CN202394070U - Power supply soft switching circuit device for satellite navigation receiver - Google Patents
Power supply soft switching circuit device for satellite navigation receiver Download PDFInfo
- Publication number
- CN202394070U CN202394070U CN 201120455166 CN201120455166U CN202394070U CN 202394070 U CN202394070 U CN 202394070U CN 201120455166 CN201120455166 CN 201120455166 CN 201120455166 U CN201120455166 U CN 201120455166U CN 202394070 U CN202394070 U CN 202394070U
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- China
- Prior art keywords
- satellite navigation
- navigation receiver
- capacitor
- power
- germanium diode
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- Expired - Lifetime
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Abstract
The utility model relates to a power supply soft switching circuit device for a satellite navigation receiver, which comprises a soft key switch T1, a first adjustable resistor R1, a second adjustable resistor R2, a first fixed resistor R3, a second fixed resistor R4, a third fixed resistor R5, a first capacitor C1, a second capacitor C2, a first germanium diode V1, a second germanium diode V2, a third germanium diode V3 and a two-point distance contact pin X1. The circuit device disclosed by the utility model consists of discrete devices and replaces a complex power supply control chip, the complexity of the satellite navigation receiver is reduced, and the power supply soft switching circuit device is simple to implement and has low cost. Meanwhile, according to the utility model, an external power supply is conducted by a soft switching key; after the resistors divide the voltage, the receiver is powered by a satellite navigation receiver power supply chip; the adjustable resistors are used as the voltage division resistors for implementing the adjustability of the voltage; the voltage adjustable range is wide; and the low break-over voltage germanium diodes are used as diodes, so that the voltage drop is reduced and the power supply soft switching circuit device is more flexible and reliable.
Description
Technical field
The utility model belongs to the space flight communication technique field, particularly a kind of power switch circuit device that is applied in the satellite navigation receiver.
Background technology
Power switch circuit device in the satellite navigation receiver is the critical function that realization is controlled its power supply power supply.Present satellite navigation receiver power switch circuit device is the power supply control chip of application of complex a bit, but the special chip application is higher than complicacy and price, and this will increase the complicacy of satellite navigation receiver, increase financial cost simultaneously.
Other adopts hard switching directly to control power switch; Directly break-make satellite navigation receiver power supply; This method power supply power supply overshoot might cause certain injury to navigation neceiver hardware greatly; The satellite navigation receiver software that is moving simultaneously can't save routine and data; Might cause certain damage to satellite navigation receiver, so there is shortcoming too complicated, that cost is high, meeting cause damage to receiver in existing power switch circuit device this power supply is controlled of satellite navigation receiver in the better simply application.
The utility model content
The technology of the utility model is dealt with problems and is: overcome the weak point of prior art, a kind of simple in structure, low-cost, the supply power soft switch circuit arrangement that can effectively protect satellite navigation receiver is provided.
The technical solution of the utility model is: a kind of satellite navigation receiver supply power soft switch circuit arrangement comprises soft-key button switch T1, the first adjustable resistor R1, the second adjustable resistor R2, the first fixed resister R3, the second fixed resister R4, the 3rd fixed resister R5, the first capacitor C1, the second capacitor C2, the first germanium diode V1, the second germanium diode V2, the 3rd germanium diode V3 and distance between two points contact pin X1; Be connected satellite navigation receiver external power source VCC and the first adjustable resistor R1, one end S1 after soft-key button switch T1 and the distance between two points contact pin X1 parallel connection; The first adjustable resistor R1 and second adjustable resistor R2 series connection form dividing point S2; The first fixed resister R3 be connected to the S2 place after the 3rd germanium diode V3 connects; The 3rd germanium diode V3 negative pole EINT1 place connects the second capacitor C2 over the ground; Point S2 place is connected to soft switch circuit device output POWER_ON after through the first germanium diode V1 and controls the power supply chip Enable Pin; The parallelly connected over the ground second fixed resister R4 in POWER_ON place and the first capacitor C1, POWER_HOLD end are connected with the IO output pin of satellite navigation receiver central processing unit DSP, POWER_HOLD be connected to POWER_ON after the 3rd fixed resister R5 and the second germanium diode V2 connect and hold.
Said soft-key button switch T1 is the time 10ms soft-key button switch of upspringing.
The said first adjustable resistor R1 and the second adjustable resistor R2 are resistance adjustable extent 0 to 50K Ω, resistance accuracy 1%, the adjustable rheostat of rated power 0.15W.
The said first fixed resister R3, the second fixed resister R4 and the 3rd fixed resister R5 are resistance accuracy 5%, rated power 0.15W fixed resister.
The said first capacitor C1 and the second capacitor C2 select ceramic capacitor for use.
The said first capacitor C1 and the second capacitor C2 are the nonpolarity ceramic capacitor of work rated voltage 10V.
The said first germanium diode V1, the second germanium diode V2 and the 3rd germanium diode V3 are forward direction forward voltage 0.35V germanium diode.
Said distance between two points contact pin X1 is 2 2.54mm spacing contact pins.
The principle of work of the utility model is: when the soft switch circuit device powers on; Earlier enabling the satellite navigation receiver power supply chip through soft switch conduction VCC after by the adjustable resistor dividing potential drop is the receiver power supply; The back receiver central processing unit that powers on is provided with its IO pin and is output as high level; Keep the power supply chip Enable Pin with this IO pin, realize the normal power up of satellite navigation receiver.In the device over the ground shunt capacitance realize that button goes the function of shaking, can make satellite navigation receiver not influenced by the soft switch circuit device and be in power-up state all the time through short circuit contact pin X1 shielding soft switch circuit device, be convenient to the satellite navigation receiver debugging.
Soft switch circuit device Guan Dianshi; Monitoring the outside that is produced by soft switch by the interrupt handling routine of receiver central processing unit is long the interruption or short interruptions; Short interruptions is carried out receiver and is got into park mode then, and long interruption makes satellite navigation receiver get into shutdown mode, preserves data and program earlier; The output of IO pin is set to low level then, at this moment unclamps soft switch once more and just realizes the satellite navigation receiver power process.
The utility model compared with prior art has following advantage:
1. the satellite navigation receiver supply power soft switch circuit arrangement of the utility model is made up of discrete device, has substituted complicated power supply control chip, has reduced the complicacy of satellite navigation receiver, realizes that simply cost is low.
2. the utility model is through soft switch key conducting external power source; By enabling the satellite navigation receiver power supply chip after the resistor dividing potential drop is the receiver power supply; Voltage grading resistor adopts adjustable resistor to realize that voltage is adjustable; The voltage adjustable extent is wide, and diode adopts low forward voltage germanium diode to reduce voltage drop, more flexibility and reliability.
3. the soft switch circuit in the utility model is given the satellite navigation receiver central processing unit through interrupting EINT1, can monitor power supply status like this, before power cutoff, carries out the preservation of program and data, realizes the protection to software.Simultaneously, can realize debugging is convenient in soft switch shielding through contact pin.
4. the first capacitor C1 of the utility model and the second capacitor C2 select nonpolarity ceramic capacitor for use, make the entire circuit device performance stable, reliable.
Description of drawings
Fig. 1 is the circuit connection diagram of the utility model;
Fig. 2 is the utility model and satellite navigation receiver power supply chip and central processing unit connection layout.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
As shown in Figure 1; A kind of satellite navigation receiver supply power soft switch circuit arrangement of the utility model comprises soft-key button switch T1, the first adjustable resistor R1, the second adjustable resistor R2, the first fixed resister R3, the second fixed resister R4, the 3rd fixed resister R5, the first capacitor C1, the second capacitor C2, the first germanium diode V1, the second germanium diode V2, the 3rd germanium diode V3 and distance between two points contact pin X1.
Be connected satellite navigation receiver external power source VCC and the first adjustable resistor R1, one end S1 after soft-key button switch T1 and the distance between two points contact pin X1 parallel connection; The first adjustable resistor R1 and second adjustable resistor R2 series connection form dividing point S2; The first fixed resister R3 be connected to the S2 place after the 3rd germanium diode V3 connects; The 3rd germanium diode V3 negative pole EINT1 place connects the second capacitor C2 over the ground; Point S2 place is connected to soft switch circuit device output POWER_ON after through the first germanium diode V1 and controls the power supply chip Enable Pin; The parallelly connected over the ground second fixed resister R4 in POWER_ON place and the first capacitor C1, POWER_HOLD end are connected with the IO output pin of satellite navigation receiver central processing unit DSP, POWER_HOLD be connected to POWER_ON after the 3rd fixed resister R5 and the second germanium diode V2 connect and hold.
In the present embodiment, soft-key button switch T1 is the time 10ms soft-key button switch of upspringing; The first capacitor C1 and the second capacitor C2 select ceramic capacitor for use; Distance between two points contact pin X1 is 2 2.54mm spacing contact pins.
As shown in Figure 2, soft switch circuit device (part in the dashed rectangle) is connected with satellite navigation receiver power supply chip D1 (model LM3102MH) and central processing unit D2 (model TMS32C6414EGLZA6E3).
The satellite navigation receiver supply power soft switch circuit arrangement works of the utility model is divided into the process of working on power and makes process with the pass electrician.
In the satellite navigation receiver power up; The course of work of the utility model soft switch circuit device: when being prepared as satellite navigation receiver and powering up; Press the soft-key button switch T1 conducting externally fed VCC (voltage 10.8V) and the first adjustable resistance R1 conducting, S1 place, first adjustable resistance R1 upper end voltage is the charging that VCC (voltage 10.8V) at first accomplishes the first capacitor C1 and the second capacitor C2.
In the present embodiment, the first capacitor C1 value is the 1uF Leaded Ceramic Disc Capacitor, and the second capacitor C2 is the 50pF Leaded Ceramic Disc Capacitor.The C1 capacitance is bigger, and its existence can prevent that the shake of soft-key button switch T1 from enabling receiver power supply.The first adjustable resistor R1 and the second adjustable resistor R2 are connected on the S2 place and form dividing potential drop, because R1, the R2 resistance value is adjustable, can conveniently change S2 place magnitude of voltage.
In the present embodiment; Input voltage VCC is 10.8V; First regulates that adjustable resistor R1 resistance is adjusted to 33K Ω, the second adjustable resistor R2 resistance is adjusted to 15K Ω, makes that S2 place magnitude of voltage is 3.35V, deducts that to satisfy POWER_ON behind the first germanium diode V1 pressure drop 0.35V be the 3V high level; Guarantee to enable satellite navigation receiver power supply chip D1 (model LM3102MH), making the power supply chip operate as normal is the receiver power supply.
When calculating the first adjusting adjustable resistor R1 and the second adjustable resistor R2 dividing potential drop reference value, the existence of the sneak path of the considered first fixed resister R3 and the second fixed resister R4 is so the selection of the resistance of R1, R2 should be less than R3 and at least one order of magnitude of R4.Therefore, the first fixed resister R3 value is elected 100K Ω as, and the second fixed resister R4 value is elected 150K Ω as.
POWER_HOLD links to each other with the output IO pin of satellite navigation receiver central processing unit D2 (model TMS32C6414EGLZA6E3); To export the IO pin after receiver powers on and be made as high 3.3V; POWER_HOLD is set to high level 3.3V like this; Unclamping so that S1 and VCC (voltage 10.8V) break off behind the soft-key button switch T1, be low level because the existence of the first germanium diode V1 and the second germanium diode V2 makes S1 place, S2 place, but POWER_ON remains high level 3V by POWER_HOLD again; Guaranteeing to continue to enable power supply chip is the receiver power supply, realizes the normal power up of satellite navigation receiver.After powering on, can use short circuit with 2 short circuits of 2.54mm spacing contact pin X1, shielding soft switch circuit device makes satellite navigation receiver not influenced by the soft switch circuit device and is in power-up state all the time, is convenient to debugging.
Satellite navigation receiver closes in the electric process, the course of work of the utility model soft switch circuit device: monitor external interrupt EINT1 by the interrupt handling routine of its central processing unit after satellite navigation receiver powers on, when weak point is pressed soft-key button switch T1; External interrupt EINT1 becomes high level to be triggered central processing unit and interrupts, and interrupt routine begins counting and judges soft switch key length, when count value does not reach when 1 second time was set in advance; To judge to short and press soft-key button switch T1, and at this moment start the interrupt routine satellite navigation receiver and get into the sleep for electricity saving pattern, when the internal interrupt value in program counter reaches when 1 second time was set in advance; To judge and be the long soft-key button switch T1 that presses; At this moment start the interrupt routine satellite navigation receiver and get into shutdown mode, preserve data and program earlier, the POWER_HOLD pin is set to low level then; At this moment unclamp once more that S1 and VCC break off behind the soft-key button switch T1; After the first capacitor C1 accomplished through the second fixed resister R4 conductive discharge, be 4 seconds discharge time, and at this moment S1 place and POWER_HOLD are low level; POWER_ON realizes the satellite navigation receiver power process for low power cutoff chip.
Through the test, the output voltage width of the utility model from 0V to VCC-0.35V, the flexibility and reliability more of working.The interruption of the utility model realizes that successfully the satellite navigation receiver central processing unit to power state detection, realized the protection to software.Successfully having shielded soft switch through short circuit contact pin X1 debugs.The utility model has been realized constituting simple low cost supply power soft switch circuit arrangement by discrete device.
Certainly, under the situation that does not change its function, the equivalent transformation that carries out or substitute also falls into the protection domain of the utility model to each building block of the utility model, position relation and connected mode.
The undocumented technology of the utility model instructions belongs to techniques well known.
Claims (8)
1. a satellite navigation receiver supply power soft switch circuit arrangement is characterized in that: comprise soft-key button switch T1, the first adjustable resistor R1, the second adjustable resistor R2, the first fixed resister R3, the second fixed resister R4, the 3rd fixed resister R5, the first capacitor C1, the second capacitor C2, the first germanium diode V1, the second germanium diode V2, the 3rd germanium diode V3 and distance between two points contact pin X1; Be connected satellite navigation receiver external power source VCC and the first adjustable resistor R1, one end S1 after soft-key button switch T1 and the distance between two points contact pin X1 parallel connection; The first adjustable resistor R1 and second adjustable resistor R2 series connection form dividing point S2; The first fixed resister R3 be connected to the S2 place after the 3rd germanium diode V3 connects; The 3rd germanium diode V3 negative pole EINT1 place connects the second capacitor C2 over the ground; Point S2 place is connected to soft switch circuit device output POWER_ON after through the first germanium diode V1 and controls the power supply chip Enable Pin; The parallelly connected over the ground second fixed resister R4 in POWER_ON place and the first capacitor C1, POWER_HOLD end are connected with the IO output pin of satellite navigation receiver central processing unit DSP, POWER_HOLD be connected to POWER_ON after the 3rd fixed resister R5 and the second germanium diode V2 connect and hold.
2. according to a kind of satellite navigation receiver supply power soft switch circuit arrangement of claim 1, it is characterized in that: said soft-key button switch T1 is the time 10ms soft-key button switch of upspringing.
3. according to a kind of satellite navigation receiver supply power soft switch circuit arrangement of claim 1; It is characterized in that: the said first adjustable resistor R1 and the second adjustable resistor R2 are resistance adjustable extent 0 to 50K Ω; Resistance accuracy 1%, the adjustable rheostat of rated power 0.15W.
4. according to a kind of satellite navigation receiver supply power soft switch circuit arrangement of claim 1; It is characterized in that: the said first fixed resister R3, the second fixed resister R4 and the 3rd fixed resister R5 are resistance accuracy 5%, rated power 0.15W fixed resister.
5. according to a kind of satellite navigation receiver supply power soft switch circuit arrangement of claim 1, it is characterized in that: the said first capacitor C1 and the second capacitor C2 select ceramic capacitor for use.
6. according to a kind of satellite navigation receiver supply power soft switch circuit arrangement of claim 1, it is characterized in that: the said first capacitor C1 and the second capacitor C2 are the nonpolarity ceramic capacitor of work rated voltage 10V.
7. according to a kind of satellite navigation receiver supply power soft switch circuit arrangement of claim 1, it is characterized in that: the said first germanium diode V1, the second germanium diode V2 and the 3rd germanium diode V3 are forward direction forward voltage 0.35V germanium diode.
8. according to a kind of satellite navigation receiver supply power soft switch circuit arrangement of claim 1, it is characterized in that: said distance between two points contact pin X1 is 2 2.54mm spacing contact pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120455166 CN202394070U (en) | 2011-11-15 | 2011-11-15 | Power supply soft switching circuit device for satellite navigation receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120455166 CN202394070U (en) | 2011-11-15 | 2011-11-15 | Power supply soft switching circuit device for satellite navigation receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202394070U true CN202394070U (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120455166 Expired - Lifetime CN202394070U (en) | 2011-11-15 | 2011-11-15 | Power supply soft switching circuit device for satellite navigation receiver |
Country Status (1)
| Country | Link |
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| CN (1) | CN202394070U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8836367B2 (en) | 2012-07-23 | 2014-09-16 | Wistron Neweb Corporation | Signal transceiver and adaptive impedance switch circuit |
| US9071300B2 (en) | 2012-07-23 | 2015-06-30 | Wistron Neweb Corporation | Signal transceiver with enhanced return loss in power-off state |
| TWI497924B (en) * | 2013-08-06 | 2015-08-21 | Wistron Neweb Corp | Signal transceiver capable of enhancing return loss under power-off state |
| CN105785405A (en) * | 2014-12-26 | 2016-07-20 | 深圳艾科创新微电子有限公司 | Real-time clock circuit, navigation control chip, and navigation device |
| CN109660157A (en) * | 2018-11-30 | 2019-04-19 | 佛山市中格威电子有限公司 | A kind of direct current motor drive circuit |
| CN111103532A (en) * | 2019-12-13 | 2020-05-05 | 青岛海信智慧家居系统股份有限公司 | Method and device for detecting contact of intelligent key panel |
-
2011
- 2011-11-15 CN CN 201120455166 patent/CN202394070U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8836367B2 (en) | 2012-07-23 | 2014-09-16 | Wistron Neweb Corporation | Signal transceiver and adaptive impedance switch circuit |
| US9071300B2 (en) | 2012-07-23 | 2015-06-30 | Wistron Neweb Corporation | Signal transceiver with enhanced return loss in power-off state |
| TWI497924B (en) * | 2013-08-06 | 2015-08-21 | Wistron Neweb Corp | Signal transceiver capable of enhancing return loss under power-off state |
| CN105785405A (en) * | 2014-12-26 | 2016-07-20 | 深圳艾科创新微电子有限公司 | Real-time clock circuit, navigation control chip, and navigation device |
| CN105785405B (en) * | 2014-12-26 | 2020-09-01 | 深圳开阳电子股份有限公司 | Real-time clock circuit, navigation control chip and navigation device |
| CN109660157A (en) * | 2018-11-30 | 2019-04-19 | 佛山市中格威电子有限公司 | A kind of direct current motor drive circuit |
| CN111103532A (en) * | 2019-12-13 | 2020-05-05 | 青岛海信智慧家居系统股份有限公司 | Method and device for detecting contact of intelligent key panel |
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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 |