CN201360295Y - Ultra-long linear array CCD drive for spatial multi-spectral remote sensor - Google Patents
Ultra-long linear array CCD drive for spatial multi-spectral remote sensor Download PDFInfo
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- CN201360295Y CN201360295Y CNU2009201055400U CN200920105540U CN201360295Y CN 201360295 Y CN201360295 Y CN 201360295Y CN U2009201055400 U CNU2009201055400 U CN U2009201055400U CN 200920105540 U CN200920105540 U CN 200920105540U CN 201360295 Y CN201360295 Y CN 201360295Y
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Abstract
An ultra-long linear array CCD drive for spatial multi-spectral remote sensor comprises a CCD component, an analog drive circuit and a digital drive circuit. The analog drive circuit and the digital drive circuit are respectively distributed on two PCBs, the CCD component is distributed on any of the two PCBs and the two PCBs are superposed and connected through an inter-board connector for signal transmission. The ultra-long linear array CCD drive for spatial multi-spectral remote sensor can guarantee the phase matching of drive signal under high frequency.
Description
Technical field
The utility model relates to a kind of CCD driving element, particularly a kind of overlength line array CCD driver of space multi-spectral remote sensor.
Background technology
The CCD Driving technique is the normally key factor of imaging of space multi-spectral remote sensor CCD.For make CCD can outputting high quality, low noise picture signal, require the drive signal of input also must have extremely low noise, also require the strict coupling of phase place of each drive signal simultaneously.If the drive signal of input is through longer Distance Transmission, then its signal can be introduced much noise, causes signal quality to descend, and also contains much noise in the picture signal that finally causes the CCD device to be exported.Therefore, the afterbody drive circuit of each drive signal all needs to keep very near distance, placed adjacent with the CCD device.Yet, the analog drive signal of overlength line array CCD, digital drive signals One's name is legion, the shared printed circuit board area of drive circuit is bigger, whole drive circuits all can't be close to CCD places, important drive signal circuit next-door neighbour CCD can only be placed, the secondary circuit layout is far away slightly, as shown in Figure 1.This is fine under the lower situation of CCD operating frequency.But after the CCD operating frequency improved, this method for designing will cause the CCD output image to contain much noise, and circuit performance seriously descends, even the circuit function forfeiture.
In addition, the digital signal driving circuit of using in the existing CCD driver as shown in Figure 3, two analog line driver inputs in this circuit are independent separately, and the signal to input separately carries out power drive respectively, and output signal is only carried out impedance matching by earth resistance.Because the input signal of two analog line drivers is independent separately, sort circuit two analog line driver phase of output signal deviation ratios when practical application are bigger, reach more than the 3ns usually.This error will have a strong impact on the ccd signal quality after the operating frequency of CCD improves.Therefore must adopt new method for designing, solve the driving problems and the phase matched problem of overlength line array CCD under the high-frequency.
The utility model content
Technology of the present utility model is dealt with problems and is: overcome the deficiencies in the prior art, a kind of space multi-spectral remote sensor overlength line array CCD driver that can guarantee the drive signal phase matched under high-frequency is provided.
Technical solution of the present utility model is: space multi-spectral remote sensor overlength line array CCD driver, comprise the CCD device, analog drive circuit, the digital drive circuit, the voltage signal of outside input provides working power for the CCD device after analog drive circuit filtering dividing potential drop, the digital clock signal of outside input is delivered to CCD device drive CCD internal charge and is shifted after the digital drive circuit carries out impedance matching and power drive, described analog drive circuit and digital drive circuit are arranged on two PCB printed circuit boards, on CCD device arrangements any in described two PCB printed circuit boards, two PCB printed circuit board layer stack to put and connect by mother daughter board connector carries out the signal transmission.
Described mother daughter board connector is single contact pin, socket dock connector.
Spacing between described two PCB printed circuit boards is 10mm～15mm.
Described digital drive circuit comprises resistance R 41～R50, capacitor C 51 and C52 and first analog line driver and second analog line driver; Signal input part links to each other with the end of resistance R 41 and R44 simultaneously, the other end of resistance R 41 links to each other with the input of first analog line driver, the other end of resistance R 44 links to each other with the input of second analog line driver, the output of first analog line driver links to each other with first signal output part through resistance R 47, the output of second analog line driver links to each other with the secondary signal output through resistance R 49, the power end of first analog line driver, the power end of second analog line driver is connected with power supply VCC input simultaneously, the ground terminal of the ground terminal of first analog line driver and second analog line driver connects reference potential simultaneously, resistance R 42 is connected between the input of the power supply VCC input and first analog line driver, resistance R 43 is connected between the input and reference potential of first analog line driver, resistance R 45 is connected between the input of the power supply VCC input and second analog line driver, resistance R 46 is connected between the input and reference potential of second analog line driver, one end of resistance R 48 links to each other with first signal output part, the other end of resistance R 48 connects reference potential through capacitor C 51, one end of resistance R 50 links to each other with the secondary signal output, and the other end of resistance R 50 connects reference potential through capacitor C 52.
Described first analog line driver or second analog line driver are ICL7667.
The utility model advantage compared with prior art is: one, and the utility model is arranged in analog drive circuit and the digital drive circuit of CCD on two PCB circuit boards, can avoid the noise in the digital signal that analogue signal generating is influenced like this; Adopt electric connector to connect between its two, two PCB circuit boards, and two PCB circuit board spacings are between 10mm～15mm, can guarantee that like this digital drive signals transmission range is shorter, can not cause signal quality to descend; Its three, two analog line drivers in the digital drive circuit in the utility model adopt same input signal, can effectively guarantee two analog line driver phase of output signal unanimities like this.
Description of drawings
Fig. 1 is the structure principle chart of existing C CD driver;
Fig. 2 is the structure principle chart of the utility model CCD driver;
Fig. 3 is the schematic diagram of digital drive circuit in the existing C CD driver;
Fig. 4 is the schematic diagram of digital drive circuit in the utility model CCD driver.
Embodiment
As shown in Figure 2, the structure principle chart of the utility model space multi-spectral remote sensor overlength line array CCD driver.The utility model CCD driver adopts the hierarchy method for designing, comprises analog drive circuit and digital drive circuit.Analog drive circuit receives outside input power supply signal, through exporting to CCD after filtering, the dividing potential drop.The digital drive circuit receives the digital clock signal of outside input, and will output to CCD device drive CCD internal charge and shift after the power drive device drives with source signal respectively after terminal resistance carry out impedance matching.Analog drive circuit and digital drive circuit difference layout are on two PCB printed circuit boards.Two overlapping placements of PCB printed circuit board connect with single contact pin, female type mother daughter board connector between circuit board, are used to transmit drive signal.Mother daughter board connector next-door neighbour CCD device is placed, and has shortened the drive signal transmission range, makes the transmission range of whole drive signals of CCD all shorter, the long problem of part drive signal transmission range when having solved individual layer printed board design.The CCD device can be arranged in arbitrarily in two PCB printed circuit boards on any one.
Two PCB printed circuit distances between plates are between 10mm～15mm, distance can cause the components and parts of two PCB printed circuit board adjacent surfaces to bump less than 10mm, distance approximately 15mm can cause the digital drive signals transmission range long, and then causes that signal quality descends.
As shown in Figure 4, the schematic diagram of digital drive circuit in the utility model space multi-spectral remote sensor overlength line array CCD driver comprises signal input part 401, first signal output part 402, secondary signal output 403, power supply VCC input 404, resistance R 41, resistance R 42, resistance R 43, resistance R 44, resistance R 45, resistance R 46, resistance R 47, resistance R 48, resistance R 49, resistance R 50, capacitor C 51, capacitor C 52, first analog line driver 431, second analog line driver 432.Analog line driver in the utility model is selected the ICL7667 of maxim company for use.Because the CCD device needs the drive signal of two phase matched and imports simultaneously, for solving the problem of drive signal phase matched, the circuit of two signal input parts of Fig. 3 changed into a signal input part is only arranged, the signal of input is divided into two signals through resistance R 41, resistance R 44 respectively, and wherein the resistance of resistance R 41, resistance R 44 is between 10 Ω～100 Ω.Be divided into two resistance matching problem behind the signal in order to solve a signal, input at first analog line driver 431 has increased impedance matching resistance R 42 and resistance R 43, has increased impedance matching resistance R 45 and resistance R 46 at the input of second analog line driver 432.The resistance of resistance R 42, resistance R 43, resistance R 45, resistance R 46 is between 1K Ω～10K Ω.After the output signal process resistance R 47 (resistance is between 20 Ω～50 Ω) of first analog line driver 431, by 402 outputs of first signal output part.Between resistance R 48 (resistance is between 1K Ω～10K Ω) and circuit ground, increase capacitor C 51, thereby changed direct current coupling as shown in Figure 3 into the interchange coupling, can reduce the output power consumption of first analog line driver 431 like this.The output circuit principle of second analog line driver 432 is identical with first analog line driver 431.Because two power driver circuit principles are identical, and adopted the input signal of same signal input part 401, therefore first signal output part 402 mates with the phase of output signal of secondary signal output 403, and the coupling deviation is less than 1ns, well below the phase deviation 3ns of Fig. 3 circuit.
In the utility model specification not detailed description belong to this area professional and technical personnel's known technology.
Claims (5)
1, space multi-spectral remote sensor overlength line array CCD driver, comprise the CCD device, analog drive circuit, the digital drive circuit, the voltage signal of outside input provides working power for the CCD device after analog drive circuit filtering dividing potential drop, the digital clock signal of outside input is delivered to CCD device drive CCD internal charge and is shifted after the digital drive circuit carries out impedance matching and power drive, it is characterized in that: described analog drive circuit and digital drive circuit are arranged on two PCB printed circuit boards, on CCD device arrangements any in described two PCB printed circuit boards, two PCB printed circuit board layer stack to put and connect by mother daughter board connector carries out the signal transmission.
2, space multi-spectral remote sensor overlength line array CCD driver according to claim 1, it is characterized in that: described mother daughter board connector is single contact pin, socket dock connector.
3, space multi-spectral remote sensor overlength line array CCD driver according to claim 1 and 2, it is characterized in that: the spacing between described two PCB printed circuit boards is 10mm～15mm.
4, space multi-spectral remote sensor overlength line array CCD driver according to claim 3, it is characterized in that: described digital drive circuit comprises resistance R 41～R50, capacitor C 51 and C52 and first analog line driver (431) and second analog line driver (432); Signal input part (401) links to each other with the end of resistance R 41 and R44 simultaneously, the other end of resistance R 41 links to each other with the input of first analog line driver (431), the other end of resistance R 44 links to each other with the input of second analog line driver (432), the output of first analog line driver (431) links to each other with first signal output part (402) through resistance R 47, the output of second analog line driver (432) links to each other with secondary signal output (403) through resistance R 49, the power end of first analog line driver (431), the power end of second analog line driver (432) is connected with power supply VCC input (404) simultaneously, the ground terminal of the ground terminal of first analog line driver (431) and second analog line driver (432) connects reference potential simultaneously, resistance R 42 is connected between the input of power supply VCC input (404) and first analog line driver (431), resistance R 43 is connected between the input and reference potential of first analog line driver (431), resistance R 45 is connected between the input of power supply VCC input (404) and second analog line driver (432), resistance R 46 is connected between the input and reference potential of second analog line driver (432), one end of resistance R 48 links to each other with first signal output part (402), the other end of resistance R 48 connects reference potential through capacitor C 51, one end of resistance R 50 links to each other with secondary signal output (403), and the other end of resistance R 50 connects reference potential through capacitor C 52.
5, space multi-spectral remote sensor overlength line array CCD driver according to claim 4, it is characterized in that: described first analog line driver (431) or second analog line driver (432) are ICL7667.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201055400U CN201360295Y (en) | 2009-02-24 | 2009-02-24 | Ultra-long linear array CCD drive for spatial multi-spectral remote sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201055400U CN201360295Y (en) | 2009-02-24 | 2009-02-24 | Ultra-long linear array CCD drive for spatial multi-spectral remote sensor |
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| Publication Number | Publication Date |
|---|---|
| CN201360295Y true CN201360295Y (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201055400U Expired - Fee Related CN201360295Y (en) | 2009-02-24 | 2009-02-24 | Ultra-long linear array CCD drive for spatial multi-spectral remote sensor |
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| Country | Link |
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| CN (1) | CN201360295Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868499A (en) * | 2014-02-28 | 2014-06-18 | 北京空间机电研究所 | Intelligent optical remote sensing system |
| CN104545773A (en) * | 2015-01-06 | 2015-04-29 | 上海澳华光电内窥镜有限公司 | CCD electronic imaging device and endoscope thereof |
-
2009
- 2009-02-24 CN CNU2009201055400U patent/CN201360295Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868499A (en) * | 2014-02-28 | 2014-06-18 | 北京空间机电研究所 | Intelligent optical remote sensing system |
| CN103868499B (en) * | 2014-02-28 | 2015-12-09 | 北京空间机电研究所 | A kind of intelligent optical remote sensing system |
| CN104545773A (en) * | 2015-01-06 | 2015-04-29 | 上海澳华光电内窥镜有限公司 | CCD electronic imaging device and endoscope thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091209 Termination date: 20160224 |