CN202995310U - Discrete signal control circuit and airplane electronic device - Google Patents
Discrete signal control circuit and airplane electronic device Download PDFInfo
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- CN202995310U CN202995310U CN 201220609570 CN201220609570U CN202995310U CN 202995310 U CN202995310 U CN 202995310U CN 201220609570 CN201220609570 CN 201220609570 CN 201220609570 U CN201220609570 U CN 201220609570U CN 202995310 U CN202995310 U CN 202995310U
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Abstract
The utility model is suitable for the field of technical aeronautics and provides a discrete signal control circuit. The discrete control circuit is connected with a GPIO (General Purpose Input/output) terminal of an integrated circuit. The discrete signal control circuit includes a level switch module realizing level switch and preventing current from reverse input and an anti-phase amplifying device enhancing current driving capacity. Finally, the realization of driving requires devices with different discrete input levels, so that abnormities caused by different working voltage of devices and components connected mutually are avoided. Besides, the utility model also provides an airplane electronic device including the above discrete signal control circuit.
Description
Technical field
The utility model belongs to the aeronautical technology field, relates in particular to a kind of discrete signal control circuit and air electronics.
Background technology
Between electronic equipment or the components and parts of device interior interconnect in the process of transmitting discrete signal; the different phenomenon of connection two ends level that two equipment or the components and parts of interconnection occur sometimes; if the signal between two equipment or components and parts is not dealt with and direct interconnection control; often can cause the property abnormality of equipment, or even equipment or the damage of its inner components and parts.
The utility model content
The purpose of the utility model embodiment is to provide a kind of discrete signal control circuit that can realize level conversion, the connection two ends level that is intended to solve two equipment of interconnection or components and parts is different, the property abnormality that can cause equipment, the problem of equipment or components and parts damage.
The utility model embodiment is achieved in that a kind of discrete signal control circuit, is connected with the GPIO end of integrated circuit, and described discrete signal control circuit comprises:
Cold end is connected with described GPIO end the level switch module of realizing level conversion and preventing current flowing backwards;
Input end is electrically connected to the anti-phase device with described conversion level counter-rotating later with the hot end of described level switch module;
Input end is connected with the output terminal of described anti-phase device and described counter-rotating level is later reversed again and strengthen the inverting amplifier spare of driving force, and the output terminal output of described inverting amplifier spare drives discrete signal; And
First end simultaneously with the pull-up resistor R1 that cold end is connected, the second end is connected with the first power supply of described GPIO end and described level switch module.
Further, described level switch module comprises having N-channel MOS pipe Q1 and the pull-up resistor R2 that function is filled with in counnter attack, wherein,
The source electrode of described N-channel MOS pipe Q1 is as the cold end of described level switch module, the grid of described N-channel MOS pipe Q1 is connected with described the first power supply, the drain electrode of described N-channel MOS pipe Q1 is as the hot end of described level switch module and be connected with the first end of described pull-up resistor R2, and the second source that the second end of described pull-up resistor R2 and supply voltage are larger than described the first power supply is connected.
Further, described level switch module comprises N-type triode Q2, diode D1 and pull-up resistor R2, wherein,
The collector of described N-type triode Q2 as the cold end of described level switch module and with the anodic bonding of described diode D1, the base stage of described N-type triode Q2 is connected with described the first power supply, the emitter of described N-type triode Q2 as the hot end of described level switch module and simultaneously with the first end of described pull-up resistor R2 be connected the negative electrode of diode D1 and be connected, the second source that the second end of described pull-up resistor R2 and supply voltage are larger than described the first power supply is connected.
Further, described anti-phase device is phase inverter, described inverting amplifier spare is Darlington transistor, a plurality of input ends of described phase inverter are connected with the hot end of described level switch module simultaneously, a plurality of output terminals of described phase inverter and the corresponding connection of a plurality of input ends of described Darlington transistor, a plurality of output terminals of described Darlington transistor are exported respectively described driving discrete signal.
Further, described discrete signal control circuit comprises that also a plurality of reservations select resistance R 3, described a plurality of reservations select resistance R 3 be connected in turn described phase inverter a plurality of input ends and and the corresponding a plurality of output terminals of described a plurality of input end between.
Further, described discrete signal control circuit also comprises the resettable fuse F1 that is connected with the output terminal of described inverting amplifier spare.
Further, described discrete signal control circuit also comprises current-limiting resistance R4 and three terminal capacitor C1, the first end of the first end of described current-limiting resistance R4 and three terminal capacitor C1 is electrically connected to the output terminal of described inverting amplifier spare, the earth terminal ground connection of described three terminal capacitor C1, the second end of described current-limiting resistance R4 or the second end of three terminal capacitor C1 are as the output terminal of described discrete signal control circuit.
Further, described discrete signal control circuit also comprises stabilivolt D2, and the negative electrode of described stabilivolt D2 is connected that the second end is connected, plus earth simultaneously with three terminal capacitor C1 with the second end of described current-limiting resistance R4.
Further, described discrete signal control circuit also comprises protection capacitor C 2, and the first end of described protection capacitor C 2 is connected with the hot end of described level switch module, the second end ground connection.
Another purpose of the present utility model is to provide a kind of air electronics, and it comprises above-mentioned discrete signal control circuit.
Above-mentioned discrete signal control circuit is received and is connect and realize that by level switch module level conversion draws high level, thereafter the level after changing by anti-phase device is realized phase reversal 180 degree, at last by inverting amplifier spare will reverse later level reverse again and strengthen current driving ability after output drive discrete signal to next equipment or components and parts, the equipment that realize to drive needs different discrete incoming levels, the operating voltage of having avoided the equipment of interconnection or components and parts different and cause abnormal.
Description of drawings
Fig. 1 is the discrete signal control circuit module map that the utility model embodiment provides;
Fig. 2 is the schematic diagram of the discrete signal control circuit that provides of first embodiment of the utility model;
Fig. 3 is the schematic diagram of the discrete signal control circuit that provides of second embodiment of the utility model.
Embodiment
In order to make the technical problems to be solved in the utility model, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the discrete signal control circuit module map that provides for the utility model embodiment.The GPIO(General Purpose Input/Output of discrete signal control circuit and integrated circuit, universal input output) end is connected, and the discrete signal control circuit comprises pull-up resistor R1, level switch module 100, anti-phase device 200 and inverting amplifier spare 300.The cold end of level switch module 100 is connected with the GPIO of integrated circuit end to be realized level conversion and prevents current flowing backwards; The input end of anti-phase device 200 is electrically connected to the level counter-rotating that will change later with the hot end of level switch module 100; The input end of inverting amplifier spare 300 is connected with the output terminal of anti-phase device 200 and the level later that will reverse reverses again and strengthen driving force, and the output terminal of inverting amplifier spare 300 (being the output terminal CIDS_PAOUT of discrete signal control circuit) output drives discrete signal; The first end of pull-up resistor R1 is connected with the cold end of GPIO end and level switch module 100 simultaneously, the second end is connected with the first power Vcc 1.
above-mentioned discrete signal control circuit is received the level that connects and pass through the discrete signal of pull-up resistor R1 lifting integrated circuit output, then realize that by having the level switch module 100 that prevents the current flowing backwards function level conversion draws high level, thereafter the level after changing by 200 of phase inverters is realized phase reversal 180 degree, at last by 300 of inverting amplifiers will reverse later level reverse again and strengthen current driving ability after output drive discrete signal to next equipment or components and parts, realize driving the equipment that needs different discrete incoming levels, the operating voltage of having avoided the equipment of interconnection or components and parts different and cause abnormal.
As shown in Figure 2, in preferred embodiment, level switch module 100 comprises having N-channel MOS pipe Q1 and the pull-up resistor R2 that function is filled with in counnter attack.
The source electrode of N-channel MOS pipe Q1 is as the cold end of level switch module 100, the grid of N-channel MOS pipe Q1 is connected with the first power Vcc 1, the drain electrode of N-channel MOS pipe Q1 is as the hot end of level switch module 100 and be connected with the first end of pull-up resistor R2, and the second source Vcc2 that the second end of pull-up resistor R2 and supply voltage are larger than the first power Vcc 1 is connected.In the present embodiment, the N-channel MOS pipe anti-metal-oxide-semiconductor of filling with diode of setting up defences in being, the first power Vcc 1 voltage is 3.3V, second source voltage is 5V.In other embodiments, the first power Vcc 1 voltage is according to the design of N-channel MOS pipe Q1 gate-on voltage, and what need maintenance is that second source Vcc2 supply voltage is larger than the first power Vcc 1.When discrete signal is high level, not conducting of N-channel MOS pipe Q1, discrete signal is filled with by counnter attack the first end that diode is input to pull-up resistor R2 and is made level be converted, and the input end of anti-phase device 200 is high level; When discrete signal is low level, N-channel MOS pipe Q1 conducting, pull-up resistor R2 ground connection, the input end of anti-phase device 200 is low level.
As shown in Figure 3, in another preferred embodiment, level switch module 100 comprises N-type triode Q2, diode D1 and pull-up resistor R2.
The collector of N-type triode Q2 as the cold end of level switch module 100 and with the anodic bonding of diode D1, the base stage of N-type triode Q2 is connected with the first power Vcc 1, the emitter of N-type triode Q2 is as the hot end of level switch module 100 and be connected negative electrode with diode D1 with the first end of pull-up resistor R2 simultaneously and be connected, and the second source Vcc2 that the second end of pull-up resistor R2 and supply voltage are larger than the first power Vcc 1 is connected.In the present embodiment, in the anti-metal-oxide-semiconductor of filling with diode of setting up defences replaced by N-type triode Q2 and diode D1.And the voltage of the first power Vcc 1 is according to the turn-on condition setting of triode Q2.When discrete signal is high level, not conducting of N-type triode Q2, discrete signal makes level be converted by the first end that diode D1 is input to pull-up resistor R2, and the input end of anti-phase device 200 is high level; When discrete signal is low level, N-type triode Q2 conducting, pull-up resistor R2 ground connection, the input end of anti-phase device 200 is low level.
as shown in Figure 2, in a preferred embodiment, anti-phase device 200 is phase inverter U20, inverting amplifier spare 300 is Darlington transistor U25, a plurality of input ends of phase inverter U20 are (with reference to Fig. 2, A0 shown in 3 ... A5) be connected with the hot end of level switch module 100 simultaneously, a plurality of output terminals of phase inverter U20 are (with reference to Fig. 2, B0 shown in 3 ... B5) with a plurality of input ends of Darlington transistor U25 (with reference to Fig. 2, I0 shown in 3 ... I7) the corresponding connection, a plurality of output terminals of Darlington transistor U25 are (with reference to Fig. 2, O0 shown in 3 ... O7) output drives discrete signal.In the present embodiment, phase inverter U20's is that model is 74ACTQ024SC, and the model of Darlington transistor U25 is MC1413BDR2G, and in other embodiments, phase inverter U20 and Darlington transistor U25 can be respectively the close phase inverter of other functions and Darlington transistor.In addition, in the present embodiment, as shown in Figure 2, this discrete signal control circuit is divided into the output of three driving discrete signals with the discrete signal of an input, specifically the A0 of phase inverter U20, A1, A2 pin all are connected with the hot end of level switch module 100, form three inputs, follow-up Darlington transistor U25 processes these three signals simultaneously.In other embodiments, discrete signal can also be divided into more driving discrete signal output, as long as add phase inverter U20 and the Darlington transistor U25 that is connected with the hot end of level switch module 100.
As shown in Fig. 2 and 3, in a preferred embodiment, the discrete signal control circuit also comprises a plurality of reservations selection resistance R 3, a plurality of reservations select resistance R 3 be connected in turn phase inverter U20 a plurality of input ends and and the corresponding a plurality of output terminals of a plurality of input end between, preferably a plurality of reservation resistance R 3 are to be connected between the input end and output terminal of phase inverter U20 by switch S 1 respectively.If will be with signal application in some special occasions, be generally effectively low as discrete input signal on aircraft, under default conditions, discrete signal is high level, when the output terminal CIDS_PAOUT output that needs the discrete signal control circuit drove discrete signal control external unit, the output terminal CIDS_PAOUT of discrete signal control circuit was output as low level.And usually integrated circuit in start-up course in the discrete signal exported of GPIO end be a unsure state, but, must guarantee in reality that be that high level is to prevent the misoperation of controlled device in device power to the driving discrete signal of the output terminal CIDS_PAOUT of system stability discrete signal control circuit output.
Therefore, as a kind of alternatives, need to add reservation to select resistance R 3 to keep the output terminal CIDS_PAOUT output of discrete signal control circuit to drive discrete signal in circuit stable.In the integrated circuit start-up course, the discrete signal of GPIO end output is defined as high level, and the upper key normal operation of phase inverter U20 is reserved and selected resistance R 3 need not be linked into circuit, this moment, phase inverter U20 was output as low level, and the driving discrete signal of exporting through Darlington transistor U25 is high level.When GPIO end output is defined as low level, this moment, phase inverter U20 was without place in circuit, reserved and selected the R3 place in circuit, and the low level discrete signal of GPIO end output is still high level through reserving the driving discrete signal of selecting R3 to export after the Darlington transistor U25.On in the aircraft passenger compartment office terminal, determine that the output terminal of integrated circuit is output as high level.
In a preferred embodiment, the discrete signal control circuit also comprises the resettable fuse F1 that is connected with the output terminal of inverting amplifier spare 300.Resettable fuse F1 is used for preventing from preventing and treating external loading and extremely the discrete signal control circuit is impacted.
In a preferred embodiment, the discrete signal control circuit also comprises current-limiting resistance R4 and three terminal capacitor C1, the first end of the first end of current-limiting resistance R4 and three terminal capacitor C1 is electrically connected to the output terminal of inverting amplifier spare 300, the earth terminal ground connection of three terminal capacitor C1, the second end of current-limiting resistance R4 or the second end of three terminal capacitor C1 are as the output terminal CIDS_PAOUT of discrete signal control circuit.In this enforcement, three terminal capacitor C1 is used for the driving discrete signal of output is carried out filtering.The second end of above-mentioned current-limiting resistance R4 or the second end of three terminal capacitor C1 are interpreted as the output terminal CIDS_PAOUT of discrete signal control circuit, when the driving discrete signal that the discrete signal control circuit is exported is stablized, interfering fluctuation selects the second end of current-limiting resistance R4 as the output terminal CIDS_PAOUT of discrete signal control circuit less or can ignore the time; And the driving discrete signal of exporting when the discrete signal control circuit is unstable, interfering fluctuation is large or can not ignore the time, based on three terminal capacitor C1, electromagnetic radiation there is certain inhibiting effect, selects the second end of three terminal capacitor C1 as the output terminal CIDS_PAOUT of discrete signal control circuit.
In a preferred embodiment, the discrete signal control circuit also comprises stabilivolt D2, and the negative electrode of stabilivolt D2 is connected that the second end is connected, plus earth simultaneously with three terminal capacitor C1 with the second end of current-limiting resistance R4.Stabilivolt D2 is used for guaranteeing the stable of output signal.
In a preferred embodiment, the discrete signal control circuit also comprises protection capacitor C 2, and the first end of protection capacitor C 2 is connected with the hot end of level switch module 100, the second end ground connection.The conversion of 2 pairs of state of a controls of protection capacitor C shields.
In a preferred embodiment, the discrete signal control circuit also comprises pull-up resistor R5, and the first end of pull-up resistor R5 is electrically connected to the output terminal of inverting amplifier spare 300, the second end is connected with the 3rd power Vcc 3, preferably, and the voltage 28V of the 3rd power Vcc 3.
The principle of discrete signal control circuit is described with an embodiment below in conjunction with Fig. 2.
the input end of discrete signal control circuit is that the first end of pull-up resistor R1 and the cold end receipts of level switch module connect the also discrete signal of the GPIO end output of integrated circuit, pull-up resistor R1 promotes the level of the discrete signal of integrated circuit output, then realize level conversion by having the level switch module 100 that prevents the current flowing backwards function, thereafter the level after changing by anti-phase device 200 is realized phase reversal 180 degree, level after reversing by inverting amplifier spare 300 at last reverses and will strengthen its current driving ability and outputs to next equipment or components and parts, this phase preserving that drives discrete signal is consistent with the discrete signal phase place of the GPIO end output of integrated circuit, realize driving the equipment that needs different discrete incoming levels, avoided the connection two ends level of two equipment of interconnection or components and parts different, the property abnormality that can cause equipment, the problem of equipment or components and parts damage.
In addition, also provide a kind of air electronics, it comprises above-mentioned discrete signal control circuit.
The discrete signal control circuit is connected with the GPIO end of integrated circuit, and described discrete signal control circuit comprises: cold end is connected with described GPIO end the level switch module of realizing level conversion and preventing current flowing backwards; Input end is connected the anti-phase device with described conversion level counter-rotating later with the hot end of described level switch module; Input end is connected with the output terminal of described anti-phase device and described counter-rotating level is later reversed again and strengthen the anti-phase enlarging function device of driving force, and the output terminal output of described inverting amplifier spare drives discrete signal; And first end can be held with described GPIO simultaneously and the pull-up resistor R1 that cold end is connected, the second end is connected with the first power supply of described level switch module.
The circuit theory of discrete signal control circuit and explanation thereof are as above said, repeat no more here.
the input end of air electronics is that the first end of pull-up resistor R1 and the cold end receipts of level switch module connect the also discrete signal of the GPIO end output of integrated circuit, pull-up resistor R1 promotes the level of the discrete signal of integrated circuit output, then realize level conversion by having the level switch module 100 that prevents the current flowing backwards function, thereafter the level after changing by anti-phase device 200 is realized phase reversal 180 degree, level after reversing by inverting amplifier spare 300 at last reverses and will strengthen its current driving ability and outputs to next equipment or components and parts, this phase preserving that drives discrete signal is consistent with the discrete signal phase place of the GPIO end output of integrated circuit, realize driving the equipment that needs different discrete incoming levels, avoided the connection two ends level of two equipment of interconnection or components and parts different, the property abnormality that can cause equipment, the problem of equipment or components and parts damage.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a discrete signal control circuit, be connected with the GPIO end of integrated circuit, it is characterized in that, described discrete signal control circuit comprises:
Cold end is connected with described GPIO end the level switch module of realizing level conversion and preventing current flowing backwards;
Input end is connected the anti-phase device with described conversion level counter-rotating later with the hot end of described level switch module;
Input end is connected with the output terminal of described anti-phase device and described counter-rotating level is later reversed again and strengthen the inverting amplifier spare of driving force, and the output terminal output of described inverting amplifier spare drives discrete signal; And
First end simultaneously with the pull-up resistor R1 that cold end is connected, the second end is connected with the first power supply of described GPIO end and described level switch module.
2. discrete signal control circuit as claimed in claim 1, is characterized in that, described level switch module comprises having N-channel MOS pipe Q1 and the pull-up resistor R2 that function is filled with in counnter attack, wherein,
The source electrode of described N-channel MOS pipe Q1 is as the cold end of described level switch module, the grid of described N-channel MOS pipe Q1 is connected with described the first power supply, the drain electrode of described N-channel MOS pipe Q1 is as the hot end of described level switch module and be connected with the first end of described pull-up resistor R2, and the second source that the second end of described pull-up resistor R2 and supply voltage are larger than described the first power supply is connected.
3. discrete signal control circuit as claimed in claim 1, is characterized in that, described level switch module comprises N-type triode Q2, diode D1 and pull-up resistor R2, wherein,
The collector of described N-type triode Q2 as the cold end of described level switch module and with the anodic bonding of described diode D1, the base stage of described N-type triode Q2 is connected with described the first power supply, the emitter of described N-type triode Q2 as the hot end of described level switch module and simultaneously with the first end of described pull-up resistor R2 be connected the negative electrode of diode D1 and be connected, the second source that the second end of described pull-up resistor R2 and supply voltage are larger than described the first power supply is connected.
4. discrete signal control circuit as claimed in claim 1, it is characterized in that, described anti-phase device is phase inverter, described inverting amplifier spare is Darlington transistor, a plurality of input ends of described phase inverter are connected with the hot end of described level switch module simultaneously, a plurality of output terminals of described phase inverter and the corresponding connection of a plurality of input ends of described Darlington transistor, a plurality of output terminals of described Darlington transistor are exported respectively described driving discrete signal.
5. discrete signal control circuit as claimed in claim 4, it is characterized in that, described discrete signal control circuit comprises that also a plurality of reservations select resistance R 3, described a plurality of reservations select resistance R 3 be connected in turn described phase inverter a plurality of input ends and and the corresponding a plurality of output terminals of described a plurality of input end between.
6. discrete signal control circuit as claimed in claim 1, is characterized in that, described discrete signal control circuit also comprises the resettable fuse F1 that is connected with the output terminal of described inverting amplifier spare.
7. discrete signal control circuit as described in claim 1 to 6 any one, it is characterized in that, described discrete signal control circuit also comprises current-limiting resistance R4 and three terminal capacitor C1, the first end of the first end of described current-limiting resistance R4 and three terminal capacitor C1 is electrically connected to the output terminal of described inverting amplifier spare, the earth terminal ground connection of described three terminal capacitor C1, the second end of described current-limiting resistance R4 or the second end of three terminal capacitor C1 are as the output terminal of described discrete signal control circuit.
8. discrete signal control circuit as claimed in claim 7, it is characterized in that, described discrete signal control circuit also comprises stabilivolt D2, and the negative electrode of described stabilivolt D2 is connected that the second end is connected, plus earth simultaneously with three terminal capacitor C1 with the second end of described current-limiting resistance R4.
9. discrete signal control circuit as claimed in claim 1, is characterized in that, described discrete signal control circuit also comprises protection capacitor C 2, and the first end of described protection capacitor C 2 is connected with the hot end of described level switch module, the second end ground connection.
10. an air electronics, is characterized in that, comprises discrete signal control circuit as described in claim 1 to 9 any one.
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| CN 201220609570 CN202995310U (en) | 2012-11-16 | 2012-11-16 | Discrete signal control circuit and airplane electronic device |
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| CN 201220609570 CN202995310U (en) | 2012-11-16 | 2012-11-16 | Discrete signal control circuit and airplane electronic device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701456A (en) * | 2013-12-30 | 2014-04-02 | 京信通信系统（中国）有限公司 | Power amplifier external interface circuit |
| US10365304B2 (en) | 2017-10-06 | 2019-07-30 | Ge Aviation Systems Llc | Discrete input determining circuit and method |
| CN114442715A (en) * | 2021-12-29 | 2022-05-06 | 中国航空工业集团公司西安航空计算技术研究所 | 28V or open-circuit discrete magnitude output circuit |
-
2012
- 2012-11-16 CN CN 201220609570 patent/CN202995310U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701456A (en) * | 2013-12-30 | 2014-04-02 | 京信通信系统（中国）有限公司 | Power amplifier external interface circuit |
| US10365304B2 (en) | 2017-10-06 | 2019-07-30 | Ge Aviation Systems Llc | Discrete input determining circuit and method |
| US10690702B2 (en) | 2017-10-06 | 2020-06-23 | Ge Aviation Systems Llc | Discrete input determining circuit and method |
| CN114442715A (en) * | 2021-12-29 | 2022-05-06 | 中国航空工业集团公司西安航空计算技术研究所 | 28V or open-circuit discrete magnitude output circuit |
| CN114442715B (en) * | 2021-12-29 | 2023-08-18 | 中国航空工业集团公司西安航空计算技术研究所 | 28V or open circuit discrete quantity output circuit |
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Effective date of registration: 20190221 Address after: 518000 Guangzhou Nanshan Nantou Street Pass No. 2 Zhiheng Strategic Emerging Industrial Park, 1 Building and 1 Floor Patentee after: Shenzhen Donika Avionics Co.,Ltd. Address before: 518000 High-tech Industrial Park, Nanshan District, Shenzhen, Guangdong Province (North District) Patentee before: DONICA AVIATION ENGINEERING Co.,Ltd. |
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