CN201830208U - Sampling circuit of relay tester amplifier - Google Patents
Sampling circuit of relay tester amplifier Download PDFInfo
- Publication number
- CN201830208U CN201830208U CN2010205698303U CN201020569830U CN201830208U CN 201830208 U CN201830208 U CN 201830208U CN 2010205698303 U CN2010205698303 U CN 2010205698303U CN 201020569830 U CN201020569830 U CN 201020569830U CN 201830208 U CN201830208 U CN 201830208U
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- resistance
- amplifier
- power amplifier
- circuit
- input
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- Expired - Fee Related
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Abstract
The utility model discloses a sampling circuit of a relay tester amplifier. The sampling circuit comprises a power amplifier, wherein the input end of the power amplifier is connected with input voltage, and a plurality of resistance voltage division circuits are connected in series between the positive output end and the negative output end of the power amplifier; and the output end of the resistance voltage division circuit is connected with the feedback input end of the power amplifier. In the amplifier circuit, the circuit with the amplifiers can be connected in series can be realized by a control power supply, with the complexity of circuit design is abated, cost is reduced and the working reliability of circuits is improved.
Description
Technical field
The utility model relates to a kind of sample circuit, is a kind of relay tester amplifier sample circuit specifically.
Background technology
In the Design of Amplifier process, when needs are connected use to a plurality of amplifiers, this just needs each amplifier all is to isolate mutually, comprise power power-supply and control power supply, could guarantee the operate as normal of series connection back amplifier like this, therefore need use a plurality of power supplys of independently controlling when amplifier is taken a sample, the use of independent current source has also increased cost when increasing complex circuit designs, reduced the reliability of circuit working.
Summary of the invention
Goal of the invention: the purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of relay tester amplifier sample circuit simple in structure is provided, and solving in the prior art needs to use a plurality of control power supplys, baroque problem.
In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:
A kind of relay tester amplifier sample circuit, it comprises power amplifier, the input termination input voltage of power amplifier is in series with the several resistor voltage divider circuit between the positive output end of power amplifier and the negative output terminal; The feedback input end of the output termination power amplifier of resistor voltage divider circuit.
In the utility model, described resistor voltage divider circuit comprises No. six resistance that link to each other with the positive output end of power amplifier, and No. seven resistance that link to each other with the negative output terminal of power amplifier, the other end of No. six resistance links to each other with No. five resistance, No. three resistance respectively, and the other end of No. seven resistance links to each other with No. five resistance, No. four resistance respectively; The other end of No. three resistance links to each other with the inverting input of an electric capacity, a resistance, an operational amplifier respectively; The other end of No. four resistance links to each other with the in-phase input end of No. two resistance, an operational amplifier respectively, the other end ground connection of No. two resistance; The output of electric capacity, resistance and operational amplifier links to each other with the feedback input end of power amplifier; The positive and negative power input of an operational amplifier connects corresponding positive and negative control power supply respectively.
Because the output voltage of power amplifier is higher, therefore just at power amplifier, suitable resistance pressure-dividing network of cathode output end series connection, thereby obtain a less dividing potential drop, by a see-saw circuit this voltage is carried out amplitude adjustment and phse conversion then, thereby obtain the feedback voltage that a multiplication factor with power amplifier is complementary, for realize all see-saw circuits all can be shared a control power supply, in the selection of resistance, the resistance that must satisfy the series connection divider resistance is much smaller than the input impedance of see-saw circuit, also can guarantee the linearity of feedback voltage and amplifier output voltage when could realize the series connection of amplifier like this.Owing to will realize the series connection of amplifier, therefore to consider the power of divider resistance, by calculating the power demand maximum in the series resistance at amplifier series connection two ends, the series resistance power demand minimum that mediates.
Beneficial effect: the utility model can realize having the circuit of the amplifier that can connect by a control power supply, has reduced the complexity of circuit design, reduces cost, has improved the reliability of circuit working.
Description of drawings
Be illustrated as circuit structure diagram of the present utility model.
Embodiment:
Below in conjunction with accompanying drawing the utility model is done further explanation.
As shown in the figure, the relay tester amplifier sample circuit that comprises that several are same of the present utility model.With one of them relay tester amplifier sample circuit is the circuit connection diagram that example illustrates it.It comprises power amplifier A1, and the input IN termination input voltage VI1 of power amplifier A1 is in series with the several resistor voltage divider circuit between the positive output end OUT+ of power amplifier A1 and the negative output terminal OUT-, thereby obtains a less dividing potential drop.By resistor voltage divider circuit this voltage is carried out amplitude adjustment and phse conversion, thereby obtain the feedback voltage that a multiplication factor with power amplifier A1 is complementary.The output VF1 of resistor voltage divider circuit meets the feedback input end FD of power amplifier A1.
Described resistor voltage divider circuit comprises No. six resistance R 6-1 that link to each other with the positive output end OUT1+ of power amplifier A1, and No. seven resistance R 7-1 that link to each other with the negative output terminal OUT1-of power amplifier A1, the other end of No. six resistance R 6-1 links to each other with No. five resistance R 5-1, No. three resistance R 3-1 respectively, and the other end of No. seven resistance R 7-1 links to each other with No. five resistance R 5-1, No. four resistance R 4-1 respectively; The other end of No. three resistance R 3-1 links to each other with the inverting input of a capacitor C 1-1, resistance R 1-1, an operational amplifier U1 respectively; The other end of No. four resistance R 4-1 links to each other with the in-phase input end of No. two resistance R 2-1, operational amplifier U1 respectively, the other end ground connection of No. two resistance R 2-1; The output VF1 of capacitor C 1-1, resistance R 1-1 and operational amplifier U1 links to each other with the feedback input end FD of power amplifier IC1; Positive and negative power input V+, the V-of an operational amplifier U1 connects corresponding positive and negative control power supply respectively.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (2)
1. a relay tester amplifier sample circuit is characterized in that it comprises power amplifier, and the input termination input voltage of power amplifier is in series with the several resistor voltage divider circuit between the positive output end of power amplifier and the negative output terminal; The feedback input end of the output termination power amplifier of resistor voltage divider circuit.
2. a kind of relay tester amplifier sample circuit according to claim 1, it is characterized in that, described resistor voltage divider circuit comprises No. six resistance that link to each other with the positive output end of power amplifier, and No. seven resistance that link to each other with the negative output terminal of power amplifier, the other end of No. six resistance links to each other with No. five resistance, No. three resistance respectively, and the other end of No. seven resistance links to each other with No. five resistance, No. four resistance respectively; The other end of No. three resistance links to each other with the inverting input of an electric capacity, a resistance, an operational amplifier respectively; The other end of No. four resistance links to each other with the in-phase input end of No. two resistance, an operational amplifier respectively, the other end ground connection of No. two resistance; The output of electric capacity, resistance and operational amplifier links to each other with the feedback input end of power amplifier; The positive and negative power input of an operational amplifier connects corresponding positive and negative control power supply respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205698303U CN201830208U (en) | 2010-10-21 | 2010-10-21 | Sampling circuit of relay tester amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205698303U CN201830208U (en) | 2010-10-21 | 2010-10-21 | Sampling circuit of relay tester amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201830208U true CN201830208U (en) | 2011-05-11 |
Family
ID=43968721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205698303U Expired - Fee Related CN201830208U (en) | 2010-10-21 | 2010-10-21 | Sampling circuit of relay tester amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201830208U (en) |
-
2010
- 2010-10-21 CN CN2010205698303U patent/CN201830208U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Corning road in Jiangning District of Nanjing City, Jiangsu Province, No. 789 211100 Patentee after: Suntech Power Technology (Nanjing) Limited by Share Ltd Address before: Corning road in Jiangning District of Nanjing City, Jiangsu Province, No. 789 211100 Patentee before: Suntech Power Technology (Nanjing) Co. Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20151021 |
|
| EXPY | Termination of patent right or utility model |