CN2278315Y - Constant current and voltage feeding device - Google Patents
Constant current and voltage feeding device Download PDFInfo
- Publication number
- CN2278315Y CN2278315Y CN 96244119 CN96244119U CN2278315Y CN 2278315 Y CN2278315 Y CN 2278315Y CN 96244119 CN96244119 CN 96244119 CN 96244119 U CN96244119 U CN 96244119U CN 2278315 Y CN2278315 Y CN 2278315Y
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistance
- constant
- transistor
- mentioned
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The purpose of the utility model is to provide a constant current and voltage feeding device which has improved voltage-stabilizing performance and can regulate voltage stabilized electric voltage. The device comprises an operational amplifier connected with a negative feedback loop and a positive feedback loop. AC signals can be received by the reverse phase terminal of the operational amplifier through a resistor. Moreover, two resistors are connected in series between the positive phase and the negative phase of the operational amplifier. Nodes between the two resistors are grounded. The positive feedback circuit is composed of resistors, a stabilized voltage unit for regulating voltage stabilized voltage and a filter circuit. The device can conveniently regulate voltage regulated electric voltage through changing the proportional relation of the two resistors in the stabilized voltage unit.
Description
The utility model relates to a kind of constant-current and constant-voltage feeder apparatus, in the pressure-stabilizing constant flow electric power system that the active subscriber line circuit of particularly a kind of stored-program control exchange is used, and the constant-current and constant-voltage feeder apparatus that voltage of voltage regulation is adjustable.
The electric power system of the active subscriber line circuit of stored-program control exchange needs constant current power supply when short-term, need the voltage stabilizing power supply again during long line, also requires to export certain power simultaneously.The subscriber line circuit design of satisfying above-mentioned requirements is complicated, the manufacturing cost height.In the inventor's CN95106914.4, a kind of amplifier with constant current and constant voltage feeding is disclosed, this device comprises that operational amplifier, feedback circuit, voltage stabilizing didoe and filter circuit constitute.Realized that circuit is simple, be easy to the integrated advantage of thick film.But the inventor finds that further because the restriction of voltage stabilizing diode manufacturing process level, the dispersion of its voltage of voltage regulation is bigger, and selecting the voltage-stabiliser tube with suitable voltage of voltage regulation value wastes time and energy, and can increase cost again.
The purpose of this utility model provides a kind of voltage regulation performance that improved, and makes the adjustable constant-current and constant-voltage feeder apparatus of voltage of voltage regulation, thereby easy to use, has also reduced manufacturing cost.
For realizing above-mentioned purpose of the present utility model, constant-current and constant-voltage feeder apparatus, this device comprises operational amplifier, be connected in the negative feedback loop and the positive feedback loop of operational amplifier, AC signal is received the operational amplifier end of oppisite phase by resistance, and positive and negative two resistance of serial connection between end mutually, two resistance intermediate node ground connection, it is characterized in that above-mentioned positive feedback circuit is by the adjustable voltage regulation unit of resistance, voltage of voltage regulation and the filter circuit of serial connection constitute successively.
And in device of the present utility model, the output of above-mentioned voltage regulation unit is connected with another transistorized base stage, working power voltage is added to above-mentioned transistorized collector electrode by resistance, and above-mentioned transistorized emitter is connected with filter circuit.In the voltage stabilizing process, reduced by transistorized electric current, thereby can reduce power consumption.
Device of the present utility model can be regulated voltage of voltage regulation easily by changing the ratio of two resistance in the voltage regulation unit.
Fig. 1 is the circuit diagram of the constant-current and constant-voltage feeder apparatus of the utility model first embodiment;
Fig. 2 is the circuit diagram of the constant-current and constant-voltage feeder apparatus of the utility model second embodiment;
Fig. 3 a, 3b and 3c are the voltage regulation unit circuit diagrams in the said apparatus of the present utility model.
Below, in conjunction with each accompanying drawing, describe embodiment of the present utility model in detail, make other purposes of the present utility model, feature and advantage become clearer by explanation.
The circuit diagram of the constant-current and constant-voltage feeder apparatus of the utility model first embodiment, as shown in Figure 1.In the figure, mark OPI is an operational amplifier, and AC signal Vi is via the inverting input (-) of resistance R 3 input operational amplifier OPI.Resistance R 2 is a negative feedback resistor.Connect between the inverting input (-) of operational amplifier OPI and the in-phase input end (+) R4 and R5, and the node ground connection of these two resistance.The regenerative circuit of operational amplifier OPI constitutes by connecting resistance R 1, voltage regulation unit and filter circuit resistance R 7, capacitor C 2 and R6 successively.Working power voltage VD is added to the node of voltage regulation unit and resistance R 7 by resistance R 8.Output VOUT is positioned at the node (being V2) of voltage regulation unit and R1 resistance.
Above-mentioned voltage regulation unit comprises: transistor Q1 and Q2, resistance R 9 and R10, and capacitor C 3, and shown in frame of broken lines among the figure.Transistor Q1 and transistor Q2 constitute Darlington.One end of the collector electrode of transistor Q1, Q2 and resistance R 9 is connected, and receives node V2.One end of the emitter-base bandgap grading of transistor Q1 and resistance R 10 is connected in the V1 node.The other end of the base stage of transistor Q2, resistance R 9, R10 and an end of capacitor C 3 are connected in node V3, and the other end ground connection of capacitor C 3.
The operation principle of above-mentioned voltage regulation unit is described now.When transistor Q1 and Q2 operate as normal, its base stage is about 0.7V to the voltage of emitter, does not change with electric current substantially, is equivalent to have the voltage-stabiliser tube diode characteristic.Make node V3 keep about 1.4V for node V1.When requiring to be higher than 1.4V voltage, can change the proportionate relationship of R9 and R10, for example use variable resistance R 9, make the electric current that flows through among R9, the R10 greater than or much larger than the base current of transistor Q3, Q1, therefore, can guarantee that the voltage between node V2 and the V1 is a stationary value.Just, the numerical value of adjusting R9, R10 can obtain different voltage stabilizing values (V1-V2).
In circuit,, should guarantee for keeping DC operation:
R2/ (R3 ∥ R4)=(R6+R7)/R5 exchanges multiplication factor.Stabling current is by V
z/ R1 decision, this V
zValue is the voltage stabilizing value of voltage regulation unit.The breakover point of constant current constant voltage is by the value decision of the voltage V1 of node V1.When transferring constant-voltage feeding to, the output V0=V1 of operational amplifier OPI, therefore, can be in predetermined dynamic range operate as normal.Less as Rx, when being operated in constant current state, the current potential of V1 is V1=V2-V
zSo, V0=V2-V
z, the electric current that flows through R1 is V
z/ R1.Just in time be by V
zThe constant current value of regulation.When RX is enough big, the current potential of V1 is not subjected to V2-V
zWhen influencing, V1 becomes a stable magnitude of voltage, and this moment, VD was also constant, and whole device becomes constant-voltage feeder apparatus.Transition between the two can be explained with the constant current principle.But this moment, voltage regulation unit presented one less than V because of operating current is very little
zVoltage status.
The circuit diagram of the constant-current and constant-voltage feeder apparatus of second embodiment of the present utility model, as shown in Figure 2.In the figure, mark OPI is an operational amplifier, and AC signal Vi is via R4 and the R5 of connecting between the inverting input (-) of resistance R 3 input operational amplifier OPI and the in-phase input end (+), and the node ground connection of these two resistance.The regenerative circuit of operational amplifier OPI constitutes by connecting resistance R 1, voltage regulation unit, transistor Q3 and filter circuit resistance R 7, capacitor C 2 and resistance R 6 successively.Working power voltage VD be added on the collector electrode of transistor Q3 by R8 resistance.The output of voltage regulation unit is connected with the base stage of transistor Q3.The emitter of transistor Q3 is connected with resistance R 7.Output V2 is positioned at the node of R1 resistance and voltage regulation unit.
Equally, above-mentioned voltage regulation unit shown in the frame of broken lines among Fig. 2, comprises transistor Q1 and Q2, resistance R 9 and R10, and capacitor C 3.Transistor Q1 and transistor Q2 constitute multiple tube.One end of the collector electrode of transistor Q1, Q2 and resistance R 9 is connected, and receives node V2.One end of the emitter-base bandgap grading of transistor Q1 and resistance R 10 is connected in the V1 node.The other end of the base stage of transistor Q2, resistance R 9, R10 and an end of electric capacity are connected in node V3, and the other end ground connection of electric capacity.
Voltage stabilizing operation principle and Fig. 1 circuit of circuit shown in Fig. 2 are basic identical, removing voltage of voltage regulation can be by changing the ratio of R9/R10, outside being adjusted easily, when RX is very little, go up consumed current from VD, more smaller than Fig. 1 circuit, promptly, V2 and V1 have reduced by the electric current of resistance R 8 by transistor Q3, thereby can reduce power consumption in the voltage stabilizing process.
In addition, transistor Q1, Q2 also can be single transistor, multiple tube, perhaps combining forms such as triode and voltage-stabiliser tube, triode and diode.Shown in Fig. 3 a, form voltage regulation unit with single transistor Q4, resistance R 9 and R10 and capacitor C 3.Shown in Fig. 3 b and Fig. 3 c, serial connection voltage-stabiliser tube D in the base loop of the transistor Q4 that resembles the voltage regulation unit shown in Fig. 3 a
wPerhaps be connected in series diode D, can obtain good effect equally.
Claims (5)
1, a kind of constant-current and constant-voltage feeder apparatus, this device comprises operational amplifier, is connected in the negative feedback loop and the positive feedback loop of operational amplifier, AC signal is received the operational amplifier end of oppisite phase by resistance, and positive and negative two resistance of serial connection between end mutually, two resistance intermediate node ground connection, it is characterized in that
Above-mentioned homophase feedback circuit is by resistance (R1), the adjustable voltage regulation unit of voltage of voltage regulation and the filter circuit of serial connection constitute successively.
2, according to the said constant-current and constant-voltage feeder apparatus of claim 1, it is characterized in that, the output of above-mentioned voltage regulation unit is connected with the base stage of transistor (Q3), working power voltage is added on the collector electrode of above-mentioned transistor (Q3) by resistance (R8), and the emitter of above-mentioned transistor (Q3) is connected with filter circuit.
3, according to claim 1 or 2 said constant-current and constant-voltage feeder apparatus, it is characterized in that, above-mentioned voltage regulation unit comprises transistor (Q4), resistance (R9) and resistance (R10) and electric capacity (C3), the emitter-base bandgap grading of above-mentioned transistor (Q4) is connected with the end of resistance (R9) with resistance (R10) respectively with collector electrode, the base stage of above-mentioned transistor (Q4) is connected with the other end of resistance (R9) and resistance (R10), and through electric capacity (C3) ground connection.
4, according to the said constant-current and constant-voltage feeder apparatus of claim 3, it is characterized in that, be connected in series voltage-stabiliser tube (D in the base loop of the above-mentioned transistor (Q4) of above-mentioned voltage regulation unit
w) and diode (D) in a kind of.
According to claim 3 or 4 said constant-current and constant-voltage feeder apparatus, it is characterized in that 5, the above-mentioned transistor (Q4) of above-mentioned voltage regulation unit is a kind of Darlington (Q1, Q2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96244119 CN2278315Y (en) | 1996-11-15 | 1996-11-15 | Constant current and voltage feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96244119 CN2278315Y (en) | 1996-11-15 | 1996-11-15 | Constant current and voltage feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2278315Y true CN2278315Y (en) | 1998-04-08 |
Family
ID=33917558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96244119 Expired - Fee Related CN2278315Y (en) | 1996-11-15 | 1996-11-15 | Constant current and voltage feeding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2278315Y (en) |
-
1996
- 1996-11-15 CN CN 96244119 patent/CN2278315Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1190474A (en) | Circuit arrangement for producing DC current | |
| KR100237904B1 (en) | Transducer circuit | |
| CN1026940C (en) | Method and apparatus for supplying direct current to telephone line | |
| CN110231846B (en) | Power module feedback control circuit with constant current and constant voltage dual functions | |
| CN2278315Y (en) | Constant current and voltage feeding device | |
| CN1058119C (en) | Constant-current and constant-voltage feeder apparatus | |
| CN209765366U (en) | Band gap reference circuit with adjusting circuit | |
| CN211509342U (en) | Trinity dimmer circuit based on MCU | |
| CN209730437U (en) | A kind of low-power laser and its driving circuit | |
| CN1076138C (en) | Oscillator voltage regulator | |
| CN2245833Y (en) | Constant-current constant-pressure feeding amplifying device | |
| CN208922090U (en) | Power circuit | |
| CN214506880U (en) | Output voltage adjustable current expansion circuit, control system and electric appliance | |
| CN219534038U (en) | Mini LED backlight driving circuit | |
| CN1049776C (en) | Amplifier with constant current and constant voltage feeding | |
| CN219068183U (en) | Novel intelligent interface module | |
| JPS58215815A (en) | Comparator circuit | |
| CN212588268U (en) | Constant voltage and constant current control circuit | |
| CN214205333U (en) | Automatic voltage regulating circuit | |
| CN217590583U (en) | Isolated power output sampling circuit | |
| CN219936680U (en) | Power supply unit and storage device driving system | |
| CN114423118B (en) | Three-in-one dimming circuit and LED (light emitting diode) lighting system | |
| CN207530707U (en) | A kind of electric power output voltage conditioned circuit | |
| CN2390228Y (en) | Two-way SCR controller | |
| CN109951075B (en) | Load regulation control circuit of switching power supply and implementation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Haixian Document name: Notice of conformity |
|
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: LIU HAIXIAN TO: BEIJING LEIHAI ELECTRONIC TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 100044, room 19, 820 West Road, Haidian District, Beijing Patentee after: Beijing Lei Hai Electronic Technology Co., Ltd. Address before: 100086 Beijing city Haidian District Zhichun Li Nan No. 15 building 4 layer Patentee before: Liu Haixian |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Lei Hai Electronic Technology Co., Ltd. Document name: Notice of conformity |
|
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: BEIJING LEIHAI ELECTRONIC TECHNOLOGY CO., LTD. TO: LIU HAIXIAN |
|
| CP03 | Change of name, title or address |
Address after: 100086 Beijing city Haidian District Zhichun Li Nan No. 15 building 4 layer Patentee after: Liu Haixian Address before: 100044, room 19, 820 West Road, Haidian District, Beijing Patentee before: Beijing Lei Hai Electronic Technology Co., Ltd. |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Haixian Document name: Notice of conformity |
|
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE ADDRESS; FROM: 4/F, BUILDING 15, HAIDIANZHICHUNLINAN, BEIJING CITY TO: LEIMING COMPANY, 5/F, NO. 11, SHANGDIXINXICHANYEKAITUO ROAD, HAIDIAN DISTRICT, BEIJING CITY, 100085 |
|
| CP03 | Change of name, title or address |
Address after: 100085, Beijing Haidian District information industry development road 11, 5 layer thunder company Patentee after: Liu Haixian Address before: Beijing Haidian Zhichun Li Nan No. 15 building 4 layer Patentee before: Liu Haixian |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Haisheng Document name: Notice of termination |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |