CN202395875U - Waveform driving circuit of remote sensing charge coupled device (CCD) camera - Google Patents
Waveform driving circuit of remote sensing charge coupled device (CCD) camera Download PDFInfo
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- CN202395875U CN202395875U CN 201120464894 CN201120464894U CN202395875U CN 202395875 U CN202395875 U CN 202395875U CN 201120464894 CN201120464894 CN 201120464894 CN 201120464894 U CN201120464894 U CN 201120464894U CN 202395875 U CN202395875 U CN 202395875U
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Abstract
The utility model discloses a waveform driving circuit of a remote sensing charge coupled device (CCD) camera. The waveform driving circuit comprises a signal input end, a driver, a resistor R1, a resistor R2, a capacitor C1 and a signal output end. The signal input end is connected to the signal output end through the driver, the resistor R1 and the resistor R2 sequentially. The common end of the resistor R2 and the signal output end is connected to a reference potential through the capacitor C1, wherein the resistor R2 and the capacitor C1 form a waveform circuit together. The RC (resistor-capacitor) time constant of the waveform circuit can be flexibly controlled by changing the magnitudes of the resistance and the capacitance in the waveform circuit, so that the ascending and descending time of driving signals can be changed, the phase relation among the driving signals is conveniently adjusted, and the quality of CCD output signals is improved.
Description
Technical field
The utility model relates to a kind of remote sensing CCD camera drive circuit.
Background technology
The electric charge of CCD device is under the effect of drive signal, to shift output, so CCD is very high to the rising and requirement fall time of drive signal.Drive signal high-low level conversion fast more, the charge transfer effciency of CCD (CET) is low more, so the rising of drive signal and fall time should be slow as much as possible, promptly drive signal needs waveformization.
In addition; Drive signal is faster to another mutually required time from a phase transfer than electric charge fall time; Will cause the ccd signal disperse to be overflowed, the same drive signal rise time is too fast will to cause the substrate bounce phenomenon, and this all can have a strong impact on the output image quality of CCD.
The utility model content
The technology of the utility model is dealt with problems and is: overcome the deficiency of prior art, provide a kind of and can effectively regulate drive signal rising and the remote sensing CCD camera waveform drive circuit of fall time.
The technical solution of the utility model is: remote sensing CCD camera waveform drive circuit comprises signal input part, driver, resistance R 1, resistance R 2, capacitor C 1 and signal output part; Signal input part is connected to the input of driver; Output end of driver is connected to an end of resistance R 1; One end of resistance R 1 is connected to an end of resistance R 2, and the other end of resistance R 2 is connected to an end of signal output part and capacitor C 1 simultaneously, and the other end of capacitor C 1 is connected to reference potential.
Described driver is the EL7156 chip for driving.
The utility model advantage compared with prior art is: but the rising and the fall time of the utility model remote sensing CCD camera waveform drive circuit flexible drive signal, and degree of regulation can reach picosecond.Size through resistance and electric capacity in the change waveform circuit; Can regulate the RC time constant of waveform circuit; Thereby change the rising of drive signal and the phase relation between fall time and each drive signal; The substrate bounce and the diffusing phenomenon that have suppressed CCD have improved the charge transfer effciency of CCD, can effectively improve the ccd image quality.
Description of drawings
Fig. 1 is the schematic diagram of the utility model remote sensing CCD camera waveform drive circuit.
Embodiment
As shown in Figure 1, the utility model remote sensing CCD camera waveform drive circuit comprises signal input part, driver, resistance R 1, resistance R 2, capacitor C 1 and signal output part.Signal input part is connected to signal output part through driver, resistance R 1, resistance R 2 successively.The common port of resistance R 2 and signal output part is connected to reference potential through capacitor C 1.Wherein, resistance R 2 and capacitor C 1 common formation waveform circuit.
During work; From the signal input part input drive signal, in rising and fall time that signal output part can record drive signal, the result judges according to the CCD dependence test; Increase drive signal if desired and rise and fall time, realize through increasing waveform circuit RC time constant; Reduce drive signal if desired and rise and fall time, realize through reducing waveform circuit RC time constant.The least unit of resistance is ohm, and the least unit of electric capacity is a pico farad, and the RC time constant is the product of resistance and electric capacity, and degree of regulation can reach picosecond.Resistance R 1 is a driver output impedance build-out resistor.
Driver can be selected the EL7156 chip for driving.
Need to prove; Because long Distance Transmission can cause the decay of signal energy; Therefore the waveform circuit should be placed near the CCD device drive pin, and is the shortest with the path that drives pin through the drive signal of waveform circuit like this, can improve the precision of drive signal.
The content of not doing to describe in detail in the utility model specification belongs to those skilled in the art's known technology.
Claims (2)
1. remote sensing CCD camera waveform drive circuit is characterized in that comprising: signal input part, driver, resistance R 1, resistance R 2, capacitor C 1 and signal output part; Signal input part is connected to the input of driver; Output end of driver is connected to an end of resistance R 1; One end of resistance R 1 is connected to an end of resistance R 2, and the other end of resistance R 2 is connected to an end of signal output part and capacitor C 1 simultaneously, and the other end of capacitor C 1 is connected to reference potential.
2. remote sensing CCD camera waveform drive circuit according to claim 1 is characterized in that: described driver is the EL7156 chip for driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120464894 CN202395875U (en) | 2011-11-22 | 2011-11-22 | Waveform driving circuit of remote sensing charge coupled device (CCD) camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120464894 CN202395875U (en) | 2011-11-22 | 2011-11-22 | Waveform driving circuit of remote sensing charge coupled device (CCD) camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202395875U true CN202395875U (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120464894 Expired - Lifetime CN202395875U (en) | 2011-11-22 | 2011-11-22 | Waveform driving circuit of remote sensing charge coupled device (CCD) camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202395875U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813109B (en) * | 2014-01-24 | 2017-01-04 | 北京空间机电研究所 | A kind of CCD camera focal plane two-way drive circuit |
| CN113259011A (en) * | 2021-03-30 | 2021-08-13 | 武汉英飞光创科技有限公司 | Compatible circuit for changing rising and falling time of output electric signal for optical module |
-
2011
- 2011-11-22 CN CN 201120464894 patent/CN202395875U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813109B (en) * | 2014-01-24 | 2017-01-04 | 北京空间机电研究所 | A kind of CCD camera focal plane two-way drive circuit |
| CN113259011A (en) * | 2021-03-30 | 2021-08-13 | 武汉英飞光创科技有限公司 | Compatible circuit for changing rising and falling time of output electric signal for optical module |
| CN113259011B (en) * | 2021-03-30 | 2022-09-02 | 武汉英飞光创科技有限公司 | Compatible circuit for changing rising and falling time of output electric signal for optical module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |