CN107786824A - System occurs for the scanning signal based on improved row split circuit - Google Patents
System occurs for the scanning signal based on improved row split circuit Download PDFInfo
- Publication number
- CN107786824A CN107786824A CN201710964430.9A CN201710964430A CN107786824A CN 107786824 A CN107786824 A CN 107786824A CN 201710964430 A CN201710964430 A CN 201710964430A CN 107786824 A CN107786824 A CN 107786824A
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- circuit
- resistance
- processing module
- output processing
- electric capacity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/14—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
The invention discloses the scanning signal based on improved row split circuit to occur system, including Video Decoder, synchronizing separator circuit, brightness processed and chroma decoding circuit, final stage is depending on putting, kinescope, line scan signals generation circuit, field scan signal generating circuit, output processing module, distortion correction circuit, return transformer, deflection coil, Video Decoder, synchronizing separator circuit, brightness processed and chroma decoding circuit, final stage is depending on putting, kinescope is sequentially connected, synchronizing separator circuit is connected with Video Decoder, crystal oscillation and the row AFC circuit, line scan signals generation circuit, field scan signal generating circuit, output processing module is sequentially connected, the distortion correction circuit, return transformer, deflection coil is sequentially connected, output processing module is connected with distortion correction circuit.The present invention improves the stability of scanning system, required various senior middle school's low-voltages is also provided for other circuits by line scan signals generation circuit, output processing module.
Description
Technical field
The present invention relates to television scanning field, and in particular to the scanning signal based on improved row split circuit is
System.
Background technology
TV (Television, TV, Video) refers to the image frame and audio using electronic technology and equipment transmission activity
Signal, i.e. television receiver, and important broadcast and video communication instrument, television set is earliest by Britain engineer John Lip river
Lucky Baird is invented in nineteen twenty-five.The visual pattern of TV electronically transmission activity immediately.It is similar with film, TV profit
Show the rest image of a frame frame gradual change with the persistence of vision effect of human eye, form visual live image.Television system is sent out
It is order transmission after electric signal that each fine fraction of scenery is pressed brightness and chroma conversion by sending end.In receiving terminal by corresponding several
What position shows brightness and the colourity of each fine fraction to reappear view picture original image.The progress of science and technology, is that TV is rapid
One major reason of popularization.Various countries' TV signal scanning standard and channel broadband are incomplete same, are seeked advice from by international wireless electricity
The suggestion of the committee (CCIR) is distinguished with the Latin alphabet.The scanning system stability of existing television set is weaker, and output signal is held
It is also easy to produce snowflake.
The content of the invention
The technical problems to be solved by the invention are that the scanning system stability of existing television set is weaker, and output signal is easy
Snowflake is produced, and it is an object of the present invention to provide the scanning signal generation system based on improved row split circuit, improves the steady of scanning system
It is qualitative.
The present invention is achieved through the following technical solutions：
System occurs for scanning signal based on improved row split circuit, including Video Decoder, synchronizing separator circuit, bright
Degree processing and chroma decoding circuit, final stage are depending on putting, kinescope, crystal oscillation and row AFC circuit, line scan signals generation circuit,
Field scan signal generating circuit, output processing module, distortion correction circuit, recurrence transformer, deflection coil, the video decoding
Device, synchronizing separator circuit, brightness processed and chroma decoding circuit, final stage are depending on putting, kinescope is sequentially connected, the separated in synchronization electricity
Road is connected with Video Decoder, and crystal oscillation and the row AFC circuit, line scan signals generation circuit, field scan signal produce
Circuit, output processing module are sequentially connected, and the distortion correction circuit, recurrence transformer, deflection coil are sequentially connected, described defeated
Go out processing module to be connected with distortion correction circuit；The synchronizing separator circuit includes anti-jamming circuit, the amplitude point being sequentially connected
From circuit, synchronous amplifying circuit and APC circuits, the anti-jamming circuit is connected with Video Decoder；The APC circuits and crystal
Vibration connects with row AFC circuit.
Horizontal and vertical two groups of deflection coils are provided with the neck of kinescope, line output circuit carries for line deflector coil
For it is linear good, amplitude is enough, the accurate sawtooth current of frequency, vertical output circuit provides vertical scanning for field deflection coil
Sawtooth waveforms, make the scanning motion of electron beam progress both horizontally and vertically, meanwhile, scanning system provides row for kinescope, field disappears
Sound pulse signal, enter every trade field flyback return line, line-scan circuit provides line flyback pulse for PAL-system decoding circuit, controls PAL
Switch, produce the reference subcarrier of line-by-line inversion.Line flyback pulse also supplies synchronizing signals of the CPU as character, line flyback transformation
Device provides for display tube to be focused on pole tension and accelerates step voltage, and required various senior middle school's low-voltages are also provided for other circuits.
Further, system occurs for the scanning signal based on improved row split circuit, and the output processing module includes
Vertical triggers circuit, zig-zag are into circuit and output amplifier, and the vertical triggers circuit, zig-zag are into circuit and defeated
Go out amplifying circuit to be sequentially connected, the vertical triggers circuit is connected with field scan signal generating circuit, the output amplifier
It is connected with deflection coil.
Further, system occurs for the scanning signal based on improved row split circuit, and the deflection coil is wrapped in aobvious
On image tube.
Further, synchronizing separator circuit includes resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2, three
Pole pipe V2, resistance R1 one end are signal input part, and its other end is connected with triode V2 base stage, electric capacity C1 one end connection
On the circuit that resistance R1 is connected with triode V2, its other end ground connection；The resistance R2 mono- terminates 12V power supplys, its other end
It is connected with triode V2 emitter stage；The resistance R3 connects with electric capacity C2, and the one end at the resistance R3 connections electric capacity C2 ends connects
12V power supplys are connect, the other end at electric capacity C2 connection resistance R3 ends is connected on the circuit that resistance R2 is connected with triode V2；The electricity
Hinder R4 one end connecting triode V2 colelctor electrode, its other end ground connection；It is on the circuit that the resistance R4 is connected with triode V2
Signal output part.
Separated in synchronization transistor V2 emitter stage is (i.e. static in the case of no input signal added with RC timing circuits
When), V is in zero-bias, or in order to improve separation sensitivity more slightly forward bias.When the composite color television of positive polarity is believed
When number being added to through R1 in separated in synchronization transistor V2 base stage, the lock-out pulse part born in signal makes V2 turn on and be operated in put
Big state, the synchronization pulse being then amplified on V2 collector load resistor R4.When V2 is turned on, its base stage electricity
Direction is flowed as shown in solid arrow in figure.This electric current charges to electric capacity C2, and for the left negative right side just, charging voltage value is its charging polarity
e2.E2 size is almost equal with the peak value e1 of lock-out pulse.C2 charging voltage is individual equivalent to having added for V2 emitter junction
Reverse biased, so V2 cut-offs (because the amplitude of video signal portions is less than synchronizing signal amplitude) after synchronizing signal.
During V2 ends, C2 charging voltage will be discharged by resistance R2.Because R2 resistances are much larger than R3 resistance, institute
Very slow with the velocity of discharge, V2 is always maintained at cut-off state before next synchronous pulse arrival.C2 discharge current direction
As indicated by a dashed arrow in the figure.When next synchronous pulse arrives, the peak value of lock-out pulse turns on V2 again, and C2 is again
It is electrically charged.Said process goes round and begins again, i.e. V2 is the peak value arrival moment conducting in synchronizing signal, and after lock-out pulse
Cut-off, then obtains a succession of synchronization pulse in V2 colelctor electrode.This method is to utilize synchronizing signal and vision signal
This feature of amplitude difference isolates synchronizing signal, and we are called amplitude separation.
The present invention compared with prior art, has the following advantages and advantages：The present invention is produced by line scan signals
Raw circuit, field scan signal generating circuit, output processing module, improve the stability of scanning system, are also provided for other circuits
Required various senior middle school's low-voltages.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is synchronizing separator circuit of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As depicted in figs. 1 and 2, system occurs for the scanning signal based on improved row split circuit, it is characterised in that including
Video Decoder, synchronizing separator circuit, brightness processed and chroma decoding circuit, final stage are depending on putting, kinescope, crystal oscillation and row
AFC circuit, line scan signals generation circuit, field scan signal generating circuit, output processing module, distortion correction circuit, recurrence
Transformer, deflection coil, the Video Decoder, synchronizing separator circuit, brightness processed and chroma decoding circuit, final stage depending on putting,
Kinescope is sequentially connected, and the synchronizing separator circuit is connected with Video Decoder, and crystal oscillation and the row AFC circuit, row are swept
Retouch signal generating circuit, field scan signal generating circuit, output processing module to be sequentially connected, the distortion correction circuit, recurrence
Transformer, deflection coil are sequentially connected, and the output processing module is connected with distortion correction circuit；The synchronizing separator circuit bag
The anti-jamming circuit being sequentially connected, range separation circuit, synchronous amplifying circuit and APC circuits are included, the anti-jamming circuit is with regarding
Frequency decoder connects；The APC circuits are connected with crystal oscillation and row AFC circuit.The output processing module includes vertical touch
Power Generation Road, zig-zag are amplified into circuit and output amplifier, the vertical triggers circuit, zig-zag into circuit and output
Circuit is sequentially connected, and the vertical triggers circuit is connected with field scan signal generating circuit, the output amplifier and deflection
Coil connects.The deflection coil is wrapped on kinescope.
Synchronizing separator circuit includes resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2, triode V2, electricity
It is signal input part to hinder R1 one end, and its other end is connected with triode V2 base stage, and described electric capacity C1 one end is connected to resistance R1
On the circuit being connected with triode V2, its other end ground connection；The resistance R2 mono- terminates 12V power supplys, its other end and triode
V2 emitter stage connection；The resistance R3 connects with electric capacity C2, one end connection 12V electricity at the resistance R3 connections electric capacity C2 ends
Source, the other end at electric capacity C2 connection resistance R3 ends are connected on the circuit that resistance R2 is connected with triode V2；The resistance R4 mono-
Hold connecting triode V2 colelctor electrode, its other end ground connection；It is defeated for signal on the circuit that the resistance R4 is connected with triode V2
Go out end.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (4)
1. system occurs for the scanning signal based on improved row split circuit, it is characterised in that including Video Decoder, synchronization point
From circuit, brightness processed and chroma decoding circuit, final stage depending on putting, kinescope, crystal oscillation and row AFC circuit, line scan signals
Generation circuit, field scan signal generating circuit, output processing module, distortion correction circuit, recurrence transformer, deflection coil, institute
State Video Decoder, synchronizing separator circuit, brightness processed and chroma decoding circuit, final stage depending on putting, kinescope be sequentially connected, it is described
Synchronizing separator circuit is connected with Video Decoder, and crystal oscillation and the row AFC circuit, line scan signals generation circuit, field are swept
Retouch signal generating circuit, output processing module is sequentially connected, the distortion correction circuit, return transformer, deflection coil successively
Connection, the output processing module are connected with distortion correction circuit；The synchronizing separator circuit is anti-interference including being sequentially connected
Circuit, range separation circuit, synchronous amplifying circuit and APC circuits, the anti-jamming circuit are connected with Video Decoder；It is described
APC circuits are connected with crystal oscillation and row AFC circuit.
2. system occurs for the scanning signal according to claim 1 based on improved row split circuit, it is characterised in that institute
Stating output processing module includes vertical triggers circuit, zig-zag into circuit and output amplifier, the vertical triggers circuit,
Zig-zag is sequentially connected into circuit and output amplifier, and the vertical triggers circuit connects with field scan signal generating circuit
Connect, the output amplifier is connected with deflection coil.
3. system occurs for the scanning signal according to claim 1 based on improved row split circuit, it is characterised in that institute
Deflection coil is stated to be wrapped on kinescope.
4. system occurs for the scanning signal according to claim 1 based on improved row split circuit, it is characterised in that institute
Stating synchronizing separator circuit includes resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2, triode V2, resistance R1 mono-
Hold and be connected for signal input part, its other end with triode V2 base stage, described electric capacity C1 one end is connected to resistance R1 and three poles
On the circuit of pipe V2 connections, its other end ground connection；The resistance R2 mono- terminates 12V power supplys, the hair of its other end and triode V2
Emitter-base bandgap grading connects；The resistance R3 connects with electric capacity C2, one end connection 12V power supplys at the resistance R3 connections electric capacity C2 ends, electric capacity
The other end at C2 connection resistance R3 ends is connected on the circuit that resistance R2 is connected with triode V2；Resistance R4 one end connection three
Pole pipe V2 colelctor electrode, its other end ground connection；It is signal output part on the circuit that the resistance R4 is connected with triode V2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710964430.9A CN107786824A (en) | 2017-10-17 | 2017-10-17 | System occurs for the scanning signal based on improved row split circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710964430.9A CN107786824A (en) | 2017-10-17 | 2017-10-17 | System occurs for the scanning signal based on improved row split circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107786824A true CN107786824A (en) | 2018-03-09 |
Family
ID=61434564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710964430.9A Withdrawn CN107786824A (en) | 2017-10-17 | 2017-10-17 | System occurs for the scanning signal based on improved row split circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107786824A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114866679A (en) * | 2022-04-15 | 2022-08-05 | 武汉工程大学 | Vacuum camera tube control system based on FPGA (field programmable Gate array) in nuclear environment |
-
2017
- 2017-10-17 CN CN201710964430.9A patent/CN107786824A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114866679A (en) * | 2022-04-15 | 2022-08-05 | 武汉工程大学 | Vacuum camera tube control system based on FPGA (field programmable Gate array) in nuclear environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180309 |
|
| WW01 | Invention patent application withdrawn after publication |