KR910002993Y1 - The floppy disc driver signal playing circuit using field effect transistor - Google Patents

The floppy disc driver signal playing circuit using field effect transistor Download PDF

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Publication number
KR910002993Y1
KR910002993Y1 KR2019870015572U KR870015572U KR910002993Y1 KR 910002993 Y1 KR910002993 Y1 KR 910002993Y1 KR 2019870015572 U KR2019870015572 U KR 2019870015572U KR 870015572 U KR870015572 U KR 870015572U KR 910002993 Y1 KR910002993 Y1 KR 910002993Y1
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KR
South Korea
Prior art keywords
field effect
signal
effect transistor
read
floppy disk
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Application number
KR2019870015572U
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Korean (ko)
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KR890007507U (en
Inventor
김직
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삼성전자 주식회사
안시환
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Priority to KR2019870015572U priority Critical patent/KR910002993Y1/en
Publication of KR890007507U publication Critical patent/KR890007507U/en
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Publication of KR910002993Y1 publication Critical patent/KR910002993Y1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor

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  • Digital Magnetic Recording (AREA)

Abstract

내용 없음.No content.

Description

전개효과 트랜지스터를 이용한 플로피 디스크 드라이버의 신호 재생 회로Signal Reproduction Circuit of Floppy Disk Driver Using Expanding Effect Transistor

제1도는 종래의 회로도.1 is a conventional circuit diagram.

제2도는 본 고안의 회로도.2 is a circuit diagram of the present invention.

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

A : 재생 신호 증폭기 F1F2: 전계효과 트랜지xm터A: Regenerative signal amplifier F 1 F 2 : Field effect transistor xmter

L : 독출 및 기입 헤드 코일L: read and write head coil

본 고안은 전개효과 트랜지스터를 이용하여 구성되는 플로피 디스크 드라이버의 신호재생 회로에 관한 것이다.The present invention relates to a signal reproducing circuit of a floppy disk driver constructed using a deployment effect transistor.

종래의 플로피 디스크 드라이버의 신호 재생 회로는 제1도에 도시한 바와같이 재생신호 증폭기(A)의 양 입력단자에 다이오우트(D1, D2)를 통하여 돌출 및 기입(Read/write)헤드 코닐을 연결하여 구성하고 있으나, 플로피 디스크 드라이버의 동작상태가 기입에서 독출로 바뀔때와 같이 다이오우드(D1, D2)가 불안정한 상태에서는 재생신호 증폭기(A)의 입력양단에 전압차이가 발생하여 재생신호 증폭기(A)의 출력단에 증폭된 전압이 나타남으로써 재생신호의 디지탈 출력에 피크 쉬프트(Peak Shift)를 초래하여 플로피 디스크 드라이버의 데이타 독출 에타를 일으키는 주요원인이 되었다.The signal reproducing circuit of the conventional floppy disk driver has a read / write head conical through both the dies D 1 and D 2 at the input terminals of the reproducing signal amplifier A as shown in FIG. In the unstable state of the diodes (D 1 and D 2 ), such as when the operation state of the floppy disk driver changes from writing to reading, the voltage difference is generated between the inputs of the reproduction signal amplifiers A. The amplified voltage at the output terminal of the signal amplifier A causes a peak shift in the digital output of the reproduction signal, which is a major cause of data readout errors in the floppy disk driver.

본 고안은 상기한 문제점을 개선하기 위하여 안출한 것으로써 다아오드에 의한 스위칭 대신에 전개효과 트랜지스터를 사용하여 스위칭하도록 함으로써 기입에서 독출 동작으로 전활될때의 직류 전압변화로부터 신호 재생회로를 분리시켜 재생신호 증폭기의 출력전압 변화를 극소화하고 나아가 디지탈 신호의 피크 쉬프드를 극소화할 수 있는 플로피 디스크 드라이버의 신호 재생 회로를 제공하는 것을 그 목적으로 한다.The present invention devised to solve the above-mentioned problem, and instead of switching by diodes, it uses switching effect transistors to switch, so that the signal reproduction circuit is separated from the DC voltage change when the read-out operation is performed. It is an object of the present invention to provide a signal reproducing circuit of a floppy disk driver capable of minimizing an output voltage change of an amplifier and further minimizing a peak shift of a digital signal.

이하 첨부된 제2도의 본 고안 회로도를 참조하여 본 고안을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the present invention circuit diagram of FIG.

본 고안의 신호 재생 회로는 재생신호 증폭기(A)의 양 입력단자로 부터 기입 및 독출 헤드코일(L)의 양단 사이에 전계효과 트랜지스터(F1, F2)를 각각 연결하고, 상기한 전계효과 트랜지스터(F1, F2)는 데이터 기입게이트(write gate)신호에 의하여 동시에 온 오 제어되도록 연결 한다. 도면 중 미설명부호 RB는 바이어스용 저항, RL는 독출부하 저항, RD은 댐핑 저항이다.The signal reproducing circuit of the present invention connects the field effect transistors F 1 , F 2 , respectively, between both input terminals of the reproducing signal amplifier A between both ends of the writing and reading head coils L, and the field effect described above. Transistors F 1 and F 2 are connected to be simultaneously controlled on and off by a data write gate signal. In the drawings, reference numeral R B denotes a bias resistor, R L denotes a read load resistor, and R D denotes a damping resistor.

플로피디스크 드라이버의 동작이 데이타 기입에서 독출로 변하게 되면 전계효과 트랜지스터(F1, F2)의 게이트 단자와 연결된 데이터 기입 게이트 신호의 스위칭에 의해 독출 및 기입 헤드코일(L)에 유기되는 신호가 전계효과 트랜지스터(F1, F2)의 를 통해 재생신호 증폭기(A)의 입력으로 전달되고, 플로피디스크 드라이버의 동작이 데이타를 독출에서 기입으로 변하게 되면 전개효과 트랜지스터(F1, F2)는 차단되어 진다. 따라서 전계효과 트랜지스터(F1, F2)가 차단되어짐으로 인하여 전계효과 트랜지스터(F1, F2)의 게이트에 독출헤서 기입동작으로 전환될때에 야기되는 순간적인 전압 변화가 재생신호 증폭기(A)의 입력단으로 인가되지 않게 되어 재생신호증폭기(A)의 출력단에서의 순간적인 전압 변화를 억재하여 디지탈 출력신호의 피크 쉬프트를 극소화하여 올바른 재생신호를 감지할 수 있도록 한다.When the operation of the floppy disk driver changes from data write to read, a signal induced in the read and write head coil L is switched by switching the data write gate signal connected to the gate terminals of the field effect transistors F 1 and F 2 . It is transmitted to the input of the reproduction signal amplifier A through the effect transistors F 1 and F 2 , and the expansion effect transistors F 1 and F 2 are blocked when the operation of the floppy disk driver changes data from reading to writing. It is done. Therefore, the instantaneous voltage change caused when the field effect transistors F 1 and F 2 are shut off and read into the gates of the field effect transistors F 1 and F 2 and is converted into a write operation is caused by the reproduction signal amplifier A. It is not applied to the input terminal, so that the instantaneous voltage change at the output terminal of the reproduction signal amplifier A is suppressed to minimize the peak shift of the digital output signal so that the correct reproduction signal can be detected.

상기한 바와같이 본 고안에 의하여 플로피 디스크드 라이버의 신호 재생 회로에 있어서 재생신호 증폭기의 입력단 신호를 안정하게 하여 줌으로써 재생신호증폭기 출력단의 순간적압 변화를 억제하여 디지탈 출력신호의 피크 쉬프트 극소화 및 데이터 독출 에타 방지의 효과가 있다.As described above, in the signal reproducing circuit of the floppy disk driver, the input terminal of the reproducing signal amplifier is stabilized to suppress the instantaneous pressure change of the reproducing signal amplifier, thereby minimizing the peak shift of the digital output signal and reading the data. It has the effect of preventing eta.

Claims (1)

독출 및 기입 헤드코일(L)과 재생신호 증폭기(A) 사이에 구성되는 플로피 디스크 드라이버의 신호 재생 회로에 있어서, 독출 및 기입 헤드코일(L)과 병렬로 독출 부하저항(RL)을 연결하고, 재생신호 증폭기(A)의 입력단에 댐빙 저항(RD)을 연결하며, 상기한 저항(RLRD)의 양단사이의 스취칭을 위하여 전계효과 트랜지스터(F1, F2)를 연결하여 기입게이트 신호에 의하여 전계효과 트랜지스터(F1, F2)를제어하도록 구성하는 것을 특징으로하는 전계효과 트랜지스터를 이용한 플로피 디스크 드라이버의 신호 재생회로.In the signal reproducing circuit of the floppy disk driver configured between the read and write head coil L and the reproduction signal amplifier A, a read load resistor R L is connected in parallel with the read and write head coil L. In addition, the damping resistor (R D ) is connected to the input terminal of the reproduction signal amplifier (A), and the field effect transistors (F 1 , F 2 ) are connected to each other for speech between the ends of the resistor (R L R D ). A signal reproducing circuit of a floppy disk driver using a field effect transistor, characterized in that the field effect transistors F 1 and F 2 are controlled by a write gate signal.
KR2019870015572U 1987-09-11 1987-09-11 The floppy disc driver signal playing circuit using field effect transistor KR910002993Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870015572U KR910002993Y1 (en) 1987-09-11 1987-09-11 The floppy disc driver signal playing circuit using field effect transistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870015572U KR910002993Y1 (en) 1987-09-11 1987-09-11 The floppy disc driver signal playing circuit using field effect transistor

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KR890007507U KR890007507U (en) 1989-05-16
KR910002993Y1 true KR910002993Y1 (en) 1991-05-03

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