CN202512464U - Precise voltage stabilizing circuit for singlechip - Google Patents
Precise voltage stabilizing circuit for singlechip Download PDFInfo
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- CN202512464U CN202512464U CN2012201162828U CN201220116282U CN202512464U CN 202512464 U CN202512464 U CN 202512464U CN 2012201162828 U CN2012201162828 U CN 2012201162828U CN 201220116282 U CN201220116282 U CN 201220116282U CN 202512464 U CN202512464 U CN 202512464U
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Abstract
The utility model provides a precise voltage stabilizing circuit for a singlechip. The precise voltage stabilizing circuit comprises a main working circuit which is connected with the singlechip, wherein the main working circuit comprises an operational amplifier U1 and a triode Q2; the output end of a reference power supply of the singlechip is connected with a reverse-phase input end of the operational amplifier U1 through a resistor R7, the same-phase input end of the operational amplifier U1 is grounded through a resistor R8, and the output end of the operational amplifier U1 is connected with a base electrode of the triode Q2 through a resistor R10; an emission electrode of the triode Q2 is connected with power supply voltage of the main working circuit; the collector electrode of the triode Q2 is connected with a power supply input end of the singlechip; and the power supply input end of the singlechip is provided with initial power supply voltage. The precious voltage stabilizing circuit for a singlechip disclosed by the utility model has the advantages of low cost compared with that of the voltage stabilizing circuit for the traditional singlechip and same voltage stabilizing effect compared with an LDO (low drop output regulator), and can meet power supply requirements of the singlechip.
Description
Technical field
The utility model belongs to the electronic circuit technology field, relates to a kind of mu balanced circuit, is specifically related to a kind of single-chip microcomputer and uses accurate mu balanced circuit.
Background technology
Single-chip microcomputer complete machine power supply is very important in single-chip microcomputer is used the time.Because single-chip microcomputer not only requires voltage, electric current, energy consumption, also have the requirement of electrification reset, so power supply not only will provide stable voltage, sufficient power supply, and requires power source voltage fast Time Created, power consumption is low.Common microcontroller power supply feed circuit can adopt LDO (Low dropout regulator, low pressure difference linear voltage regulator), DC/DC (DC-DC power supply) or stabilivolt mu balanced circuit.But the circuit cost of LDO and DC/DC is all higher, and the voltage regulation result of stabilivolt mu balanced circuit and consistance are relatively poor.
The utility model content
The shortcoming of prior art in view of the above, the purpose of the utility model is to provide a kind of single-chip microcomputer to use accurate mu balanced circuit, in order to rationally to measure the characteristic of cooperation wireless channel exactly.
For realizing above-mentioned purpose and other relevant purposes, the utility model provides a kind of single-chip microcomputer to use accurate mu balanced circuit.
A kind of single-chip microcomputer is used accurate mu balanced circuit, and said single-chip microcomputer comprises the main operating circuit that links to each other with single-chip microcomputer with accurate mu balanced circuit; Said main operating circuit comprises amplifier U1 and triode Q2; The reference power supply output terminal of single-chip microcomputer connects the inverting input of amplifier U1 through a resistance R 7, and the in-phase input end of amplifier U1 is through a resistance R 8 ground connection, and the output terminal of amplifier U1 connects the base stage of triode Q2 through a resistance R 10; The emitter of triode Q2 connects the supply voltage of main operating circuit; The collector of triode Q2 connects the power input of single-chip microcomputer; The power input of single-chip microcomputer has the initial piezoelectric voltage that goes up.
As a kind of preferred version of the utility model, the collector of said triode Q2 is through a Voltage stabilizing module ground connection; Said Voltage stabilizing module is made up of the stabilivolt and the electric capacity of parallel connection.
As the another kind of preferred version of the utility model, the base stage of said triode Q2 connects the emitter of triode Q2 through a resistance R 4.
As another preferred version of the utility model, be connected a filter capacitor C1 between the output terminal of the inverting input of said amplifier U1 and amplifier U1; The in-phase input end of amplifier U1 links to each other with the collector of triode Q2 through a resistance R 9.
As another preferred version of the utility model, the said initial piezoelectric voltage that goes up is provided by the circuit that initially powers on, and the said circuit that initially powers on comprises resistance R 3, R5, stabilivolt Z2, capacitor C 3 and diode D1; One termination voltage input end of said resistance R 3, the end of the other end connecting resistance R5 of resistance R 3, the other end ground connection of resistance R 5; Said stabilivolt Z2 and capacitor C 3 are all parallelly connected with resistance R 5; The other end of said resistance R 3 also connects the positive pole of diode D1; The negative pole of said diode D1 connects the power input of single-chip microcomputer.
As another preferred version of the utility model, said single-chip microcomputer also comprises the overvoltage crowbar that links to each other with the emitter of triode Q2 with accurate mu balanced circuit; Said overvoltage crowbar comprises a triode Q1; The collector of triode Q1 connects voltage input end through a resistance R 1; The emitter of triode Q1 connects the emitter of said triode Q2; The base stage of triode Q1 is through a voltage stabilizer Z1 ground connection, and the base stage of triode Q1 also connects voltage input end through a resistance R 2.
As stated, the described single-chip microcomputer of the utility model is used accurate mu balanced circuit, has following beneficial effect:
The described single-chip microcomputer of the utility model is low with the mu balanced circuit cost than existing single-chip microcomputer with accurate mu balanced circuit, and voltage regulation result is suitable with the LDO effect, and can satisfy the power demands of single-chip microcomputer.
Description of drawings
Fig. 1 is the circuit theory diagrams of the described single-chip microcomputer of the utility model with accurate mu balanced circuit.
Fig. 2 is the circuit theory diagrams of the described circuit that initially powers on of the utility model.
Fig. 3 is the circuit theory diagrams of the described main operating circuit of the utility model.
Fig. 4 is the circuit theory diagrams of the described overvoltage crowbar of the utility model.
Embodiment
Below through the embodiment of specific instantiation explanation the utility model, those skilled in the art can be understood other advantages and the effect of the utility model easily by the content that this instructions disclosed.The utility model can also be implemented or use through other different embodiment, and each item details in this instructions also can be carried out various modifications or change based on different viewpoints and application under the spirit that does not deviate from the utility model.
See also accompanying drawing.Need to prove; The diagram that is provided in the present embodiment is only explained the basic conception of the utility model in a schematic way; Satisfy only show in graphic with the utility model in relevant assembly but not component count, shape and plotted when implementing according to reality; Kenel, quantity and the ratio of each assembly can be a kind of random change during its actual enforcement, and its assembly layout kenel also maybe be more complicated.
The utility model provides a kind of single-chip microcomputer to use accurate mu balanced circuit, and this circuit comprises amplifier, single-chip microcomputer (MCU), triode, stabilivolt, resistance, electric capacity, power supply.The utility model is to utilize the reference voltage of the kernel reference power supply+2.5V of singlechip as integrated operational amplifier circuit, gives single-chip microcomputer (MCU) power supply again through amplifier control triode Q2 output acquisition+5V voltage, forms a closed loop circuit.Be characterized in obtaining the voltage of a precision through amplifier.
Below in conjunction with accompanying drawing the embodiment of the utility model is done further explain.
Embodiment
Present embodiment provides a kind of single-chip microcomputer to use accurate mu balanced circuit, and is as shown in Figure 1, and said single-chip microcomputer comprises the main operating circuit that links to each other with single-chip microcomputer and the circuit that initially powers on accurate mu balanced circuit, and the overvoltage crowbar that links to each other with main operating circuit.
As illustrated in fig. 1 and 2, the said circuit that initially powers on comprises resistance R 3, R5, stabilivolt Z2, capacitor C 3 and diode D1; One termination voltage input end (Vin) of said resistance R 3, the end of the other end connecting resistance R5 of resistance R 3, the other end ground connection of resistance R 5; Said stabilivolt Z2 and capacitor C 3 are all parallelly connected with resistance R 5; The other end of said resistance R 3 also connects the positive pole of diode D1; The negative pole of said diode D1 connects the power input of single-chip microcomputer.The said circuit that initially powers on provides the initial piezoelectric voltage that goes up to single-chip microcomputer.
When initially powering on, single-chip microcomputer (MCU) does not have the reference voltage of output+2.5V, so main operating circuit (discharge circuit) is not worked at the voltage input end (Vin) of the circuit that initially powers on.At this moment the circuit that initially powers on obtains one greater than the voltage of 2.5V less than 5.1V through R3 and R5 dividing potential drop, and this voltage is that single-chip microcomputer (MCU) provides initial power supply through diode D1, and this moment, the single-chip microcomputer kernel just can produce a stable+2.5V reference voltage.
As shown in figs. 1 and 3, said main operating circuit comprises amplifier U1 and triode Q2; The reference power supply output terminal of single-chip microcomputer connects the inverting input of amplifier U1 through a resistance R 7, and the in-phase input end of amplifier U1 is through a resistance R 8 ground connection, and the output terminal of amplifier U1 connects the base stage of triode Q2 through a resistance R 10; The emitter of triode Q2 connects the supply voltage of main operating circuit; The collector of triode Q2 connects the power input of single-chip microcomputer; The power input of single-chip microcomputer has the initial piezoelectric voltage that goes up.The collector of said triode Q2 is through a Voltage stabilizing module ground connection; Said Voltage stabilizing module is made up of the stabilivolt and the electric capacity of parallel connection.The base stage of said triode Q2 connects the emitter of triode Q2 through a resistance R 4; Said resistance R 4 is connected with capacitor C 6.Be connected a filter capacitor C1 between the output terminal of the inverting input of said amplifier U1 and amplifier U1; The in-phase input end of amplifier U1 links to each other with the collector of triode Q2 through a resistance R 9.
After the inverting input of amplifier U1 adds the reference voltage of one+2.5V, according to the amplifier principle of work, also can produce+voltage of 2.5V at the in-phase input end of amplifier U1, the voltage that can obtain the power input VDDP of single-chip microcomputer is:
VDDP＝2.5V/R8*(R8+R9)＝2.5V/10K*(10K+10K)＝5V
This 5V voltage produces the back and gives single-chip microcomputer (MCU) power supply, and this moment, diode D1 cut off the power supply of the circuit that initially powers on, and makes single-chip microcomputer (MCU) keep the less 5V power supply power supply of a steady ripple.
As shown in figs. 1 and 4; Said overvoltage crowbar comprises a triode Q1; The collector of triode Q1 connects voltage input end through a resistance R 1; The emitter of triode Q1 connects the emitter of said triode Q2, and the base stage of triode Q1 is through a voltage stabilizer Z1 ground connection, and the base stage of triode Q1 also connects voltage input end (Vin) through a resistance R 2.
For preventing that input voltage vin is too high triode Q2 in the main operating circuit is damaged, so add the overvoltage crowbar that a large power triode Q1 constitutes at triode Q2 front end.Utilize emitter follower circuit to produce the voltage about one+8.5V at the emitter of triode Q1, this voltage is whole main operating circuit power supply.
The described single-chip microcomputer of the utility model is low with the mu balanced circuit cost than existing single-chip microcomputer with accurate mu balanced circuit, and voltage regulation result is suitable with the LDO effect, and can satisfy the power demands of single-chip microcomputer.
So the utility model has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
The foregoing description is the principle and the effect thereof of illustrative the utility model only, but not is used to limit the utility model.Any be familiar with this technological personage all can be under the spirit and category of the utility model, the foregoing description is modified or is changed.Therefore, have common knowledge the knowledgeable under such as in the technical field, must contain by the claim of the utility model not breaking away from all equivalence modification or changes that spirit that the utility model discloses and technological thought are accomplished down.
Claims (6)
1. a single-chip microcomputer is used accurate mu balanced circuit, it is characterized in that: said single-chip microcomputer comprises the main operating circuit that links to each other with single-chip microcomputer with accurate mu balanced circuit; Said main operating circuit comprises amplifier U1 and triode Q2; The reference power supply output terminal of single-chip microcomputer connects the inverting input of amplifier U1 through a resistance R 7, and the in-phase input end of amplifier U1 is through a resistance R 8 ground connection, and the output terminal of amplifier U1 connects the base stage of triode Q2 through a resistance R 10; The emitter of triode Q2 connects the supply voltage of main operating circuit; The collector of triode Q2 connects the power input of single-chip microcomputer; The power input of single-chip microcomputer has the initial piezoelectric voltage that goes up.
2. single-chip microcomputer according to claim 1 is used accurate mu balanced circuit, it is characterized in that: the collector of said triode Q2 is through a Voltage stabilizing module ground connection; Said Voltage stabilizing module is made up of the stabilivolt and the electric capacity of parallel connection.
3. single-chip microcomputer according to claim 1 is used accurate mu balanced circuit, it is characterized in that: the base stage of said triode Q2 connects the emitter of triode Q2 through a resistance R 4.
4. single-chip microcomputer according to claim 1 is used accurate mu balanced circuit, it is characterized in that: be connected a filter capacitor C1 between the output terminal of the inverting input of said amplifier U1 and amplifier U1; The in-phase input end of amplifier U1 links to each other with the collector of triode Q2 through a resistance R 9.
5. single-chip microcomputer according to claim 1 is used accurate mu balanced circuit, it is characterized in that: the said initial piezoelectric voltage that goes up is provided by the circuit that initially powers on, and the said circuit that initially powers on comprises resistance R 3, R5, stabilivolt Z2, capacitor C 3 and diode D1; One termination voltage input end of said resistance R 3, the end of the other end connecting resistance R5 of resistance R 3, the other end ground connection of resistance R 5; Said stabilivolt Z2 and capacitor C 3 are all parallelly connected with resistance R 5; The other end of said resistance R 3 also connects the positive pole of diode D1; The negative pole of said diode D1 connects the power input of single-chip microcomputer.
6. single-chip microcomputer according to claim 1 is used accurate mu balanced circuit, it is characterized in that: said single-chip microcomputer also comprises the overvoltage crowbar that links to each other with the emitter of triode Q2 with accurate mu balanced circuit; Said overvoltage crowbar comprises a triode Q1; The collector of triode Q1 connects voltage input end through a resistance R 1; The emitter of triode Q1 connects the emitter of said triode Q2; The base stage of triode Q1 is through a voltage stabilizer Z1 ground connection, and the base stage of triode Q1 also connects voltage input end through a resistance R 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201162828U CN202512464U (en) | 2012-03-23 | 2012-03-23 | Precise voltage stabilizing circuit for singlechip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201162828U CN202512464U (en) | 2012-03-23 | 2012-03-23 | Precise voltage stabilizing circuit for singlechip |
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| Publication Number | Publication Date |
|---|---|
| CN202512464U true CN202512464U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201162828U Withdrawn - After Issue CN202512464U (en) | 2012-03-23 | 2012-03-23 | Precise voltage stabilizing circuit for singlechip |
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| CN (1) | CN202512464U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102662424A (en) * | 2012-03-23 | 2012-09-12 | 上海信耀电子有限公司 | Precise voltage stabilizing circuit for singlechip |
-
2012
- 2012-03-23 CN CN2012201162828U patent/CN202512464U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102662424A (en) * | 2012-03-23 | 2012-09-12 | 上海信耀电子有限公司 | Precise voltage stabilizing circuit for singlechip |
| CN102662424B (en) * | 2012-03-23 | 2014-12-03 | 上海信耀电子有限公司 | Precise voltage stabilizing circuit for singlechip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121031 Effective date of abandoning: 20141203 |
|
| RGAV | Abandon patent right to avoid regrant |