KR940004687Y1 - Motor speed control circuit at ff and rew for tape recorder - Google Patents
Motor speed control circuit at ff and rew for tape recorder Download PDFInfo
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- KR940004687Y1 KR940004687Y1 KR2019880006318U KR880006318U KR940004687Y1 KR 940004687 Y1 KR940004687 Y1 KR 940004687Y1 KR 2019880006318 U KR2019880006318 U KR 2019880006318U KR 880006318 U KR880006318 U KR 880006318U KR 940004687 Y1 KR940004687 Y1 KR 940004687Y1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, 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
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/46—Controlling, regulating, or indicating speed
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, 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
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/26—Driving record carriers by members acting directly or indirectly thereon
- G11B15/32—Driving record carriers by members acting directly or indirectly thereon through the reels or cores on to which the record carrier is wound
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/90—Tape-like record carriers
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- Control Of Direct Current Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안에 따른 테이프 레코더의 빨리보내기, 되감기시 모터의 회전속도 제어회로도.1 is a rotational speed control circuit diagram of a motor during fast forwarding and rewinding of a tape recorder according to the present invention.
제2도는 제1도에 있어서 빨리보내기동작시 각부 파형도 및 테이프 양변화 상태도.FIG. 2 is a waveform diagram of each part and a state of change in tape amount in the quick sending operation in FIG.
제3도는 제1도에 있어서 되감기동작시 각부 파형도 및 테이프 양변화 상태도.3 is a waveform diagram of each part and a state in which both tapes are changed during the rewinding operation of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1, 2 : 주파수/전압변화기 3 : 멀티플렉서1, 2: frequency / voltage changer 3: multiplexer
4 : 모터구동회로 R1~R5: 저항4: Motor driving circuit R 1 ~ R 5 : Resistance
IC1~IC3: 오피앰프 M : 모터IC 1 ~ 3 : Op amp M: Motor
본 고안은 테이프 레코더에 있어서 고속회전체의 정지시 충격 방지에 관한 것으로 특히, 빨리보내기(Fast Forward)시나 되감기(Rewind)시에 테이프의 끝이나 처음부분을 발견하여 고속회전체의 속도를 줄이도록 한 테이프 레코더의 빨리보내기, 되감기시 모터의 회전속도 제어회로에 관한 것이다.The present invention relates to the impact prevention when the high speed rotating body is stopped in the tape recorder. In particular, the tape recorder finds the end or the beginning of the tape to reduce the speed of the high speed rotating body. It relates to the speed control circuit of a motor during fast forward and rewind of a tape recorder.
종래에는 테이프를 감아들이는 권취릴측 모터에 인가되는 모터 구동전압이 감겨 있는 테이프의 양에 관계없이 일정하므로 테이프가 권취릴에 거의 다 감긴 상태에서는 테이프를 내보내는 공급릴의 회전속도가 대단히 빨라지게 된다.Conventionally, since the motor driving voltage applied to the winding reel-side motor to wind the tape is constant regardless of the amount of the wound tape, the rotational speed of the feeding reel for discharging the tape becomes very fast when the tape is almost wound on the winding reel. .
따라서, 이러한 상태에서 테이프 진행을 중지시킬 경우 테이프에 많은 충격이 가해지는 문제점이 있었다.Therefore, there is a problem that a lot of impact is applied to the tape when the tape is stopped in this state.
본 고안은 상기한 문제점을 해결하기 위하여, 테이프의 감긴양에 따른 권취릴과 공급릴의 회전속도변화를 검출하고, 그 검출신호에 의해 모터의 회전속도를 제어하여 공급릴과 테이프에 미치는 무리를 방지하게 안출한 것으로, 이를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.In order to solve the above problems, the present invention detects a change in the rotational speed of the take-up reel and the supply reel according to the amount of winding of the tape, and controls the rotational speed of the motor based on the detection signal to affect the feed reel and the tape. In order to prevent this, it will be described in detail with reference to the accompanying drawings as follows.
제1도는 본 고안의 구성을 나타낸 회로도로서, 권취릴측 릴펄스가 인가되는 주파수/전압변환기(1)와, 공급릴측 릴펄스가 인가되는 주파수/전압변환기(2)의 출력단은 비교기용 오피앰프(IC1)의 반전단자와 비반전단자에 각각 접속되며, 그 오피앰프(IC1)의 출력단은 멀티플렉서(3)의 입력단과 저항(R1)에 접속되고, 저항(R1)은 비반전단자가 접지된 인버터용 오피앰프(IC2)의 반전단자에 접속되며, 그 오피앰프(IC2)의 출력단은 상기 멀티플렉서(3)의 타입력단에 접속됨과 동시에 저항(R2)에 접속되어 오피앰프(IC2)의 반전단자로 피드백되고, 상기 멀티플렉서(3)의 출력단은 저항(R4)에 접속되며, 저항(R4)은 모터제어전압(Vin)이 인가되는 저항(R3)과 접속되어 가산기로 동작하는 오피앰프(IC3)의 반전단자에 접속되고, 오피앰프(IC3)의 출력단은 저항(R5)을 거쳐 반전단자로 피드백됨과 동시에 모터구동회로(4)를 통해 모터(M)에 연결되어 구성된다.1 is a circuit diagram showing the configuration of the present invention, the output terminal of the frequency / voltage converter 1 to which the reel-side reel pulse is applied, and the output terminal of the frequency / voltage converter 2 to which the supply reel-side reel pulse is applied. It is connected to the inverting terminal and the non-inverting terminal of IC 1 ), respectively, and the output terminal of the op amp IC 1 is connected to the input terminal of the multiplexer 3 and the resistor R 1 , and the resistor R 1 is the non-inverting terminal. Is connected to the inverting terminal of the inverter op amp IC 2 grounded, and the output terminal of the op amp IC 2 is connected to the type force terminal of the multiplexer 3, and is connected to the resistor R 2 at the same time. of (IC 2) is fed back to the inverting terminal, the output terminal of the multiplexer 3 is connected to a resistor (R 4), resistance (R 4) is the resistance (R 3) applied to the motor control voltage (V in) Connected to the inverting terminal of the operational amplifier IC 3 operating as an adder, and the output terminal of the operational amplifier IC 3 is a resistor ( It is fed back to the inverting terminal via R 5 ) and connected to the motor (M) through the motor drive circuit (4).
상기한 바와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effect of the present invention configured as described above in detail as follows.
제2도는 빨리보내기(Fast Forward)동작시 테이프양의 변화와 제1도 각부의 전압파형을 나타낸 파형도이고, 제3도는 되감기(Rewind)동작시 테이프양의 변화와 제1도 각부의 전압파형을 나타낸 도면이다.FIG. 2 is a waveform diagram showing the variation of the tape amount and the voltage waveform of each part in the fast forward operation, and FIG. 3 is the variation of the tape amount and the voltage waveform of the first part in the rewind operation. It is a diagram showing.
제2(a)도에 나타낸 바와같이 테이프가 모두 공급릴에 감겨있는 상태에서 빨리보내기동작을 수행하면 권취릴의 회전속도에 비해 공급릴의 회전속도가 더 느리므로 빨리보내기동작 초기상태에서 주파수/전압변환기(1)의 출력은 주파수/전압변환기(2)의 출력에 비해 높은 레벨의 전압이 된다.As shown in FIG. 2 (a), if the fast forwarding operation is performed while all the tapes are wound on the supply reel, the rotational speed of the supply reel is slower than the rotational speed of the winding reel. The output of the voltage converter 1 becomes a voltage of a higher level than the output of the frequency / voltage converter 2.
따라서 제2(b)도와 같이 비교기용 오피앰프(IC1)의 출력은 로우가 되며, 공급릴로부터 권취릴로 테이프가 감겨감에 따라 주파수/전압변환기(1)의 출력전압은 하이에서 로우레벨로 주파수/전압변환기(2)의 출력전압은 로우에서 하이레벨로 되어 오피앰프(IC1)의 출력은 제2(b)도와 같이 로우에서 하이레벨로 변화한다.Therefore, as shown in FIG. 2 (b), the output of the comparator op amp IC 1 becomes low, and as the tape is wound from the supply reel to the winding reel, the output voltage of the frequency / voltage converter 1 goes from high to low level. The output voltage of the frequency / voltage converter 2 goes from low to high level, and the output of the op amp IC 1 changes from low to high level as shown in the second (b).
이 출력은 멀티플렉서(3)로 인가됨과 동시에 인버터로서 동작하는 오피앰프(IC2)에 인가되어 제2(c)도에 보인 바와같이 하이에서 로우레벨로 변화하여 멀티플렉서(3)에 인가된다. 멀티플렉서(3)의 선택신호(REW/FF)의 선택에 의해 빨리보내기동작시는 오피앰프(IC2)에서 출력되는 제2(c)도의 입력을 선택하게 되므로 멀티플렉서(3)의 출력단에서 출력되는 제2(d)도와 같은 파형의 출력은 가산기로서 동작하는 오피앰프(IC3)의 반전단자에 인가되어 모터(M)에 가해지는 전압은 이전에 인가되고 있던 전압(Vin)에 제2(d)도의 전압이 더해진 크기와 같다.This output is applied to the multiplexer 3 and at the same time to the op amp IC 2 acting as an inverter, which is changed from high to low level and applied to the multiplexer 3 as shown in FIG. By selecting the selection signal (REW / FF) of the multiplexer 3, the input of the second (c) diagram output from the op amp IC 2 is selected at the time of the fast sending operation, and thus the output signal of the multiplexer 3 is output. The output of the waveform as shown in FIG. 2 (d) is applied to the inverting terminal of the op amp IC 3 operating as an adder so that the voltage applied to the motor M is equal to the second voltage (V in ) previously applied. equal to the magnitude of the voltage in d).
즉, 공급릴이 권취릴보다 천천히 또는 초기상태에는 모터제어전압(Vin)에 하이레벨의 전압을 더하여 모터의 속도를 증가시키므로 권취릴과 공급릴이 빨리 회전하며, 테이프가 권취릴에 많이 감겨 공급릴이 고속회전하고 테이프에 큰 장력이 걸리는 상태에서는 마이너스레벨의 전압이 더해지므로 권취릴과 공급릴의 회전속도가 감소하게 된다.That is, when the supply reel is slower than the winding reel or in the initial state, the motor speed is increased by adding the high level voltage to the motor control voltage (V in ), so the winding reel and the supply reel rotate quickly, and the tape is wound around the winding reel. When the supply reel rotates at a high speed and a large tension is applied to the tape, a negative level voltage is added, so that the rotational speeds of the winding reel and the supply reel decrease.
또한 되감기(Rexing)시에도 제3(a)도에 보인 바와같이 공급릴에 테이프가 많이 감겨 있으며, 이때는 권취릴펄스가 주파수/전압 변환기(2)로 인가(되감기수행시는 빨리보내기수행시의 권취릴측이 공급릴측으로 바뀌므로)되고, 공급릴펄스는 주파수/전압변환기(1)로 인가(되감기수행시는 빨리보내기수행시의 공급릴측의 권취릴측으로 바뀌므로)된다.In addition, even when rewinding, as shown in FIG. 3 (a), a lot of tape is wound around the supply reel. In this case, a winding reel pulse is applied to the frequency / voltage converter 2 (when rewinding is performed, The winding reel side is changed to the supply reel side), and the supply reel pulse is applied to the frequency / voltage converter 1 (since the reel is changed to the winding reel side on the supply reel side at the time of fast forwarding).
따라서, 오피앰프(IC1)의 출력은 제3(b)도와 같이 하이레벨에서 로우(－)레벨로 변화되며, 오피앰프(IC2)의 출력은 제3(c)도와 같이 로우(－)레벨에서 하이레벨로 변화된다.Accordingly, the output of the op amp IC 1 is changed from the high level to the low (−) level as shown in the third (b), and the output of the op amp IC 2 is low (−) as shown in the third (c). Change from level to high level.
이 출력은 멀티플렉서(3)로 각각 인가되는데, 이때 멀티플렉서(3)는 제어신호(REW/FF)에 의해 오피앰프(IC1)에서 출력된 제3(b)도의 전압을 선택하고, 이 전압은 모터(M)에 인가되고 있던 모터제어전압(Vin)과 더해져 모터(M)의 회전속도를 제어하게 된다. 즉 공급릴에 테이프가 많이 감겨 공급릴의 회전속도가 느리고 테이프에 무리가 없는 상태에서는 하이(＋)레벨의 전압이 모터제어전압(Vin)에 더해져 모터(M)가 더 빨리 회전하며, 권취릴에 테이프가 많이 감겨 공급릴의 회전속도가 빠르므로 테이프에 무리가 가해지는 상태에서는 로우(－)레벨의 전압을 모터제어전압(Vin)에 더하여 모터(M)의 회전속도를 줄이게 된다.These outputs are respectively applied to the multiplexer 3, where the multiplexer 3 selects the voltage of the third (b) diagram output from the op amp IC 1 by the control signal REW / FF, and this voltage is In addition to the motor control voltage V in applied to the motor M, the rotation speed of the motor M is controlled. In other words, if the tape is wound around the supply reel and the rotation speed of the supply reel is slow and the tape is smooth, the high level voltage is added to the motor control voltage (V in ) and the motor (M) rotates faster. Since the tape is wound on the reel and the rotation speed of the supply reel is fast, the low speed (−) level is added to the motor control voltage (V in ) to reduce the rotation speed of the motor (M).
상기한 바와같이 본 고안은 테이프의 감긴 양에 따른 권취릴과 공급릴의 회전속도변화를 이용하여 모터의 회전속도를 제어하므로 권취릴에 많은 테이프가 감겨 공급릴의 고속회전할 때 공급릴측과 테이프에 미치는 무리를 방지하는 효과를 갖게 된다.As described above, the present invention controls the rotational speed of the motor by using the change in the rotational speed of the winding reel and the supply reel according to the amount of winding of the tape. It will have the effect of preventing the crowd.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880006318U KR940004687Y1 (en) | 1988-04-30 | 1988-04-30 | Motor speed control circuit at ff and rew for tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880006318U KR940004687Y1 (en) | 1988-04-30 | 1988-04-30 | Motor speed control circuit at ff and rew for tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890021684U KR890021684U (en) | 1989-11-03 |
| KR940004687Y1 true KR940004687Y1 (en) | 1994-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019880006318U KR940004687Y1 (en) | 1988-04-30 | 1988-04-30 | Motor speed control circuit at ff and rew for tape recorder |
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| Country | Link |
|---|---|
| KR (1) | KR940004687Y1 (en) |
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1988
- 1988-04-30 KR KR2019880006318U patent/KR940004687Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR890021684U (en) | 1989-11-03 |
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