CN209748524U - Automobile chip preceding stage output circuit - Google Patents
Automobile chip preceding stage output circuit Download PDFInfo
- Publication number
- CN209748524U CN209748524U CN201920232438.0U CN201920232438U CN209748524U CN 209748524 U CN209748524 U CN 209748524U CN 201920232438 U CN201920232438 U CN 201920232438U CN 209748524 U CN209748524 U CN 209748524U
- Authority
- CN
- China
- Prior art keywords
- signal
- resistor
- electrically connected
- chip
- automobile chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model provides an automobile chip preceding stage output circuit, include: the signal filtering module is respectively and electrically connected with the signal output end of the ignition switch and the signal input end of the automobile chip; the signal voltage stabilizing module is electrically connected with the signal output end of the signal filtering module and the signal input end of the automobile chip respectively; and the signal amplification module is respectively and electrically connected with the signal output end of the signal voltage stabilizing module and the signal input end of the automobile chip. The utility model discloses a design of signal filtering module, directly filter the signal between ignition switch and the automobile chip, and then the effectual filtering effect who improves automobile chip preceding stage output circuit, mutual interference between each chip circuit has been prevented, through the design of signal voltage stabilizing module, the effectual signal to transmission on the automobile chip has played the steady voltage effect, the stability of overall circuit structure has been improved, through the design of signal amplification module, signal transmission effect in the automobile chip preceding stage output circuit has been improved.
Description
Technical Field
The utility model relates to an electronic circuit technical field, in particular to car chip preceding stage output circuit.
Background
Along with the rapid development of the automobile electrical and electronic technology, the automobile electrical functions are more and more complex, the configuration is more and more abundant, and corresponding electrical parts are increased, so that the functional requirements of the electrical parts of the whole automobile are more and more strong, the integrated chip generally replaces the circuit formed by the original simple components, and higher requirements are provided for the electromagnetic environment of the whole automobile. Because the electric appliances of the whole vehicle can not avoid mutual interference during working, an effective filter circuit needs to be placed in an integrated power input circuit of each electric appliance circuit to filter the interference generated during the working of the whole vehicle and prevent an integrated chip of an electric appliance part from entering a self-protection program or ablation, and therefore the problem of the filter efficiency of a preceding stage output circuit of a vehicle chip is more and more emphasized by people.
In the use process of the prior automobile chip preceding-stage output circuit, the filtering effect of signals on an automobile chip is poor, the interference among all automobile chip circuits cannot be effectively protected, and the stability of the whole automobile circuit structure is reduced.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides an aim at provides an automobile chip preceding stage output circuit that filtering effect is high.
An automotive chip preceding stage output circuit, comprising:
The signal filtering module is respectively electrically connected with a signal output end of the ignition switch, a power supply signal input end and a signal input end of the automobile chip and is used for filtering a power supply signal sent to the automobile chip;
The signal voltage stabilizing module is respectively and electrically connected with the signal output end of the signal filtering module and the signal input end of the automobile chip, and is used for performing voltage stabilizing processing on signals between the signal filtering module and the automobile chip;
The signal amplification module is respectively and electrically connected with the signal output end of the signal voltage stabilizing module and the signal input end of the automobile chip, and the signal amplification module is used for amplifying signals between the signal voltage stabilizing module and the automobile chip.
above-mentioned automobile chip preceding stage output circuit, through the design of signal filtering module, it is direct right ignition switch with signal between the automobile chip carries out the filtering, and then effectual improvement automobile chip preceding stage output circuit's filter effect has prevented the mutual interference between each chip circuit, through the design of signal voltage stabilizing module, it is effectual right the signal of transmission has played the voltage stabilizing effect on the automobile chip, has improved the stability of overall circuit structure, through the design of signal amplification module has improved signal transmission effect in the automobile chip preceding stage output circuit.
furthermore, the signal filtering module comprises a first capacitor and a first diode which are respectively electrically connected with the output end of the ignition switch, a first resistor which is connected with the first diode in series, a second capacitor which is arranged between the first diode and the first resistor, and a second resistor and a third capacitor which are respectively connected with the first resistor and the automobile chip in series.
Further, the signal voltage stabilizing module comprises a second diode electrically connected with the signal output end of the ignition switch, a first triode in series connection with the second diode, and a third resistor in series connection with the first triode.
Furthermore, the first triode is an NPN-type triode, a collector of the first triode is electrically connected with the second diode and the signal amplification module respectively, a base of the first triode is connected in series with a seventh resistor, an output end of the seventh resistor is electrically connected with a tenth pin of the automobile chip, and an emitter of the first triode is electrically connected with the third resistor.
Further, the signal amplification module comprises a fourth resistor electrically connected with the signal voltage stabilization module, a fifth resistor and a second triode respectively connected with the fourth resistor in series, and a sixth resistor connected with the second triode in series.
furthermore, the second triode is a PNP-type triode, a collector of the second triode is electrically connected to the sixth resistor, a base of the second triode is electrically connected to the fourth resistor and the fifth resistor, respectively, and an emitter of the second triode is electrically connected to the fifth resistor.
Furthermore, a filtering unit is further arranged between the signal amplification module and the automobile chip, and the output end of the filtering unit is electrically connected with the input end of the twenty-third pin of the automobile chip.
Furthermore, the filtering unit comprises an eighth resistor and a fourth capacitor, the eighth resistor and the fourth capacitor are electrically connected to a twenty-third pin of the automobile chip, and output ends of the eighth resistor and the fourth capacitor are electrically connected to the ground.
Further, the resistance of the eighth resistor is 10K Ω, and the capacity of the fourth capacitor is 0.001 uf.
Further, the resistance values of the first resistor and the second resistor are both 47K Ω, the capacities of the first capacitor and the second capacitor are both 0.01uf, and the capacity of the third capacitor is 0.1 uf.
Drawings
fig. 1 is a schematic circuit structure diagram of a preceding stage output circuit of an automobile chip according to a first embodiment of the present invention;
Fig. 2 is a schematic circuit structure diagram of a preceding stage output circuit of an automobile chip according to a second embodiment of the present invention;
Description of the symbols of the main elements
| automobile chip preceding stage output circuit | 100 | Signal voltage stabilization module | 10 |
| Signal amplification module | 20 | Filter unit | 30 |
| First capacitor | C1 | Second capacitor | C3 |
| Third capacitor | C4 | fourth capacitor | C64 |
| A first resistor | R1 | Second resistance | R2 |
| Third resistance | R22 | Fourth resistor | R16 |
| Fifth resistor | R15 | Sixth resistor | R18 |
| seventh resistor | R20 | Eighth resistor | R17 |
| First diode | D1 | Second diode | D2 |
| A first triode | Q1 | Second triode | Q3 |
| automobile chip | IC2 | Ignition switch | B29 |
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
it will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a first embodiment of the present invention provides an automotive chip pre-stage output circuit 100, including:
the signal filtering module is respectively and electrically connected with the signal output end and the power signal input end of the ignition switch B29 and the signal input end of the automobile chip IC2, and the signal filtering module is used for filtering the power signal sent to the automobile chip IC 2.
And the signal voltage stabilizing module 10 is respectively and electrically connected with the signal output end of the signal filtering module and the signal input end of the automobile chip IC2, and the signal voltage stabilizing module 10 is used for performing voltage stabilizing processing on signals between the signal filtering module and the automobile chip IC 2.
The signal amplification module 20 is electrically connected to the signal output end of the signal voltage stabilizing module 10 and the signal input end of the automobile chip IC2, respectively, and the signal amplification module 20 is configured to amplify signals between the signal voltage stabilizing module 10 and the automobile chip IC 2.
Specifically, the signal filtering module includes a first capacitor C1 and a first diode D1 respectively electrically connected to the output end of the ignition switch B29, a first resistor R1 connected in series with the first diode D1, a second capacitor C3 arranged between the first diode D1 and the first resistor R1, and a second resistor R2 and a third capacitor C4 respectively connected in series between the first resistor R1 and the vehicle chip IC 2.
In this embodiment, the signal regulator module 10 includes a second diode D2 electrically connected to the signal output terminal of the ignition switch B29, a first transistor Q1 connected in series with the second diode D2, and a third resistor R22 connected in series with the first transistor Q1.
In addition, in this embodiment, the first triode Q1 is an NPN type triode, a collector of the first triode Q1 is electrically connected to the second diode D2 and the signal amplification module 20, a base of the first triode Q1 is connected in series to a seventh resistor R20, an output end of the seventh resistor R20 is electrically connected to a tenth pin of the automobile chip IC2, and an emitter of the first triode Q1 is electrically connected to the third resistor R22.
Further, the signal amplification module 20 includes a fourth resistor R16 electrically connected to the signal voltage stabilization module 10, a fifth resistor R15 and a second triode Q3 respectively connected in series with the fourth resistor R16, and a sixth resistor R18 connected in series with the second triode Q3, wherein a resistance of the fourth resistor R16 is 3.6K Ω, a resistance of the fifth resistor R15 is 22K Ω, and a resistance of the sixth resistor R18 is 30K Ω.
The second triode Q3 adopts PNP type triode, and the collector of the second triode Q3 with the sixth resistor R18 electric connection, the base of the second triode Q3 respectively with the fourth resistor R16 with the fifth resistor R15 electric connection, the projecting pole of the second triode Q3 with the fifth resistor R15 electric connection.
Preferably, the resistances of the first resistor R1 and the second resistor R2 are both 47K Ω, the capacities of the first capacitor C1 and the second capacitor C3 are both 0.01uf, and the capacity of the third capacitor C4 is 0.1 uf.
In this embodiment, the voltage VI filtered by the first capacitor C1 includes a dc component VI (av) and an ac component, and if the ac component is mainly represented by a maximum value VI1m of a fundamental component, the dc component and the ac component of the output voltage VO can be obtained as follows:
Wherein R ═ R1// R2, ω is the fundamental angular frequency of the contact bounce voltage, and as can be seen from equation (2), in order to obtain better filtering effect, 1/(ω C4) < R' should be taken, and in this case, equation (2) can be simplified as:
From (1), when the ignition switch B29 is turned on, the dc voltage inputted to the thirty-second pin of the car chip IC2 is half of the ignition voltage, which is about 6.5V. From (3), under the condition that ω is unchanged, the larger C4 and R' are, the better the filtering effect is, but the sizes of R2 and C4 determine the length of charging and discharging time, and if the charging time is long, the longer the instrument display data is after ignition is, and the driver complaints can be caused. Tests have shown that a delay of less than 3.5ms is preferable here, so the parameters of C4 and R2 are finally selected as: 0.1uF and 47K Ω. The interrelationship of C4, R2 and T is shown in Table 5;
Wherein, the charge-discharge time calculation formula is as follows:
Where VCC is 6.5V and Vt is the turn-on threshold voltage of 3.3V. According to the formula (4), t corresponding to different R2 and C4 is obtained.
In this embodiment, through the design of signal filtering module, it is direct right ignition switch B29 with signal between the automobile chip IC2 filters, and then effectual improvement the filtering effect of automobile chip preceding stage output circuit 100 has prevented the mutual interference between each chip circuit, through the design of signal voltage stabilization module 10, it is effectual right the signal of transmission has played the steady voltage effect on the automobile chip IC2, has improved the stability of overall circuit structure, through the design of signal amplification module 20 has improved the signal transmission effect in the automobile chip preceding stage output circuit 100.
please refer to fig. 2, which is a schematic circuit diagram of a pre-stage output circuit 100 of an automobile chip provided in the second embodiment of the present invention, the second embodiment is substantially the same as the first embodiment, and the difference is that, in this embodiment, a filtering unit 30 is further disposed between the signal amplification module 20 and the automobile chip IC2, an output end of the filtering unit 30 is electrically connected to an input end of a twenty-third pin of the automobile chip IC2, and by the design of the filtering unit 30, a filtering effect is effectively achieved on an amplified signal, so that a filtering effect on the signal in the pre-stage output circuit 100 of the automobile chip is further improved, and an anti-interference capability between chip circuits is improved.
Specifically, the filtering unit includes an eighth resistor R17 and a fourth capacitor C64, the eighth resistor R17 and the fourth capacitor C64 are both electrically connected to a twenty-third pin of the vehicle chip IC2, and output ends of the eighth resistor R17 and the fourth capacitor C64 are both electrically connected to ground, preferably, a resistance of the eighth resistor R17 is 10K Ω, and a capacity of the fourth capacitor C64 is 0.001 uf.
The above-described embodiments describe the technical principles of the present invention, and these descriptions are only for the purpose of explaining the principles of the present invention, and should not be interpreted as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. The utility model provides an automobile chip preceding stage output circuit which characterized in that includes:
The signal filtering module is respectively electrically connected with a signal output end of the ignition switch, a power supply signal input end and a signal input end of the automobile chip and is used for filtering a power supply signal sent to the automobile chip;
The signal voltage stabilizing module is respectively and electrically connected with the signal output end of the signal filtering module and the signal input end of the automobile chip, and is used for performing voltage stabilizing processing on signals between the signal filtering module and the automobile chip;
the signal amplification module is respectively and electrically connected with the signal output end of the signal voltage stabilizing module and the signal input end of the automobile chip, and the signal amplification module is used for amplifying signals between the signal voltage stabilizing module and the automobile chip.
2. The pre-stage output circuit of claim 1, wherein the signal filtering module comprises a first capacitor and a first diode electrically connected to the output terminal of the ignition switch, respectively, a first resistor connected in series with the first diode, a second capacitor disposed between the first diode and the first resistor, and a second resistor and a third capacitor connected in series between the first resistor and the automobile chip, respectively.
3. The pre-stage output circuit of claim 1, wherein the signal regulator module comprises a second diode electrically connected to the signal output terminal of the ignition switch, a first transistor in series with the second diode, and a third resistor in series with the first transistor.
4. the pre-stage output circuit of claim 3, wherein the first triode is an NPN triode, a collector of the first triode is electrically connected to the second diode and the signal amplification module, a base of the first triode is serially connected to a seventh resistor, an output of the seventh resistor is electrically connected to a tenth pin of the automotive chip, and an emitter of the first triode is electrically connected to the third resistor.
5. The pre-stage output circuit of claim 1, wherein the signal amplification module comprises a fourth resistor electrically connected to the signal regulator module, a fifth resistor and a second transistor respectively connected in series with the fourth resistor, and a sixth resistor connected in series with the second transistor.
6. The pre-stage output circuit of claim 5, wherein the second transistor is a PNP transistor, a collector of the second transistor is electrically connected to the sixth resistor, a base of the second transistor is electrically connected to the fourth resistor and the fifth resistor, respectively, and an emitter of the second transistor is electrically connected to the fifth resistor.
7. The pre-stage output circuit of the automobile chip as claimed in claim 1, wherein a filter unit is further disposed between the signal amplification module and the automobile chip, and an output terminal of the filter unit is electrically connected to an input terminal of a twenty-third pin of the automobile chip.
8. The pre-stage output circuit for an automobile chip as claimed in claim 7, wherein the filter unit includes an eighth resistor and a fourth capacitor, the eighth resistor and the fourth capacitor are both electrically connected to the twenty-third pin of the automobile chip, and the output terminals of the eighth resistor and the fourth capacitor are both electrically connected to ground.
9. The pre-stage output circuit of claim 8, wherein the eighth resistor has a resistance of 10K Ω, and the fourth capacitor has a capacitance of 0.001 uf.
10. The pre-stage output circuit of the automobile chip as claimed in claim 2, wherein the first resistor and the second resistor have a resistance of 47K Ω, the first capacitor and the second capacitor have a capacitance of 0.01uf, and the third capacitor has a capacitance of 0.1 uf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920232438.0U CN209748524U (en) | 2019-02-22 | 2019-02-22 | Automobile chip preceding stage output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920232438.0U CN209748524U (en) | 2019-02-22 | 2019-02-22 | Automobile chip preceding stage output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209748524U true CN209748524U (en) | 2019-12-06 |
Family
ID=68707764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920232438.0U Active CN209748524U (en) | 2019-02-22 | 2019-02-22 | Automobile chip preceding stage output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209748524U (en) |
-
2019
- 2019-02-22 CN CN201920232438.0U patent/CN209748524U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101334429B (en) | Surge electric current test circuit | |
| CN104122970A (en) | Power circuit | |
| CN209748524U (en) | Automobile chip preceding stage output circuit | |
| CN203785780U (en) | Audio signal detection circuit and audio signal processing circuit | |
| CN207677708U (en) | There is source crystal oscillator filter circuit module | |
| CN205793154U (en) | Earphone drive circuit and electronic equipment | |
| CN103368129A (en) | Overvoltage protection circuit and electronic device with same | |
| CN211505800U (en) | Automobile switch detection working circuit structure | |
| CN100592626C (en) | Surge current suppressing circuit and audio product using the same | |
| CN208479168U (en) | A kind of under-voltage protecting circuit | |
| CN210624841U (en) | Reset circuit, control circuit and air conditioner | |
| CN103457233A (en) | Voltage protecting circuit | |
| CN213661578U (en) | Negative voltage protection circuit | |
| CN207281638U (en) | A kind of accurate voltage-stabilizing circuit | |
| CN206490464U (en) | Portable power source charging device | |
| CN115220510B (en) | Constant-voltage current-limiting driving circuit, electronic control unit and vehicle | |
| CN218273128U (en) | Temperature and humidity detection circuit based on duty ratio, control circuit and electronic equipment | |
| CN220342037U (en) | Lightning-stroke-resistant surge circuit | |
| CN214069894U (en) | Feedback regulation circuit, multiple input and output controller and ultrasonic equipment | |
| CN215222456U (en) | A switch circuit, bluetooth headset and electronic equipment for bluetooth headset | |
| CN220234649U (en) | IC power-on reset circuit | |
| CN110763994A (en) | Automobile switch detection working circuit structure | |
| CN215154253U (en) | Low-side output circuit with current limiting function | |
| CN218783587U (en) | Charge pal's charge-discharge circuit and terminal equipment | |
| CN110045651B (en) | Electric automobile controller digital input circuit of compatible positive negative accuse of adjustable threshold value |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |