CN203014989U - Remote sensing CCD camera power supply driving control circuit - Google Patents
Remote sensing CCD camera power supply driving control circuit Download PDFInfo
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- CN203014989U CN203014989U CN 201220680962 CN201220680962U CN203014989U CN 203014989 U CN203014989 U CN 203014989U CN 201220680962 CN201220680962 CN 201220680962 CN 201220680962 U CN201220680962 U CN 201220680962U CN 203014989 U CN203014989 U CN 203014989U
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Abstract
A remote sensing CCD camera power supply driving control circuit comprises a direct current bias resistor, a charging and discharging resistor, a charging and discharging capacitor, a current limiting diode, a PNP type crystal triode, a current limiting resistor, a Zener diode, a discharging resistor, and an N channel enhanced field effect transistor. The PNP type crystal triode is conducted through the instant conduction of the charging and discharging resistor after a power-on operation. The N channel enhanced field effect transistor is further conducted. A voltage output end is then low. When the charging and discharging capacitor is charged through the charging and discharging resistor, the PNP type crystal triode is broken. The N channel enhanced field effect transistor is cut off. The voltage output terminal is suspended. When the voltage output end is connected with the enabling end of a remote sensing DC/DC power supply module, the output of the DC/DC power supply module can be controlled. Compared with a conventional remote sensing CCD camera power supply driving control circuit, the circuit provided by the utility model has the advantages of fewer using devices, relatively insignificant introduction circuit interference, stability and reliability, etc.
Description
Technical field
The utility model relates to a kind of remote sensing CCD camera power driving control circuit.
Background technology
In remote sensing CCD camera; usually can use with the integrated DC/DC power module that enables control port and provide various working powers for camera circuitry; enable control end and can control powering on time of delay of DC/DC power module, many times do not use this control to bring in and realize upper electric delay.And in order to satisfy the upper electric delay between different electrical power in the remote sensing CCD camera circuit, normally used method is to add that on the input power bus of DC/DC electromagnetic relay carries out the control of delayed.Control the input terminal voltage of DC/DC power module by the open and close of relay, thereby control the output voltage of DC/DC.But the electromagnetic relay volume is excessive, and easily introduces noise in folding, therefore uses and inconvenience.
The utility model content
The technical problem that the utility model solves is: overcomes the deficiencies in the prior art, provides a kind of and can realize time-sharing power, and again can less components and parts usage quantity and the power driving control circuit that reduces the introducing circuit noise.
The technical solution of the utility model is: remote sensing CCD camera power driving control circuit comprises direct current biasing resistance R 1, discharges and recharges resistance R 2, charge and discharge capacitance C1, Current Limiting Diodes D1, positive-negative-positive transistor Q1, current-limiting resistance R3, voltage stabilizing didoe D2, discharge resistance R4, N channel enhancement field effect transistor Q2; One end of the anode of Current Limiting Diodes D1 and direct current biasing resistance R 1 is connected to positive supply VCC simultaneously; The other end of direct current biasing resistance R 1 is connected to simultaneously the base stage of positive-negative-positive transistor Q1 and discharges and recharges an end of resistance R 2, and the other end that discharges and recharges resistance R 2 is connected to the end of charge and discharge capacitance C1, the other end ground connection of charge and discharge capacitance C1; The negative terminal of Current Limiting Diodes D1 is connected to the emitter of positive-negative-positive transistor Q1; The collector electrode of positive-negative-positive transistor Q1 is connected to the end of current-limiting resistance R3, and the other end of current-limiting resistance R3 is connected to the negative terminal of voltage stabilizing didoe D2, the end of discharge resistance R4 and the grid of N channel enhancement field effect transistor Q2 simultaneously; The source electrode of the other end of the anode of voltage stabilizing didoe D2, discharge resistance R4 and N channel enhancement field effect transistor Q2 is ground connection simultaneously; The drain electrode of N channel enhancement field effect transistor Q2 is as the output of remote sensing CCD camera power driving control circuit.
The voltage stabilizing value of described voltage stabilizing didoe D2 is between the saturation conduction magnitude of voltage and positive supply VCC magnitude of voltage of N channel enhancement field effect transistor Q2.
Described charge and discharge capacitance C1 is non-polar electric capacity or the electric capacity that polarity is arranged.
The utility model advantage compared with prior art is: the components and parts that remote sensing CCD camera power driving control circuit uses are simple, thereby reduced the scale of circuit; The connection of circuit and control are simple in addition, the size that discharges and recharges resistance R 2 and charge and discharge capacitance C1 by adjusting namely can be regulated the length of delayed, this control circuit can effectively disconnect and contacting between the DC/DC power module controlled in the rear end after time-delay is completed, thus the less noise of introducing circuit.When using a plurality of DC/DC power module in the remote sensing CCD camera circuit, can connect in the Enable Pin of each DC/DC power module the Drive and Control Circuit of different R2 and C1 value, realize the time-sharing power between power supply, satisfied the time-sharing power requirement between different electrical power in the remote sensing CCD camera circuit.
Description of drawings
Fig. 1 is remote sensing CCD camera power driving control circuit diagram of the present utility model;
Fig. 2 is remote sensing CCD camera power driving control circuit of the present utility model and the connection diagram of being controlled the DC/DC module.
Embodiment
As shown in Figure 1, the utility model remote sensing CCD camera power driving control circuit comprises direct current biasing resistance R 1, discharges and recharges resistance R 2, charge and discharge capacitance C1, Current Limiting Diodes D1, positive-negative-positive transistor Q1, current-limiting resistance R3, voltage stabilizing didoe D2, discharge resistance R4, N channel enhancement field effect transistor Q2; One end of the anode of Current Limiting Diodes D1 and direct current biasing resistance R 1 is connected to positive supply VCC simultaneously; The other end of direct current biasing resistance R 1 is connected to simultaneously the base stage of positive-negative-positive transistor Q1 and discharges and recharges an end of resistance R 2, and the other end that discharges and recharges resistance R 2 is connected to the end of charge and discharge capacitance C1, the other end ground connection of charge and discharge capacitance C1; The negative terminal of Current Limiting Diodes D1 is connected to the emitter of positive-negative-positive transistor Q1; The collector electrode of positive-negative-positive transistor Q1 is connected to the end of current-limiting resistance R3, and the other end of current-limiting resistance R3 is connected to the negative terminal of voltage stabilizing didoe D2, the end of discharge resistance R4 and the grid of N channel enhancement field effect transistor Q2 simultaneously; The source electrode of the other end of the anode of voltage stabilizing didoe D2, discharge resistance R4 and N channel enhancement field effect transistor Q2 is ground connection simultaneously; The drain electrode of N channel enhancement field effect transistor Q2 is as the output of remote sensing CCD camera power driving control circuit.
As shown in Figure 2, the utility model remote sensing CCD camera power driving control circuit is connected the drain electrode of N channel enhancement field effect transistor Q2 in use with the Enable Pin of being controlled the DC/DC power module, when the positive supply VCC in circuit powers, the drain electrode of N channel enhancement field effect transistor Q2 is low, the Enable Pin of DC/DC power module is low, thus the not output of DC/DC power module.Along with the charging of C1 is completed gradually, N channel enhancement field effect transistor Q2 cut-off, N channel enhancement field effect transistor Q2 drain electrode is output as height, and the Enable Pin of DC/DC power module is high, thus DC/DC power module output voltage.
Due to the effect of the utility model remote sensing CCD camera power driving control circuit, the time difference that powers on the output of DC/DC power module from power supply VCC has increased a period of time, and this section timing definition is t time of delay.
Time of delay t and power supply VCC voltage, positive-negative-positive transistor Q1 base voltage, discharge and recharge resistance R 2 sizes, charge and discharge capacitance C1 size, discharge and recharge and have following relation on resistance R 2 between voltage drop:
Wherein R is equivalent resistance between the base stage of power supply VCC and triode Q1, has following relation between R and direct current biasing resistance R 1, Current Limiting Diodes D1, positive-negative-positive transistor Q1:
The resistance of R
In actual applications direct current biasing resistance R 1, discharge and recharge the value of resistance R 2, current-limiting resistance R3 and discharge resistance R4 all several kilohms of levels.Because internal resistance value between diode D1 conducting internal resistance value, triode Q1 base stage and emitter is all less, thus the impact of direct current biasing resistance R 1 can be ignored when Practical Calculation t time of delay, that is:
Internal resistance value between the resistance ≈ diode D1 conducting internal resistance value of R+three extreme Q1 base stages and emitter;
Same:
The resistance of the resistance ≈ resistance R 2 of resistance+resistance R 2 of R;
There are following relation in triode Q1 base voltage value and power supply VCC voltage, diode D1 forward conduction voltage between conducting voltage between triode Q1 emitter and base stage:
Triode Q1 base voltage value
=power supply VCC magnitude of voltage-diode D1 forward conduction magnitude of voltage
Turn-on voltage between-triode Q1 emitter and base stage;
For diode and the triode of silicon materials, diode D1 forward conduction magnitude of voltage ≈ 0.7V, turn-on voltage ≈ 0.7V between triode Q1 emitter and base stage.
Therefore time of delay t with power supply VCC voltage, positive-negative-positive transistor Q1 base voltage, discharge and recharge resistance R 2 sizes, charge and discharge capacitance C1 size, put the calculated relationship that discharge resistance R2 goes up between voltage drop and can be simplified to following formula:
Can find out from above-mentioned formula, when supply voltage VCC magnitude of voltage fixedly the time, t time of delay of described remote sensing CCD camera power driving control circuit is mainly determined by the size that discharges and recharges resistance R 2 and charge and discharge capacitance C1, when the value that discharges and recharges resistance R 2 * discharge and recharge resistance C1 is larger, delay time longer, when discharging and recharging resistance R 2 * discharge and recharge resistance C1 hour, delay time shorter.
The unspecified part of the utility model belongs to general knowledge as well known to those skilled in the art.
Claims (3)
1. remote sensing CCD camera power driving control circuit is characterized in that: comprise direct current biasing resistance R 1, discharge and recharge resistance R 2, charge and discharge capacitance C1, Current Limiting Diodes D1, positive-negative-positive transistor Q1, current-limiting resistance R3, voltage stabilizing didoe D2, discharge resistance R4, N channel enhancement field effect transistor Q2; One end of the anode of Current Limiting Diodes D1 and direct current biasing resistance R 1 is connected to positive supply VCC simultaneously; The other end of direct current biasing resistance R 1 is connected to simultaneously the base stage of positive-negative-positive transistor Q1 and discharges and recharges an end of resistance R 2, and the other end that discharges and recharges resistance R 2 is connected to the end of charge and discharge capacitance C1, the other end ground connection of charge and discharge capacitance C1; The negative terminal of Current Limiting Diodes D1 is connected to the emitter of positive-negative-positive transistor Q1; The collector electrode of positive-negative-positive transistor Q1 is connected to the end of current-limiting resistance R3, and the other end of current-limiting resistance R3 is connected to the negative terminal of voltage stabilizing didoe D2, the end of discharge resistance R4 and the grid of N channel enhancement field effect transistor Q2 simultaneously; The source electrode of the other end of the anode of voltage stabilizing didoe D2, discharge resistance R4 and N channel enhancement field effect transistor Q2 is ground connection simultaneously; The drain electrode of N channel enhancement field effect transistor Q2 is as the output of remote sensing CCD camera power driving control circuit.
2. remote sensing CCD camera power driving control circuit according to claim 1, it is characterized in that: the voltage stabilizing value of described voltage stabilizing didoe D2 is between the saturation conduction magnitude of voltage and positive supply VCC magnitude of voltage of N channel enhancement field effect transistor Q2.
3. remote sensing CCD camera power driving control circuit according to claim 1, it is characterized in that: described charge and discharge capacitance C1 is non-polar electric capacity or the electric capacity that polarity is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220680962 CN203014989U (en) | 2012-12-06 | 2012-12-06 | Remote sensing CCD camera power supply driving control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220680962 CN203014989U (en) | 2012-12-06 | 2012-12-06 | Remote sensing CCD camera power supply driving control circuit |
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| Publication Number | Publication Date |
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| CN203014989U true CN203014989U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220680962 Expired - Lifetime CN203014989U (en) | 2012-12-06 | 2012-12-06 | Remote sensing CCD camera power supply driving control circuit |
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| CN (1) | CN203014989U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038709A (en) * | 2014-06-06 | 2014-09-10 | 中国科学院长春光学精密机械与物理研究所 | TDICCD high-speed driving circuit |
| CN107070225A (en) * | 2017-06-07 | 2017-08-18 | 上海乐野网络科技有限公司 | A kind of negative-feedback discrete power circuit |
| CN111129984A (en) * | 2019-12-23 | 2020-05-08 | 广州市科士达电源设备有限公司 | Multifunctional power distribution box |
| CN112769185A (en) * | 2020-12-31 | 2021-05-07 | 李砚泉 | Battery pack charge and discharge control device, control method and battery device |
-
2012
- 2012-12-06 CN CN 201220680962 patent/CN203014989U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038709A (en) * | 2014-06-06 | 2014-09-10 | 中国科学院长春光学精密机械与物理研究所 | TDICCD high-speed driving circuit |
| CN107070225A (en) * | 2017-06-07 | 2017-08-18 | 上海乐野网络科技有限公司 | A kind of negative-feedback discrete power circuit |
| CN111129984A (en) * | 2019-12-23 | 2020-05-08 | 广州市科士达电源设备有限公司 | Multifunctional power distribution box |
| CN112769185A (en) * | 2020-12-31 | 2021-05-07 | 李砚泉 | Battery pack charge and discharge control device, control method and battery device |
| CN112769185B (en) * | 2020-12-31 | 2023-02-03 | 李砚泉 | Battery pack charging and discharging control device, control method and battery device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |
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| CX01 | Expiry of patent term |