CN202713135U - Automobile navigator power supply filter circuit - Google Patents
Automobile navigator power supply filter circuit Download PDFInfo
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- CN202713135U CN202713135U CN 201220269857 CN201220269857U CN202713135U CN 202713135 U CN202713135 U CN 202713135U CN 201220269857 CN201220269857 CN 201220269857 CN 201220269857 U CN201220269857 U CN 201220269857U CN 202713135 U CN202713135 U CN 202713135U
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Abstract
Disclosed is an automobile navigator power supply filter circuit, comprising a voltage input terminal, a voltage output terminal, a ripple voltage detection module, an amplification control module, and a filtering starting module, wherein the ripple voltage detection module is used for detecting the ripple voltage of the voltage output terminal and transmitting the detected ripple voltage to the amplification control module; the amplification control module is used for carrying out amplification processing over the ripple voltage detected by the ripple voltage detection module and transmitting the amplified ripple voltage to the filtering starting module; and the filtering starting module is used for controlling the voltage of the voltage output terminal to follow the up and down of the voltage of the voltage input terminal according to the ripple voltage output by the amplification control module. The automobile navigator power supply circuit of the utility model can effectively filter the ripper voltage of various frequencies in the power supply circuit of an automobile navigator. In addition, the automobile navigator power supply filter circuit can effectively filter the ripper voltage of various amplitudes resulting from different loads in the automobile navigator power supply circuit.
Description
Technical field
The utility model relates to power technique fields, relates in particular to a kind of automobile navigation instrument electric source filter circuit.
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Background technology
In existing automobile navigation instrument power supply, normally reduce ripple voltage by the mode that strengthens filter capacitor, but for some larger low-frequency ripple voltage, adopt the mode that strengthens filter capacitor, be difficult to reach the purpose of filtering.And, for the circuit of some topological structure, under the unequally loaded condition, the ripple voltage amplitude of automobile navigation instrument power circuit output end will have very large difference, and for because of the caused ripple voltage of different loads, prior art also fails effectively to be solved always.
The utility model content
Main purpose of the present utility model provides a kind of automobile navigation instrument electric source filter circuit, be intended to the ripple voltage of various frequencies in the filtering automobile navigation instrument power circuit effectively, and in the automobile navigation instrument power circuit because of the ripple voltage of the caused various amplitudes of different loads.
In order to achieve the above object, the utility model proposes a kind of automobile navigation instrument electric source filter circuit, this automobile navigation instrument electric source filter circuit comprises voltage input end, voltage output end, ripple voltage detection module, amplifies control module and filtering startup module, wherein:
Described ripple voltage detection module, an end is connected with described voltage output end, and the other end is connected with described amplification control module, is used for the ripple voltage of described voltage output end is detected, and exports the ripple voltage that detects to described amplification control module;
Described amplification control module, one end is connected with described ripple voltage detection module, the other end starts module with described filtering and is connected, and the ripple voltage that is used for described ripple voltage detection module is detected amplifies processing, and the ripple voltage after will amplifying exports described filtering startup module to;
Described filtering starts module, is connected with described voltage input end, voltage output end and amplification control module respectively, is used for the ripple voltage according to described amplification control module output, controls the voltage stabilization of described voltage output end in the scope of predeterminated voltage value.
Preferably, described ripple voltage detection module comprises the first electric capacity, and an end of described the first electric capacity is connected with described voltage output end, and the other end of described the first electric capacity is connected with described amplification control module.
Preferably, described amplification control module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first triode and the second triode, one end of the first resistance is connected with described ripple voltage detection module, and through the 3rd grounding through resistance, the other end of the first resistance is connected with the base stage of the first triode, the grounded emitter of the first triode, the collector electrode of the first triode starts module with described filtering and is connected, and be connected with the base stage of the second triode and be connected with described ripple voltage detection module through the second resistance through the 4th resistance respectively, the grounded emitter of the second triode, the collector electrode of the second triode starts module with described filtering and is connected, and is connected with described voltage input end through the 5th resistance.
Preferably, described amplification control module also comprises the second electric capacity, and described the second electric capacity is in parallel with the 4th resistance.
Preferably, an end of described the first electric capacity is connected with described voltage output end, and the other end of described the first electric capacity is connected with the base stage of described the first triode and is connected with the collector electrode of described the first triode through described the second resistance through the first resistance respectively.
Preferably, described filtering starts module and comprises the 6th resistance and metal-oxide-semiconductor, one end of described the 6th resistance is connected with described voltage input end, the other end of described the 6th resistance is connected with the collector electrode of the first triode in the described amplification control module, the source electrode of described metal-oxide-semiconductor is connected with described voltage input end, the drain electrode of described metal-oxide-semiconductor is connected with described voltage output end, and the grid of described metal-oxide-semiconductor is connected with the collector electrode of the second triode in the described amplification control module.
Preferably, described metal-oxide-semiconductor is the metal-oxide-semiconductor of P raceway groove.
Preferably, also comprise an over-voltage suppression diode, described over-voltage suppression diode and described the first Capacitance parallel connection when being used for voltage when described voltage input end greater than the predeterminated voltage value, are controlled the voltage stabilization of described voltage output end on described predeterminated voltage value.
The automobile navigation instrument electric source filter circuit that the utility model proposes, adopt the ripple voltage detection module that the ripple voltage of voltage output end is detected, and export the ripple voltage that detects to the amplification control module, amplify control module the ripple voltage that the ripple voltage detection module detects is amplified processing, and the ripple voltage after will amplifying exports filtering startup module to, filtering starts module according to the ripple voltage that amplifies control module output, suppresses rising or the decline of the voltage follower circuit input terminal voltage of circuit output end.The utility model is the frequency ripple voltage of various frequencies in the filtering automobile navigation instrument power circuit effectively, and effectively in the filtering automobile navigation instrument power circuit because of the ripple voltage of the caused various amplitudes of different loads, simultaneously, the utility model have advantages of also that circuit structure is simple, cost is low, reliability is high, good stability and be easy to realize.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model automobile navigation instrument electric source filter circuit preferred embodiment.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Further specify the technical solution of the utility model below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Fig. 1 is the electrical block diagram of the utility model automobile navigation instrument electric source filter circuit preferred embodiment.
With reference to Fig. 1, the utility model automobile navigation instrument electric source filter circuit comprises voltage input end 1, voltage output end 2, ripple voltage detection module 3, amplifies control module 4 and filtering startup module 5.
Concrete, an end of ripple voltage detection module 3 is connected with voltage output end 2, and the other end of ripple voltage detection module 3 is connected with amplification control module 4; An end that amplifies control module 4 is connected with ripple voltage detection module 3, and the other end that amplifies control module 4 starts module 5 with filtering and is connected; Filtering starts module 5 and is connected with voltage input end 1, voltage output end 2 and amplification control module 4 respectively.
Ripple voltage detection module 3 is used for the ripple voltage of voltage output end 2 is detected, and exports the ripple voltage that detects to amplification control module 4; Amplify control module 4 and amplify processing for the ripple voltage that ripple voltage detection module 3 is detected, and the ripple voltage after will amplifying exports filtering startup module 5 to; Filtering starts module 5 and is used for according to the ripple voltage that amplifies control module 4 outputs, and the voltage stabilization of control voltage output end 2 is in the scope of predeterminated voltage value.
Wherein, ripple voltage detection module 3 comprises the first capacitor C 1;
Amplify control module 4 and comprise the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the second capacitor C 2, the first triode Q1 and the second triode Q2.Wherein, the second resistance R 2 is the collector bias resistance of the first triode Q1, and the 3rd resistance R 3 is the negative feedback resistor of the first triode Q1, and the first triode Q1 and the second triode Q2 are the NPN triode of same model;
Filtering starts module 5 and comprises the 6th resistance R 6 and metal-oxide-semiconductor Q3, and this metal-oxide-semiconductor Q3 is the metal-oxide-semiconductor of P raceway groove.
Concrete, an end of the first capacitor C 1 is connected with voltage output end 2 in the ripple voltage detection module 3, and the other end of the first capacitor C 1 respectively the first resistance R 1 in amplifying control module 4 is connected with the base stage of the first triode Q1 and the second resistance R 2 in amplification control module 4 is connected with the collector electrode of the first triode Q1;
Amplify an end ground connection of the 3rd resistance R 3 in the control module 4, the other end of the 3rd resistance R 3 is connected with the base stage of the first triode Q1 through the first resistance R 1, the grounded emitter of the first triode Q1, the collector electrode of the first triode Q1 is connected with the base stage of the second triode Q2 and the 6th resistance R 6 that starts in the module 5 through filtering is connected with voltage input end 1 through the 4th resistance R 4 respectively, the grounded emitter of the second triode Q2, the collector electrode of the second triode Q2 is connected with the grid that filtering starts metal-oxide-semiconductor Q3 in the module 5, and be connected with voltage input end 1 through the 5th resistance R 5, the second capacitor C 2 is in parallel with the 4th resistance R 4;
The end that filtering starts the 6th resistance R 6 in the module 5 is connected with voltage input end 1, the other end of the 6th resistance R 6 is connected with the collector electrode of the first triode Q1 in the amplification control module 4, the source electrode of metal-oxide-semiconductor Q3 is connected with voltage input end 1, the drain electrode of metal-oxide-semiconductor Q3 is connected with voltage output end 2, and the grid of metal-oxide-semiconductor Q3 is connected with the collector electrode of the second triode Q2 in the amplification control module 4.
Wherein, the second triode Q2 in the amplification control module 4 and the 5th resistance R 5 consist of the gate driver circuit of metal-oxide-semiconductor Q3, with the conducting degree of depth of control metal-oxide-semiconductor Q3; The first triode Q1 is the inverting amplifier of the ripple voltage of voltage output end 2, the ripple voltage that is detected by the first capacitor C 1 is added to the base stage of the first triode Q1 by the first resistance R 1, the first triode Q1 carries out anti-phase amplification to this ripple voltage, ripple voltage after the anti-phase amplification is through the collector electrode output of the first triode Q1, be added to the base stage of the second triode Q2 through the 4th resistance R 4, the ripple voltage that the second triode Q2 comes in to input carries out anti-phase amplification again, ripple voltage after the anti-phase amplification exports the grid of metal-oxide-semiconductor Q3 to from the collector electrode of the second triode Q2, with the conducting degree of depth of control metal-oxide-semiconductor Q3.
The operation principle of the utility model automobile navigation instrument electric source filter circuit specifically describes as follows:
(1) when voltage stabilization that voltage input end 1 is inputted the voltage ripple-free voltage of the voltage output end 2 (time), the utility model automobile navigation instrument electric source filter circuit is in the quiescent operation state, amplify that the node voltage between the second resistance R 1 and the 3rd resistance R 3 equals the base stage of the first triode Q1 and the PN junction voltage Vbe between the emitter in the control module 4 this moment, thereby this moment the first triode Q1 collector voltage Vc=(R3+R2)/R3* Vbe, thereby so that the collector voltage Vc of the first triode Q1 is greater than the PN junction voltage Vbe between its base stage and the emitter, and owing to the collector electrode of the first triode Q1 is connected with the base stage of the second triode Q2 through the 4th resistance R 4, so that the base voltage Vb of the second triode Q2 equals the collector voltage Vc of the first triode Q1, thereby so that the base voltage Vb of the second triode Q2 is greater than the PN junction voltage Vbe between its base stage and the emitter, thereby so that the second triode Q2 is in the saturation conduction state, thereby so that the metal-oxide-semiconductor Q3 of this moment is in the state of complete conducting;
When the voltage of (2) inputting when voltage input end 1 has fluctuation (when the voltage of voltage output end 2 has ripple voltage), or when causing voltage output end 2 to produce the different ripple voltage of various amplitudes because of the load variations of voltage output end 2, the first capacitor C 1(ripple voltage Detection capacitance) ripple voltage of voltage output end 2 detected, and the ripple voltage that detects is coupled to the base stage of the first triode Q1, this ripple voltage is after the anti-phase amplification of the first triode Q1 and the second triode Q2, export the grid of metal-oxide-semiconductor Q3 to from the collector electrode of the second triode Q2, with the conducting degree of depth of control metal-oxide-semiconductor Q3.
Concrete, when the voltage of inputting when voltage input end 1 rises (ripple voltage rising), the grid voltage of metal-oxide-semiconductor Q3 rises, thereby so that the conducting degree of depth of metal-oxide-semiconductor Q3 reduces, be that path resistance between voltage input end 1 and the voltage output end 2 strengthens, thus suppressed voltage output end 2 voltage follow voltage input end 1 voltage rising and rise;
When voltage drop that voltage input end 1 is inputted (ripple voltage decline), the grid voltage of metal-oxide-semiconductor Q3 descends, thereby so that the conducting degree of depth of metal-oxide-semiconductor Q3 increases, namely reduced the path resistance between voltage input end 1 and the voltage output end 2, thus suppressed voltage output end 2 voltage follow voltage input end 1 voltage decline and descend.
The utility model automobile navigation instrument electric source filter circuit also comprises over-voltage suppression diode D1, this over-voltage suppression diode D1 is in parallel with the first capacitor C 1, when this over-voltage suppression diode D1 is used for voltage when voltage input end 1 greater than the predeterminated voltage value, the voltage stabilization of control voltage output end 2 is on the predeterminated voltage value, and this moment, the utility model automobile navigation instrument electric source filter circuit was equivalent to serial regulating circuit.
The utility model automobile navigation instrument electric source filter circuit, adopt the ripple voltage detection module that the ripple voltage of voltage output end is detected, and export the ripple voltage that detects to the amplification control module, amplify control module the ripple voltage that the ripple voltage detection module detects is amplified processing, and the ripple voltage after will amplifying exports filtering startup module to, filtering starts module according to the ripple voltage that amplifies control module output, suppresses rising or the decline of the voltage follower circuit input terminal voltage of circuit output end.The utility model is the frequency ripple voltage of various frequencies in the filtering circuit effectively, and effectively in the filtering circuit because of the ripple voltage of the caused various amplitudes of different loads, simultaneously, the utility model have advantages of also that circuit structure is simple, cost is low, reliability is high, good stability and be easy to realize.
The above only is preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (8)
1. an automobile navigation instrument electric source filter circuit comprises voltage input end and voltage output end, it is characterized in that, also comprise the ripple voltage detection module, amplify control module and filtering startup module, wherein:
Described ripple voltage detection module, an end is connected with described voltage output end, and the other end is connected with described amplification control module, is used for the ripple voltage of described voltage output end is detected, and exports the ripple voltage that detects to described amplification control module;
Described amplification control module, one end is connected with described ripple voltage detection module, the other end starts module with described filtering and is connected, and the ripple voltage that is used for described ripple voltage detection module is detected amplifies processing, and the ripple voltage after will amplifying exports described filtering startup module to;
Described filtering starts module, is connected with described voltage input end, voltage output end and amplification control module respectively, is used for the ripple voltage according to described amplification control module output, controls the voltage stabilization of described voltage output end in the scope of predeterminated voltage value.
2. automobile navigation instrument electric source filter circuit according to claim 1, it is characterized in that, described ripple voltage detection module comprises the first electric capacity, and an end of described the first electric capacity is connected with described voltage output end, and the other end of described the first electric capacity is connected with described amplification control module.
3. automobile navigation instrument electric source filter circuit according to claim 1, it is characterized in that, described amplification control module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first triode and the second triode, one end of the first resistance is connected with described ripple voltage detection module, and through the 3rd grounding through resistance, the other end of the first resistance is connected with the base stage of the first triode, the grounded emitter of the first triode, the collector electrode of the first triode starts module with described filtering and is connected, and be connected with the base stage of the second triode and be connected with described ripple voltage detection module through the second resistance through the 4th resistance respectively, the grounded emitter of the second triode, the collector electrode of the second triode starts module with described filtering and is connected, and is connected with described voltage input end through the 5th resistance.
4. automobile navigation instrument electric source filter circuit according to claim 3 is characterized in that, described amplification control module also comprises the second electric capacity, and described the second electric capacity is in parallel with the 4th resistance.
5. according to claim 2 or 3 described automobile navigation instrument electric source filter circuits, it is characterized in that, one end of described the first electric capacity is connected with described voltage output end, and the other end of described the first electric capacity is connected with the base stage of described the first triode and is connected with the collector electrode of described the first triode through described the second resistance through the first resistance respectively.
6. automobile navigation instrument electric source filter circuit according to claim 5, it is characterized in that, described filtering starts module and comprises the 6th resistance and metal-oxide-semiconductor, one end of described the 6th resistance is connected with described voltage input end, the other end of described the 6th resistance is connected with the collector electrode of the first triode in the described amplification control module, the source electrode of described metal-oxide-semiconductor is connected with described voltage input end, the drain electrode of described metal-oxide-semiconductor is connected with described voltage output end, and the grid of described metal-oxide-semiconductor is connected with the collector electrode of the second triode in the described amplification control module.
7. automobile navigation instrument electric source filter circuit according to claim 6 is characterized in that, described metal-oxide-semiconductor is the metal-oxide-semiconductor of P raceway groove.
8. automobile navigation instrument electric source filter circuit according to claim 7, it is characterized in that, also comprise an over-voltage suppression diode, described over-voltage suppression diode and described the first Capacitance parallel connection, when being used for voltage when described voltage input end greater than the predeterminated voltage value, control the voltage stabilization of described voltage output end on described predeterminated voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220269857 CN202713135U (en) | 2012-06-09 | 2012-06-09 | Automobile navigator power supply filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220269857 CN202713135U (en) | 2012-06-09 | 2012-06-09 | Automobile navigator power supply filter circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202713135U true CN202713135U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220269857 Expired - Fee Related CN202713135U (en) | 2012-06-09 | 2012-06-09 | Automobile navigator power supply filter circuit |
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| CN (1) | CN202713135U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167919A (en) * | 2014-08-14 | 2014-11-26 | 深圳市创维群欣安防科技有限公司 | Device for controlling flyback power source cross load output voltages |
| CN104333238A (en) * | 2014-10-17 | 2015-02-04 | 重庆金宏汽车电子有限公司 | Power supply circuit for navigation device |
| CN106230402A (en) * | 2016-08-26 | 2016-12-14 | 江苏伟屹电子有限公司 | The special dynamic quick filter circuit of vortex-shedding meter |
-
2012
- 2012-06-09 CN CN 201220269857 patent/CN202713135U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167919A (en) * | 2014-08-14 | 2014-11-26 | 深圳市创维群欣安防科技有限公司 | Device for controlling flyback power source cross load output voltages |
| CN104167919B (en) * | 2014-08-14 | 2017-02-22 | 深圳市创维群欣安防科技股份有限公司 | Device for controlling flyback power source cross load output voltages |
| CN104333238A (en) * | 2014-10-17 | 2015-02-04 | 重庆金宏汽车电子有限公司 | Power supply circuit for navigation device |
| CN106230402A (en) * | 2016-08-26 | 2016-12-14 | 江苏伟屹电子有限公司 | The special dynamic quick filter circuit of vortex-shedding meter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20140609 |