KR910003170Y1 - Oscilation circuit for record bias - Google Patents
Oscilation circuit for record biasInfo
- Publication number
- KR910003170Y1 KR910003170Y1 KR2019880014461U KR880014461U KR910003170Y1 KR 910003170 Y1 KR910003170 Y1 KR 910003170Y1 KR 2019880014461 U KR2019880014461 U KR 2019880014461U KR 880014461 U KR880014461 U KR 880014461U KR 910003170 Y1 KR910003170 Y1 KR 910003170Y1
- Authority
- KR
- South Korea
- Prior art keywords
- recording
- circuit
- bias
- head
- oscillation circuit
- Prior art date
Links
Classifications
-
- 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
- G11B5/03—Biasing
Landscapes
- Digital Magnetic Recording (AREA)
Abstract
내용 없음.No content.
Description
제1도는 OSC 트랜스를 이용한 종래의 발진회로도.1 is a conventional oscillation circuit diagram using an OSC transformer.
제2도는 소거헤드의 인덕턴스(L)성분을 이용한 본 고안의 발진회로도.2 is an oscillation circuit diagram of the present invention using the inductance (L) component of the erase head.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 녹음회로 20 : 녹음 바이어용 발전회로10: recording circuit 20: power generation circuit for recording buyers
30 : 비이트 캔슬회로 HD1:녹음/재생 헤드30: Beat cancel circuit HD 1 : Recording / playback head
HD2: 소거 헤드 BT : 바이어스 트랩 공진회로HD 2 : erase head BT: bias trap resonant circuit
L1-L3: 코일 Q1: 트랜지스터L 1 -L 3 : Coil Q 1 : Transistor
C1-C8: 콘덴서 R1-R5: 저항C 1 -C 8 : Capacitor R 1 -R 5 : Resistance
본 고안은 테이프 레코오더에서의 녹음 바이어스용 발진회로에 관한 것이다.The present invention relates to an oscillation circuit for recording bias in a tape recorder.
종래의 OSC(oscillator)트랜스를 이용한 녹음 바이어스용 발진회로는 제1도에 나타낸 바와같이 구성되어 있다.The oscillation circuit for recording bias using a conventional OSC (oscillator) transformer is configured as shown in FIG.
그러나 이러한 종래의 발진회로는 고가인 OSC트랜스(T1)를 사용하여 발진주파수를 조정해야 하므로서 제품코스트가 상승되는 문제점이 있었다.However, such a conventional oscillation circuit has a problem in that the product cost is increased because the oscillation frequency is adjusted by using an expensive OSC transformer (T 1 ).
본 고안은 별도의 고가인 OSC트랜스를 사용하지 않고 소거헤드의 인덕턴스(L)성분을 이용하여 제품 코스트의 절감은 물론 조정 공수의 절감등의 효과를 얻을수 있도록 안출한 것으로, 이를 첨부한 도면에 의하여 상술하면 다음과 같다.The present invention is designed to reduce the product cost as well as the reduction of adjustment labor by using the inductance (L) component of the erasing head without using a separate expensive OSC transformer. The above is as follows.
제2도에서와 같이 녹음/재생 헤드(HD1)에 바이어스 트랩 공진회로(BT)및 스위치(S1), 저항(R4),(R5), 콘덴서(C7)가 각각 연결된 녹음회로(10)를 구성하고, 상기 녹음회로(10)와 라디오 녹음시에 발생하는 비이트음을제거시키기 위한 스위치(S3), 콘덴서(C6)로 구성된 비이트 캔슬회로(30) 사이에 소거헤드(HD2)및 트랜지스터(Q1), 코일(L1),(L3), 스위치(S2), 콘덴서(C1-C4), 저항(R1-R3)으로 구성된 녹음 바이어스용 발진회로(20)를 연결하여 구성한 것이다.As shown in FIG. 2, the recording circuit in which the bias trap resonant circuit BT, the switch S 1 , the resistors R 4 , R 5 , and the capacitor C 7 are connected to the recording / playback head HD 1 , respectively. And an erasing head between the recording circuit 10 and a bead cancellation circuit 30 composed of a switch S 3 and a condenser C 6 for removing the bead sound generated during radio recording. For recording bias consisting of (HD 2 ) and transistor (Q 1 ), coil (L 1 ), (L 3 ), switch (S 2 ), capacitor (C 1 -C 4 ), and resistor (R 1 -R 3 ) It is configured by connecting the oscillation circuit (20).
이와같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention configured as described above are as follows.
제2도에서와 같이 먼저 세트(SET)가 녹음상태로 되면 녹음 바이어스용 발진회로(20)가 동작하게 되고, 재생상태로 되면 스위치(S2)가 오프상태가 되어 B*전원이 차단되므로 녹음 바이어스용 발진회로(20)는 동작을 중지 하게 된다.As shown in FIG. 2, when the set is first in the recording state, the oscillation circuit 20 for the recording bias is operated, and when the playback state is in the playback state, the switch S 2 is turned off so that the B * power is cut off. The bias oscillation circuit 20 stops the operation.
즉 이와같이 녹음 바이어스용 발진회로(20)가 동작하게 되면 그의 녹음 바이어스용 발진회로(20)의 바이어스전압이 녹음회로(10)내의 콘덴서(C7)와 저항(R4)을 통하여 녹음/재생 헤드(HD1)에 인가된다.That is, when the recording bias oscillation circuit 20 is operated in this manner, the bias voltage of the recording bias oscillation circuit 20 is transferred to the recording / playback head through the capacitor C 7 and the resistor R 4 in the recording circuit 10. Is applied to (HD 1 ).
단 여기서 BT는 녹음 바이어스용 발진회로(20)의 바이어스 전압이 프리암프 출력단으로 흐르지 못하도록방지해줌과 동시에 그의 프리암프로부터 출력된 신호를 녹음/재생 헤드(HD1)로 보내주기 위한 바이어스 트랩공진회로이다.Here, BT prevents the bias voltage of the oscillation circuit 20 for recording bias from flowing to the preamp output stage, and at the same time, sends a signal output from the preamp to the recording / reproducing head HD 1 . Roy.
따라서 프리암프로부터 출력된 신호는 A점에서 녹음 바이어스용 발진회로(20)의 바이어스 전압과 믹싱(mixing)되어 다시 녹음/재생헤드(HD1)의 코일을 통해 전류가 흐르게 된다.Therefore, the signal output from the preamp is mixed with the bias voltage of the recording bias oscillation circuit 20 at point A, and current flows through the coil of the recording / playback head HD 1 again.
이때 전류의 변화에 따른 자력선의 변화는 녹음/재생 헤드(HD1)의 면을 통과하는 자기 테이프를 자화시킴으로써 녹음을 수행하게 된다.In this case, the change of the magnetic force line according to the change of the current is performed by magnetizing the magnetic tape passing through the surface of the recording / playback head HD 1 .
여기서 비이트 캔슬회로(30)는 스위치(S3)의 조작에 의해 발진주파수를 조정하여 라디오 녹음시 발생할수있는 비이트음을 재겨시켜주는 기능을 한다.Here, the bead cancellation circuit 30 functions to adjust the oscillation frequency by the operation of the switch S 3 to capture the beetle sound that may occur during radio recording.
따라서 발진주파수(f)는로 된다.Therefore, the oscillation frequency f It becomes
즉 이와같이 발진주파수(f)는 소기헤드(HD2)의 인덕턴스(L)와 콘덴서(C4)에 의해 결정되기 때문에 그의 소거헤드(HD2)의 "L"값 허용범위를 적게 할 필요가 있다.That is, since the oscillation frequency f is determined by the inductance L of the scavenging head HD 2 and the condenser C 4 , it is necessary to reduce the allowable range of the "L" value of the erasing head HD 2 . .
이상과 같이 동작되는 본 고안은 별도의 고가인 OSC트렌스를 사용하지 않고 소거헤드의 인덕턴스 성분을 이용함으로써 제품코스트의 절감은 물른 조정공수의 절감 효과도 제공할수가 있는 것이다.The present invention, which operates as described above, can use the inductance component of the erasing head without using an extra expensive OSC transformer, thereby reducing the product cost as well as reducing the man-hour.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880014461U KR910003170Y1 (en) | 1988-08-31 | 1988-08-31 | Oscilation circuit for record bias |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880014461U KR910003170Y1 (en) | 1988-08-31 | 1988-08-31 | Oscilation circuit for record bias |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900005811U KR900005811U (en) | 1990-03-09 |
| KR910003170Y1 true KR910003170Y1 (en) | 1991-05-13 |
Family
ID=19278994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019880014461U KR910003170Y1 (en) | 1988-08-31 | 1988-08-31 | Oscilation circuit for record bias |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR910003170Y1 (en) |
-
1988
- 1988-08-31 KR KR2019880014461U patent/KR910003170Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR900005811U (en) | 1990-03-09 |
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