에 일일이 그 종류를 확인하고 스위치를 절환시켜야 되므로 사용자에게 많은 번거로움을 주었으며, 또한 사용자가 자기테이프의 종류를 잘못 확인하였을 경우에는 최적의 상태를 녹음 및 재생하지 못하게 되는 등의 문제점이 있었다.Therefore, when the user inserts the magnetic tape into the device, the user has to check the type and change the switch one by one, and it is a lot of trouble for the user. There was a problem such as not being able to play.

따라서, 본 고안의 목적은 자기테이프의 종류를 감지하여 기기전체의 동작을 원활하게 함과 아울러 자기테이프의 종류의 확인착오로 인한 기기의 오동작을 방지할 수 있도록 하는 종류감지회로를 제공하는 데 있다.Accordingly, an object of the present invention is to provide a type detecting circuit which detects the type of magnetic tape to facilitate the operation of the whole device and to prevent the malfunction of the device caused by the error of checking the type of the magnetic tape. .

상기한 바와같은 목적을 가지는 본 고안은 자기저항센서를 사용하여 자기테이프의 종류에 따라 상이한 자기량을 검출한다.The present invention having the purpose as described above uses a magnetoresistive sensor to detect a different magnetic amount according to the type of magnetic tape.

검출한 자기량은 증폭한 후 기준전압과 비교하여 자기테이프의 종류를 감지하고, 감지신호를 구동부를 통해 제어부로 입력시켜 감지한 자기테이프의 종류에 따른 동작을 수행하게 한다.After detecting the magnetic amount is amplified and compared with the reference voltage to detect the type of magnetic tape, and inputs the detection signal to the control unit through the drive unit to perform the operation according to the type of the detected magnetic tape.

이하, 첨부된 도면을 참조하여 본 고안의 종류감지회로를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the type detection circuit of the present invention.

제1도는 본 고안의 종류감지회로의 블록도로서 이에 도시된 바와같이 자기테이프의 자기량을 검출하는 자기량검출부(10)와, 상기 자기량검출부(10)의 검출신호를 증폭하는 증폭부(20)와, 상기 증폭부(20)의 출력신호를 설정된 기준전압과 비교하여 자기테이프의 종류를 감지하는 비교부(30)와, 상기 비교부(30)의 감지신호에 따라 감지한 자기테이프의 종류의 동작을 수행하는 구동부(40) 및 제어부(50)로 구성된다.1 is a block diagram of a kind detecting circuit of the present invention, as shown therein, a magnetic quantity detecting unit 10 for detecting a magnetic amount of a magnetic tape, and an amplifying unit for amplifying a detection signal of the magnetic quantity detecting unit 10 ( 20) and the comparison unit 30 for detecting the type of magnetic tape by comparing the output signal of the amplifier 20 with the set reference voltage and the magnetic tape sensed according to the detection signal of the comparison unit 30. It consists of a driving unit 40 and a control unit 50 for performing a kind of operation.

그리고, 제2도는 본 고안의 종류감지회로의 실시예를 보인 상세도로서 이에 도시된 바와같이, 자기량검출부(10)는 전원(B)에 2개의 자기저항센서(MR1), (MR2)를 직렬로 접속하고, 잡음신호를 제거하기 위하여 대용량의 콘덴서(C1)를 접촉하여 구성한다.And, Figure 2 is a detailed view showing an embodiment of the type detection circuit of the present invention, as shown therein, the magnetism detection unit 10 is connected to the two magnetoresistive sensors (MR1), (MR2) to the power source (B) It is connected in series and configured by contacting the large capacity capacitor C1 to remove the noise signal.

자기저항센서(MR1), (MR2)의 접속점은 콘덴서(C2) 및 저항(R1)을 통해 연산증폭기(OP1)의 반전입력단자(-)에 접속하고, 연산증폭기(OP1)의 출력단자는 저항(R3)을 통해 그의 반전입력단자(-)에 궤환접속함과 아울러 콘덴서(C3) 및 저항(R7)을 통해 연산증폭기(OP2)의 반전입력단자(-)에 접속하여 연산증폭기(OP2)의 출력단자를 가변저항(VR1)을 통해 그의 반전입력단자(-)에 궤환접속하며, 전원(B)에 직렬접속된 저항(R4, R5)의 접속점을 저항(R2), (R6)을 통해 연산증폭기(OP1), (OP2)의 비반전 인력단자(+), (+)에 각기 접속하여 증폭부(20)를 구성하였다.The connection points of the magnetoresistive sensors MR1 and MR2 are connected to the inverting input terminal (-) of the operational amplifier OP1 through the capacitor C2 and the resistor R1, and the output terminal of the operational amplifier OP1 is connected to the resistance ( It is connected to its inverting input terminal (-) through R3) and connected to the inverting input terminal (-) of the operational amplifier OP2 through the capacitor C3 and the resistor R7 to output the operational amplifier OP2. The terminal is feedback-connected to its inverting input terminal (-) through the variable resistor VR1, and the connection point of the resistors R4 and R5 connected in series to the power supply B is connected through the resistors R2 and R6. The amplification part 20 was comprised by connecting to the non-inverting attraction terminals (+) and (+) of (OP1) and (OP2), respectively.

또한, 연산증폭기(OP2)의 출력단자는 저항(R10)을 통해 연산증폭기(OP3)의 비반전 입력단자(+)에 접속하고, 전원(B)에 저항(R8), 가변저항(VR2) 및 저항(R9)을 직렬로 접속하여 가변저항(VR2)의 가변단자를 콘덴서(C4) 및 연산증폭기(OP3)의 반전입력단자(-)에 접속하며, 연산증폭기(OP3)의 출력단자는 구동부(40)에 접속하여 비교부(30)를 구성하였다.In addition, the output terminal of the operational amplifier OP2 is connected to the non-inverting input terminal (+) of the operational amplifier OP3 through the resistor R10, and to the power supply B, the resistor R8, the variable resistor VR2 and the resistor. (R9) is connected in series to connect the variable terminal of the variable resistor (VR2) to the inverting input terminal (-) of the capacitor (C4) and the operational amplifier (OP3), the output terminal of the operational amplifier (OP3) driving section 40 It connected to and comprised the comparison part 30. FIG.

상기에서 자기저항센서(MR1, MR2)는 자기테이프의 주행경로에 설치하여 자기테이프의 자성면에 접촉되게 한다.In the above, the magnetoresistive sensors MR1 and MR2 are installed in the traveling path of the magnetic tape to be in contact with the magnetic surface of the magnetic tape.

이와같이 구성된 본 고안의 전원(B+)이 인가된 상태에서 기기를 동작시켜 데크부에 내장된 자기테이프를 주행시키면, 자기량 검출부(10)의 자기저항센서(MR1, MR2)는 주행되는 자기테이프의 자기량을 검출하게 된다.When the device is operated in a state in which the power supply B + of the present invention configured as described above is operated to drive the magnetic tape embedded in the deck unit, the magnetoresistive sensors MR1 and MR2 of the magnetic quantity detecting unit 10 are driven by the magnetic tape. Magnetic quantity is detected.

이때, 자기테이프는 그 종류에 따라 자기량이 서로 상이하므로 자기저항센서(MR1, MR2)가 검출하는 자기량은 자기테이프의 종류에 따라 다르게 된다.At this time, since the magnetic amounts are different from each other depending on the type of magnetic tape, the magnetic amounts detected by the magnetoresistive sensors MR1 and MR2 are different depending on the type of magnetic tape.

자기저항센서(MR1, MR2)가 검출한 자기테이프의 종류에 따른 자기량의 검출신호는 증폭부(20)의 콘덴서(C2) 및 저항(R1)을 통해 연산증폭기(OP1)로 입력되어 1차증폭되고, 1차증폭된 자기량의 검출신호는 콘덴서(C3) 및 저항(R7)을 통해 연산증폭기(OP2)로 입력되어 제3도에 도시된 바와같이 증폭출력되며, 가변저항(VR1)의 가변에 따라 증폭이득이 조절된다. 이때, 자기량의 검출신호가 증폭부(20)에서 증폭될때 잡음신호도 함께 증폭되므로 가변저항(VR1)을 조절하여 증폭부(20)에서 출력되는 잡음신호의 첨두값(peak to peak)이 2V이하로 되게한다. 그리고, 저항(R1, R2)의 값으로 증폭부(20)에서 출력되는 자기량의 검출신호의 중간레벨이 약 4V정도가 되게 조절하여 잡음신호가 중간레벨을 중심으로 1V이하가 되게 하고, 자기량 검출신호를 플러스 방향으로 포화전압이 크게 되도록 한다.The detection signal of the magnetic amount according to the type of magnetic tape detected by the magnetoresistive sensors MR1 and MR2 is input to the operational amplifier OP1 through the capacitor C2 and the resistor R1 of the amplifier 20 and is primarily input. The amplified and primary amplified detection signal is input to the operational amplifier OP2 through the capacitor C3 and the resistor R7 and amplified and output as shown in FIG. The amplification gain is adjusted according to the variable. At this time, when the detection signal of the magnetic amount is amplified by the amplifier 20, the noise signal is also amplified together, so that the peak value (peak to peak) of the noise signal output from the amplifier 20 by adjusting the variable resistor VR1 is 2V. To Then, by adjusting the values of the resistors R1 and R2 so that the intermediate level of the detection signal of the magnetic amount output from the amplifier 20 is about 4V, the noise signal is less than 1V around the intermediate level. Set the amount detection signal to increase the saturation voltage in the positive direction.

이와같이 증폭부(20)에서 출력되는 신호는 비교부(30)의 연산증폭기(OP3)로 입력되어 저항(R8, R9) 및 가변저항(VR2)으로 설정한 기준전압과 비교증폭되어 제3도에 점선으로 도시된 바와같이 출력된다.As such, the signal output from the amplifier 20 is inputted to the operational amplifier OP3 of the comparator 30 and compared with the reference voltage set by the resistors R8 and R9 and the variable resistor VR2 to be compared to FIG. It is output as shown by the dotted line.

이때, 연산증폭기(OP3)는 2V 이상의 히스테리시스전압을 갖는 소자로 사용하여 잡음신호의 영향을 받지 않도록 하고, 증폭부(20)의 출력신호는 무신호시 약 5V까지 변화하게 되므로 연산증폭기(OP3)의 히스테리시스 전압의 마이너스레벨을 -5V이하로 한다.In this case, the operational amplifier OP3 is used as a device having a hysteresis voltage of 2 V or more, so that the operational signal is not affected by the noise signal, and the output signal of the amplifier 20 is changed to about 5 V when no signal is applied. Let the minus level of the hysteresis voltage of be -5V or less.

이와같이 비교부(30)에서 출력되는 신호는 자기테이프의 종류에 따라 가변되는 것으로 그 비교부(30)의 출력신호로 타이머 집적회로 또는 래치회로등의 구동부(40)에서 사용하고, 제어부(50)에서 자기테이프의 종류에 따른 서보제어를 수행하고, 종류를 표시할 수 있다.In this way, the signal output from the comparator 30 varies according to the type of magnetic tape. The signal is output from the comparator 30 and used in the driver 40 such as a timer integrated circuit or a latch circuit, and the controller 50 Can perform servo control according to the type of magnetic tape and display the type.

이상에서와 같이 본 고안은 자기테이프의 종류를 자동으로 감지하므로 사용자가 일일이 자기테이프의 종류를 확인하여 스위치를 절환해야 되는 번거로움을 제거할 수 있음은 물론 자기테이프의 확인오류로 인한 기기의 오동작을 방지할 수 있는 효과가 있다.As described above, the present invention automatically detects the type of magnetic tape, so that the user can check the type of magnetic tape to eliminate the trouble of switching the switch, as well as malfunction of the device due to the error of checking the magnetic tape. There is an effect that can prevent.

Claims (1)

자기저항센서(MR1, MR2)로 주행하는 자기테이프의 자기량을 검출하는 자기량검출부(10)와, 상기 자기량검출부(10)의 검출신호를 증폭하는 증폭부(20)와, 상기 증폭부(20)의 출력신호를 설정된 기준전압과 비교하여 자기테이프의 종류를 감지신호를 출력하는 비교부(30)로 구성함을 특징으로 하는 자기테이프의 종류감지회로.Magnetic amount detecting unit 10 for detecting the magnetic amount of the magnetic tape running by the magnetoresistive sensors MR1 and MR2, an amplifying unit 20 for amplifying the detection signal of the magnetic field detecting unit 10, and the amplifying unit And a comparator (30) for outputting a sensing signal by comparing the output signal of (20) with a set reference voltage.
KR2019870009589U 1987-06-16 1987-06-16 Kind detecting circuit for the magnetic tape KR900007370Y1 (en)

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KR2019870009589U KR900007370Y1 (en) 1987-06-16 1987-06-16 Kind detecting circuit for the magnetic tape

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Application Number Priority Date Filing Date Title
KR2019870009589U KR900007370Y1 (en) 1987-06-16 1987-06-16 Kind detecting circuit for the magnetic tape

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KR890001349U KR890001349U (en) 1989-03-18
KR900007370Y1 true KR900007370Y1 (en) 1990-08-13

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