CN210431375U - Switch control circuit for satellite portable station - Google Patents
Switch control circuit for satellite portable station Download PDFInfo
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- CN210431375U CN210431375U CN201921814298.4U CN201921814298U CN210431375U CN 210431375 U CN210431375 U CN 210431375U CN 201921814298 U CN201921814298 U CN 201921814298U CN 210431375 U CN210431375 U CN 210431375U
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Abstract
The utility model discloses an on-off control circuit for portable station of satellite, including shaping circuit, holding circuit and control circuit, shaping circuit includes schmitt trigger, schmitt trigger's input electricity connect switch detection circuitry, after the shaping is filtered to the switch analog signal of input, from schmitt trigger's output digital square wave signal, further as the clock signal input to the clock end of the D trigger in the holding circuit, the output that D trigger corresponds then the base of the control triode in the electricity connection control circuit, the grid of field effect transistor is further connected to the collecting electrode of control triode, the drain electrode and the external power source electricity of field effect transistor are connected, the source electrode of field effect transistor is the internal circuit power supply of portable station of satellite as on-off control circuit's output. The utility model discloses circuit structure is simple, the interference killing feature is strong, long service life.
Description
Technical Field
The utility model relates to a switch control field especially relates to an on-off control circuit for portable station of satellite.
Background
In the prior art, the circuit structure of the switch control circuit of the satellite portable station is complex, the complex circuit structure is inconvenient to manufacture and process, and a large amount of circuit devices are required to be purchased with high cost. And the existing satellite portable station switching circuit has poor anti-interference capability, large power consumption and short service life. Therefore, it is necessary to provide a switch control circuit with simple circuit structure, strong anti-interference capability and long service life to improve the switch control circuit in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a switch control circuit for portable station of satellite, solves the problem that circuit structure is complicated among the prior art, interference killing feature is poor, life is short.
In order to solve the above technical problems, the utility model adopts a technical solution of providing a switch control circuit for a satellite portable station, comprising a shaping circuit, a holding circuit and a control circuit, the shaping circuit comprises a Schmitt trigger, the input end of the Schmitt trigger is electrically connected with the switch detection circuit, after the input switch analog signal is shaped and filtered, a digital square wave signal is output from the output end of the Schmitt trigger and further input to the clock end of the D trigger in the holding circuit as a clock signal, the output end corresponding to the D trigger is electrically connected with the base electrode of a control triode in the control circuit, the collector of the control triode is further electrically connected with the grid of the field effect tube, the drain of the field effect tube is electrically connected with an external power supply, and the source electrode of the field effect transistor is used as an output power supply of the switch control circuit to supply power for an internal circuit of the satellite portable station.
Preferably, the schmitt trigger is a chip MC14584BDTR2G, the D trigger is a chip MC14013BDTR2G, and power supply terminals of the chips MC14584BDTR2G and MC14013BDTR2G are powered by batteries.
Preferably, the switch detection circuit include with the anodal first switch detection resistance who is connected of battery, the other end electricity of first switch detection resistance connects second switch detection resistance and inserts the first input of chip MC14584BDTR2G simultaneously, the first end of switch button is connected to the other end electricity of second switch detection resistance, the second end ground connection of switch button, the switch detection circuit still include with the first switch detection electric capacity that the first input electricity of chip MC14584BDTR2G is connected, first switch detection electric capacity other end ground connection, the second switch detection electric capacity that the first end electricity of switch button is connected, the second switch detection electric capacity other end ground connection.
Preferably, the control triode is a chip 9014, a first output terminal of the chip MC14584BDTR2G is electrically connected to the second input terminal, a corresponding second output terminal is electrically connected to a first clock terminal of the chip MC14013BDTR2G, and a corresponding first output terminal of the chip MC14013BDTR2G is electrically connected to the base of the chip 9014 after being electrically connected to the first current limiting resistor.
Preferably, the field effect transistor is a chip RFR5305, a drain of the chip RFR5305 is connected to an external power supply, a source of the chip RFR5305 is electrically connected to a cathode of a zener diode, an anode of the zener diode is connected to a first end of a second current-limiting resistor, a first end of the second current-limiting resistor is connected to a source of the chip RFR5305 after being connected to a third current-limiting resistor, a first end of the second current-limiting resistor is further connected to a gate of the chip RFR5305, a second end of the second current-limiting resistor is connected to a collector of the chip 9014, and an emitter of the chip 9014 is grounded.
Preferably, the external power supply is a direct current 19V power supply.
The utility model has the advantages that: the utility model discloses an on-off control circuit for portable station of satellite, including shaping circuit, holding circuit and control circuit, shaping circuit includes schmitt trigger, schmitt trigger's input electricity connect switch detection circuitry, after the shaping is filtered to the switch analog signal of input, from schmitt trigger's output digital square wave signal, further as the clock signal input to the clock end of the D trigger in the holding circuit, the output that D trigger corresponds then the base of the control triode in the electricity connection control circuit, the grid of field effect transistor is further connected to the collecting electrode of control triode, the drain electrode and the external power source electricity of field effect transistor are connected, the source electrode of field effect transistor is the internal circuit power supply of portable station of satellite as on-off control circuit's output. The utility model discloses circuit structure is simple, the interference killing feature is strong, long service life.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of a switch control circuit for a satellite portable station according to the present invention;
fig. 2 is a block diagram of a switch detection circuit, a shaping circuit, and a holding circuit according to an embodiment of the present invention;
fig. 3 is a block diagram of a control circuit for another embodiment of a switch control circuit for a satellite portable station according to the present invention;
fig. 4 is a state diagram of another embodiment of a switch control circuit for a satellite portable station according to the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the switch control circuit for the satellite portable station includes a shaping circuit 2, a holding circuit 3 and a control circuit 4, the shaping circuit 2 includes a schmitt trigger, an input end of the schmitt trigger is electrically connected to the switch detection circuit 1, an input switch analog signal is shaped and filtered, a digital square wave signal is output from an output end of the schmitt trigger and further input to a clock end of a D trigger in the holding circuit 3 as a clock signal, an output end corresponding to the D trigger is electrically connected to a base of a control triode in the control circuit 4, a collector of the control triode is further electrically connected to a gate of a field effect transistor, a drain of the field effect transistor is electrically connected to an external power supply 5, and a source of the field effect transistor is used as an output power supply of the switch control circuit to supply power to an internal circuit of the satellite portable station.
Specifically, referring to fig. 2, the schmitt trigger is a chip MC14584BDTR2G, the D trigger is a chip MC14013BDTR2G, and the power supply terminals Vdd of the chips MC14584BDTR2G and MC14013BDTR2G are all powered by batteries. A power supply end of the chip MC14584BDTR2G is electrically connected with the filter capacitor C25 and then is connected with one end of a grounding resistor R23, and the other end of the grounding resistor R23 is grounded; the power supply terminal of the MC14013BDTR2G is electrically connected with the filter capacitor C90 and then grounded.
The switch detection circuit comprises a first switch detection resistor R22 electrically connected with the positive electrode + VBAT of the battery, the other end of the first switch detection resistor R22 is electrically connected with a second switch detection resistor R20 and is simultaneously connected with a first input end I1 of a chip MC14584BDTR2G, the other end of the second switch detection resistor R20 is electrically connected with a first end of a switch key, the second end of the switch key is grounded, the switch detection circuit further comprises a first switch detection capacitor C24 electrically connected with a first input end I1 of the chip MC14584BDTR2G, the other end of the first switch detection capacitor C24 is grounded, the first end of the switch key is electrically connected with a second switch detection capacitor C86, and the other end of the second switch detection capacitor C86 is grounded. The other inputs (I4, I5, I6) of the chip MC14584BDTR2G are connected to ground.
With reference to fig. 2 and fig. 3, the control transistor is a chip 9014, a first output terminal O1 of the chip MC14584BDTR2G is electrically connected to a second input terminal I2, a corresponding second output terminal O2 is electrically connected to a first clock terminal CA of the chip MC14013BDTR2G, and a corresponding first output terminal QA of the chip MC14013BDTR2G is electrically connected to a first current-limiting resistor R30 and then connected to a base of the chip 9014.
The second output terminal of the chip MC14013BDTR2G is connected to the first data terminal DA, the first reset terminal RA of the chip MC14013BDTR2G is connected to the electrical connection point of the filter capacitor C25 and the ground resistor R23, and the first chip select terminal RA is grounded. The second clock terminal CB, the second reset terminal RB, the second data terminal DB, and the second chip select terminal SB are all grounded.
In fig. 3, the field effect transistor is a chip RFR5305, a drain of the chip RFR5305 is connected to an external power supply, and the external power supply is a direct current 19V power supply. The source of the chip RFR5305 is electrically connected with the cathode of a voltage stabilizing diode D13, the anode of a voltage stabilizing diode D13 is connected with the first end of a second current limiting resistor R21, the first end of a second current limiting resistor R21 is connected with the source of the chip RFR5305 after being connected with a third current limiting resistor R31, the first end of the second current limiting resistor R21 is further connected with the gate of the chip RFR5305, the second end of the second current limiting resistor R21 is connected with the collector of the chip 9014, and the emitter of the chip 9014 is grounded.
After the chip 9014 is turned on, the chip RFR5305 is controlled to be turned on, and the source of the chip RFR5305 provides POWER (+19V POWER supply) for internal circuits of the satellite portable station.
Fig. 4 is a timing diagram of the switch control circuit, in which the voltage waveform corresponding to the first input terminal of the chip MC14584BDTR2G is L1, the voltage waveform corresponding to the second output terminal is L2, and the waveform corresponding to the source of the chip RFR5305 is L3. In the voltage waveform L1 corresponding to the first input end of the chip MC14584BDTR2G, when the input voltage is lower than the negative threshold voltage VTAt the time, in the voltage waveform L2, the voltage output by the second output terminal of the chip MC14584BDTR2G is a low voltage; when the input voltage is higher than the forward threshold voltage VT+At this time, in the voltage waveform L2, the voltage output from the second output terminal of the chip MC14584BDTR2G is high.
In the figure, ① indicates a state before the switch key is pressed, ② indicates a state after the switch key is pressed, ③ indicates a state after the switch key is released, ④ indicates a satellite portable station on state, ⑤ indicates a state after the switch key, ⑥ indicates a state after the switch key is released, and ⑦ indicates a satellite portable station off state.
In the starting process: generating a continuously input analog signal through the process of pressing and releasing the key switch key, and inputting the continuously input analog signal to a first input end of a chip MC14584BDTR 2G; the chip MC14584BDTR2G outputs a stable square wave internally through a shaping circuit, and then the wave is inverted twice to the second output O2 of the chip MC14584BDTR2G for output (corresponding to the turn-on in the voltage waveform L2). The second output terminal O2 of the chip MC14584BDTR2G outputs a rising edge signal to the chip MC14013BDTR2G as a clock signal, and after the first clock terminal CA of the chip MC14013BDTR2G receives a rising edge of the clock signal generated by the chip MC14584BDTR2G, the output state changes in a flip-flop manner.
The QA level of the first output end of the chip MC14013BDTR2G is inverted once and is changed from original 0V to 9V to be sent to the base of the chip 9014, the chip 9014 is conducted, the chip RFR5305 is conducted after the chip 9014 is conducted, current flows through the drain-source electrode DS of the chip RFR5305, 19V direct-current voltage supplies power to an internal circuit of the satellite portable station, and the satellite portable station is started.
In the shutdown process: generating a continuously input analog signal through the process of pressing and releasing the key switch key, and inputting the continuously input analog signal to a first input end of a chip MC14584BDTR 2G; the chip MC14584BDTR2G outputs a stable square wave internally through a shaping circuit, and then inverts twice to the second output O2 of the chip MC14584BDTR2G for output (corresponding to the turn-off in the voltage waveform L2). The second output terminal O2 of the chip MC14584BDTR2G outputs a rising edge signal to the chip MC14013BDTR2G as a clock signal, and after the first clock terminal CA of the chip MC14013BDTR2G receives a rising edge of the pulse signal generated from the chip MC14584BDTR2G, the output state changes in a flip-flop manner. The first output end QA of the chip MC14013BDTR2G is turned over from the original 9V to 0V and is sent to the base electrode of the chip 9014, the chip 9014 is closed, then the chip RFR5305 is closed, the 19V direct current voltage does not supply power to the internal circuit of the satellite portable station any more, and the satellite portable station is closed.
Compared with the existing switch control circuit, the switch control circuit has stronger interference resistance and simple circuit structure, and can be manufactured by simple and cheap electronic components. And the switch control circuit only has a control function and can not pass high-power heavy current, and the working current of the satellite portable station is controlled by the switch control circuit to be connected with the field effect transistor, so that the service life of the satellite portable station switch control circuit is far longer than that of the traditional satellite portable station switch control circuit.
Therefore, the utility model discloses a switch control circuit for portable station of satellite, including shaping circuit, holding circuit and control circuit, shaping circuit includes schmitt trigger, schmitt trigger's input electricity connect switch detection circuitry, after the shaping is filtered to the switch analog signal of input, digital square wave signal is exported from schmitt trigger's output, further the clock end of the D trigger of clock signal input to holding circuit, the output that D trigger corresponds then the base of the control triode in the electricity connection control circuit, the grid of field effect transistor is further connected to the collecting electrode of control triode again, the drain electrode and the external power source electricity of field effect transistor are connected, the source electrode of field effect transistor is the internal circuit power supply of portable station of satellite as switch control circuit's output power source. The utility model discloses circuit structure is simple, the interference killing feature is strong, long service life.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.
Claims (6)
1. A switch control circuit for a satellite portable station, comprising a shaping circuit, a holding circuit and a control circuit, the shaping circuit comprises a Schmitt trigger, the input end of the Schmitt trigger is electrically connected with the switch detection circuit, after the input switch analog signal is shaped and filtered, a digital square wave signal is output from the output end of the Schmitt trigger and further input to the clock end of the D trigger in the holding circuit as a clock signal, the output end corresponding to the D trigger is electrically connected with the base electrode of a control triode in the control circuit, the collector of the control triode is further electrically connected with the grid of the field effect tube, the drain of the field effect tube is electrically connected with an external power supply, and the source electrode of the field effect transistor is used as an output power supply of the switch control circuit to supply power for an internal circuit of the satellite portable station.
2. The switch control circuit for a satellite portable station as claimed in claim 1, wherein the schmitt trigger is a chip MC14584BDTR2G, the D trigger is a chip MC14013BDTR2G, and power supply terminals of the chips MC14584BDTR2G and MC14013BDTR2G are both powered by a battery.
3. The switch control circuit for the satellite portable station as claimed in claim 2, wherein the switch detection circuit includes a first switch detection resistor electrically connected to the positive electrode of the battery, the other end of the first switch detection resistor is electrically connected to a second switch detection resistor and simultaneously connected to the first input terminal of the chip MC14584BDTR2G, the other end of the second switch detection resistor is electrically connected to the first end of the switch button, the second end of the switch button is grounded, the switch detection circuit further includes a first switch detection capacitor electrically connected to the first input terminal of the chip MC14584BDTR2G, the other end of the first switch detection capacitor is grounded, the first end of the switch button is electrically connected to the second switch detection capacitor, and the other end of the second switch detection capacitor is grounded.
4. The switch control circuit for the satellite portable station as claimed in claim 3, wherein the control transistor is a chip 9014, the first output terminal of the chip MC14584BDTR2G is electrically connected to the second input terminal, the corresponding second output terminal is electrically connected to the first clock terminal of the chip MC14013BDTR2G, and the corresponding first output terminal of the chip MC14013BDTR2G is electrically connected to the base of the chip 9014 after being electrically connected to the first current limiting resistor.
5. The switch control circuit for the satellite portable station as claimed in claim 4, wherein the field effect transistor is a chip RFR5305, a source of the chip RFR5305 is electrically connected to a cathode of a zener diode, an anode of the zener diode is connected to a first end of a second current limiting resistor, the first end of the second current limiting resistor is connected to a source of the chip RFR5305 after being connected to a third current limiting resistor, the first end of the second current limiting resistor is further connected to a gate of the chip RFR5305, a second end of the second current limiting resistor is connected to a collector of the chip 9014, and an emitter of the chip 9014 is grounded.
6. The switch control circuit for a satellite portable station according to claim 1, wherein the external power supply is a direct current 19V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921814298.4U CN210431375U (en) | 2019-10-25 | 2019-10-25 | Switch control circuit for satellite portable station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921814298.4U CN210431375U (en) | 2019-10-25 | 2019-10-25 | Switch control circuit for satellite portable station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210431375U true CN210431375U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921814298.4U Active CN210431375U (en) | 2019-10-25 | 2019-10-25 | Switch control circuit for satellite portable station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210431375U (en) |
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2019
- 2019-10-25 CN CN201921814298.4U patent/CN210431375U/en active Active
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