CN212749163U - Circuit arrangement for a plurality of electrical switches and steering wheel having such a circuit arrangement - Google Patents
Circuit arrangement for a plurality of electrical switches and steering wheel having such a circuit arrangement Download PDFInfo
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- CN212749163U CN212749163U CN201922358085.1U CN201922358085U CN212749163U CN 212749163 U CN212749163 U CN 212749163U CN 201922358085 U CN201922358085 U CN 201922358085U CN 212749163 U CN212749163 U CN 212749163U
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- switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
- H01H9/167—Circuits for remote indication
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/10—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards
- B60Q3/16—Circuits; Control arrangements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The utility model relates to a circuit arrangement and steering wheel that has this circuit arrangement for a plurality of electrical switches. The circuit arrangement has a signal evaluation unit, a first switching device and a second switching device, the first and second switching devices each having a digital signal input and an analog signal output. The signal evaluation unit has two analog signal inputs and one digital signal output, and each switching device has four circuit arrangements. Each circuit arrangement has an electrical switch. Each switching device is arranged to provide a respective output signal on a respective analog signal output when the respective electrical switch is activated. The signal input ends of the first and second switching devices are electrically connected with the digital signal output end of the signal evaluation unit respectively. The signal output of the first or second switching device is electrically connected to the first or second analog signal input of the signal evaluation unit. The four circuit arrangements of each switching device are formed as two circuit arrangement pairs, respectively.
Description
Technical Field
The utility model relates to a circuit arrangement that is used for a plurality of electrical switches, is used for detecting a plurality of electrical switches's on-off state.
Background
Circuit arrangements of this type are known, for example, in the automotive field, for example as a steering wheel multifunction switch (MFS).
In motor vehicles, a multifunction switch is used in the steering wheel in order to be able to control the multifunction unit during driving without having to remove the hand from the steering wheel. For example, one portion of the multi-function switch may increase and decrease the volume of the sound/audio output while another portion may select radio stations, songs, contact entries, and the like. Another part may for example accept a telephone call or terminate a phone call or may also activate a voice assistant. Such general-purpose multi-function switches are arranged in a switch matrix and, in most cases, a microcontroller is used to perform events for the activated switches. If a switch is pressed, a signal corresponding to this (pressed/not pressed) is sent by the microcontroller to the vehicle bus. In this case, these microcontrollers generally have their own electrical input for each such multifunction switch. Thus, when, for example, eight multifunction switches are used in the steering wheel of a motor vehicle, then either one microcontroller with eight inputs or two microcontrollers with four inputs are required. However, in this case many wires are required from the switch matrix to the controller and the production costs are ultimately increased due to the need for two microcontrollers instead of only one microcontroller or due to the need for one larger microcontroller with more inputs.
A further development is to connect two such switches to each microcontroller input. For this purpose, each of the two switches has a different series resistance, so that, in the case of a switch activation, it can be determined which of the two switches is activated, depending on the series resistance of the line switched on by the switch activation. However, in the case of using an advantageous carbon rubber mat as the electrical switch matrix, this solution is problematic, since a triggering play is produced by pressing and releasing the switch button lightly, whereby the resistance changes and thus the decision as to which switch is selected becomes error-prone. Therefore, these devices typically require gold rubber pads, which are more expensive. Also in this case, an erroneous decision is still possible due to the transmitted signal, since the possibility of distinguishing the input signal is only achieved on the basis of two different series resistances.
SUMMERY OF THE UTILITY MODEL
Against this background, the object underlying the invention is to provide a technically advantageous and fail-safe circuit arrangement which overcomes at least one of the disadvantages of the prior art.
It should be noted that the features listed individually in the following description can be combined with one another in any technically meaningful way and represent further embodiments of the invention. The present invention will be described with additional specificity and detail through the use of the accompanying drawings.
It should furthermore be noted that the wording "and/or" used in the following text, between two features and relating these two features to one another, is always to be understood in such a way that in a first design according to the subject matter of the present invention only the first feature can be present, in a second design only the second feature can be present, and in a third design not only the first feature but also the second feature can be present.
According to the invention, the circuit arrangement for a plurality of electrical switches for detecting the switching state of a plurality of electrical switches has the following: a signal evaluation unit; a first switching device having a digital signal input and an analog signal output; and a second switching device having a digital signal input and an analog signal output. In this case, the signal evaluation unit has two analog signal inputs and one digital signal output. Each switching device has four circuit arrangements, wherein each circuit arrangement has one electrical switch, and wherein each switching device is provided for providing a respective output signal at a respective analog signal output when the respective electrical switch of the respective electrical circuit arrangement of the respective switching device is activated. The signal input end of the first switch device and the signal input end of the second switch device are respectively electrically connected with the digital signal output end of the signal evaluation unit. The signal output of the first switching device is electrically connected to the first analog signal input of the signal evaluation unit. And the signal output of the second switching device is electrically connected to the second analog signal input of the signal evaluation unit. And in this case the four circuit arrangements of each switching device are formed as two circuit arrangement pairs, respectively. Upon activation of one switch of each circuit arrangement of a circuit arrangement pair, a corresponding identical first electrical output signal is generated. Upon activation of the respective other switch of each circuit arrangement of the pair of circuit arrangements, a respective identical second electrical output signal is generated. In this case, the respective first output signal is different from the respective second output signal. By means of a clock signal provided at the digital signal output of the signal evaluation unit, it can be distinguished which of the two pairs of circuit arrangements of the respective switching device is activated.
A correspondingly identical first or second electrical output signal refers to an electrical signal which can be regarded as identical within a tolerance deviation of the electrical components.
A circuit arrangement in the sense of the present invention means in this case an electronic circuit for detecting the individual switching states of a plurality of electrical switches. Such a circuit arrangement can be used in this case, in particular, in the automotive sector, since extremely restrictive regulations exist there, which relate to temperature stability and the technical standards to be adhered to.
The signal evaluation unit in this context means an electronic computing unit in order to be able to determine, when an electrical signal is present at the signal input, whether an event is to be triggered as a result, and if so, which event is to be triggered as a result. Examples of such electronic calculation units are in this case, for example, analog and/or digital signal processors (ASP/DSP), microprocessors and microcontrollers.
A switching device in the sense of the present invention means in this case an electronic device which is composed of at least one electrical switch and further electronic components which are provided for responding to a predetermined input signal and to the operation of the electrical switch arranged in the switching device with a predetermined output signal.
An electrical circuit arrangement in the sense of the present invention means in this case an electronic device on which at least one electronic switch is arranged and in which further electrical/electronic components can be arranged, which determine the switching characteristics or the electrical signals generated by the activation of the switch.
A circuit arrangement in the sense of the present invention is in this case an electronic device which is composed of an electrical switch and further electrical components which together provide a switching function.
Activation of a switch in the sense of the present invention means in this case that the circuit is closed. These switches are, for example, mechanical switches or capacitively acting switches, the circuit preferably being closed only when the switch is pressed.
This embodiment has the advantage that a circuit arrangement can be provided which can be produced in a cost-effective manner by using only one signal evaluation unit with several signal inputs/outputs, despite the use of eight switches.
Furthermore, a steering wheel for a motor vehicle is also disclosed, which has a circuit arrangement according to the invention.
This embodiment has the advantage that a switching device for a steering wheel can be provided, which can be produced in a cost-effective manner by using only one signal evaluation unit with several signal inputs/outputs, despite the use of eight switches.
Furthermore, a motor vehicle is disclosed, which has the aforementioned steering wheel and/or a circuit arrangement according to the invention.
This embodiment has the advantage that a circuit arrangement for a motor vehicle can be provided, wherein the circuit arrangement can be produced in a cost-effective manner by using only one signal evaluation unit with several signal inputs/outputs, despite the use of eight switches.
According to one embodiment, the signal evaluation unit of the circuit arrangement has a further signal input. According to another exemplary embodiment, the switching device further comprises: the other signal input of the signal evaluation unit is the other digital signal input.
This embodiment has the advantage that an easily evaluable signal can be provided and processed, which is not prone to errors.
According to one embodiment, the further signal input of the signal evaluation unit is a further analog signal input. A maximum of four further switches can be integrated into the circuit arrangement with the aid of each further analog signal input of the signal evaluation unit.
Preferably, each switching device has a second digital signal output. In this case, the second signal output of the first switching device and the second signal output of the second switching device are each electrically connected to a further signal input of the signal evaluation unit. And the switching devices are provided for switching the signal evaluation unit from the passive state into the active state upon activation of the electrical switches of each circuit arrangement of each switching device.
This embodiment has the advantage that an advantageous signal evaluation unit can be used, in which case the circuit arrangement also provides a so-called watchdog or call function.
According to another exemplary embodiment, the switching device further comprises an array of semiconductor elements for each circuit arrangement of each switching device. In this case, each semiconductor element array is arranged in such a way that, when the respective electrical switch of the respective circuit arrangement is activated, it can be distinguished by means of a clock signal provided at the digital signal output of the signal evaluation unit which of the circuit arrangements is activated.
This embodiment has the advantage that a cost-effective solution can be provided in order to reliably determine which switch has been activated despite the small number of signal inputs of the signal evaluation unit.
According to a further exemplary embodiment, each semiconductor element array of the circuit arrangement furthermore has either transistors or diodes.
This embodiment has the advantage that conventional electrical components can be used, as a result of which the production costs can be reduced.
According to another exemplary embodiment, the first electrical circuit arrangement of each circuit arrangement pair of each switching device further comprises an array of semiconductor elements which differs from the array of semiconductor elements of the second electrical circuit arrangement of the respective circuit arrangement pair of the respective switching device.
This embodiment has the advantage that a circuit can be realized in a cost-effective manner, by means of which the coordination, i.e. which switch is activated, can be reliably realized.
According to a further exemplary embodiment, the semiconductor element array of the first electrical circuit arrangement of each circuit arrangement pair of each switching device has a transistor, whereas the semiconductor element array of the second electrical circuit arrangement of the respective circuit arrangement pair of the respective switching device has a diode. This embodiment has the advantage that a circuit can be realized in a more cost-effective manner, by means of which the coordination, i.e. which switch is activated, can be reliably realized.
According to a further exemplary embodiment, the circuit arrangement has a debouncing device for each electrical switch of each circuit arrangement for debouncing the first or second electrical output signal generated upon activation of the respective electrical switch.
This design has the advantage that erroneous decisions regarding which switch is activated can be further reduced.
According to another exemplary embodiment, each debouncing means further comprises a debouncing transistor for debouncing the electrical output signal generated upon activation of the respective electrical switch.
This embodiment has the advantage that erroneous decisions about which switch is activated can be reduced in a cost-effective manner.
According to another exemplary embodiment, the collector of the transistor of the array of semiconductor elements of the first electrical circuit arrangement of each circuit arrangement pair of each switching device is electrically connected to the base of the debounce transistor.
This embodiment has the advantage that the signal flow can be set or defined more precisely.
According to another exemplary embodiment, the signal evaluation unit further comprises a further analog signal input and the switching device further comprises a third switching device having a digital signal input and an analog signal output. In this case, the third switching device has four electrical circuit arrangements, and in this case each circuit arrangement of the third switching device has an electrical switch. In this case, the signal input of the third switching device is electrically connected to the digital signal output of the signal evaluation unit. The analog signal output of the third switching device is electrically connected to a further analog signal input of the signal evaluation unit.
This embodiment has the advantage that twelve switches can be evaluated or monitored by means of a cost-effective signal evaluation unit having four inputs/outputs.
According to a further exemplary embodiment, the signal evaluation unit has a total of four electrical contacts. In this case, among the four electrical contacts, two electrical contacts function as analog signal input terminals, and the other electrical contact functions as a digital signal output terminal. Preferably, of the four electrical contacts, the further electrical contact functions as an analog and/or digital signal input.
This embodiment has the advantage that a very cost-effective signal evaluation unit with four inputs/outputs can be used.
According to another exemplary embodiment, the signal evaluation unit of the switching device further comprises a microcontroller.
This embodiment has the advantage that a particularly cost-effective signal evaluation unit can be used.
Drawings
Further features and advantages of the invention emerge from the following description of embodiments of the invention, which are to be understood as non-limiting. This embodiment will be described in more detail below with reference to the drawings. In the drawing are shown schematically:
figure 1 shows an embodiment of the circuit arrangement according to the invention,
figure 2 shows another embodiment of a circuit arrangement according to the invention,
figure 3 shows another embodiment of a circuit arrangement according to the invention,
fig. 4 shows an embodiment of a steering wheel with a circuit arrangement according to the invention, an
Fig. 5 shows an exemplary embodiment of a motor vehicle with the steering wheel of fig. 4 and/or with a circuit arrangement according to the present invention.
In the different figures, components having equivalent meaning are always provided with the same reference numerals in terms of their function, and are therefore generally described only once.
List of reference numerals
1000 circuit arrangement
1100 Signal evaluation Unit
1110 first analog signal input of signal evaluation unit
1120 second analog signal input of the signal evaluation unit
1130 other/third analog/digital signal inputs of the Signal evaluation Unit
1140 digital signal output terminal of the signal evaluation unit
1200 first switching device
1210 digital signal input terminal of switch device
1220 first analog signal output terminal of switching device
1230 second analog signal output of the switching device
1250 first electrical circuit arrangement of a first switching device
1251 an electrical switch of a first electrical circuit arrangement of a first switching device
1260 second electrical circuit arrangement of the first switching device
1261 electrical switch of a second electrical circuit arrangement of a first switching device
1270 third electric circuit arrangement of the first switching device
1271 Electrical switch of a third Electrical Circuit arrangement of a first switching device
1280 fourth electrical circuit arrangement of the first switching device
1281 electric switch of a fourth electric circuit arrangement of a first switching device
1300 second switch device
1350 first electric circuit arrangement of the second switching device
1351 electrical switch of a first electrical circuit arrangement of a second switching device
1360 second electrical circuit arrangement of a second switching device
1361 electrical switch of a second electrical circuit arrangement of a second switching device
1370 third electrical circuit arrangement of a second switching device
1371 electrical switch of a third electrical circuit arrangement of a second switching device
1380 fourth electrical circuit arrangement of the second switching device
1381 electrical switch of a fourth electrical circuit arrangement of a second switching device
2000 steering wheel
Detailed Description
Fig. 1 shows an exemplary embodiment of a circuit arrangement according to the present invention, wherein a circuit arrangement 1000 for a plurality of electrical switches for detecting the switching state of the plurality of electrical switches has: a signal evaluation unit 1100; a first switching device 1200 having a digital signal input 1210 and an analog signal output 1220; and a second switching device 1300 having a digital signal input 1210 and an analog signal output 1220. In this case, the signal evaluation unit 1100 has two analog signal inputs 1110, 1120 and one digital signal output 1140. The first switching device 1200 has four circuit arrangements 1250, 1260, 1270, 1280; the second switching device 1300 has four circuit arrangements 1350, 1360, 1370, 1380, wherein each circuit arrangement 1250, 1260, 1270, 1280, 1350, 1360, 1370, 1380 has a corresponding electrical switch 1251, 1261, 1271, 1281, 1351, 1361, 1371, 1381 (not shown in fig. 1 for greater clarity). In this case, the first switching device 1200 is provided for, upon activation of a respective electrical switch 1251, 1261, 1271, 1281 (not shown in fig. 1 for greater clarity) of a respective electrical circuit arrangement 1250, 1260, 1270, 1280 of the respective first switching device 1200, providing a respective output signal on a respective analog signal output 1220; the second switching devices 1300 are provided for providing a respective output signal on the respective analog signal output 1220 upon activation of a respective electrical switch 1351, 1361, 1371, 1381 (not shown in fig. 1 for greater clarity) of a respective electrical circuit arrangement 1350, 1360, 1370, 1380 of the respective second switching device 1300. The signal input terminal 1210 of the first switching device 1200 and the signal input terminal 1210 of the second switching device 1300 are electrically connected to the digital signal output terminal 1140 of the signal evaluation unit 1100, respectively. The signal output 1220 of the first switching device 1200 is electrically connected to the first analog signal input 1110 of the signal evaluation unit 1100. And the signal output 1220 of the second switching device 1200 is electrically connected to the second analog signal input 1120 of the signal evaluation unit 1100. And in this case the four circuit arrangements 1250, 1260, 1270, 1280 of the first switching device 1200 and the four circuit arrangements 1350, 1360, 1370, 1380 of the second switching device 1300, respectively, are formed as two circuit arrangement pairs. Upon activation of one switch of a pair of circuit arrangements, a corresponding identical first electrical output signal is generated. Upon activation of the respective other switch of the pair of circuit arrangements, a respective identical second electrical output signal is generated. In this case, the respective first output signal is different from the respective second output signal. Furthermore, it can be distinguished by means of a clock signal provided on the digital signal output 1140 of the signal evaluation unit 1100 which of the two pairs of circuit arrangements of the respective switching means 1200, 1300 is activated.
Fig. 2 shows an embodiment of the circuit arrangement according to the invention, wherein the circuit arrangement 1000 further has: the signal evaluation unit 1100 has a third signal input 1130 and the first switching device 1200 and the second switching device 1300 have a second signal output 1230. In this case, the second signal output 1230 of the first switching device 1200 and the second signal output 1230 of the second switching device 1300 are electrically connected to the third signal input 1130 of the signal evaluation unit 1100, respectively. And the circuit arrangement 1000 is provided for switching the signal evaluation unit 1100 from the passive state to the active state upon activation of the electrical switches 1251, 1261, 1271, 1281 of each circuit arrangement 1250, 1260, 1270, 1280 of the first switching arrangement 1200 and the electrical switches 1351, 1361, 1371, 1381 of each circuit arrangement 1350, 1360, 1370, 1380 of the second switching arrangement 1300 (not shown in fig. 2 for greater clarity).
Fig. 3 shows an embodiment of the circuit arrangement according to the present invention, wherein the circuit arrangement 1000 (not shown in fig. 3) further comprises: an array of semiconductor elements for each circuit arrangement 1250, 1260, 1270, 1280 of the first switching device 1200 and for each circuit arrangement 1350, 1360, 1370, 1380 of the second switching device 1300. In this case, each array of semiconductor elements is arranged such that upon activation of the respective electrical switch of the respective circuit arrangement 1250, 1260, 1270, 1280 and the respective circuit arrangement 1350, 1360, 1370, 1380, a respective first or second output signal of the pair of circuit arrangements is generated. Which of the pair of circuit arrangements is activated can be distinguished by means of a clock signal provided on the digital signal output 1120 of the signal evaluation unit 1100. In the example of fig. 3, each semiconductor element array has either transistors or diodes. The first electrical circuit arrangement of each circuit arrangement pair of the first switching device 1200 and the second switching device 1300 has a semiconductor element array which differs from the semiconductor element array of the second electrical circuit arrangement of the respective circuit arrangement pair of the respective switching device 1200, 1300.
In this case, the semiconductor element arrays of the first electrical circuit arrangement 1270, 1280 of each circuit arrangement pair of the first switching device 1200 and the first electrical circuit arrangement 1370, 1380 of each circuit arrangement pair of the second switching device 1300 have transistors, whereas the semiconductor element arrays of the second electrical circuit arrangement 1250, 1260 of the respective circuit arrangement pair of the respective first switching device 1200 and the second electrical circuit arrangement 1350, 1360 of the respective circuit arrangement pair of the respective second switching device 1300 have diodes.
Furthermore, the circuit arrangement 1000 has, for each electrical switch 1251, 1261, 1271, 1281, 1351, 1361, 1371, 1381 of each circuit arrangement 1250, 1260, 1270, 1280, 1350, 1360, 1370, 1380, a jitter removal device for removing jitter of the electrical output signal generated when the respective electrical switch is activated. In this case, each of the debouncing devices has an debouncing transistor. And in this case, the collectors of the transistors of the semiconductor element array of the first electrical circuit arrangement of each circuit arrangement pair of the first switching device 1200 and the second switching device 1300 are electrically connected to the bases of the debounce transistors.
Fig. 4 shows an exemplary embodiment of a steering wheel 2000 having a circuit arrangement 1000 according to the present invention, steering wheel 2000 being provided for a motor vehicle (not shown in fig. 4) and having a circuit arrangement 1000 according to the present invention.
The circuit arrangements according to the invention disclosed herein are not limited to the embodiments disclosed separately here, but also comprise respectively other embodiments which function identically, resulting from technically meaningful further combinations of the features described here. In particular, the features and combinations of features mentioned above in the general description of the invention and in the description of the figures and/or shown in the figures alone can be used not only in the combinations explicitly given here, but also in other combinations or alone, without departing from the scope of the invention.
In a particularly preferred embodiment, the circuit arrangement is used for computer-assisted control of technical systems in motor vehicles, but is not limited to this application.
Claims (14)
1. A circuit arrangement for a plurality of electrical switches for detecting the switching state of the plurality of electrical switches, the circuit arrangement comprising:
-a signal evaluation unit for evaluating the signal,
-a first switching device having a digital signal input and an analog signal output, an
-second switching means having a digital signal input and an analog signal output, wherein,
the signal evaluation unit has two analog signal inputs and a digital signal output,
each switching device has four circuit arrangements, wherein each circuit arrangement has one electrical switch, wherein each switching device is provided for providing a respective output signal at a respective analog signal output upon activation of the respective electrical switch of the respective electrical circuit arrangement of the respective switching device,
the signal input end of the first switch device and the signal input end of the second switch device are respectively electrically connected with the digital signal output end of the signal evaluation unit,
the signal output of the first switching device is electrically connected to the first analog signal input of the signal evaluation unit, and
a signal output of the second switching device is electrically connected to a second analog signal input of the signal evaluation unit, and wherein,
the four circuit arrangements of each switching device are each formed as two circuit arrangement pairs, wherein,
upon activation of one switch of a pair of circuit arrangements, a corresponding identical first electrical output signal is generated,
upon activation of the respective other switch of the pair of circuit arrangements, a respective identical second electrical output signal is generated,
wherein the respective first output signals are different from the respective second output signals, and wherein,
by means of a clock signal provided at the digital signal output of the signal evaluation unit, it can be distinguished which of the two pairs of circuit arrangements of the respective switching device is activated.
2. The circuit arrangement according to claim 1,
the signal evaluation unit has a total of four electrical contacts, wherein two of the four electrical contacts function as analog signal inputs and the other electrical contact functions as a digital signal output, and wherein the other of the four electrical contacts functions as an analog and/or digital signal input.
3. The circuit arrangement of claim 1, wherein:
-each switching device has a second signal output, wherein,
a second signal output of the first switching device and a second signal output of the second switching device are each electrically connected to a further signal input of the signal evaluation unit, and,
the circuit arrangement is provided to switch the signal evaluation unit from the passive state into the active state upon activation of the electrical switch of each circuit arrangement of each switching device.
4. The circuit arrangement according to claim 1,
the other signal input of the signal evaluation unit is a digital signal input.
5. The circuit arrangement of claim 1, further comprising:
an array of semiconductor elements for each circuit arrangement of each switching device, wherein,
each semiconductor element array is arranged in such a way that, when the respective electrical switch of a respective pair of electrical circuit arrangements is activated, it can be distinguished by means of a clock signal provided at the digital signal output of the signal evaluation unit, which of the pair of circuit arrangements is activated.
6. The circuit arrangement according to claim 5,
each array of semiconductor elements has either transistors or diodes.
7. The circuit arrangement according to claim 5,
the first electrical circuit arrangement of each circuit arrangement pair of each switching device has an array of semiconductor elements which differs from the array of semiconductor elements of the second electrical circuit arrangement of the respective circuit arrangement pair of the respective switching device.
8. The circuit arrangement according to claim 7,
the semiconductor element array of the first electrical circuit arrangement of each circuit arrangement pair of each switching device has a transistor, whereas the semiconductor element array of the second electrical circuit arrangement of the respective circuit arrangement pair of the respective switching device has a diode.
9. The circuit arrangement of any one of claims 1 to 8, further comprising:
-a debouncing device for each electrical switch of each circuit arrangement for debouncing the first or second electrical output signal generated upon activation of the respective electrical switch.
10. The circuit arrangement according to claim 9,
each debouncing device has a debouncing transistor for debouncing the first or second electrical output signal generated upon activation of the corresponding electrical switch.
11. The circuit arrangement according to claim 9,
the collector of the transistor of the array of semiconductor elements of the first electrical circuit arrangement of each circuit arrangement pair of each switching device is electrically connected to the base of the debounce transistor.
12. The circuit arrangement of claim 2, further comprising:
a third switching device having a digital signal input and an analog signal output, wherein,
the third switching device has a further electrical circuit arrangement, wherein,
each circuit arrangement of the third switching device has an electrical switch, and wherein,
a digital signal input of the third switching device is electrically connected with a digital signal output of the signal evaluation unit, and,
the analog signal output of the third switching device is electrically connected to a further signal input of the signal evaluation unit.
13. The circuit arrangement according to claim 1,
the signal evaluation unit has a microcontroller.
14. A steering wheel for a motor vehicle, characterized in that it has a circuit arrangement according to any one of the preceding claims 1 to 13.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019103338.1 | 2019-02-11 | ||
| DE102019103338.1A DE102019103338B3 (en) | 2019-02-11 | 2019-02-11 | Circuit device for a plurality of electrical switches, for detecting switching states of the plurality of electrical switches as well as a steering wheel having the circuit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212749163U true CN212749163U (en) | 2021-03-19 |
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ID=70681539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922358085.1U Active CN212749163U (en) | 2019-02-11 | 2019-12-24 | Circuit arrangement for a plurality of electrical switches and steering wheel having such a circuit arrangement |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN212749163U (en) |
| DE (1) | DE102019103338B3 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10052908C1 (en) | 2000-10-25 | 2002-08-29 | Siemens Ag | Method and device for recognizing the switching position of a plurality of switches connected to a common input of an electronic unit |
| DE102014001111B3 (en) | 2014-01-28 | 2015-05-21 | Audi Ag | Steering wheel for a motor vehicle and motor vehicle |
-
2019
- 2019-02-11 DE DE102019103338.1A patent/DE102019103338B3/en active Active
- 2019-12-24 CN CN201922358085.1U patent/CN212749163U/en active Active
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| DE102019103338B3 (en) | 2020-06-04 |
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