CN2147701Y - Simple figure and words television accessories - Google Patents

Abstract

The utility model relates to a receiver for figure and word televisions, belonging to a simple figure and word television accessory. The utility model comprises an infrared receiver, a television decoder for Chinese figures and words, a synchronous separation circuit, an AV switchover circuit, and a PAL colored video encoder, wherein, the infrared receiver offers remote control signals, the television decoder for Chinese figures and words generates the three primary colors for characters, the synchronous separation circuit offers line-field synchronous signals, and the AV switchover circuit carries out switching for signals in field retracement and field trace. Owing to the realization of the utility model, families with video recorders can receive and watch figure and word television signals on ordinary color televisions, wherein, the figure and word television signals are at field blanking interval. The video channels of the utility model have 6 decibel gain, and the utility model can output standard video signals (1 VP to P 75 omega).

Description

Simple figure and words television accessories

The utility model is a kind of common color television set is received, and is in the simple type teletext adapter of the character and graphic signal of field in the latent phase of TV image signal.

Teletext broadcasting is to become character and graphic signal transformation digit pulse to be inserted in the vertical blanking period of TV image signal, takies wherein delegation or a few row, again its conversion is recovered to picture intelligence at receiving terminal by decoder, and is shown by television set.Receive this character and graphic signal and it is shown on display screen, this need have the special television machine of this function, but the ordinary color tv set that has in a large number in the society does not have this function, is to watch this graph text information that is transmitted by field flyback at all.

For this reason, the purpose of this utility model is to design a kind of simple type picture and text adapter, by with video tape recorder with have the ordinary color tv set coupling of AV input terminal, realizes watching the text graphic information that transmits in the field flyback.For the color television set of no AV input terminal, only need set up a general radio frequency output modulator, can realize watching the information that is in the field flyback too.

The technical solution of simple type teletext adapter of the present utility model is: this adapter includes: the AV commutation circuit, be installed in infrared remote receiver, PAL color video encoding device, synchronizing separator circuit and Chinese teletext decoder in the receive window.The Chinese teletext decoder is that 1Y, 2Y, the 3Y pin of the integrated circuit (IC) 128 by wherein links with 1 and 18 pin, 2 and 3 pin, 4 and 5 pin of the chip IC 4 of PAL color video encoding device respectively, so that the character three primary colors that produced red (R), green (G), blue (B) are exported to PAL color video encoding device; The Chinese teletext decoder is to link by capacitor C 121 and video signal input terminal (VIDEO IN); The Chinese teletext decoder is to link by resistance R 14 and infrared remote receiver, with the remote signal of accepting to be sent here by infrared remote receiver; Synchronizing separator circuit is to link with video signal input terminal (VIDEO IN) by resistance R 502, capacitor C 500; The 16th pin of the chip IC 4 in the output termination PAL color video encoding device of synchronizing separator circuit is so that add to the 16th pin with the capable field sync signal that is produced; PAL color video encoding device links the 6th pin of chip IC 4 and the 3rd pin of the chip IC 1 in the AV commutation circuit by capacitor C 201, so that the video composite video signal (TX VIDEO) that produces is delivered to the AV commutation circuit; The TXD pin of the IC104 of Chinese teletext decoder links through resistance R 206 and AV commutation circuit, and the control signal (TXD) that the AV commutation circuit is sent here according to Chinese teletext decoder is switched; The AV commutation circuit links with audio input end (AUDIOIN) through capacitor C 204, resistance R 201 respectively, link with audio output (AUDIOOUT) through capacitor C 207, resistance R 202, the video output circuit and the video output terminals (VIDEO OUT) that constitute via resistance R 204, R203 and capacitor C 206 link, the video input circuit and the video inputs (VIDEOIN) that constitute via resistance R 200, R205 and capacitor C 200 link, wherein:

Described AV commutation circuit is by looking audio switch integrated circuit (IC) 2 and 7 resistance R 200～R206,9 capacitor C 200～C208 constitute.

Described infrared remote receiver is to be made of photoelectric tube D, 3,4 capacitor C 300～C303 of integrated circuit (IC) and 3 resistance R 300～R302.

Described PAL color video encoding device is to be made of encoder integrated circuit (IC) 4 and 5 capacitor C 400～C404,4 resistance R 401～R404, inductance L 400, retard line D400 and crystal oscillator X400.

Described synchronizing separator circuit is to be made of triode T501 and 500,5 resistance R 501～R505 of capacitor C.

Described Chinese teletext decoder is by 7 triode T1～T7, resistance R 1～R11, R14～R33, capacitor C 101～C131, diode D1～D4, crystal oscillator X1～X2 and teletext video processor IC101, enhancement mode computer control teletext IC circuit 102,8K data buffer IC103, microprocessor IC104, address latch IC105,32K external program memory IC106,32K external data memory IC107, Video processing controller IC 108, Chinese character base IC109,6D latch IC110, two one-shot multivibrator IC111 and IC132,42 select 1 data selector IC112～IC115 and IC124, IC128, six phase inverter IC116,2 inputs, four positive NAND gate IC117,2 inputs four or door IC118 and IC121, IC122, IC126, eight bus bidirectional drive IC119, binary system coincidence counter IC120, double D trigger IC123 and IC129,8 bit shift register IC125, eight d type flip flop IC127,2 inputs four are just formed with door IC130～IC131.

Now the utility model being reached wherein, the operation principle of each part circuit is described below:

1, complete machine operation principle: the vision signal of sending here from video tape recorder one tunnel adds to Chinese teletext decoder, obtains the text broadcast data and produces character three primary colors red (R), green (G), blue (B), through PAL color video encoding outputting video signal.The vision signal that this vision signal and video tape recorder come is switched and is exported television set to.Switching signal is produced by Chinese teletext decoder, teletext program number selection is by remote control transmitter remote control selection operation, infrared signal is received by infrared remote receiver after demodulation is delivered to Chinese teletext decoder after amplifying, thereby realizes the Full remote controlled operation.

2, AN commutation circuit operation principle: the vision signal that video tape recorder is sent here is delivered to the 1st pin of IC2 through resistance R 200, capacitor C 200, and audio signal is delivered to the 10th pin of IC2 through resistance R 201, capacitor C 204.Add to the 3rd pin of chip IC 2 (because China's graph text information is not with sound accompaniment, so sound accompaniment input pin the 9th pin of IC2 adopts capacity earth) by R, the G of Chinese graph-text decoding device output, the vision signal (TX VIDEO) of the encoded generation Word message of B signal.When needs are seen TV, the control signal (TXD) of single chip microcomputer IC104 the 11st pin output low level in the Chinese teletext decoder, the vision signal that export to television set by IC2 the 16th pin this moment is the signal of the 1st pin of IC2, and the audio signal of being exported by IC2 the 12nd pin then is the audio signal of the 10th pin from video tape recorder; When needs were seen the teletext program, control signal (TXD) then was a high level, and video output (VIDEO OUT) is Word message (VIDEO IN), and sound accompaniment is no signal output.

3, infrared remote receiver operation principle: the light signal that is sent by remote control transmitter that photoelectric tube D will receive changes the signal of telecommunication into, add to the 1st pin of integrated circuit (IC) 3, amplitude limit in IC3 amplifies (AMP), bandpass filtering (BWP), peak detection (DET), integration (∫), shaping (WSH), gives Chinese teletext decoder in IC3 the 7th pin output function command code at last.Control it and make corresponding work.

4, PAL color video encoding device operation principle: red (R), green (G) that is sent here by Chinese teletext decoder, blue (B) tristimulus signals add to the 1st and 18,2 and 3,4 and 5 pin of integrated circuit (IC) 4 respectively.The capable field sync signal that is produced by synchronizing separator circuit adds to the 16th pin of IC4, with red (R), green (G), blue (B) signal composition luminance signal, and exports delayed line by the 7th pin and inputs to the 8th pin, delivers to the video adder.Color difference signal after look is paid carrier modulation adds to the video adder and mixes generation video composite video signal with luminance signal behind the external filter network of the 10th pin, and is exported by the 6th pin.12nd, external crystal oscillator and the electric capacity of 13 pin is that look is paid the carrier oscillation circuit, and the external Resistor-Capacitor Unit of the 15th pin constitutes colour burst and inserts timing circuit.

5, synchronizing separator circuit operation principle: when vision signal synchronous head (downwards) arrives, triode T501 saturation conduction.Capacitor C 500 is recharged simultaneously, and a left side is positive right negative.Synchronously in the past, because resistance R 501, R503 are bigger, C500 discharges slowly, makes C500 keep big voltage, and triode T501 ends when vision signal trace content arrives.Like this, the synchronizing signal after the triode T501 collector electrode output paraphase.This synchronizing signal is sent to the composite sync input (the 16th pin) of the integrated circuit (IC) 4 of encoder, is used for coding and produces composite video signal.

6, Chinese teletext decoder operation principle: at first vision signal is held through penetrating with the VIDEO that exports IC101 to through capacitor C 121 couplings, vision signal is taken out teletext data through the self adaptation cutting, the XTAL of the clock signal of teletext and IC101 end oscillator output simultaneously is phase-locked, output map teletext data clock, the data of teletext and clock are respectively by the TTD of IC101, the TTC end is exported to the TTD of IC102, the TTC end, IC102 also carries out separated in synchronization to composite video signal, isolated composite synchronizing signal exports the VCS end of IC102 to by the VCS of IC101 end, is used for regularly cutting and phase-locked output six megahertz read clocks for other circuit use according to the SAND end output SAND of composite synchronizing signal IC102 to the SAND end of IC101.The digitized video that is come by IC101 exports IC102 to through the TTD end, and corresponding clock also exports IC102 to by the TTC end, and IC102 is by control bus (I ²C) SDR, SCL end links to each other with IC104, and IC102 obtains user instruction by control bus, extracts corresponding teletext page data from vision signal, and is cached in IC103.The remote signal that microprocessor IC104 receives from the remote control receiver window is input to P12 and the INT1 end of IC104 through paraphase, the INT1 end of IC104 rings and interrupts to remote control, from P0 mouth output least-significant byte address, access instruction from P2 mouth output most-significant byte address to ic chip 106 remote signal that is received is handled, IC104 gating ic chip 107 is cached in ic chip 107 to the teletext data that will extract by data/address bus afterwards.Because the Po mouth of little processing IC 104 promptly can be used as the output of least-significant byte address, can be used as the input of data again, therefore need be connected in series an address latch IC105 at the Po of IC104 mouth, it is under the control signal effect of the ALE of IC104 end, latch the least-significant byte address of the visit external storage of Po mouth output, realize the address signal of IC104Po mouth and data-signal branch are come.And the serial attribute of text is by after the standard decoding, add that according to the dot matrix explicit address of this attribute the high address of system puts into IC107, then according to the code that receives, under the control of IC104, arrive the dot matrix that IC109 transfers Chinese character, dot array data is gone into IC107 by the Data Control bus cache, owing to needing 19 address wires, IC107 carry out addressing during this to it, and the addressed line of IC104 has only 16, therefore IC104 becomes the address of IC107 according to the code process that receives, earlier there are the Po oral instructions to send high five bit address to IC110 at it, and then transmission low order address AD0～AD13, at this moment the AD14 of IC104, the AD15 end also is used for transmitting a gating signal, gating IC110 under the gate circuit effect of forming by IC117 and IC118, the high address that IC110 is latched passes to IC109 simultaneously, access the dot array data of Chinese character, deposit IC107 in by data wire, IC119 is a bidirectional drive, it is at DIR, under the effect of E end, IC104 is come to the operation branch of IC107 to the operation of IC107 and IC108.After finishing the Chinese character dot matrix and attribute that extracts teletext, IC108 is according to firm when start initial condition of presetting to it of IC104, refresh address line MA0～MA13 by it transfers word lattice from IC107, grating address RA0～RA4 is in the cooperation of its peripheral sequence circuit position that word will show of having made decision, the dot matrix that IC108 accesses is transferred to ic chip 125～IC127 dot array data by data/address bus to carry out and an a string conversion at IC125, delay time at the Q7 of IC125 serial output dot matrix and by IC123, simultaneously, the dot matrix attribute is passed to IC127, the foreground of control character and background colour, under the gating signal effect, pass to IC128, last red (R) at the IC128 composite characters, green (G), blue (B) signal reaches motherboard in order to composite video signal.In the character procedure for displaying, the starting position of character on video screen is adjustable, ic chip 111 and peripheral circuit have constituted change IC108 and have shown the trace start position, the size of regulating resistance R 31 can change the upright position that character shows, the size of regulating resistance R 32 can change the upright position that character shows.IC132 carries out shaping pulse, the output pulse signal clock signal as sequence circuit with the sinusoidal signal of six megahertzes of the phase-locked output of IC101.Ic chip 112, IC113, IC114, IC115 keep apart to IC107 operation and IC108 IC104 to the address wire of the operation of IC107.This teletext has doubly high function, and when receiving doubly high signal, high level of the DBH of IC104 end output is to IC124, be used for controlling the position of grating, showing the lattice information of delegation, at the second capable dot array data that shows a lastrow simultaneously again, to realize doubly high function.Flicker is at high level of the FLASH of IC104 end output, to the SR end of IC128, foreground and the background colour of IC128 is replaced the realization flashing function mutually under the cooperation of IC131.

So far, the utility model has reached its intended purposes, the simple diagram teletext adapter of making concerning the family of existing video tape recorder, as long as itself and the utility model, ordinary color tv set are linked, can watch the teletext program that is in the vertical blanking period very easily, equally also can convert to very easily and watch the normal TV programme that is in a trace.Because internal circuit design is reasonable, cost is low, and is easy to use, is easy to be accepted by vast family, unit.Its video channel can reach the gain of 6dB, and outputting standard vision signal (1Vp-p75 Ω).

Fig. 1 is a theory diagram of the present utility model.

Fig. 2 is an AV commutation circuit schematic diagram in the utility model.

Fig. 3 is an infrared remote receiver electrical schematic diagram in the utility model.

Fig. 4 is a PAL color video encoding device electrical schematic diagram in the utility model.

Fig. 5 is a synchronizing separator circuit electrical schematic diagram in the utility model.

Fig. 6 is the theory diagram of the Chinese teletext decoder in the utility model.

Fig. 7 is a teletext decoding part electrical schematic diagram in the Chinese teletext decoder.

Fig. 8 is a Chinese character base part electrical schematic diagram in the Chinese teletext decoder.

Fig. 9, the 10th, the electrical schematic diagram of this 3 part of microprocessor, external program memory and external data memory in the Chinese teletext decoder.

Figure 11～13rd, the electrical schematic diagram of video display control circuit part in the Chinese teletext decoder.

Figure 14～19th, the electrical schematic diagram of corresponding each peripheral circuit that connects in the Chinese teletext decoder with the each several part circuit.

Above-mentioned Fig. 2～5, Fig. 7～19 are the connection layout of the embodiment of each appropriate section.

Narrate the utility model embodiment below in conjunction with accompanying drawing, and with this utility model is further described, it is as follows that wherein each several part connects enforcement:

1, each element connects and is embodied as (referring to Fig. 2) in the AV commutation circuit: connect the VIDEOIN end after looking the 1st foot meridian capacitor C200, resistance R 200 of audio switch integrated circuit (IC) 2, this end is ground connection after a resistance R 205.The equal ground connection of the 2nd, 4 pin of integrated circuit (IC) 2.The 3rd foot meridian capacitor C201 of IC2 connects vision signal (TX VIDEO) input.The 6th, 11,13,15,18 pin of IC2 all meet positive supply V+.The 8th, 9 pin of IC2 are ground connection behind capacitor C 202, C203 respectively.Connect audio input end (AUDIO IN) after the 10th foot meridian capacitor C204 of IC2, the resistance R 201, connect audio output (AUDIO OUT) after the 12nd foot meridian capacitor C207, the resistance R 202, two capacitor C 205 in parallel, C208 between the 13rd pin and the ground, the 16th pin connects video output terminals (VIDEO OUT) through resistance R 204 ground connection and after resistance R 203, capacitor C 206, the 17th pin connects control signal (TXD) after resistance R 205.

2, each element connection is embodied as (referring to Fig. 3) in the infrared remote receiver: the 1st pin of integrated circuit die I C3 ground connection behind photodiode D300, the 2nd pin is ground connection after resistance R 300, capacitor C 300, the 3rd foot meridian capacitor C301 ground connection, the 4th pin ground connection, the 5th pin meets positive power source terminal V+ through adjustable resistance R301, the 6th foot meridian capacitor C302 ground connection, the 7th pin is that output (R/C OUT) meets R14 and Chinese teletext decoder joins, the 8th pin meets positive power source terminal V+, and after capacitor C 303 ground connection, parallel resistance R302 between the 7th pin and positive power source terminal V+.

3, each element connects and is embodied as (referring to Fig. 4) in the PAL color video encoding device: the 6th pin of coding integrated circuit (IC) 4 connects the AV commutation circuit and through resistance R 403 ground connection, the 7th pin is through resistance R 401, delay line D400 connects the 8th pin, the 8th pin is ground connection after resistance R 402, the 9th, 17 pin ground connection, the 16th pin connects synchronizing separator circuit, the 15th pin meets positive supply VDD and through capacitor C 404 ground connection through resistance R 404, the 14th, 11 pin meet positive supply VDD, the 13rd pin is through crystal oscillator X400, capacitor C 402, capacitor C 403 back ground connection, ground connection behind the 12nd foot meridian capacitor C403, the 10th foot meridian capacitor C400 meets positive supply VDD after the capacitor C 401 through being in parallel with inductance L 400 again.

4, each element connection is embodied as (referring to Fig. 5) in the synchronizing separator circuit: the base stage of triode T501 connects video signal input terminal (VIDEOIN) through resistance R 502, capacitor C 500, base stage meets positive supply VDD through resistance R 503 ground connection and through resistance R 501, the emitter of triode T501 meets positive supply VDD, the collector electrode of triode T501 is through resistance R 504, R505 ground connection, and resistance R 504 connects PAL color video encoding device with the tie point of R505 as synchronous signal output end.

5, the Chinese teletext decoder adopts general Chinese teletext decoder, wherein each element connects and is embodied as that (referring to Fig. 7～Figure 19): (referring to Fig. 7) resistance R 11 1 ends and resistance R 10 1 ends join with capacitor C 121 positive poles and triode T1 base stage, resistance R 11 other ends and triode T1 collector electrode join with resistance R 1 one ends and resistance R 2 one ends and meet power vd D, resistance R 10 other ends and the equal ground connection of resistance R 9 one ends, resistance R 9 other ends and triode T1 emitter and capacitor C 122 negative pole threes are joined, capacitor C 106 connect with resistance R 3 back be in parallel with capacitor C 104 so that be serially connected in and the PLLF2 of IC101 end between, VILS end and capacitor C 102 1 ends and the equal ground connection of capacitor C 103 1 end threes of IC101.The STTV of IC101, VIDEO, BKLVL, PLLT and five ends of CURR are the connecting resistance R1 other end, capacitor C 122 positive poles, capacitor C 102 other ends, capacitor C 103 other ends and resistance R 2 other ends respectively.Capacitor C 107 be in parallel with capacitor C 105 again after resistance R 4 is connected, be serially connected in again subsequently between the PLLF1 end and ground of IC101.Between crystal oscillator X1 and resistance R 5 and the 6DSCO end that is serially connected in IC101 after capacitor C 108 is connected and the 6DSC1 end, the 6DSC1 of IC101 holds ground connection after capacitor C 109.After being in parallel, capacitor C 110 and inductance L 1 be serially connected between the DCLKF end and power vd D of IC101.Be serially connected between the VCC end and ground of IC101 after capacitor C 112 and capacitor C 111 are in parallel.The TTD end of IC101 is held through the TTD that capacitor C 101 meets IC102, the TTC end of TTC termination IC102, F6 termination triode T3 base stage.Triode T3 emitter connects the F6 end of IC102 and through resistance R 25 ground connection.The VCS of IC101, SAND, three ends of TCS join with these three identical ends of IC102 respectively.The HFFIL of IC101, FHSTO, STAMP, STZER, DATAT and six ends of STPHA are ground connection behind capacitor C 119, C118, C117, C116, C115 and C114 respectively, its XTAL end ground connection after crystal oscillator X2, capacitor C 113.The SDA of IC102, SCL end meets power supply V+ respectively behind resistance R 7, R8, SDA, SCL two ends connect P10, the P11 two ends of IC104 respectively.These 7 ends of the D0 of IC102, D1～D6 join with these 7 ends of D6, D5～D0 of IC103 respectively.These 13 ends of the A0 of IC102, A1～A12 join with these 13 ends of A0, A1～A12 of IC103 respectively, and the OE of IC102, WE end joins with OE, the WE end of IC103 respectively.The CS2 of IC103, CS1 end connects positive supply V+ and ground end respectively; Five ends of the Q0 of (referring to Fig. 8) IC110, Q1～Q4 meet five ends of A13, A14～A17 of IC109, Q5 terminating resistor R33 respectively.These eight ends of the D0 of IC109, D1～D7 connect these eight ends of B0, B1～B7 of IC119 respectively.The OE of IC109, CE two ends connect the PSEN end of IC104 and 8 ends of IC117 respectively.The A-1 of IC109, A0, these eight ends of A1～A6 connect Q0, Q1, these eight ends of Q2～Q7 of IC105 respectively.These six ends of the A7 of IC109, A8～A12 connect these six ends of P20, P21～P25 of IC104 respectively.These six ends of the D0 of IC110, D1～D5 connect these six ends of P00, P01～P05 of IC104 respectively.Two ends of E, CLK that have of IC110 connect 6 ends of IC118 and the WR end of IC104 respectively; The INT1 of (referring to Fig. 9) IC104 and P12 end join after resistance R 15 meets power supply V+ with the collector electrode of triode T2.The P1 of IC104, P11 end is connecting resistance R7, R8 respectively.The collector electrode of the INTO termination triode T5 of IC104.Between resistance R 6 and RESET end that is serially connected in IC104 after diode D1 is in parallel and the ground.The RESET end of IC104 meets power supply V+ after capacitor C 120.The RD of IC104, WR two ends connect 10,9 ends of IC131 respectively.The P00 of IC104, P01, these eight ends of P02～P07 connect D0, D1, these eight ends of D2～D7 of IC105 respectively.These eight ends of the P20 of IC104, P21～P27 connect 1A, the 2A of 1A, 2A, 3A, 4A and IC115 of IC114 and 12,10 these eight ends of IC117 respectively.The TXD terminating diode D4 of IC104.The LE end of the ALE/ P termination IC105 of IC104, the OE end of the PSEN termination IC109 of IC104 and the OE end of IC106.The Q0 of IC105, Q1, these eight ends of Q2～Q7 connect A0, A1, these eight ends of A2～A7 of IC106 respectively.The D0 of IC106, D1, these eight ends of D2～D7 connect P00, P01, these eight ends of P02～P07 of IC104 respectively.The A8 of IC106, A9～A14, these eight ends of CE connect P20, P21～P26, these eight ends of P27 of IC104 respectively; These eight ends of D0, the D1 of (referring to Figure 10) IC107, D2～D7 connect A0, A1, these eight ends of A2～A7 of IC119 respectively.These 15 ends of the A0 of IC107, A1～A14 meet 1Y, the 2Y～4Y of IC112 respectively, the 1Y of IC113,2Y～4Y, the 1Y of IC114,2Y～4Y, the 1Y of IC114,2Y, these 15 ends of 3Y.The 4Y end of the WE termination IC114 of IC107.The DIR of IC119, E two ends connect the WR end of IC104,3 ends of IC117 respectively.The B0 of IC119, B1, these eight ends of B2～B7 connect DE, P00, these eight ends of P01, P02～P07 of IC104 respectively; These six ends of RA0, the RA2～RA4 of (referring to Figure 11) IC108 connect the D end of IC109,1,4,9,12 ends of IC121, these six ends of 1 end of IC122 respectively.The MA0 of IC108, MA1, these ten ends of MA2～MA9 connect 1B, the 2B～4B of IC112,1B, the 2B～4B of IC113, these ten ends of 1B, 2B of IC114 respectively.The D0 of IC108, D1, these eight ends of D2～D7 connect these eight ends of P00, P01P02～P07 of IC104 respectively.The WR end of IC104 connects the E end of IC108 through IC116:E.The R/u of IC108, the equal ground connection of Lpstb two ends.Two ends of the CLK of IC108, RESET connect the Q end of IC120 and the Q end of IC111:A respectively; These four ends of Q0, the Q1～Q3 of (referring to Figure 12) IC120 meet 3 of IC116 respectively, 4,5 of IC126,12 these four ends of IC126.The Q1 of IC120 end simultaneously with IC121 2,5,10,13,2 these five ends of IC122 join.The CLK end of the Q2 termination IC129 of IC120.The PE end of IC120 is through capacitor C 128 ground connection.4,5 two ends of IC117 connect 12 ends of IC126,11 ends of IC131 respectively.12,13 two ends of IC131 connect Q1, the Q0 two ends of IC120 respectively.The Q2 end of the 13 termination IC120 of IC126.6 ends of IC117 are through capacitor C 128 ground connection.1,2,10 these three ends of IC126 connect respectively IC116 4,2,6 these three ends of IC126.9 ends of IC126 and 4 ends of IC116 join.9,10 two ends of IC122 connect 11,3 two ends of IC126 respectively.The PL end of the 8 termination IC125 of IC126.The CLK end of the 8 termination IC127 of IC122.The equal ground connection of the P0 of IC120, P1～P3.The SR end of IC120 is through capacitor C 125 ground connection, and this SR holds and connect through resistance R 33 the Q5 end of IC110.The CEP of IC120, CET two termination power supply VCC, 6 ends of CLK termination IC131.1,4,9,12 these four ends of IC121 connect these four ends of RA0, RA1～RA3 of IC108 respectively.The RA4 end of the 1 termination IC108 of IC122.1B, 1A(that 3,6,8,11 these four ends of IC121 meet IC124 respectively comprise 2B), 2A(comprises 3B), 3A(comprises 4B) these eight ends.The 4A end of the 3 termination IC124 of IC122.These four ends of the 1Y of IC124,2Y～4Y connect 1B, 2B, these four ends of 3B of 4B, the IC115 of IC114 respectively; These eight ends of P0, the P1 of (referring to Figure 13) IC125, P2～P7 connect D0, D1, these eight ends of D2～D7 of IC107 respectively, 6 ends of CLK1 termination IC131 and the 3(CLK of IC123:A) end, CLK2 termination SER holds ground connection, 8 ends of PL termination IC126, the 2(D of Q7 termination IC123A) end.The SD end of IC123:A all meets power supply V+ with the SD end of IC123:B.The 5(Q of IC123:A) the end 12(D of the 123:B of termination IC123:B).The 11(CLK of IC123:B) CLK1 of termination IC125 end.The 13(CD of IC123:B) 8(Q) 12 ends of termination IC118:D and join and ground connection, 9(Q) 13 ends of termination IC130 after capacitor C 129 9(Q of termination IC129:B) and 2 ends of IC130:A, with the 4B of IC128.These eight ends of the D1 of IC127, D2～D8 connect these eight ends of D0, D1～D7 of IC107 respectively, 8 ends of CLK termination IC122, these six ends of Q1, Q2～Q6 connect 1A, 2A, 3A, 1B, these six ends of 2B, 3B of IC128 respectively, Q7 holds 1 end that meets IC130 through diode D3,1 end of Q8 termination IC131.11 ends of the A/B termination IC118 of IC128, G are held through capacitor C 130 ground connection, and 1Y, 2Y, that 3Y three ends are exported R(respectively is red) G(is green), the B(orchid) three primary colors.1 end of IC130:A meets the TXD end of IC104, the 9(Q of 2 termination IC129:B behind diode D4) end, the 9 end threes of 4 ends of 3 ends and IC130:B and IC116:D are joined.The P17 end of the 5 termination IC104 of IC130:B, 12 ends of 6 termination IC122:D.8 ends of the 13 termination IC130:C of IC122:D, 5 ends of 11 termination IC122:B.11 ends of the 4 termination IC130:D of IC122:B, 6 ends are through capacitor C 133 ground connection.The P13 end of the 7 termination IC104 of IC130:D.9 ends of the 8 termination IC130:C of IC116:D.The P17 end of the 5 termination IC104 of IC116:C, 10 ends of 6 termination IC130:C.The P16 end of the 2 termination IC104 of IC131:A, 13 ends of 3 termination IC118:D.The 13(CD of IC129:B), 1(SD) two ends all meet power supply VCC, the 12(D) DE of termination IC108 end, the 11(CLK) Q2 of termination IC120 end, 8(Q) end is through capacitor C 130 ground connection; These four ends of 1Y～4Y of (referring to Figure 14) IC112 connect these four ends of A0～A3 of IC107 respectively, 1A, 2A, these four ends of 3A, 4A connect Q0, Q1, these four ends of Q2, Q3 of IC105 respectively, 1B, 2B, these four ends of 3B, 4B connect MA0, MA1, these four ends of MA2, MA3 of IC108 respectively, A/B, G two ends connect respectively IC113 A/B, G two ends.The 1A of IC113,2A, these four ends of 3A, 4A connect Q4, Q5, these four ends of Q6, Q7 of IC105 respectively, 1B, 2B, these four ends of 3B, 4B connect MA4, MA5, these four ends of MA6, MA7 of IC108 respectively, and these four ends of 1Y～4Y connect these four ends of A4～A7 of IC107 respectively.The 1A of IC114,2A, these four ends of 3A, 4A connect P20, P21, these four ends of P22, P23 of IC104 respectively, 1B, 2B, these four ends of 3B, 4B connect these four ends of 1Y of Q3, IC124 of MA8, MA9, the IC120 of IC108 respectively, and these four ends of 1Y～4Y connect these four ends of A4～A7 of IC107 respectively.The 1A of IC115,2A, these four ends of 3A, 4A connect P24, P25, these four ends of P26, WR of IC104 respectively, 1B, 2B, these four ends of 3B, 4B connect 2Y, 3Y, these four ends of 4Y, power supply V+ of IC124 respectively, these four ends of 1Y～4Y meet IC107 respectively these four ends of A12～A14, WE, and the A/B of A/B termination IC114 holds and connect 3 ends of IC117; 9,10 ends of (referring to Figure 15) IC131 connect WR, the RD end of IC104,9 ends of 8 termination IC118 respectively.The P27 end of the 10 termination IC104 of IC118,13 ends of 8 termination IC116:F.12 ends of the 1 termination IC116:F of IC117:A, the Q2 end of 2 termination IC120, the E end of 3 termination IC119; 9,10 ends of (referring to Figure 16) IC117 all connect the P27 end of IC104, and the CE end of 1 end of 8 ends and IC118 and 4 ends of IC118 and IC109 joins.12,13 ends of 2 ends of IC118 and IC117 and the P26 end of IC104 join, the CS end of the 3 termination IC108 of IC118.11 ends of the 5 termination IC117 of IC118, the E end of 6 termination IC110; The base stage of (referring to Figure 17) triode T4 is held through the VCS that resistance R 24 meets IC101, and collector electrode and resistance R 28 1 ends join with resistance R 30 1 ends and power supply V+ end, and emitter and resistance R 27 1 ends and resistance R 26 1 end threes are joined.The other end of resistance R 27 is through capacitor C 127 ground connection, and the other end of resistance R 27 is through resistance R 29 ground connection, and this end also connects the base stage of triode T5 through diode D1.The other end of the base stage connecting resistance R28 of triode T5, the other end of collector electrode and resistance R 30 and the INTO of IC104 end three are joined; The base stage of (referring to Figure 18) triode T6 connects the F6 end of IC101, and emitter connects the base stage of triode T7 after capacitor C 126, resistance R 16, and this emitter is through resistance R 21 ground connection.The base stage of triode T7 meets power supply V+ after adjustable resistance R16, resistance R 17, this base stage is through resistance R 20 ground connection, and collector electrode meets power supply V+ and holds the three to join with the B end of IC132:B, the A of IC132:A through resistance R 18.The A end ground connection of IC132:B, CLK termination power V+, the Rcext end meets power supply V+ through resistance R 23,5 ends of Q termination IC131:B.The B of IC132:A, CLK two ends all meet power supply V+, and the Rcext end meets power supply V+ through resistance R 22,4 ends of Q termination IC131:B.IC131:B output 6 connects these four ends of X2 of CLK, IC104 of CLK, IC125 of CLK, the IC123 of IC120.The Rcext end of (referring to Figure 19) IC111:A meets power supply V+ through resistance R 31, and the Cext end connects the Rcext end through capacitor C 123, the RESET end of Q termination IC108, and the Q end of A termination IC129:A, B and CLK two ends all meet power supply V+.Between the Rcext of IC111:B and the Cext two ends and connect capacitor C 124, the Rcext end meets power supply V+ through resistance R 32, the INTO end of A termination IC104, and B and CLK two ends all meet power supply V+, the D end of Q termination IC129:A.The VCS end of the CLK termination IC101 of IC129:A, CD termination power V+, the P15 end of SD termination IC104.Above-mentioned power vd D is desirable+and 12 volts, power supply V+ is desirable+and 5 volts.

6, the above-mentioned audio switch integrated circuit (IC) 2 of looking adopts TDA8440 or adopts HA11508, and the integrated circuit (IC) 3 in the infrared remote receiver adopts CX20106A, and coding circuit IC4 adopts TEA2000.Various integrated circuits adopt respectively in the Chinese teletext decoder: IC101 is SAA5231, IC102 is SAA5243, IC103 is 6264, and IC104 is 8031, and IC105 is 74LS373, IC106 is 27256, IC107 is 62256, and IC108 is 6845, and IC109 is GB5007C, IC110 is 74LS378, IC111, IC132 is 74LS221, IC112～IC115, IC124, IC128 is 74LS157, and IC116 is 74LS04, IC117 is 74LS00, IC118, IC121, IC122, IC126 is 74LS32, IC123, IC129 is 74LS74, and IC125 is 74LS166, IC127 is 74LS273, IC130, IC131 is 74LS08.

7, when the technicolo that adopts no AV input terminal is regarded receiver as, on above-mentioned basis of the present utility model, set up a general radio frequency output modulator in output.

Claims (7)

1, a kind of simple type teletext adapter with Chinese teletext decoder, of the present utility modelly be characterised in that it comprises: the AV commutation circuit, be installed in the infrared remote receiver in the receive window, PAL color video encoding device, synchronizing separator circuit, the Chinese teletext decoder is the 1Y of the integrated circuit (IC) 128 by wherein, 2Y, the 3Y pin respectively with 1 and 18 pin of the chip IC 4 of PAL color video encoding device, 2 and 3 pin, 4 and 5 pin link, the Chinese teletext decoder is to link by capacitor C 121 and video signal input terminal (VIDEO IN), the Chinese teletext decoder is to link by resistance R 14 and infrared remote receiver, synchronizing separator circuit is by resistance R 502, capacitor C 500 links with video signal input terminal (VIDEO IN), the 16th pin of the chip IC 4 in the output termination PAL color video encoding device of synchronizing separator circuit, PAL color video encoding device links the 6th pin of chip IC 4 and the 3rd pin of the chip IC 1 in the AV commutation circuit by capacitor C 201, the TXD end of Chinese teletext decoder IC104 links through resistance R 206 and AV commutation circuit, the AV commutation circuit is through capacitor C 204, resistance R 201 links with audio input end (AUDIO IN), the AV commutation circuit is through capacitor C 207, resistance R 202 links with audio output (VIDEO OUT), the AV commutation circuit is via resistance R 204, video output circuit and video output terminals (VIDEO OUT) that R203 and capacitor C 206 constitute link, the AV commutation circuit is via resistance R 200, video input circuit and video inputs (VIDEO IN) that R205 and capacitor C 200 constitute link, wherein:

Described AV commutation circuit is by looking audio switch integrated circuit (IC) 2 and 7 resistance R 200～R206,9 capacitor C 200～C208 constitute,

Described infrared remote receiver is to be made of photoelectric tube D, 3,4 capacitor C 300～C303 of integrated circuit (IC) and 3 resistance R 300～R302,

Described PAL color video encoding device is to be made of encoder integrated circuit (IC) 4 and 5 capacitor C 400～C404,4 resistance R 401～R404, inductance L 400, delay line D400 and crystal oscillator X400,

Described synchronizing separator circuit is to be made of triode T501 and 500,5 resistance R 501～R505 of capacitor C,

Described Chinese teletext decoder is by 7 triode T1～T7, resistance R 1～R11, R14～R33, capacitor C 101～C131, diode D1～D4, crystal oscillator X1～X2 and teletext video processor IC101,102,8 data buffers of enhancement mode computer control teletext IC circuit IC103, microprocessor IC104, address latch 105,32K external program memory IC106,32K external data memory IC107, Video processing controller IC 108, Chinese character base IC109,6D latch IC110, two one-shot multivibrator IC111, IC132,42 select 1 data selector IC112～IC115 and IC124, IC128, six phase inverter IC116,2 inputs, four positive NAND gate IC117,2 inputs four or door IC118, IC121, IC122, IC126, eight bus bidirectional drive IC119, binary system coincidence counter IC120, double D trigger IC123, IC129,8 bit shift register IC125, eight d type flip flop IC127,2 inputs four just constitute with door IC130～IC131.

2, teletext adapter according to claim 1, it is characterized in that in the AV commutation circuit that each element is by following connection: the 1st foot meridian capacitor C200 that looks audio switch integrated circuit (IC) 2, connect (VIDEO IN) end after the resistance R 200, should (VIDEO IN) hold ground connection after a resistance R 205, the 2nd of integrated circuit (IC) 2, the equal ground connection of 4 pin, the 3rd foot meridian capacitor C201 of integrated circuit (IC) 2 connects vision signal (TX VIDEO) input, the 6th of integrated circuit (IC) 2,11,13,15,18 pin all meet positive supply V+, the 8th of integrated circuit (IC) 2,9 pin are respectively through capacitor C 202, ground connection behind the C203, integrated circuit (IC) 2 the 10th foot meridian capacitor C204, connect input (AUDIO IN) after the resistance R 201, the 12nd foot meridian capacitor C207 of integrated circuit (IC) 2, connect output (AUDIOOUT) after the resistance R 202, two capacitor C 205 in parallel between its 13rd pin and the ground, C208, its the 16th pin is through resistance R 204 ground connection and through resistance R 203, capacitor C 206 connects output (AUDIO OUT), and its 17th pin connects control signal (TXD) after resistance R 205.

3, teletext adapter according to claim 1, it is characterized in that in the infrared remote receiver that each element is by following connection: the 1st pin of integrated circuit die I C3 ground connection behind photodiode D, the 2nd pin is through resistance R 300, capacitor C 300 back ground connection, the 3rd foot meridian capacitor C301 ground connection, the 4th pin ground connection, the 5th pin meets positive supply V+ through adjustable resistance R301, the 6th foot meridian capacitor C302 ground connection, the 7th pin is that output (R/C OUT) joins with Chinese teletext decoder, the 8th pin meet positive supply V+ and after capacitor C 303 ground connection, parallel resistance R302 between the 7th pin and positive power source terminal V+.

4, teletext adapter according to claim 1, it is characterized in that each element in the PAL color video encoding device is by following connection: the 6th pin of coding integrated circuit (IC) chip IC4 connects the AV commutation circuit and through resistance R 403 ground connection, the 7th pin is through resistance R 401, delay line D400 connects the 8th pin, the 8th pin is ground connection after resistance R 402, the 9th, 17 pin ground connection, the 16th pin connects synchronizing separator circuit, the 15th pin meets positive supply VDD and through capacitor C 404 ground connection through resistance R 404, the 14th, 11 pin meet positive supply VDD, the 13rd pin is through crystal oscillator X400, capacitor C 402, capacitor C 403 back ground connection, ground connection behind the 12nd foot meridian capacitor C403, the 10th foot meridian capacitor C400 meets positive supply VDD behind the electric capacity through being in parallel with inductance L 400 again.

5, teletext adapter according to claim 1, it is characterized in that in the synchronizing separator circuit that each element is by following connection: the base stage of triode T501 connects video signal input terminal (VIDEO IN) through resistance R 502, capacitor C 500, this base stage is through resistance R 503 ground connection, this base stage also meets positive supply VDD through resistance R 501, the emitter of triode T501 meets positive supply VDD, the collector electrode of triode T501 is through resistance R 504, R505 ground connection, and resistance R 504 connects PAL color video encoding device with the tie point of R505 as synchronous signal output end.

6, teletext adapter according to claim 1, it is characterized in that above-mentioned various integrated circuit adopts respectively: IC2 is TDA8440 or HA11508, IC3 is CX20106A, and IC4 is TEA2000, and IC101 is SAA5231, IC102 is SAA5243, IC103 is 6264, and IC104 is 8031, and IC105 is 74LS373, IC106 is 27256, IC107 is 62256, and IC108 is 6845, and IC109 is GB5007C, IC110 is 74LS378, IC111, IC132 is 74LS221, IC112～IC115, IC124, IC128 is 74LS157, and IC116 is 74LS04, IC117 is 74LS00, IC118, IC121, IC122, IC126 is 74LS32, IC123, IC129 is 74LS74, and IC125 is 74LS166, IC127 is 74LS273, IC130, IC131 is 74LS08.

7, teletext adapter according to claim 1 is characterized in that setting up a general radio frequency output modulator in output when adopting the color television set of no AV input terminal.

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