KR930005602Y1 - Autoexchange circuit for tv/vcr - Google Patents
Autoexchange circuit for tv/vcr Download PDFInfo
- Publication number
- KR930005602Y1 KR930005602Y1 KR2019880012710U KR880012710U KR930005602Y1 KR 930005602 Y1 KR930005602 Y1 KR 930005602Y1 KR 2019880012710 U KR2019880012710 U KR 2019880012710U KR 880012710 U KR880012710 U KR 880012710U KR 930005602 Y1 KR930005602 Y1 KR 930005602Y1
- Authority
- KR
- South Korea
- Prior art keywords
- transistor
- vcr
- gate
- circuit
- signal
- Prior art date
Links
Classifications
-
- 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
-
- 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
- H03K17/60—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 bipolar transistors
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안에 따른 회로도.1 is a circuit diagram according to the present invention.
제2도는 제1도 각부의 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
1 : 영상신호 출력회로 2, 6 : 출력버퍼1: Video signal output circuit 2, 6: Output buffer
3 : 동기검출회로 4 : 마이콤3: synchronous detection circuit 4: microcomputer
5 : RF변환기 R1-R7 : 저항5: RF converter R1-R7: resistance
D1 : 다이오드 Q1-Q3 : 트랜지스터D1: Diode Q1-Q3: Transistor
I1 : 인버터 AG1, AG2 : 앤드게이트I1: Inverter AG1, AG2: Endgate
본 고안은 TV/VCR절환 회로에 관한 것으로, VCR모드의 유신호 상태에서도 TV모드로 절환되어 이번조 녹화가 이루어 지도록한 것을 특징으로 하는 TV/VCR절환 회로에 관한 것이다.The present invention relates to a TV / VCR switching circuit, and to a TV / VCR switching circuit, wherein the recording is performed in this mode by switching to the TV mode even in the presence of the VCR mode.
TV를 시청하면서 VCR을 통해 녹화하는 이번조 녹화에 대해 종래의 TV/VCR자동 절환 회로는 이번조 녹화가 보호되지 않는 문제점이 있었으며, 본 고안은 이러한 문제점을 해결하기 위한 것이다.The conventional TV / VCR automatic switching circuit has a problem that this recording is not protected, while the present recording is recorded through the VCR while watching TV, the present invention is to solve this problem.
첨부 도면을 참조하여 본 고안의 기술적 내용을 설명하면 다음과 같다.The technical contents of the present invention will be described with reference to the accompanying drawings.
첨부도면 제1도는 본 고안의 구성을 보인 회로도로서, 영상 신호 출력회로(1)는 출력버퍼(6)를 통해 RF변환기(5)에 연결됨과 동시에 출력버퍼(2)와 상기 검출회로(3)를 순차시켜 앤드게이트(AG1)의 일입력단에 연결되고, 마이콤(4)으로 부터의 TV/VCR전환 제어 신호 TV/VCR신호가 인가되는 인버터(I1)는 상기 앤드게이트(AG1)의 타입력단과 마이콤(4)으로 부터의 RC(녹화제어)신호가 입력되는 앤드게이트(AG2)의 타입력단에 연결되며, 앤드게이트(AG2)는 저항(R6)을 거쳐 저항(R7)과 에미터가 접지된 트랜지스터(Q3)의 베이스에 연결되고, 앤드게이트(AG1)는 저항(R3)과 다이오드(D1)를 순차거쳐 상기 트랜지스터(Q3)의 콜렉터와 저항(R4)에 연결되며, 저항(R4)은 에미터가 접지된 트랜지스터(Q2)의 베이스와 접지된 저항(R5)에 연결되고, 그의 콘렉터는 트랜지스터(Q1)의 베이스와 저항(R2)에 접속되며, 전원(Vcc)은 저항(R1)을 통해 상기 트랜지스터(Q1)의 에미터와 저항(R2)에 접속되고, 트랜지스터(Q1)의 콜렉터는 상기 RF변환기(5)에 접속되어 구성된다.1 is a circuit diagram showing the structure of the present invention, wherein the image signal output circuit 1 is connected to the RF converter 5 through an output buffer 6 and at the same time the output buffer 2 and the detection circuit 3 are connected. Are sequentially connected to one input terminal of the AND gate AG1, and the inverter I1 to which the TV / VCR switching control signal TV / VCR signal from the microcomputer 4 is applied is connected to the type force terminal of the AND gate AG1. The RC (recording control) signal from the microcomputer 4 is connected to the type force terminal of the AND gate AG2, and the AND gate AG2 is connected to the resistor R7 and the emitter through the resistor R6. It is connected to the base of the transistor Q3, the AND gate AG1 is connected to the collector and the resistor R4 of the transistor Q3 in sequence through the resistor R3 and the diode D1, the resistor R4 is Emi Is connected to the base of grounded transistor Q2 and grounded resistor R5, and its selector is connected to the base of transistor Q1 and low. A power supply Vcc is connected to the emitter and the resistor R2 of the transistor Q1 through a resistor R1, and a collector of the transistor Q1 is connected to the RF converter 5. It is configured.
상기한 바와같이 구성된 본 고안의 동작 및 작용효과는 다음과 같다.The operation and effect of the present invention configured as described above are as follows.
영상신호 출력 회로(1)로 부터의 영상신호는 출력버퍼(6)를 통해 RF변환기(5)의 영상신호 입력단자로 입력되어 영상신호가 변조되도록 하며, 이와 동시에 입피던스 정학을 위한 출력퍼버(2)를 통해 동기 검출회로(3)로 인가되어 동기 검출 회로(3)를 통해 영상 신호의 유무를 판별하게 된다.The video signal from the video signal output circuit 1 is input to the video signal input terminal of the RF converter 5 through the output buffer 6 so that the video signal is modulated, and at the same time, the output buffer for the suspension of input impedance. It is applied to the synchronous detection circuit 3 through (2) to determine the presence or absence of a video signal through the synchronous detection circuit 3.
이에 따라 동기 검출회로(3)의 출력은 첨부도면 제2도 (3)와 같이 영상 신호가 있을때에 하이, 영상 신호가 없을때 로우 상태로 되어 앤드게이트(AG1)로 인가되는데 앤드게이트(AG1)의 타입력단에는 인버터(I1)에 의해 반전된 TV/VCR신호가 인가되어 앤드게이트(AG1)의 출력은 제2도(AG1)과 같이 VCR는 첨부도면 제2도에서와 같이 VCR모드이면서 녹화상태 일때에만 하이 레벨이 된다.Accordingly, the output of the synchronization detecting circuit 3 is high when there is a video signal and low when there is no video signal as shown in FIG. 2 (3), and is applied to the AND gate AG1. TV / VCR signal inverted by inverter I1 is applied to the type power stage of < RTI ID = 0.0 > Ag1, < / RTI > and output of AND gate AG1 is VCR mode and recording state as shown in FIG. High level only when.
만일 VCR모드이면서 영상신호가 있으면 앤드게이트(AG1)의 출력이 하이가 되어 트랜지스터(Q1)가 온이되므로 트랜지스터(Q1)는 온이 되어 전원(Vcc)은 온이 된 트랜지스터(Q1)를 통해 RF변환기(5)에 공급되고, 이에 따라 자동적으로 VCR모드로 절환된다.If there is a video signal in the VCR mode, the output of the AND gate AG1 becomes high and the transistor Q1 is turned on, so that the transistor Q1 is turned on and the power supply Vcc is turned on through the transistor Q1 turned on. It is supplied to the converter 5, and is thereby automatically switched to the VCR mode.
만약 방송 신호가 없으면 앤드게이트(AG1)의 출력이 로우로 되어 트랜지스터(Q2)가 오프되고, 이에 따라 트랜지스터(Q1)도 오프되어 RF변환기(5)에 전원 공급이 차단되고 TV모드로 자동 절환 된다.If there is no broadcast signal, the output of the AND gate AG1 becomes low and the transistor Q2 is turned off. Accordingly, the transistor Q1 is also turned off, which cuts off the power supply to the RF converter 5 and automatically switches to the TV mode. .
또한 이번조 녹화 상태 즉, 방송 신호가 있으며 VCR모드에서 녹화상태가 되면 앤드게이트(AG2)의 출력이 하이 상태가 되어 트랜지스터(Q3)가 온이되며, 이에 따라 트랜지스터(Q2)(Q1)가 순차 오프되어 TV모드로 자동 절환되고 안테나에 잡힌 방송 신호가 RF변환기(5)의 입력단에 인가되게 된다.In addition, when the current recording state, that is, the broadcast signal and the recording state in the VCR mode, the output of the AND gate AG2 becomes high and the transistor Q3 is turned on. Accordingly, the transistors Q2 and Q1 are sequentially turned on. It is turned off and automatically switched to the TV mode, and the broadcast signal caught by the antenna is applied to the input terminal of the RF converter 5.
상기한 바와같이 본 고안은 VCR모드에서 유신호 상태이어도 녹화상태가 되면 TV모드로 자동 절환되어 이번조 녹화가 수행되도록 하는 효과를 갖게 된다.As described above, the present invention has an effect that the recording is performed this time by automatically switching to the TV mode when the recording state is in the VCR mode even if the signal state.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880012710U KR930005602Y1 (en) | 1988-07-30 | 1988-07-30 | Autoexchange circuit for tv/vcr |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880012710U KR930005602Y1 (en) | 1988-07-30 | 1988-07-30 | Autoexchange circuit for tv/vcr |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900003572U KR900003572U (en) | 1990-02-08 |
| KR930005602Y1 true KR930005602Y1 (en) | 1993-08-23 |
Family
ID=19278130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019880012710U KR930005602Y1 (en) | 1988-07-30 | 1988-07-30 | Autoexchange circuit for tv/vcr |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR930005602Y1 (en) |
-
1988
- 1988-07-30 KR KR2019880012710U patent/KR930005602Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR900003572U (en) | 1990-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4424455A (en) | Glitch eliminating data selector | |
| KR930005602Y1 (en) | Autoexchange circuit for tv/vcr | |
| KR890003588Y1 (en) | Timer mode changing circuit of vtr | |
| KR930004522Y1 (en) | Mode switching circuit of vcr | |
| KR900008278Y1 (en) | Automatic mode selecting circuit for tv/video | |
| KR880004217Y1 (en) | Sound signal modulating circuit | |
| KR900009974Y1 (en) | Mode control of a/v system | |
| KR920005113Y1 (en) | Audio fade-out circuit of camcoder | |
| KR910004442Y1 (en) | Temporarily stop mode practice circuit | |
| KR960009708Y1 (en) | Auto-switching circuit of tv/video mode | |
| KR910007635Y1 (en) | Multi-function too screen mode automatic on/off circuit for vtr | |
| KR880002701Y1 (en) | Input signal modulating circuit of television | |
| KR890006230Y1 (en) | Mode converting circuit of television | |
| KR920008991Y1 (en) | Switching device of an i.f. power supply | |
| KR860000364Y1 (en) | Switching circuit for automatic music selecting and editing | |
| KR910004622Y1 (en) | Automatic selective circuit of video system | |
| KR910009266Y1 (en) | Tr base driving control circuit | |
| KR900010118Y1 (en) | Q-mode automatic switching circuit for vtr | |
| KR940001566B1 (en) | Speed mode designating circuit | |
| KR960009908Y1 (en) | Recording control circuit | |
| KR890000708Y1 (en) | Teletext/computer signal automatic modulating circuit | |
| KR0159412B1 (en) | Apparatus for distinguishing the video signal in video cassette recorder | |
| KR890000709Y1 (en) | Teletext/computer signal automatic modulating circuit | |
| KR900008448Y1 (en) | Synchronicing circuit for special reproducing | |
| KR940000538Y1 (en) | Auto picture switching circuit of picture-in-picture type vcr |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| REGI | Registration of establishment | ||
| FPAY | Annual fee payment |
Payment date: 19951226 Year of fee payment: 4 |
|
| LAPS | Lapse due to unpaid annual fee |