CN209911859U - Program-controlled voltage/current output switching circuit and system - Google Patents
Program-controlled voltage/current output switching circuit and system Download PDFInfo
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- CN209911859U CN209911859U CN201921086654.5U CN201921086654U CN209911859U CN 209911859 U CN209911859 U CN 209911859U CN 201921086654 U CN201921086654 U CN 201921086654U CN 209911859 U CN209911859 U CN 209911859U
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Abstract
The utility model discloses a programme-controlled voltage/current output switching circuit and system, programme-controlled voltage/current output switching circuit includes amplifier circuit module and relay module, and this relay module is connected with amplifier circuit module, and relay module receives voltage/current switching signal and gives amplifier circuit module with this signal transmission, and amplifier circuit module carries out the switching between homophase amplified voltage-stabilizing output circuit and the Howland constant current output circuit after receiving the voltage/current switching signal that analog signal and relay module transmitted. The utility model discloses use an amplifier and a plurality of resistance can realize the switching output of voltage and electric current, the device that uses still less, and the space that occupies is also littleer, can be used to EP-H8301.
Description
Technical Field
The utility model relates to a programme-controlled power, in particular to programme-controlled voltage/current output switching circuit and system.
Background
The program-controlled power supply is widely used in the field of test and measurement of various electronic products, is more expanded to other industries, adopts microcomputer control, has advanced technology, full program control and full key operation, has small volume, light weight and convenient carrying, and can be used in laboratories and on-site use.
However, the conventional programmable power supply cannot realize voltage and current switching output on one hand, and occupies a large space on the other hand.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a programme-controlled voltage/current output switching circuit, this programme-controlled voltage/current output switching circuit use an amplifier and a plurality of resistance can realize the switching output of voltage and electric current, and the device that uses still less, and the space that occupies is also littleer.
The technical scheme is as follows: a program control voltage/current output switching circuit comprises an amplifier module and a relay module, wherein the relay module is connected with the amplifier module, receives a voltage/current switching signal and transmits the voltage/current switching signal to the amplifier module, and the amplifier module receives an analog signal and the voltage/current switching signal transmitted by the relay module and then switches between an in-phase amplification voltage-stabilizing output circuit and a Howland constant current output circuit.
Preferably, the amplifier is provided with a first amplifier pin, a second amplifier pin, a third amplifier pin, a fourth amplifier pin, a fifth amplifier pin, a sixth amplifier pin, a seventh amplifier pin and an eighth amplifier pin.
Preferably, the relay is provided with a first relay connecting end, a second relay connecting end, a third relay connecting end, a fourth relay connecting end, a fifth relay connecting end, a sixth relay connecting end, a seventh relay connecting end and an eighth relay connecting end.
Preferably, the programmable voltage/current output switching circuit further comprises a resistor R1Resistance R2Resistance R3Resistance R4Resistance R5Resistance R6The first ground source, the second ground source and the first power supply; resistance R1One end of the resistor is connected with the first grounding source, the other end of the resistor is equal to the potential of the second pin of the amplifier, the other end of the resistor is equal to the potential of the third pin of the amplifier, and the resistor R2One terminal and resistor R5Connected with the other end of the resistor R at the same potential as the second pin of the amplifier5The other end of the resistor is equal to the potential of a sixth pin of the amplifier, a seventh pin of the amplifier is connected with the anode of the first power supply, a fourth pin of the amplifier is connected with the cathode of the first power supply, and a resistor R6One end of the resistor is equal to the potential of the sixth pin of the amplifier, the other end of the resistor is connected with the third connecting end of the relay, and the resistor R4One end of the relay is equipotential with the third pin of the amplifier, the other end of the relay is equipotential with the fourth connecting end of the relay, and the eighth connecting end of the relay receives the control signal.
Preferably, the amplifier module is an amplifier OPA 454.
Preferably, the relay module is a relay AGN 2004H.
The second objective of the present invention is to provide a program-controlled voltage/current output switching system.
The technical scheme is as follows: a program-controlled voltage/current output switching system comprises a controller module, a DAC module and a voltage/current switching circuit module, wherein the controller module is respectively connected with the DAC module and the voltage/current switching circuit module; the controller module respectively transmits parameters of output signals to the DAC module and transmits signals for controlling voltage/current switching to the voltage/current switching circuit module, the DAC module receives the parameters of the output signals and converts the parameters into analog signals to be input into the voltage/current switching circuit module, and the voltage/current switching circuit module receives the analog signals from the DAC module and the switching signals transmitted from the controller module and then performs switching between the in-phase amplification voltage-stabilizing output circuit and the Howland constant-current output circuit.
Preferably, the voltage/current switching circuit module is the voltage/current switching circuit described above.
Preferably, the controller module is an FPGA.
Preferably, the DAC module is a DAC 8831.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses an output the back level at DA and increase one-level amplifier circuit, change amplifier circuit's circuit structure through the relay, carry out the switching of voltage output circuit and constant current source circuit, realize voltage and current switching output.
The utility model discloses use an amplifier and a plurality of resistance can realize the switching output of voltage and electric current, the device of use still less, and the space that occupies is also littleer.
The utility model can be used for EP-H8301.
Description of the terms
DAC-DAC, i.e., Digital-to-Analog Converter, an exponential-Analog Converter.
Drawings
Fig. 1 is a schematic diagram of the program-controlled voltage/current output switching circuit of the present invention;
FIG. 2 is an equivalent schematic diagram of the voltage output of the present invention;
FIG. 3 is an equivalent schematic diagram of the current output of the present invention;
fig. 4 is a circuit diagram of the program-controlled voltage/current output switching circuit of the present invention;
fig. 5 is a schematic diagram of the system circuit of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless otherwise explicitly specified or limited, the terms "disposed," "opened," "mounted," "connected," and "connected" are to be construed broadly, e.g., as either a fixed connection, a detachable connection, or an integral connection; 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 in specific cases to those skilled in the art.
Example 1
Referring to fig. 1-5, a program-controlled voltage/current output switching circuit includes an amplifier module and a relay module, the relay module is connected with the amplifier module, the relay module receives a voltage/current switching signal and transmits the signal to the amplifier module, and the amplifier module receives an analog signal and the voltage/current switching signal transmitted by the relay module and then switches between an in-phase amplification voltage-stabilizing output circuit and a Howland constant-current output circuit.
It should be further noted that, in the present invention, the program-controlled voltage/current output switching circuit further includes a resistor R1Resistance R2Resistance R3Resistance R4Resistance R5Resistance R6The power supply comprises a first ground source, a second ground source and a first power supply.
The amplifier is provided with a first amplifier pin, a second amplifier pin, a third amplifier pin, a fourth amplifier pin, a fifth amplifier pin, a sixth amplifier pin, a seventh amplifier pin and an eighth amplifier pin.
The relay is provided with relay first link, relay second link, relay third link, relay fourth link, relay fifth link, relay sixth link, relay seventh link and relay eighth link.
Resistance R1One end of the resistor R is connected with the first grounding source, the other end of the resistor R is equal to the potential of the second pin of the amplifier3One end of the resistor R is connected with the output end of the DAC module, the other end of the resistor R is equal in potential with the third pin of the amplifier2One terminal and resistor R5Connected with the other end of the resistor R at the same potential as the second pin of the amplifier5The other end of the resistor is equal to the potential of a sixth pin of the amplifier, a seventh pin of the amplifier is connected with the anode of the first power supply, a fourth pin of the amplifier is connected with the cathode of the first power supply, and a resistor R6One end of the resistor is equal to the potential of the sixth pin of the amplifier, the other end of the resistor is connected with the third connecting end of the relay, and the resistor R4One end of the relay is equipotential with the third pin of the amplifier, the other end of the relay is equipotential with the fourth connecting end of the relay, and the relay is connected with the eighth connecting endThe terminal is connected with the controller module and receives the control signal from the controller module.
It should be further noted that, in the present invention, the amplifier module is an amplifier, and the amplifier is preferably an OPA 454.
It should be further noted that, in the present invention, the relay module relay and the relay are preferably AGN 2004H.
The utility model discloses in, through increase a switch in the R4 rear end, select whether positive end feedback circuit inserts the circuit, realize the switching to voltage/current output.
The utility model discloses in, voltage output circuit principle: when the voltage is output, the switch S is switched off, the circuit is equivalent to a same-phase amplifying circuit, and the gain is 1+ (R)2+R5)/R1Multiple, at this time R5The resistance is negligibly low, i.e. Vout is 2Vin, and the circuit is represented by a voltage-stabilized output.
The utility model discloses in, the current output circuit principle: when the current is output, the switch S is closed, and the circuit is equivalent to a HowLand constant current source output circuit. The amplifier is regarded as an ideal amplifier, and according to the theory of 'virtual short' and 'virtual break', the (R) is taken4+R6)/R3＝(R2+R5)/R1Then Iout is-Vin/R1. When the circuit works, the output voltage is fed back to the input end for comparison, the voltage change caused by the load impedance change is tracked in real time, the output current is kept constant, and the circuit is represented as constant-current output.
Example 2
As shown in fig. 5, a program-controlled voltage/current output switching system includes a controller module, a DAC module, and a voltage/current switching circuit module, where the controller module is connected to the DAC module and the voltage/current switching circuit module, the voltage/current switching circuit module is further connected to the DAC module, the voltage/current switching circuit module includes an amplifier module and a relay module, the controller module is connected to the relay module, and the DAC module is connected to the amplifier module.
The controller module transmits parameters of output signals to the DAC module and transmits signals for controlling voltage/current switching to the relay module respectively, the DAC module receives the parameters of the output signals and converts the parameters into analog signals to be input into the amplifier module, and the amplifier module receives the analog signals from the DAC module and the signals transmitted by the relay module and then realizes switching between the in-phase amplification voltage-stabilizing output circuit and the Howland constant-current output circuit.
It should be further noted that, in the present invention, the voltage/current switching circuit module is the voltage/current switching circuit module of embodiment 1.
It should be further noted that, in the present invention, the controller module is an FPGA.
It should be further noted that, in the present invention, the DAC module is DAC 8831.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A program-controlled voltage/current output switching circuit is characterized in that: the program-controlled voltage/current output switching circuit comprises an amplifier module and a relay module, wherein the relay module is connected with the amplifier module, the relay module receives a voltage/current switching signal and transmits the voltage/current switching signal to the amplifier module, and the amplifier module receives an analog signal and the voltage/current switching signal transmitted by the relay module and then switches between the in-phase amplification voltage-stabilizing output circuit and the Howland constant-current output circuit.
2. The programmable voltage/current output switching circuit of claim 1, wherein: the amplifier is provided with a first amplifier pin, a second amplifier pin, a third amplifier pin, a fourth amplifier pin, a fifth amplifier pin, a sixth amplifier pin, a seventh amplifier pin and an eighth amplifier pin.
3. The programmable voltage/current output switching circuit of claim 2, wherein: the relay is provided with a first relay connecting end, a second relay connecting end, a third relay connecting end, a fourth relay connecting end, a fifth relay connecting end, a sixth relay connecting end, a seventh relay connecting end and an eighth relay connecting end.
4. The programmable voltage/current output switching circuit of claim 3, wherein: the program-controlled voltage/current output switching circuit also comprises a resistor R1Resistance R2Resistance R3Resistance R4Resistance R5Resistance R6The first ground source, the second ground source and the first power supply; resistance R1One end of the resistor is connected with the first grounding source, the other end of the resistor is equal to the potential of the second pin of the amplifier, the other end of the resistor is equal to the potential of the third pin of the amplifier, and the resistor R2One terminal and resistor R5Connected with the other end of the resistor R at the same potential as the second pin of the amplifier5The other end of the resistor is equal to the potential of a sixth pin of the amplifier, a seventh pin of the amplifier is connected with the anode of the first power supply, a fourth pin of the amplifier is connected with the cathode of the first power supply, and a resistor R6One end of the resistor is equal to the potential of the sixth pin of the amplifier, the other end of the resistor is connected with the third connecting end of the relay, and the resistor R4One end of the relay is equipotential with the third pin of the amplifier, the other end of the relay is equipotential with the fourth connecting end of the relay, and the eighth connecting end of the relay receives the control signal.
5. The programmable voltage/current output switching circuit of claim 1, wherein: the amplifier module is an amplifier OPA 454.
6. The programmable voltage/current output switching circuit of claim 1, wherein: the relay module is a relay AGN 2004H.
7. A program-controlled voltage/current output switching system comprises a controller module, and is characterized in that: the program-controlled voltage/current output switching system also comprises a DAC module and a voltage/current switching circuit module, wherein the controller module is respectively connected with the DAC module and the voltage/current switching circuit module, and the voltage/current switching circuit module is also connected with the DAC module; the controller module respectively transmits parameters of output signals to the DAC module and transmits signals for controlling voltage/current switching to the voltage/current switching circuit module, the DAC module receives the parameters of the output signals and converts the parameters into analog signals to be input into the voltage/current switching circuit module, and the voltage/current switching circuit module receives the analog signals from the DAC module and the switching signals transmitted from the controller module and then performs switching between the in-phase amplification voltage-stabilizing output circuit and the Howland constant-current output circuit.
8. The programmable voltage/current output switching system of claim 7, wherein: the voltage/current switching circuit module is the voltage/current switching circuit as claimed in any one of claims 1 to 6.
9. The programmable voltage/current output switching system of claim 7, wherein: the controller module is an FPGA.
10. The programmable voltage/current output switching system of claim 7, wherein: the DAC module is DAC 8831.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921086654.5U CN209911859U (en) | 2019-07-12 | 2019-07-12 | Program-controlled voltage/current output switching circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921086654.5U CN209911859U (en) | 2019-07-12 | 2019-07-12 | Program-controlled voltage/current output switching circuit and system |
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| Publication Number | Publication Date |
|---|---|
| CN209911859U true CN209911859U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921086654.5U Active CN209911859U (en) | 2019-07-12 | 2019-07-12 | Program-controlled voltage/current output switching circuit and system |
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| Country | Link |
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| CN (1) | CN209911859U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388763A (en) * | 2023-04-10 | 2023-07-04 | 苏州领慧立芯科技有限公司 | DAC compatible with voltage/current output |
-
2019
- 2019-07-12 CN CN201921086654.5U patent/CN209911859U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388763A (en) * | 2023-04-10 | 2023-07-04 | 苏州领慧立芯科技有限公司 | DAC compatible with voltage/current output |
| CN116388763B (en) * | 2023-04-10 | 2023-12-22 | 苏州领慧立芯科技有限公司 | DAC compatible with voltage/current output |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Program controlled voltage/current output switching circuit and system Granted publication date: 20200107 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: Chengdu enfit Technology Co.,Ltd. Registration number: Y2024980017688 |