CN102122948A - Circuit device and method for processing digital signal - Google Patents
Circuit device and method for processing digital signal Download PDFInfo
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- CN102122948A CN102122948A CN2010100032150A CN201010003215A CN102122948A CN 102122948 A CN102122948 A CN 102122948A CN 2010100032150 A CN2010100032150 A CN 2010100032150A CN 201010003215 A CN201010003215 A CN 201010003215A CN 102122948 A CN102122948 A CN 102122948A
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Abstract
The invention relates to a circuit device and a method for processing a digital signal. The circuit device comprises an input end, an output end, a switch circuit unit, a second voltage source and a second resistor, wherein the input end is used for receiving the digital signal; the digital signal includes a switch-to-ground digital signal and a switch-to-power supply digital signal; a driving input end of the switch circuit unit is coupled with the input end of the circuit device; and an output end of the switch circuit unit is coupled with the output end of the circuit device and also coupled with a first voltage source through a first resistor. The circuit device is configured to obtain the following effects: when an input digital signal at the input end of the circuit device is the switch-to-ground digital signal, the second voltage source is coupled with the input end of the circuit device through the second resistor, so that the switch circuit unit is switched on when the state of the digital signal from switch to ground is invalid, and when the input digital signal at the input end of the circuit device is the switch-to-power supply digital signal, the second voltage source and the input end of the circuit device are disconnected.
Description
Technical field
The present invention generally relates to the circuit arrangement and the correlation method of processing digital signal, and relates to digital signal samples circuit and the collocation method thereof that is suitable for treatment S TB and STG two class switching signals especially.
Background technology
In mechanical electric control, use the output of two class switching signals usually, a kind of be switch to power supply (Switch-to-Battery is abbreviated as STB) digital signal, another kind is that switch arrives ground (Switch-to-Ground is abbreviated as STG) digital signal.
The STB digital signal has two states: state of activation and disarmed state.This two states of STB digital signal can reflect the operating state of corresponding mechanical component respectively, for example automobile hydraulic oil lock hydraulic oil lock state.For example, when the work of automobile hydraulic oil lock is undesired, reflect that the STB digital signal of its state can be in state of activation; Lock when working properly when hydraulic oil, reflect that the STB digital signal of its state can be in disarmed state.
Shown in 1 figure,, can detect the state of this digital signal by STB digital signal S1 is input to digital signal samples circuit 100.To be in the STB digital signal S1 input circuit 100 of state of activation, and be equivalent to make digital signal samples circuit 100 inputs (for example+5V) to be connected, shown in Fig. 1 (a) with voltage source via K switch.And will be in the STB digital signal S input circuit 100 of disarmed state, shown in Fig. 1 (b), the input that is equivalent to digital signal samples circuit 101 is connected with the end that suspends via K switch.
The STG digital signal also has two states: state of activation and disarmed state.The operating state (for example automobile hydraulic filter state, hydraulic oil level etc.) that can reflect corresponding electric appliance component by this two states of STG digital signal respectively.For example, when the work of automobile hydraulic filter assemblies is undesired, reflect that the STG digital signal of its state can be in state of activation; When hydraulic filter is working properly, reflect that the STG digital signal of its state can be in disarmed state.
As shown in Figure 2, by STG digital signal S2 is input to digital signal samples circuit 200, can detect the state of this digital signal.To be in the STG digital signal S2 input circuit 200 of state of activation, the input that is equivalent to digital signal samples circuit 200 is connected with ground via K switch, shown in Fig. 2 (a).And will be in the digital signal S2 input circuit 200 of disarmed state, shown in Fig. 2 (b), the input that is equivalent to this digital signal samples circuit 200 links to each other with the end that suspends via K switch.
In the prior art, at this digital signal of two types, need usually to use two dissimilar digital signal samples circuit with these two kinds of signals of separate processes.This makes system design very complicated, can reduce reliability simultaneously.
Therefore, be necessary to provide a kind of circuit arrangement and circuit arrangement method, make it possible to single processing of circuit STB and STG two class switching signals.
Summary of the invention
For this reason, the present invention proposes a kind of new digital signal samples circuit, and it is applicable to this two classes signal of STB and STG simultaneously by the operating voltage source that access simply or disconnection link to each other with the transistor base pull-up resistor.Like this, under STB and two kinds of situations of STG, can use identical PCBA (printed circuit board (PCB)) layout and need not to revise.
According to an aspect of the present invention, provide a kind of circuit arrangement, comprise the input that is used for receiving digital signals, described digital signal comprises that switch arrives ground digital signal and switch to the power supply digital signal; Output and switching circuit unit, the driving input of switching circuit unit and the input of described circuit arrangement are coupled, the output of switching circuit unit and the output of described circuit arrangement are coupled, and the output of switching circuit unit also is coupled by first resistance and first voltage source.Wherein, described circuit arrangement further comprises second voltage source and second resistance, and described circuit arrangement is configured to make: when the supplied with digital signal of described input end is that switch is when arriving the ground digital signal, described second voltage source is coupled via described second resistance and described input, makes when described switch described switching circuit cell conduction when being invalid to the state of ground digital signal; When the supplied with digital signal of described input end is a switch during to the power supply digital signal, described second voltage source and described input disconnect.
In exemplary embodiment of the present invention, described switching circuit unit is the single tube total radio amplifier with biasing resistor, its grounded emitter, base stage and described input are coupled, collector electrode and described output are coupled, described collector electrode also is coupled by first resistance and applied voltage source, and when described switch when being invalid to the state of ground digital signal described amplifying circuit base emitter-base bandgap grading saturated.In addition, described single tube total radio amplifier can comprise a transistor and two biasing resistors, wherein, described transistorized base stage is coupled via first biasing resistor and described input, and described transistorized base stage is coupled via second biasing resistor and described transistorized emitter.
In exemplary embodiment of the present invention, described circuit arrangement may further include first electric capacity and the transient voltage that are coupled in parallel between described input and the ground and suppresses diode.
In exemplary embodiment of the present invention, described circuit arrangement may further include first diode, and it is configured to make described input via the base stage of described first diode-coupled to described amplifying circuit.
In exemplary embodiment of the present invention, described circuit arrangement may further include the base stage that is connected on described amplifying circuit and the 3rd resistance between described first diode, and the base stage of described amplifying circuit via second diode-coupled to described first voltage source.
In exemplary embodiment of the present invention, described circuit arrangement may further include the base stage that is coupling in described amplifying circuit and second electric capacity between the described ground.
According to exemplary embodiment of the present invention, can described second voltage source and described input be disconnected by removing described second resistance.
In exemplary embodiment of the present invention, described switching circuit can also be relay switching circuit or comprise the PNP/NPN transistor or the semiconductor switch circuit of field of electric force effect transistor or igbt.
According to a further aspect in the invention, a kind of method of switch being handled to two kinds of digital signals of power supply digital signal to ground digital signal and switch by single circuit arrangement is provided, described circuit comprises the switching circuit unit, the driving input of switching circuit unit and the input of described circuit arrangement are coupled, the output of switching circuit unit and the output of described circuit arrangement are coupled, and the output of switching circuit unit also is coupled by first resistance and first voltage source.Wherein, described method comprises that further configuration second voltage source and second resistance make the type and described input coupling or disconnection of described second voltage source according to the digital signal of the input of described input end, wherein when the digital signal of described input be that switch is when arriving the ground digital signal, described second voltage source is coupled by described second resistance and described input, makes when switch described switching circuit cell conduction when being invalid to ground digital signal state; When the digital signal of described input is a switch during to the power supply digital signal, described second voltage source and described input disconnect.
Simplified system design according to the solution of the present invention, applied widely, and very high reliability can be provided.In addition, be easy to realize according to the solution of the present invention, and very economical.
Description of drawings
Now with reference to accompanying drawing more detailed description embodiments of the invention, wherein similar label is represented similar element, and accompanying drawing comprises:
The Fig. 1 (a) and (b) two states of schematically illustrated STB digital signal respectively;
The Fig. 2 (a) and (b) two states of schematically illustrated STG digital signal respectively;
Fig. 3 illustrates wherein to use the block diagram of system according to an exemplary embodiment of the present invention;
Fig. 4 illustrates circuit theory diagrams according to an exemplary embodiment of the present invention;
Fig. 5 illustrates the circuit theory diagrams of circuit arrangement shown in Figure 4 according to an exemplary embodiment of the present invention when input STB digital signal;
Fig. 6 is the circuit theory diagrams that another exemplary embodiment according to the present invention is shown;
Fig. 7 is the circuit theory diagrams that the another exemplary embodiment according to the present invention is shown;
Fig. 8 is the circuit theory diagrams that the another exemplary embodiment according to the present invention is shown;
Fig. 9 illustrates circuit arrangement according to an exemplary embodiment of the present invention;
Figure 10 illustrates the circuit theory diagrams of another exemplary embodiment according to the present invention; And
Figure 11 illustrates the circuit theory diagrams of another exemplary embodiment according to the present invention.
Embodiment
Describe in detail according to exemplary embodiment of the present invention below in conjunction with accompanying drawing.
Fig. 3 illustrates wherein can use system block diagram according to an exemplary embodiment of the present invention.Other embodiment that embodiment shown in Figure 3 and this specification are described after a while discuss with reference to the automobile mechanical electrical control.Yet, those skilled the in art will appreciate that, embodiments of the invention are not limited to the control of automobile mechanical electrical control or mechanical electric, but go for any suitable system, unit, electronic device of Applied Digital signal sample circuit or the like.
As shown in Figure 3, in the automobile mechanical electric control system, generally include component states detecting unit 310, be used for the operating state that (for example passing through transducer) detects various assemblies.Wherein, the digital signal of reflection assembly operating state can roughly be divided into STG signal and STB signal two classes.The digital signal that for example reflects hydraulic filter state, hydraulic oil level etc. belongs to the STG digital signal, and the digital signal of reflection hydraulic oil lock state etc. belongs to the STB digital signal.So, correspondingly, the signal detection module in the state detection unit 310 can be divided into STG signal detection module 311 and STB signal detection module 312.For example, STG signal detection module 311 can comprise: hydraulic filter module 313, and whether the operating state that is used to detect hydraulic filter is normal; Whether hydraulic oil level detecting module 315, it is normal to be used to detect the hydraulic oil level.STB signal detection module 312 can comprise: hydraulic filtering lock module 314, whether the operating state that is used to detect the hydraulic oil lock is normal.Should understand, although in fact a module in that this two module that only show that the STG signal detection module comprises and STB signal detection module comprise also exists a plurality of other detection modules that belong to STG signal detection module or STB signal detection module in the automobile mechanical electrical control.
Component states detecting unit 310 will reflect the digital signal of each assembly operating state, for example, from the hydraulic filter status signal of hydraulic filter module 313, from the hydraulic oil level signal of hydraulic oil level detecting module 315 and from the hydraulic oil lock status signal of hydraulic oil lock module 314, send digital signal samples circuit 320 respectively to.
Digital signal samples circuit 320 is handled STG digital signal or STB digital signal respectively, and treated working state signal is exported to applying unit 330.Because applying unit 330 is because of the difference of each application, to the signal voltage size of being accepted, can bear and pour into size of current requirement targetedly, so STB signal and STG signal can not be simply directly just as the input of applying unit 330, but need 320 STB signal and STG signal processing become the digital signal that unit 330 can be accepted and respond, reflection STB signal and STG signal condition that could be indirect.
It should be noted that in the solution of the present invention, use the individual digit signal to adopt circuit to adjust STG signal and STB signal, and non-traditional two digital signal sample circuits that separate.
The working state signal that applying unit 330 obtains through adjusting can be known according to this signal whether the operating state of associated component is normal, and take corresponding operation, for example is used for auto electric control.
The connection and the operation principle of digital signal samples circuit according to an embodiment of the invention are described below with reference to Figure 4 and 5.
Fig. 4 illustrates the circuit theory diagrams according to the digital signal samples circuit 400 of simplification of the present invention.The input I of this circuit is used for incoming digital signal, comprises STB digital signal or STG digital signal.The output O and the applying unit 330 of this sample circuit are coupled, and are used for the digital signal after applying unit 330 provides processing.
This sample circuit also comprises the single tube total radio amplifier 410 with biasing resistor.For example, amplifying circuit 410 can comprise as shown in Figure 4 transistor T R1 and two the biasing resistor R1 and the R2 of configuration.
Input I is connected to the base stage of transistor T R1 via resistance R 1.The emitter of transistor T R1 meets current potential ground GND, and base stage is connected with emitter via resistance R 2.The collector electrode of transistor T R1 is connected to output O via resistance R 3, and is connected to applied voltage source Ua via resistance R 4.This voltage source can be the voltage source in the applying unit, and its voltage position for example can be+2.8V, and be not limited to 2.8V.
This sample circuit also comprises pull-up resistor R6.An end and the operating voltage source Ub of pull-up resistor R6 are coupled, and the other end and input I are coupled.For example, this resistance can be removable, still is the STG digital signal thereby allow to belong to the STB digital signal according to input signal, and operating voltage source and input I are coupled or are not coupled.When the supplied with digital signal at input I place belonged to the STG digital signal, operating voltage source was connected with input I via resistance R 6, as shown in Figure 4; When the supplied with digital signal at input I place belongs to the STB digital signal, remove resistance R 6 and make operating voltage source and input I disconnect, as shown in Figure 5.
Circuit working principle under the situation of two kinds of digital signal inputs below is described respectively.When input signal belonged to the STG digital signal, operating voltage source Ub was coupled via pull-up resistor R6 and signal input part.In application, operating voltage source is generally 3.9 volts, but is not limited to this.Even, operating voltage source can with the shared identical voltage source in applied voltage source.
When the STG digital signal was in disarmed state, the input I of this sample circuit suspended.So this input I is moved to 3.9 volts of operating voltage source on the pull-up resistor R6, thereby make the voltage position at intersection point A place greater than the basic emitter-base bandgap grading saturation voltage of transistor T R1.So TR1 is switched on, make intersection points B be connected with current potential ground GND basically, this means that this output O also is connected to current potential ground GND basically.So the signal of output can be identified as electronegative potential.
When the STG digital signal was in state of activation, the input I of this sample circuit was switched to ground.So input I is directly pulled down to GND.Therefore, intersection point A place is the low-voltage position, and this voltage position can not make the TR1 conducting, then intersection points B can not be connected to ground GND, but moved to 2.8 volts of applied voltage source Ua on the pull-up resistor R4 of collector electrode.This means that output O obtains 2.8 volts voltage.So the signal at output O place can be identified as high potential.
Therefore, if the digital signal input is the STG digital signal, then the output of sample circuit can correspondingly change to show the variation of input signal, judges with the unit thereby supply.
As the above analysis, be switched in due course, need the resistance value of each resistance of configuration, to satisfy with lower inequality at least in order to make TR1
Wherein, V
UbBe the current potential at operating voltage source place, be generally+3.9 volts;
V
BE (sat)Be the basic emitter-base bandgap grading saturation voltage of TR1, be generally 0.7 volt;
α is an application factor, can select according to practical application, and for example can be 1.3.
In actual applications, make the resistance value of R6 usually, generally be selected in 1K ohm～47K ohm less than 78K ohm.
When input signal was the STB digital signal, input I and operating voltage source Ub disconnected.For example, this can realize by removing resistance R 6 (as shown in Figure 5), or other mechanism by operating voltage source Ub and input I are not coupled, and for example switch, wire jumper or the like are realized.
When the STB digital signal was in disarmed state, the input I of this sample circuit was suspended, so intersection point A is biased resistance R 2 and is connected to ground GND, obviously such low-voltage position can not make transistor T R1 conducting.So intersection points B can not be connected to ground GND, but is moved to applied voltage source Ua on the pull-up resistor R4 of collector electrode.This means that output O can obtain the voltage of 2.8V.So the signal of output can be identified as a high position.
When the STB digital signal was in state of activation, the input I of this sample circuit was switched to the voltage source (not shown).In application, this voltage source voltage position is generally for example 3～5V.So this input I by on move this voltage source to, and make the voltage position at intersection point A place greater than the basic emitter-base bandgap grading saturation voltage of transistor T R1.So transistor T R1 is switched on, make intersection points B be connected with ground GND basically.This means that this output O also is connected to ground GND basically.So the signal of output can be identified as low level.
Therefore, if the digital signal input is the STB switching signal, then the output of sample circuit also can correspondingly change to show the variation of input switch signal, judges with the unit thereby supply.
In a preferred embodiment of the invention, as shown in Figure 6, can between incoming end I and ground GND, parallel connection insert capacitor C 11 and transient voltage inhibition diode D1 (model is P6SMBJ36CA for example),, and prevent static damage with the impulse disturbances in the elimination input signal.
In a preferred embodiment of the invention, as shown in Figure 7, can between the base stage (for example base bleederresistance R1 of transistor T R1) of incoming end I and amplifying circuit 410, increase diode D2 (model is MA2J1110 for example), prevent that revers voltage infringement signal is according to sample circuit of the present invention.
In a preferred embodiment of the invention, as shown in Figure 8, can increase series resistance R5 between the base stage (being the base bleederresistance R1 of transistor T R1) of amplifying circuit 400 and the input I and between the base stage (being triode TR1 base bleederresistance R1) of amplifying circuit 400 and applied voltage source Ua, insert diode D3 (model is MA2J1110 for example), so that prevent overvoltage infringement, for example prevent+the automobile batteries voltage direct short-circuit of 24V is connected on the input I.When overvoltage takes place, R5 and D3 can suppress electric current and pour into applied voltage source Ua, the circuit in case the infringement applying unit in (for example 330), thus make entire circuit safer.Because the electric current that pours into of tolerance depends on the applying unit that produces voltage source Ua, so the resistance value of R5 depends on the applying unit that produces voltage source Ua.
In addition, can between the base stage (being the base bleederresistance R1 of transistor T R1) of amplifying circuit 400 and ground GND, insert capacitor C 12, to eliminate the impulse disturbances that causes because of resistance R 5 and diode D5 series connection.
Fig. 9 illustrates circuit arrangement according to an exemplary embodiment of the present invention.In actual applications, single tube total radio amplifier 410 can use the PUMD2 chip to realize.The pin one of PUMD2 is the emitter of amplifying circuit 410, and pin two is the base stage of amplifying circuit 410, and pin 6 is the collector electrode of amplifying circuit 410.In addition, the resistance value of pull-up resistor R6 is preferably 1K ohm, and the resistance value of resistance R 3 is preferably 220 ohm, the resistance value of resistance R 4 is preferably 47K ohm, the resistance value of resistance R 5 is preferably 22K ohm, and the value of capacitor C 11 is preferably 1000pF, and the value of capacitor C 12 is preferably 100pF.
Although conducting or not conducting come work in response to the state of two kinds of switching signals by transistor amplifier circuit in the above-described embodiments, in fact expect easily as ability and technical staff, can use other switching circuit unit to replace above-mentioned transistor amplifier circuit, with by the switching circuit cell response in the state of two kinds of switching signals and conducting or not conducting come work.For example can use power semiconductor switch circuit (as shown in figure 10) or relay switching circuit (as shown in figure 11).
Figure 10 illustrates the example that adopts semiconductor device N channel power MOS FET to realize the switching circuit unit.Wherein, frame of broken lines 410 expression switching circuit unit.The semiconductor device N channel power MOS FET of frame 1012 for having switching characteristic.Frame 1014 is the drive circuit of semiconductor device, and its effect is similar to transistorized base biasing resistor, and just for other semiconductor device, its drive circuit may be more more complicated than transistorized base biasing resistor.In fact, this semiconductor device can also be PNP/NPN transistor, power MOSFET (field of electric force effect transistor), IGBT devices such as (igbts).When these semiconductor device are realized its switching function, just can reach and the same gating STB signal of preferred embodiment of the present invention and the function of STG signal.
Figure 11 illustrates the example that adopts relay switch to realize the switching circuit unit.As shown in figure 11, frame of broken lines 410 expression switching circuit unit, the frame 1112 in the frame of broken lines is a relay.Realization principle to the STG signal processing is as follows: L1 is the actuating coil of relay, when input I is unsettled, L1 links to each other with voltage source Ub, so coil gets, relay work, relay contact K1 action, its contact switch changes direction to another contact (herein by stain to white point), the A point is connected to GND thus, and output O is an electronegative potential.When input I ground connection, L1 pulled down to GND, does not have the electric current process, so relay do not work, and K1 is failure to actuate and keeps original electric shock state (still at stain), and the A point is obtained voltage through resistance thus, is high potential.Can realize equally with similar principles for the STB signal.In addition, coil L1 can also link to each other with voltage source Ub by drive circuit, and the input of drive circuit (also can be called drive input) is coupled with input I, makes relay work thereby make it possible to drive coil L1.
In fact, when realizing embodiments of the invention, total radio amplifier can be selected other similar chip according to actual needs else.And above-mentioned accompanying drawing all is the circuit diagram of having simplified, and those skilled in the art will find apparent that, can reduce or replace device wherein, or increases additional device or circuit, embodiments of the invention being applied to various answering in the environment.Additionally or replacedly, can will install in a circuit according to the invention with integrated mode and combine, form new integrated circuit (IC) apparatus with other available circuits.
Although with reference to comprising that the specific examples of carrying out preference pattern of the present invention described the present invention, but interior foregoing circuit device and the technology of spirit and scope that one of skill in the art will appreciate that the claim that falls into the present invention's proposition can have multiple variation and displacement.
Claims (12)
1. a circuit arrangement comprises
The input that is used for receiving digital signals, described digital signal comprise that switch arrives ground digital signal and switch to the power supply digital signal;
Output, and
The switching circuit unit, the driving input of described switching circuit unit and the input of described circuit arrangement are coupled, the output of described switching circuit unit and the output of described circuit arrangement are coupled, and the output of described switching circuit unit also is coupled by first resistance and first voltage source;
It is characterized in that described circuit arrangement further comprises second voltage source and second resistance, and described circuit arrangement is configured to make:
When the supplied with digital signal of the input end of described circuit arrangement is that switch is when arriving the ground digital signal, described second voltage source is coupled via the input of described second resistance and described circuit arrangement, makes when described switch described switching circuit cell conduction when being invalid to the state of ground digital signal;
When the supplied with digital signal of the input end of described circuit arrangement is a switch during to the power supply digital signal, the input of described second voltage source and described circuit arrangement disconnects.
2. circuit arrangement as claimed in claim 1, wherein said switching circuit unit is the single tube total radio amplifier with biasing resistor, its grounded emitter, the input of base stage and described circuit arrangement is coupled, the output of collector electrode and described circuit arrangement is coupled, described collector electrode also is coupled by first resistance and first voltage source, and wherein when described switch when being invalid to the state of ground digital signal described amplifying circuit base emitter-base bandgap grading saturated.
3. circuit arrangement as claimed in claim 2, wherein said single tube total radio amplifier comprises a transistor and two biasing resistors, wherein, described transistorized base stage is coupled via the input of first biasing resistor and described circuit arrangement, and described transistorized base stage is coupled via second biasing resistor and described transistorized emitter.
4. circuit arrangement as claimed in claim 3 further comprises:
Be coupled in parallel in input and first electric capacity between the ground and the transient voltage inhibition diode of described circuit arrangement.
5. circuit arrangement as claimed in claim 4 further comprises first diode, and it is configured to make that the input of described circuit arrangement arrives the base stage of described amplifying circuit via described first diode-coupled.
6. circuit arrangement as claimed in claim 5 further comprises:
Be connected on the 3rd resistance between the input of the base stage of described amplifying circuit and described circuit arrangement, and
Second diode, it is configured to make that the base stage of described amplifying circuit arrives described first voltage source via second diode-coupled.
7. circuit arrangement as claimed in claim 6 further comprises:
Be coupling in the base stage of described amplifying circuit and second electric capacity between the described ground.
8. circuit arrangement as claimed in claim 1, wherein said switching circuit unit are relay switching circuits or comprise the PNP/NPN transistor or the semiconductor switch circuit of field of electric force effect transistor or igbt.
9. any one circuit arrangement in the claim as described above wherein disconnects the input of described second voltage source and described circuit arrangement by removing described second resistance.
10. method of switch being handled to two kinds of digital signals of power supply digital signal to ground digital signal and switch by single circuit arrangement, described circuit comprises the switching circuit unit, the driving input of described switching circuit unit and the input of described circuit arrangement are coupled, the output of described switching circuit unit and the output of described circuit arrangement are coupled, and the output of described switching circuit unit also is coupled by first resistance and first voltage source
It is characterized in that described method comprises configuration second voltage source and second resistance, make described second voltage source according to the type of the digital signal of the input end input of described circuit arrangement and the input coupling or the disconnection of described circuit arrangement, wherein
When the digital signal of described input is a switch when arriving the ground digital signal, described second voltage source is coupled by the input of described second resistance and described circuit arrangement, and is feasible when switch described switching circuit cell conduction when being invalid to ground digital signal state;
When the digital signal of described input is a switch during to the power supply digital signal, the input of described second voltage source and described circuit arrangement disconnects.
11. method as claimed in claim 11, wherein said switching circuit unit is the single tube total radio amplifier with biasing resistor, its grounded emitter, the input of base stage and described circuit arrangement is coupled, the output of collector electrode and described circuit arrangement is coupled, described collector electrode also is coupled by first resistance and first voltage source, and when switch when being invalid to ground digital signal state described amplifying circuit base emitter-base bandgap grading saturated.
12. method as claimed in claim 11 wherein disconnects the input of described second voltage source and described circuit arrangement by removing described second resistance.
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| CN103529720A (en) * | 2013-09-26 | 2014-01-22 | 浙江吉利控股集团有限公司 | Digital input circuit and vehicle-mounted controller using same |
| CN104571252A (en) * | 2014-12-18 | 2015-04-29 | 哈尔滨工业大学 | Multi-type analog signal processing circuit supplied with power through single power supply |
| CN107241919A (en) * | 2014-12-23 | 2017-10-10 | 赛峰电气与电源公司 | Control device for supply line |
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| CN103529720A (en) * | 2013-09-26 | 2014-01-22 | 浙江吉利控股集团有限公司 | Digital input circuit and vehicle-mounted controller using same |
| CN104571252A (en) * | 2014-12-18 | 2015-04-29 | 哈尔滨工业大学 | Multi-type analog signal processing circuit supplied with power through single power supply |
| CN107241919A (en) * | 2014-12-23 | 2017-10-10 | 赛峰电气与电源公司 | Control device for supply line |
| US10560083B2 (en) | 2014-12-23 | 2020-02-11 | Safran Electrical & Power | Control device for power supply line |
| CN107241919B (en) * | 2014-12-23 | 2021-01-22 | 赛峰电气与电源公司 | Control device for power supply line |
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| CN102122948B (en) | 2015-04-08 |
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