KR930008656Y1 - Steady circuit of capstan motor driving at high speed search - Google Patents

Steady circuit of capstan motor driving at high speed search Download PDF

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KR930008656Y1
KR930008656Y1 KR2019880005303U KR880005303U KR930008656Y1 KR 930008656 Y1 KR930008656 Y1 KR 930008656Y1 KR 2019880005303 U KR2019880005303 U KR 2019880005303U KR 880005303 U KR880005303 U KR 880005303U KR 930008656 Y1 KR930008656 Y1 KR 930008656Y1
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South Korea
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capstan motor
transistor
terminal
comparator
speed search
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KR2019880005303U
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KR890021683U (en
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박세영
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주식회사 금성사
최군선
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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
    • G11B15/18Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46Controlling, regulating, or indicating speed
    • 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
    • G11B15/18Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/26Driving record carriers by members acting directly or indirectly thereon
    • G11B15/28Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal

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  • Control Of Direct Current Motors (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

내용 없음.No content.

Description

고속서치시 캡스턴모터의 구동 안정화 회로Drive stabilization circuit of capstan motor during high speed search

첨부한 도면은 본 고안의 고속서치시 캡스턴모터의 구동 안정화 회로도이다.The accompanying drawings are drive stabilization circuit diagrams of the capstan motor during the high-speed search of the present invention.

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

1 : 비교증폭부 1a : 궤환회로1: Comparative Amplifier 1a: Feedback Circuit

2 : 미분회로 M : 캡스턴 모터2: differential circuit M: capstan motor

TR1-TR4: 트랜지스터 CP1,CP2: 비교기TR 1 -TR 4 : Transistor CP 1 , CP 2 : Comparator

OP1: 연산증폭기 R1-R7: 저항OP 1 : operational amplifier R 1 -R 7 : resistance

D1-D3: 다이오드D 1 -D 3 : Diode

본 고안은 비디오테이프에 영상신호를 기록 및 재생시키는 비디오 카세트레코더에 있어서, 재생모드에서 고속서치(SEARCH)로, 고속서치에서 재생모드로 캡스터모터를 구동시킬 경우에 따라 캡스턴 모터에 일정 전압을 인가시켜 구동속도를 제어함으로써 캡스턴모터의 구동을 빠른 시간내에 안정화시킬 수 있게한 고속서치시 캡스턴모터의 구동 안정화 회로에 관한 것이다.The present invention provides a video cassette recorder for recording and playing a video signal on a video tape, wherein a capstan motor is supplied with a constant voltage when a capster motor is driven in a high speed search in a playback mode and a high speed search in a playback mode. The present invention relates to a drive stabilization circuit of a capstan motor during a high-speed search capable of stabilizing driving of a capstan motor in a short time by applying a drive speed.

종래의 비디오 카세트 레코더에 있어서는 재생모드와 고속서치시에도 캡스턴 모터에는 동일한 전압이 인가되게 구성되었는 바, 이는 재생모드에서 고속서치로, 고속서치에서 재생모드로 캡스턴모터를 구동시킬 경우에 캡스턴모터의 구동안정시간의 지연되므로 화면 안정시간도 지연되어 화면에 잡음신호등이 출력되기 때문에 시청자가 양질의 화질을 시청할 수 없는 등의 제품에 대한 신뢰성이 저하되는 결함이 있었다.In the conventional video cassette recorder, the capstan motor is configured to apply the same voltage to the capstan motor even in the playback mode and the high-speed search. As the driving stability time is delayed, the screen settling time is also delayed and noise signals are output on the screen, thereby degrading the reliability of the product such as the viewer not being able to watch high quality images.

본 고안은 이와같은 종래의 결함을 감안하여, 재생모드에서 고속서치로, 고속서치에서 재생모드로 캡스턴모터를 구동시킬 경우에 따라 일정전압을 인가시켜 캡스턴 모터의 구동속도를 제어함으로써 캡스턴 모터의 구동을 빠른 시간내에 안정화시킬 수 있도록 안출한 것으로 이를 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.The present invention, in view of the above-mentioned deficiencies, drives the capstan motor by controlling the driving speed of the capstan motor by applying a constant voltage when the capstan motor is driven from the regeneration mode to the high speed search and from the high speed search to the regeneration mode. It will be described to be stabilized in a short time to be described in detail by the accompanying drawings as follows.

첨부한 도면은 본 고안의 고속서치시 캡스턴모터의 구동안정화 회로도로서 이에 도시한 바와같이 비반전 및 반전입력단자(+)(-)에 위상전압(PV) 및 주파수변환전압(FV)이 인간되는 연산증폭기(OP1)의 출력축을 궤환회로(1a)를 통해 그의 반전입력단자(-)에 궤환접속함과 아울러 캡스턴모터(M)의 제어단자(CS1)에 접속하여 비교증폭부(1)를 구성하고, 전원단자(B+)는 저항(R1)(R2)(R3)을 직렬접속하여 저항(R1)(R2) 및 저항(R2)(R3)의 접속점을 비반전 및 반전입력단자(+)(-)에 상기 위상전압(PV)이 기준전압(VA)으로 인가되는 비교기(CP1)(CP2)의 반전 및 반전입력단자(+)(-)에 각각 접속하고, 상기 비교기(CP1)의 출력단자 트랜지스터(TR1)의 베이스에 접속하여 에미터가 저항(R4)을 통한 전원단자(VCC2)에 접속된 트랜지스터(TR2)의 베이스에 접속하고, 트랜지스터(TR2)의 콜렉터는 콜렉터가 상기 전원단자(VCC2)에 접속된 트랜지스터(TR3)의 베이스에 접속하여 그에 에미터를 다이오드(D1)를 통한 전원단자(VCC1)과 함께 캡스턴모터(M)에 공통접속하며, 상기 비교기(CP2)의 출력단자는 콜렉터(C1) 및 저항(R5), 다이오드(D2)로 된 미분회로(2)를 통해 트랜지스터(TR4)의 베이스에 접속하고, 트랜지스터(TR4)의 콜렉터는 저항(R6) 및 다이오드(D3)를 통해 저항(R7)을 통한 방향절환신호입력단자(FRI)와 함께 캡스턴모터(M)의 방향절환단자(FR1)에 접속하여 구성한 것으로, 상기 전원단자(VCC1)(VCC2)에는 12V 및 18V가 각각 인가되게하고, 상기 캡스턴모터(M)가 정 및 역방향구동시에는 방향절환신호 입력단자(FRI)에 고전위 및 저전위신호가 인가되게 한다.The accompanying drawings are a driving stabilization circuit diagram of the capstan motor in the high-speed search of the present invention, the phase voltage PV and the frequency conversion voltage (FV) are human to the non-inverting and inverting input terminals (+) (-) as shown therein. The output shaft of the operational amplifier OP 1 is feedback-connected to its inverting input terminal (-) through the feedback circuit 1a, and is connected to the control terminal CS 1 of the capstan motor M to compare the comparative amplifier 1 The power supply terminal (B + ) connects the resistors (R 1 ) (R 2 ) (R 3 ) in series to connect the connection points of the resistors (R 1 ) (R 2 ) and the resistors (R 2 ) (R 3 ). Inverting and inverting input terminals (+) (-) of the comparator CP 1 (CP 2 ) to which the phase voltage PV is applied to the non-inverting and inverting input terminals (+) (-) as the reference voltage V A. Respectively connected to the base of the output terminal transistor TR 1 of the comparator CP 1 , and the emitter is connected to the base of the transistor TR 2 connected to the power supply terminal VCC 2 through the resistor R 4 . Access to the Tran Requester (TR 2) of the collector is the capstan with a power supply terminal (VCC 1) the emitter thereof to the collector is connected to the base of the transistor (TR 3) connected to said power supply terminal (VCC 2) through the diode (D 1) Commonly connected to the motor (M), the output terminal of the comparator (CP 2 ) of the transistor (TR 4 ) through the differential circuit (2) consisting of the collector (C 1 ) and the resistor (R 5 ), diode (D 2 ) Connected to the base, the collector of the transistor TR 4 is in the direction of the capstan motor M together with the direction switching signal input terminal FRI through the resistor R 7 through a resistor R 6 and a diode D 3 . that is configured to connect the switching terminal (FR 1), the power supply terminal (VCC 1) (VCC 2) is 12V and 18V is applied to be, and the capstan motor (M) is positive and reverse obtain at the same time, the direction switching signal input, respectively The high potential and low potential signals are applied to the terminal FRI.

이와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention configured in this way in detail as follows.

전원단자(VCC1)(VCC2)(B+)에 전원이 인가되고, 비디오카세트레코더의 재생키를 누르면, 전원단자(VCC1)의 전원이 다이오드(D1)를 통해 캡스턴모터(M)에 인가됨과 아울러 방향절환신호입력단자(FRI)에 고전위신호가 인가되어 방향절환 단자(FR1)에 인가되므로 캡스턴모터(M)는 일정속도의 정방향으로 구동되는 한편, 이때 그에 따른 위상전압(PV) 및 주파수변환전압(FV)이 비교증폭부(10)를 통해 비교증폭된 후캡스턴모터(M)의 제어단자(CS1)에 인가되어 그에따른 일정한 주기로 캡스턴모터(M)의 구동속도를 제어하게되고, 또한 이때 위상전압(PV)은 비교기(CP1)(CP2)의 비반전 및 반전 입력단자(+)(-)에 비교전압(VA)으로 인가되어 그 배교기(CP1)(CP2)의 반전 및 비반전입력단자(+)(-)에 인가되는 기준전압(V1)(V2)과 비교된다.When power is applied to the power supply terminals VCC 1 (VCC 2 ) (B + ) and the playback key of the video cassette recorder is pressed, the power supply of the power supply terminal VCC 1 is supplied via the diode D 1 to the capstan motor M. In addition, since the high potential signal is applied to the direction switching signal input terminal FRI and applied to the direction switching terminal FR 1 , the capstan motor M is driven in the positive direction at a constant speed, and at this time, the phase voltage ( PV) and the frequency conversion voltage (FV) are applied to the control terminal (CS 1 ) of the capstan motor (M) after the comparative amplification through the comparison amplifier 10 to drive the drive speed of the capstan motor (M) at regular intervals accordingly. At this time, the phase voltage PV is applied to the non-inverting and inverting input terminals (+) (-) of the comparator CP 1 (CP 2 ) as the comparison voltage V A , so that the multiplier CP 1 is applied. CP 2 is compared with the reference voltage V 1 (V 2 ) applied to the inverting and non-inverting input terminals (+) (−).

여기서, 이때 비교전압(VA) 및 기준전압(V1)(V2)의 관계를 V1〉 VA〉 V2로 설정하면, 비교기(CP1)(CP2)의 출력 단자에는 모두 저전위가 출력된다.Here, if the relationship between the comparison voltage (V A ) and the reference voltage (V 1 ) (V 2 ) is set to V 1 > V A > V 2 , all output terminals of the comparator (CP 1 ) (CP 2 ) are low. The potential is output.

따라서, 비교기(CP1)의 출력단자에서 출력되는 저전위는 트랜지스터(TR1)의 베이스에 인가되어 그가 오프되므로 트랜지스터(TR2)(TR3)로 오프되고, 이에따라 캡스턴모터(M)에는 상기와 같이 다이오드(D1)를 통한 전원단자(VCC1)의 전원이 인가되는 한편, 이때 비교기(CP2)의 출력단자에서 출력되는 저전위는 미분회로(2)를 통해 트랜지스터(TR4)의 베이스에 인가되어 그가 오프되고 이에따라 캡스턴모터(M)의 방향 절환단자(FR1)에는 상기와 같이 정방향신호인 고전위신호가 인가되므로 상기와 같이 캡스턴모터(M)는 재생모드의 일정속도로 구동하게 된다.Therefore, the low potential output from the output terminal of the comparator CP 1 is applied to the base of the transistor TR 1 and is turned off to the transistor TR 2 (TR 3 ) because it is turned off. Accordingly, the capstan motor M While the power supply of the power supply terminal VCC 1 through the diode D 1 is applied as described above, the low potential output from the output terminal of the comparator CP 2 is applied to the transistor TR 4 through the differential circuit 2. The capstan motor M is driven at a constant speed in the regeneration mode because the high potential signal, which is a forward signal, is applied to the direction switching terminal FR 1 of the capstan motor M accordingly. Done.

이와같은 상태에서 사용자가 정방향고속서치를 하기위하여 빨리감기(FF)키를 누르면, 캡스턴모터(M)는 정방향으로 상기의 재생시보다 빠르게 구동되므로 인가되는 위상전압(PV)이 상기되어 비교기(CP1)(CP2)의 비반전 및 반전입력단자(+)(-)에 각기 비교전압(VA)으로 인가되므로 그 비교기(CP1)(CP2)의 반전 및 비반전입력단자(-)(+)에 인가되는 기준전압(V1)(V2)보다 높게되고, 이에따라 비교기(CP2)(CP2)의 출력단자에는 각각 고전위 및 저전위가 출력된다.In this state, when the user presses the fast forward (FF) key to perform the forward fast search, the capstan motor M is driven faster in the forward direction than in the above regeneration, so that the applied phase voltage PV is reminded and the comparator CP 1 ) non-inverting and inverting input terminals (+) (the (CP 2) - so applied), each comparison voltage (V a) to the comparator (CP 1) (inverted and non-inverted input terminal (the CP 2) -) ( Higher than the reference voltage (V 1 ) (V 2 ) applied to the +), and accordingly high potential and low potential are output to the output terminal of the comparator (CP 2 ) (CP 2 ), respectively.

따라서, 비교기(CP2)의 출력단자에서 출력되는 저전위는 미분회로(2)를 통해 트랜지스터(TR4)의 베이스에 인가되어 그가 오프되므로 캡스턴모터(M)의 방향절환단자(FR1)에는 상기와 같이 정방향신호인 고전위신호가 계속 인가되는 한편, 이때 비교기(CP1)의 출력단자에서 출력되는 고전위는 트랜지스터(TR1)의 베이스에 인가되어 그가 온되므로 트랜지스터(TR2)(TR3)도 온되고, 이에따라 전원단자(VCC2)의 전원이 트랜지스터(TR3)를 통해 캡스턴모터(M)에 인가되므로 캡스턴모터(M)는 보다 빠른시간내에 고속서치안정기간에 도달하게 된다.Therefore, the low potential output from the output terminal of the comparator CP 2 is applied to the base of the transistor TR 4 through the differential circuit 2 and is turned off, so that the direction switching terminal FR 1 of the capstan motor M is turned off. As described above, the high potential signal, which is a forward signal, is continuously applied, while the high potential output from the output terminal of the comparator CP 1 is applied to the base of the transistor TR 1 and is turned on so that the transistor TR 2 (TR). 3 ) is also turned on, and thus the power supply of the power supply terminal VCC 2 is applied to the capstan motor M through the transistor TR 3 , so that the capstan motor M reaches the high-speed search stabilization period within a shorter time.

그리고, 이와같은 상태에서 정상적인 재생모드로 원상복귀하기 위하여 빨리감기(FF)키를 다시 누르면, 위상전압(PV)이 순간적으로 감소되어 비교기(CP1)(CP2)의 비반전 및 반전입력단자(-)(+)에 비교전압(VA)으로 인가되므로 그의 반전 및 비반전입력단자(-)(+)에 인가되는 기준전압(V1)(V2)보다 낮게되고, 이에따라 비교기(CP2)(CP2)에는 저전위 및 고전위가 출력된다.In this state, when the fast forward (FF) key is pressed again to return to the normal playback mode, the phase voltage PV is momentarily reduced to non-inverting and inverting input terminals of the comparator CP 1 and CP 2 . Since it is applied as a comparison voltage (V A ) to (-) (+), it becomes lower than the reference voltage (V 1 ) (V 2 ) applied to its inverted and non-inverting input terminals (-) (+), and accordingly the comparator (CP) 2 ) (CP 2 ) low and high potentials are output.

따라서 비교기(CP1)의 출력단자에서 출력되는 저전위는 트랜지스터(TR1)의 베이스에 인가되므로 그가 오프되어 트랜지스터(TR2)(TR3)도 오프되고, 이에따라 전원단자(VCC1)의 전원이 다이오드(D1)를 통해 캡스턴모터(M)에 인가되는 한편, 이때 비교기(CP1)의 출력단자에서 출력되는 고전위는 미분회로(2)의 콘덴서(C1) 및 저항(R5)를 통해 미분된 후 다이오드(D2)를 통해 마이너스신호는 제거되어 트랜지스터(TR4)의 베이스에 인가되므로 그가 온되고, 이에 따라 방향 절환신호입력단자 (FRI)에 인가되는 정방향신호인 고전위신호가 저항(R7), 다이오드(D3) 및 트랜지스터(TR4)를 통해 접지되므로 캡스턴모터(M)의 방향절환단자(FR1)에 저전위신호가 인가되고, 이에따라 캡스턴모터(M)가 순간적으로 브레이크되어 캡스턴모터(M)의 구동속도가 급격히 감속되므로 빠른시간내에 정상속도의 정방향으로 구동되어 정상 재생모드로 동작된다.Therefore, since the low potential output from the output terminal of the comparator CP 1 is applied to the base of the transistor TR 1 , it is turned off, so that the transistor TR 2 (TR 3 ) is also turned off, and accordingly, the power supply of the power supply terminal VCC 1 . The high potential output from the output terminal of the comparator CP 1 is applied to the capstan motor M through the diode D 1 , while the capacitor C 1 and the resistor R 5 of the differential circuit 2 are applied. After the derivative through the diode D 2 , the minus signal is removed and applied to the base of the transistor TR 4 so that it is turned on and thus a high potential signal that is a forward signal applied to the direction switching signal input terminal FRI. Is grounded through the resistor R 7 , the diode D 3 and the transistor TR 4 , so that a low potential signal is applied to the direction switching terminal FR 1 of the capstan motor M, whereby the capstan motor M is Momentarily brakes, driving speed of capstan motor (M) decreases rapidly So it is driven in the forward direction of the normal rate in a short time is operated in the normal playback mode.

그리고, 재생모드에서 되감기(REW)키를 눌러 역방향 고속서치를 할 경우에는 캡스턴모터(M)의 방향절환단자(FR1)에 인가되는 방향절환신호만이 정방향고속서치시와 반대로 저전위로 인가되어 정방향고속서치시의 경우와 동일하게 캡스턴모터(M)는 보다 빠르게 역방향고속서치안정기간에 도달되고, 역방향고속서치에서 재생모드를 할 경우에도 정방향고속서치에서 재생모드시와 동이하게 제어하여 안정되게 동작된다.When the reverse high speed search is performed by pressing the rewind key in the regeneration mode, only the direction change signal applied to the direction change terminal FR 1 of the capstan motor M is applied at low potential as opposed to the case of the forward high speed search. As in the case of the forward high speed search, the capstan motor M reaches the reverse high speed search stability period more quickly, and even in the case of the regeneration mode in the reverse high speed search, the capstan motor M is controlled in the same way as the regeneration mode in the forward high speed search. It works.

이상에서 설명한 바와같이 재생모드에서 고속서치로, 고속서치에서 재생모드로 캡스턴모터를 구동시킬 경우에 따라 일정전압을 인가시키고, 캡스턴모터의 구동속도를 제어하여 매우 빠른시간내에 캡스턴모터의 구동을 안정화 시킴으로써 양질의 쾌적한 화면을 시청할 수 있게 됨은 물론 고속서치 및 외란에 의해 발생되는 위상의 빠름 및 지연등을 보상할 수 있으므로 서보계의 신뢰성을 향상시킬 수 있는 효과가 있다.As described above, when the capstan motor is driven in the high speed search in the regeneration mode and the regeneration mode in the high speed search, a constant voltage is applied and the driving speed of the capstan motor is controlled to stabilize the driving of the capstan motor in a very short time. By doing so, it is possible to watch a high quality comfortable screen as well as to compensate for the fast and delayed phase caused by high-speed search and disturbance, thereby improving the reliability of the servo system.

Claims (1)

저항(R1)(R2) 및 저항(R2),(R3)의 접속점을 비반전 및 반전입력단자에 상기 위상전압(PV)이 인가되는 비교기(CP1)(CP2)의 반전 및 반전입력단자에 각각 접속하고, 비교기(CP1)의 출력단자 트랜지스터(TR1)의 베이스에 접속하여 그의 콜렉터를 에미터측이 전원단자(VCC2)에 접속된 트랜지스터(TR3)의 베이스에 접속하며, 트랜지스터(TR2)의 콜렉터는 콜렉터가 전원단자(VCC2)에 접속된 트랜지스터(TR3)의 베이스에 접속하여 그의 에미터를 다이오드(D1)를 통한 전원단자(VCC1)와 공통으로 캡스턴모터(M)에 접속하고, 상기 비교기(CP2)의 출력단자는 미분회로(2)를 통해 트랜지스터(TR4)의 베이스에 접속하며, 위상 및 주파수변환전압(PV),(FV)이 인가되는 비교증폭부(1)의 출력측 및 방향 절환신호입력단자(FRI)측은 캡스턴모터(M)의 제어단자(CS1) 및 방향절환단자(FR1)에 각각 접속함과 아울러 그 방항절환 신호입력단자(FRI)측은 다이오드(D3)를 통해 상기 트랜지스터(TR4)의 콜렉터에 접속하여 구성함을 특징으로 하는 고속서치시 캡스턴모터의 구동 안정화 회로.Inverting the comparator CP 1 (CP 2 ) to which the phase voltage PV is applied to the non-inverting and inverting input terminals of the connection points of the resistors R 1 , R 2 , and R 2 , R 3 . And an inverting input terminal, respectively, connected to the base of the output terminal transistor TR 1 of the comparator CP 1 , and the collector thereof connected to the base of the transistor TR 3 whose emitter side is connected to the power supply terminal VCC 2 . The collector of the transistor TR 2 is connected to the base of the transistor TR 3 , whose collector is connected to the power supply terminal VCC 2 , and its emitter is connected to the power supply terminal VCC 1 through the diode D 1 . Commonly connected to the capstan motor (M), the output terminal of the comparator (CP 2 ) is connected to the base of the transistor (TR 4 ) through the differential circuit (2), phase and frequency conversion voltage (PV), (FV) a control terminal (CS 1) and the section direction of the output side and the direction switching signal input terminal (FRI) of the comparison amplifier is section 1 that the capstan motor (M) Terminals each junction box as well as the banghang switching signal input terminal (FRI) side diode (D 3) a high-speed search, characterized in that the configuration and connected to the collector of the transistor (TR 4) through the capstan motor on (FR 1) Driving stabilization circuit.
KR2019880005303U 1988-04-12 1988-04-12 Steady circuit of capstan motor driving at high speed search KR930008656Y1 (en)

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KR930008656Y1 true KR930008656Y1 (en) 1993-12-23

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