KR870000113Y1 - Low-speed play control device of video tape recorder - Google Patents
Low-speed play control device of video tape recorder Download PDFInfo
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- KR870000113Y1 KR870000113Y1 KR2019840009270U KR840009270U KR870000113Y1 KR 870000113 Y1 KR870000113 Y1 KR 870000113Y1 KR 2019840009270 U KR2019840009270 U KR 2019840009270U KR 840009270 U KR840009270 U KR 840009270U KR 870000113 Y1 KR870000113 Y1 KR 870000113Y1
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- capstan motor
- video tape
- transistor
- tape recorder
- voltage
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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
- G11B15/44—Speed-changing arrangements; Reversing arrangements; Drive transfer means therefor
- G11B15/442—Control thereof
-
- 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
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안 저속동작 제어장치의 회로도.1 is a circuit diagram of a low speed motion control device of the present invention.
제2도는 제1도의 각부 파형도.2 is a waveform diagram of each part of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
CM1: 캡스턴모우터 CFG : 속도신호발생장치CM 1 : Capstan Motor CFG: Speed Signal Generator
MM1, MM2: 모노멀티 R1-R5: 저항MM 1 , MM 2 : Monomulti R 1 -R 5 : Resistance
C1-C4: 콘덴서 TR1, TR2: 트랜지스터C 1 -C 4 : Capacitor TR 1 , TR 2 : Transistor
A1, A2: 증폭기 CO1: 비교기A 1 , A 2 : Amplifier CO 1 : Comparator
SW1: 변환스위치 DR1: 캡스턴모우터구동회로SW 1 : Conversion switch DR 1 : Capstan motor drive circuit
본 안고은 비디오 테이프 레코더의 운전제어장치에 있어서, 간헐 주행방식의 저속동작(slow motion) 재생시에 캡스턴모우터의 운전속도를 속도신호발생장치(CFG)로 감지하여 그 속도에 비례하는 브레이크전압을 캡스턴모우터에 인가함으로써 테이프를 정확한 위치에 정치시킬 수 있게한 비디오 테이브 레코더의 저속동작 제어장치에 관한 것이다.This notice is the operation control device of the video tape recorder, which detects the driving speed of the capstan motor by the speed signal generator (CFG) during the slow motion reproduction of the intermittent driving method and captures the brake voltage proportional to the speed. The present invention relates to a low speed motion control apparatus of a video tape recorder which is applied to a motor so that a tape can be fixed at an accurate position.
종래의 비디오 테이프 레코더에 있어서는 간헐 주행방식의 저속동작 재생시에 캡스턴모우터에 일정한 브레이크전압을 테이프가 정지하기 일정위치(테이프의 미끄러짐을 감안)전까지 인가하여 테이프의 주행을 정지시키게 되어 있으므로, 캡스턴모우터에 브레이크전압을 인가하는 시간이 약간만 변화되어도 캡스턴모우터의 운전속도에 큰 영향을 주게되어 테이프를 정확한 위치에 정지시킬 수없는 결점이 있었다.In the conventional video tape recorder, the capstan motor stops running the tape by applying a constant brake voltage to the capstan motor at the time of reproducing the slow motion of the intermittent driving method until the tape stops at a predetermined position (in consideration of the sliding of the tape). Even a slight change in the time required to apply the brake voltage to the rotor had a significant effect on the operation speed of the capstan motor, and the tape could not be stopped in the correct position.
본 고안은 이러한 점을 감안하여 안출한 것으로, 간헐 주행방식의 저속동작 재생시에 캡스턴모우터의 운동속도를 속도신호 발생장치로 검출하여, 그 속도신호발생장치의 검츨신호에 비례한 브레이크 전압을 발생시켜, 즉 캡스턴모우터의 운동속도가 줄어듬에 따라 브레이크전압도 점점 낮아지면서 캡스턴모우터에 인가되어 테이프가 미끄러짐이 없이 정확한 위치에서 정지되게 한 것이다.The present invention has been devised in view of this point, and the motion speed of the capstan motor is detected by the speed signal generator when the low speed motion of the intermittent driving method is reproduced, and the brake voltage is generated in proportion to the detection signal of the speed signal generator. In other words, as the movement speed of the capstan motor decreases, the brake voltage is gradually lowered, and the capstan motor is applied to stop the tape at the correct position without slipping.
이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.This will be described in detail with reference to the accompanying drawings.
제1도에 도시한 바와같이, 캡스턴모우터(CM1)의 운동속도를 검출하는 속도신호발생장치(CFG)의 출력측을 모노멀티(MM1)의 입력측에 접속하여, 그의 출력측을 모노멀티(MM2) 및 저항(R3)을 통하여는 저항(R4) 및 트랜지스터(TR1)의 베이스에 접속하고, 저항(R5)을 통하여는 트랜지스터(TR2)의 베이스에 접속하며, 전원(B+)은 트랜지스터(TR1),(TR2)의 콜렉터 및 콘데서(C3)에 공통접속하여, 트랜지스터(TR2)의 에미터를 콘덴서(C4) 및 증폭기(A1)의 입력측에 접속하고, 증폭기(A1)의 출력측은 일측입력단자에 기준전압(vref)이 인가되는 비교기(CO1)의 타측입력단자에 접속하에 그 비교기(CO1)의 타측입력단자에 접속하에 그 비교기(CO1)의 출력측을 증폭기(A2)을 통하여 변환스위치(SW1)의 브레이크단자(a1)에 접속하며, 변환스위치(SW1)는 캡스턴 모우터구동회로(DR1)에 접속하여 구성한다.As shown in FIG. 1 , the output side of the speed signal generator CFG, which detects the movement speed of the capstan motor CM 1 , is connected to the input side of the mono multi MM 1 , and the output side thereof is mono-multi ( MM 2 ) and resistor R 3 are connected to the base of resistor R 4 and transistor TR 1 , and resistor R 5 is connected to the base of transistor TR 2 and the power source ( B + ) is commonly connected to the collectors of transistors TR 1 and TR 2 and capacitor C 3 so that the emitters of transistor TR 2 are connected to the inputs of capacitor C 4 and amplifier A 1 . connected, and the output side of the amplifier (a 1) is that the comparator under the connection to the other input terminal of the comparator (CO 1) under the connection to the other input terminal of the comparator (CO 1) which is applied a reference voltage (vref) to the one input terminal connected to the brake terminals (a 1) of the selection switch (SW 1) of the output side (CO 1) through the amplifier (a 2), and the switching switch (SW 1) is a capstan Mo Constitute rotor drive circuit connected to the (DR 1).
도면중 미설명 부호 R1,R2는 저항이고,C1,C2는콘덴서이며,A, B, C는 별도의 제어회로(도면에는 도시하지 않았음)에 의해 공급되는 정지신호, 제어전압, 정역벽환시로 입력단지이다.In the drawings, reference numerals R 1 , R 2 are resistors, C 1 , C 2 are capacitors, and A, B, and C are stop signals and control voltages supplied by separate control circuits (not shown). In other words, it is an input complex for forward and reverse wall exchange.
여기서, 변환스위치(SW1)는 정지신호입력단자(A)에 정지신호인 저전위신호가 인가되면 브레이크단자(a1)에 단락되고, 정지신호가 아닌 고전위신호가 인가되면 정상단자(b1)에 단락되는 스위치이다.Here, the conversion switch SW 1 is short-circuited to the brake terminal a 1 when a low potential signal as a stop signal is applied to the stop signal input terminal A, and a normal terminal b when a high potential signal other than a stop signal is applied. It is a switch shorted to 1 ).
이와 같이 구성된 본 고안 전원(B+)이 인가되고, 제2(b)도에 도시한 바와 같이 제어회로에 정지신호가 닌고 전위신호가 인가된 상태에서는 변환스위치(SW1)는 정상단자(b1)에 단락되므로 제어전압입력단자(B)에 인가되는 제어전압이 캡츠턴모우터구동회로(DR1)인가되어 캡스턴모우터(CM1)를 정속속도로 구동시킨다.Thus, the present design power (B +) is applied is configured, claim 2 (b) in which the stop signal is ningo potential signal to the control circuit is the state as shown in Fig switching switch (SW 1) is a normal terminal (b 1 ), the control voltage applied to the control voltage input terminal B is applied to the Capt. Turn motor driving circuit DR 1 to drive the capstan motor CM 1 at a constant speed.
이러한 상태에서 저속동작 재생상태로 되어 제2(b)도에 도시한 바와같이 정지신호입력단자(A)에 정지신호인 저전위신호가 인가될때(t1), 변환스위치(SW1)는 브레이크단자(a1)에 단락되므로 제2(g)도에 도시한 바와 같이 후술할 중폭기(A2)의 출력전압이 캡스턴모우터 구동회로(DR1)에 인가되고,또한 이때 제어회로의 제어에 의해 정역변환신호 입력단자(C)에 정역변환신호가 인가되므로 캡스턴모우터구동회로(DR1)의 출력측에는 제2도의 아와 같이 반전된 전압이 출력되어 캡스턴모우터(CM1)에 브레이크전압으호인가된다.In this state, when the low-speed signal is applied to the stop signal input terminal A as the stop signal input terminal A is applied to the stop signal input terminal A (t 1 ), the changeover switch SW 1 is braked. Since the terminal a 1 is short-circuited, as shown in FIG. 2 (g), the output voltage of the heavy amplifier A 2 to be described later is applied to the capstan motor driving circuit DR 1 , and at this time, the control of the control circuit Since the reverse conversion signal is applied to the reverse conversion signal input terminal C, the reversed voltage is output to the output side of the capstan motor driving circuit DR 1 as shown in FIG. 2 and the brake is applied to the capstan motor CM 1 . Voltage is applied.
따라서, 이때 캡스턴모우터(CM1)의 운전속도가 줄어들므로 속도신호발생장치(CFG)의 속도검출신호는 제2(a)도에 도시한 바와 같이 느리게 발생되어 모터멀티(MM1)의 입력측에 인가되고, 이에 따라 모노 멀티(MM1),(MM2)의 출력측에는 제2(c)도, 제2(d)도에 도시한 바와 같이 주파수가 줄어든 펄스신호가 각각 출력된다.Therefore, at this time, since the operation speed of the capstan motor CM 1 is reduced, the speed detection signal of the speed signal generator CFG is generated slowly as shown in FIG. 2 (a), so that the input side of the motor multi MM 1 is reduced. As a result, as shown in FIG. 2 (c) and FIG. 2 (d), pulse signals having a reduced frequency are output to the output side of the mono multi (MM 1 ) and (MM 2 ).
이와 같이 모노멀티(MM2)에서 출력된 펄스신호는 저항(R3)을 통해 트랜지스터(TR1)를 온시키므로 콘덴서(C3)의 충전전압은 제2(e)도에 도시한 바와 같이 순간적으로 방전된 후 다시 충전되지만, 이대 모노멀티(MM2)에서 출력되는 펄스신호는 점점 늦은 속도로 발생되므로 콘덴서(C3)의 충전전압은 점점 증가되고, 또한 이때 면노멀티(MM1)에서 출력되는 펄스신호는 저항(R5)을 통하여 트랜지스터(TR2)를 온시키므로 콘덴서(C4)의 충전전압도 제2(f)도에 도시한 바와같이 점점증가되어 증폭기(A1)의 입력측에 인가된다.Thus, the pulse signal output from the mono-multi (MM 2) is because turning on the transistor (TR 1) via a resistor (R 3) terminal voltage of the capacitor (C 3) is instantaneously as shown in claim 2 (e) Fig. After discharging, the charging signal of the capacitor C 3 is gradually increased because the pulse signal output from the monochromatic (MM 2 ) is generated at a slower rate, and the output from the surface normal (MM 1 ) is also increased. Since the pulse signal to be turned on the transistor (TR 2 ) through the resistor (R 5 ), the charging voltage of the capacitor (C 4 ) is also gradually increased as shown in Figure 2 (f) to the input side of the amplifier (A 1 ) Is approved.
이에 따라 증폭기(A1)의 출력전압도 점점 증가되어 비교기(CO1)의 반전압력단자에 인가되므로 그 반전 입력단자에 인가되는 전압과 비반전입력단자에 인가되는 기준전압(vref)의 차가 점점 감소되어 그의 출력 측에는 점점 감소되는 전압이 출력되고, 이 전압은 증폭기(A2)의 입력측에 인가되므로 그의 출력측에는 제2(g)도에 도시한 바와 같이 점점 감소되는 전압이 출력되어 캡스턴모우터구동회로(DR1)에 인가되므로 그의 출력측에는 제2(h)도에 도시한 바와같이 점점 감소되는 전압이 출력되어 캡스턴모우터(CM1)에 인가된다. 이와 같이 캡스턴모우터(CM1)에는 그의 운동속도에 비례해서 점점 감소된 브레이크전압이 인가되므로 정지신호가 끝나는 시점(제2도의 t2)에서 테이프의 미끄러짐이 없이 정확히 정지하게 된다.As a result, the output voltage of the amplifier A 1 is gradually increased and applied to the inverting pressure terminal of the comparator CO 1 , so that the difference between the voltage applied to the inverting input terminal and the reference voltage vref applied to the non-inverting input terminal is gradually increased. On the output side thereof, the voltage is reduced and gradually decreased, and this voltage is applied to the input side of the amplifier A 2. Therefore, on the output side thereof, the reduced voltage is output as shown in FIG. 2 (g). Since it is applied to the driving circuit DR 1 , a voltage gradually decreasing as shown in FIG. 2 (h) is output to the output side thereof and applied to the capstan motor CM 1 . In this way, the capstan motor CM 1 is applied with a brake voltage gradually reduced in proportion to its movement speed, and thus stops precisely without slipping of the tape at the end of the stop signal (t 2 in FIG. 2 ).
이상에서와 같이 본 고안은 제어전압이 인가되어 캡스턴모우터가 정상적으로 구동되는 상태에서 정지신호를 인가하여 캡스턴모우터의 운동속도가 느려짐에 따라 그에 비례하여 캡스턴모우터에 인가되는 브레이크전압이 감소되므로 테이프의 미끄러짐이 없이 사용자가 정지시키고자 하는 위치에 정확히 정지시킬수 있는 효과가 있게 된다.As described above, the present invention applies a stop signal in a state in which the capstan motor is normally driven by the control voltage, so that the brake voltage applied to the capstan motor is reduced in proportion to the slow movement speed of the capstan motor. There is an effect that the user can stop exactly where the user wants to stop without slipping the tape.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840009270U KR870000113Y1 (en) | 1984-09-21 | 1984-09-21 | Low-speed play control device of video tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840009270U KR870000113Y1 (en) | 1984-09-21 | 1984-09-21 | Low-speed play control device of video tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR860004066U KR860004066U (en) | 1986-04-25 |
| KR870000113Y1 true KR870000113Y1 (en) | 1987-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019840009270U KR870000113Y1 (en) | 1984-09-21 | 1984-09-21 | Low-speed play control device of video tape recorder |
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| KR (1) | KR870000113Y1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20030028887A (en) * | 2001-10-04 | 2003-04-11 | 주식회사 대우일렉트로닉스 | Apparatus for controlling ball bearing in capstan motor |
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1984
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| KR860004066U (en) | 1986-04-25 |
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