CN201167302Y - Circuit for amplifying differential signal - Google Patents
Circuit for amplifying differential signal Download PDFInfo
- Publication number
- CN201167302Y CN201167302Y CNU2007201965110U CN200720196511U CN201167302Y CN 201167302 Y CN201167302 Y CN 201167302Y CN U2007201965110 U CNU2007201965110 U CN U2007201965110U CN 200720196511 U CN200720196511 U CN 200720196511U CN 201167302 Y CN201167302 Y CN 201167302Y
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- Prior art keywords
- circuit
- differential signal
- signal
- power amplification
- amplifying
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Abstract
The utility model provides a differential signal amplifying circuit suitable for being used in the field of signal power amplification. The circuit comprises a differential signal decomposition circuit for decomposing a differential signal into two common-mode signal paths; a first power amplification circuit for amplifying the first common-mode signal path; and a second power amplification circuit for amplifying the second common-mode signal path. The differential signal power amplification circuit provided in the utility model decomposes the differential signal into two common-mode signal paths, and amplifies each common-mode signal path by one power amplification circuit, so that the amplifying circuit only needs one power supply, and has improved reliability and reduced cost.
Description
Technical field
The utility model belongs to signal power amplifier field, relates in particular to a kind of differential signal amplifying circuit.
Background technology
The differential signal amplifying circuit must adopt dual power supply, this uses the reliability of the equipment of differential signal power amplification circuit to cause influence to a certain degree to needs, for example electric vehicle motor is a differential signal with the excitation voltage signal of resolver, as shown in Figure 1, positive excited signal+and negative excited signal-process power amplification circuit effect after, export the rotating transformer exciting winding to, the dual power supply mode of this amplifying circuit makes the connecting line on the wiring board increase, so that reliability decrease and cost are higher.
The utility model content
The purpose of this utility model is to provide a kind of differential signal amplifying circuit, reliability decrease and cost problem of higher when being intended to solve present employing differential amplifier circuit.
The utility model is achieved in that a kind of differential signal amplifying circuit, and described circuit comprises:
Differential signal is decomposed into the differential signal decomposition circuit of two-way common-mode signal;
First via signal in the described two-way common-mode signal is carried out first power amplification circuit of processing and amplifying; And
The second road signal in the described two-way common-mode signal is carried out second power amplification circuit of processing and amplifying.
Another purpose of the present utility model is to provide a kind of equipment that adopts the differential signal amplifying circuit, and the differential signal amplifying circuit of described equipment is aforesaid differential signal amplifying circuit.
In the utility model, by differential signal being decomposed into the two-way common-mode signal, power amplification circuit by two amplifies this two-way common-mode signal respectively again, because each amplifying circuit only needs one road signal is carried out processing and amplifying, thereby realized that power amplification circuit only needs a power supply, the reliability of circuit strengthens, and cost descends.
Description of drawings
Fig. 1 is the block diagram of the excited signal treatment circuit of the dual power supply that provides of prior art;
Fig. 2 is the circuit block diagram of the differential signal amplifying circuit that provides of the utility model when excited signal is handled in to electric vehicle motor;
What Fig. 3 provided for the utility model is the detailed structure schematic diagram of the differential signal amplifying circuit of example with excited signal in the electric vehicle motor.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
In the utility model, differential signal is decomposed into the two-way common-mode signal, respectively this two-way common-mode signal is carried out power amplification, the synthetic output of the signal after will amplifying again at last.
The circuit block diagram of the differential signal amplifying circuit that Fig. 2 provides for the utility model when excited signal is handled in to electric vehicle motor, for convenience of description, only show the part relevant with the utility model, should be appreciated that differential signal amplifying circuit that the utility model provides go for any need be to the equipment of differential signal power amplification.
Differential signal decomposition circuit 21 is decomposed into common-mode signal 1 and common-mode signal 2 with positive excited signal and negative excited signal, common-mode signal 1 is identical to the polarity of zero potential signal with common-mode signal 2, common-mode signal 1 and common-mode signal 2 input to the first forward adder 221 and the second forward adder 222 respectively, two forward adders are nursed one's health input common-mode signal wherein respectively, with guarantee the minimum value of common-mode signal when changing greater than zero or maximum less than zero.First power amplification circuit 231 and second power amplification circuit 232 to amplifying through the common-mode signal after the first forward adder 221 and 222 conditionings of the second forward adder, export in the rotating transformer exciting winding 24 respectively at last.
First power amplification circuit 231 and second power amplification circuit 232 only need respectively one road signal is carried out power amplification, all adopt the single power supply mode, and two forward adders and two power amplification circuits can adopt same power supply, the reliability and stability of entire circuit are higher, and cost also decreases.
Fig. 3 is the detailed circuit structure that example shows the differential signal amplifying circuit that the utility model provides with excited signal in the electric vehicle motor.Resistance R 1 and R2 have formed the differential signal decomposition circuit, resistance R 1 is connected between excited signal VIN+ input and the zero potential, resistance R 2 is connected between excited signal VIN-input and the zero potential, the differential signal decomposition circuit is reference point with the zero potential, excited signal VIN+ and VIN-are decomposed into two common-mode signals identical to the zero potential signal polarity, and respectively by resistance R 3, R4 inputs to the in-phase input end of the first forward adder A1 and the in-phase input end of the second forward adder A2, power supply VCC is to be connected to the inverting input of the first forward adder A1 and the inverting input of the second forward adder A2 by resistance R 5 and R9 respectively, for two forward adders provide the inverting input signal, the inverting input of the inverting input of the first forward adder A1 and the second forward adder A2 is also by voltage stabilizing didoe ZD1 and voltage stabilizing didoe ZD2 connecting to neutral current potential, two voltage stabilizing didoes are used to make the voltage of inverting input more stable, output and the in-phase input end of the first forward adder A1 are connected with resistance R 6, and be connected with dummy load R7 between output and the zero potential, correspondingly, output and the in-phase input end of the second forward adder A2 are connected with resistance R 10, and are connected with dummy load R11 between output and the zero potential.The first forward adder A1 and the second forward adder A2 are respectively applied for input common-mode signal are wherein nursed one's health equally by power supply VCC power supply, with guarantee the minimum value of common-mode signal when changing greater than zero or maximum less than zero.
Common-mode signal after the first forward adder A1 and second forward adder A2 conditioning inputs to power amplification circuit OTL1, OTL2 by resistance R 8, R12 respectively and carries out power amplification, power amplification circuit in the utility model is typical output transformerless power amplification circuit (OutputTransformerless, OTL), two switching tubes in each OTL circuit are according to the situation of change alternation of input signal, input signal is amplified, and two OTL circuit are powered by power supply VCC.If the differential signal of circuit input is the motor excited signal, then latter two OTL circuit also will pass through amplifying signal and export on the rotating transformer exciting winding.
In the utility model, by differential signal being decomposed into the two-way common-mode signal, respectively this two-way common-mode signal is carried out power amplification by two simple OTL amplifying circuits again, thereby only needing in the entire circuit to have realized the circuit structure of a power supply, the reliability of circuit strengthens, and cost descends.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (7)
1, a kind of differential signal amplifying circuit is characterized in that, described circuit comprises:
Differential signal is decomposed into the differential signal decomposition circuit of two-way common-mode signal;
First via signal in the described two-way common-mode signal is carried out first power amplification circuit of processing and amplifying; And
The second road signal in the described two-way common-mode signal is carried out second power amplification circuit of processing and amplifying.
2, differential signal amplifying circuit as claimed in claim 1 is characterized in that, described circuit also comprises:
The first forward adder that first via signal in the described two-way common-mode signal is nursed one's health; The input of the described first forward adder is electrically connected with the first via signal output part of described differential signal decomposition circuit, and the output of the described first forward adder is electrically connected with the input of described first power amplification circuit; And
The second forward adder that the second road signal in the described two-way common-mode signal is nursed one's health; The input of the described second forward adder is electrically connected with the second road signal output part of described differential signal decomposition circuit, and the output of the described second forward adder is electrically connected with the input of described second power amplification circuit.
3, differential signal amplifying circuit as claimed in claim 2 is characterized in that, the in-phase input end of the described first forward adder is electrically connected with the first via signal output part of described differential signal decomposition circuit; The inverting input of the described first forward adder is connected with the power input that described differential signal amplifies by resistance, simultaneously by a voltage stabilizing didoe connecting to neutral current potential; Be connected with resistance between the in-phase input end of the described first forward adder and the output.
4, differential signal amplifying circuit as claimed in claim 2 is characterized in that, the in-phase input end of the described second forward adder is electrically connected with the second road signal output part of described differential signal decomposition circuit; The inverting input of the described second forward adder is connected with the power input that described differential signal amplifies by resistance, simultaneously by a voltage stabilizing didoe connecting to neutral current potential; Be connected with resistance between the in-phase input end of the described second forward adder and the output.
5, differential signal amplifying circuit as claimed in claim 1 is characterized in that, described differential signal decomposition circuit comprises first resistance and second resistance;
Described first resistance is connected between the first input end and zero potential of described differential signal amplifying circuit;
Described second resistance is connected between second input and zero potential of described differential signal amplifying circuit.
6, as claim 1,2 or 3 described differential signal amplifying circuits, it is characterized in that described first power amplification circuit and second power amplification circuit are the OTL power amplification circuit.
7, a kind of equipment that adopts the differential signal amplifying circuit is characterized in that, the differential signal amplifying circuit of described equipment is each described differential signal amplifying circuit of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201965110U CN201167302Y (en) | 2007-12-26 | 2007-12-26 | Circuit for amplifying differential signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201965110U CN201167302Y (en) | 2007-12-26 | 2007-12-26 | Circuit for amplifying differential signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201167302Y true CN201167302Y (en) | 2008-12-17 |
Family
ID=40192694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201965110U Expired - Lifetime CN201167302Y (en) | 2007-12-26 | 2007-12-26 | Circuit for amplifying differential signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201167302Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958894A (en) * | 2016-06-08 | 2016-09-21 | 北京新能源汽车股份有限公司 | Motor rotation transformer intelligent identification system and control method thereof |
| CN106208994A (en) * | 2016-08-30 | 2016-12-07 | 嘉善金亿精密铸件有限公司 | A kind of amplifying circuit in servomotor |
| CN107689780A (en) * | 2017-09-08 | 2018-02-13 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of pumping signal amplifying circuit |
-
2007
- 2007-12-26 CN CNU2007201965110U patent/CN201167302Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958894A (en) * | 2016-06-08 | 2016-09-21 | 北京新能源汽车股份有限公司 | Motor rotation transformer intelligent identification system and control method thereof |
| WO2017211038A1 (en) * | 2016-06-08 | 2017-12-14 | 北京新能源汽车股份有限公司 | Motor resolver intelligent identification system, and control method thereof |
| CN106208994A (en) * | 2016-08-30 | 2016-12-07 | 嘉善金亿精密铸件有限公司 | A kind of amplifying circuit in servomotor |
| CN106208994B (en) * | 2016-08-30 | 2018-11-30 | 嘉善金亿精密铸件有限公司 | A kind of amplifying circuit in servo motor |
| CN107689780A (en) * | 2017-09-08 | 2018-02-13 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of pumping signal amplifying circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081217 |