CN105990012B - The method for winding of transformer and transformer suitable for oscillator - Google Patents
The method for winding of transformer and transformer suitable for oscillator Download PDFInfo
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- CN105990012B CN105990012B CN201510100150.4A CN201510100150A CN105990012B CN 105990012 B CN105990012 B CN 105990012B CN 201510100150 A CN201510100150 A CN 201510100150A CN 105990012 B CN105990012 B CN 105990012B
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Abstract
The invention provides a kind of transformer suitable for oscillator and transformer coiling method.Transformer includes first and second coil.First coil is one first metal flat coil and presets solid region winding along one, default solid region includes first and second layer, first and second layer includes a left and right side region, after first end winding of the first coil along the left field of first layer is by one first center line, along the right side area winding of the second layer until the second end of the left field of the second layer.And the second coil is one second metal flat coil and along default solid region winding, after first end winding of second coil along second layer right side area is by one first center line, along the left field winding of the second layer until the second end of the right side area of first layer.First coil is provided with one first centre tap in one second position of center line of the right side area of the second layer, and the second coil is provided with one second centre tap in the second position of center line of the left field of the second layer.
Description
Technical field
The present invention relates to a kind of electronic installation；More particularly to a kind of transformer and method for winding suitable for oscillator.
Background technology
Fig. 1 shows the schematic diagram of existing transformer 100.Transformer is a kind of four end element, includes two inductance.And become
Depressor is not because main coil and secondary coil be directly intersecting, therefore and does not need direct current to obstruct (DC block).
And existing transformer is applied in differential circuit as shown in figure 1, the mode of its inductance winding, causes inductance asymmetric
On can have any problem.Furthermore if being applied to oscillating circuit, the configuration of electric capacity need to be set in addition, can increase many areas, make to be produced into
This raising.
Therefore a kind of transformer how is provided, makes main coil and secondary coil inductance symmetrical, and electric capacity setting can be saved
Area, actually one is badly in need of the problem of overcoming.
The content of the invention
It is an object of the present invention to provide a kind of transformer suitable for oscillator for having and saving space effect.
Have that improves inductance symmetry effect to be applied to oscillator it is another object of the present invention to provide a kind of
Transformer.
A further object of the present invention is that providing one kind uses transformer and section space-efficient oscillator.
According to one embodiment of the invention, there is provided a kind of transformer suitable for oscillator, include a first coil
With one second coil.First coil is one first metal flat coil and presets solid region winding along one, presets three-dimensional area
Domain includes a first layer and a second layer, and first layer and the second layer include a left field and a right side area, and first
It is straight along the right side area winding of the second layer after first end winding of the coil along the left field of first layer is by one first center line
To the second end of the left field of the second layer.And the second coil be one second metal flat coil and along default solid region around
If after first end winding of second coil along second layer right side area is by one first center line, along the left field of the second layer
Winding is until the second end of the right side area of first layer.Wherein, first coil is in one second center of the right side area of the second layer
Line position is provided with one first centre tap, and the second coil is provided with one second in the second position of center line of the left field of the second layer
Centre tap.
According to one embodiment of the invention, there is provided a kind of method for winding of transformer suitable for oscillator, include
The following steps：First, one first is included by a first coil and along a default solid region winding, the default solid region
Layer and a second layer, first layer and the second layer include a left field and a right side area, the first coil along this
After the first end winding of one layer of left field is by one first center line, along the second layer right side area winding until this
Second end of two layers of the left field.Then, by one second coil along default solid region winding, the second coil is along second
After the first end winding of layer right side area is by one first center line, along the left field winding of the second layer until being somebody's turn to do for first layer
Second end of right side area.After, one second position of center line of the first coil in the right side area of the second layer is set one the
One centre tap, and second position of center line of second coil in the left field of the second layer is set into one second centre tap.
To realize that oscillator or other functions can be by the first ends of the left field of first layer and second layer right side area
First end couples a power supply, a switching switch or an electric capacity；First centre tap and the second centre tap are coupled into a power supply, one
Switching switch or an electric capacity；Or the second end of the left field of the second layer and the second end of the right side area of first layer are coupled
One power supply, a switching switch or an electric capacity.
The first coil of transformer of the present invention and the second coil are achieved in first coil and the using the mode of interactive stacking
The inductance of two coil is symmetrical, and the mode of interactive stacking can increase space availability ratio, and separately vacating region in the centre of coiling is set
Centre tap, electric capacity or other elements can be set wherein to save space, be combined as shaking with what other elements or switching switched
The circuits such as device are swung, larger tuning range is can reach and increases the elasticity of circuit design.
Brief description of the drawings
Fig. 1 shows the schematic diagram of an existing transformer.
Fig. 2A shows the planar structure schematic diagram of the transformer of one embodiment of the invention.
Fig. 2 B show the dimensional structure diagram of the transformer of one embodiment of the invention.
Fig. 2 C show the schematic diagram of the embodiment of Fig. 2A first coils one.
Fig. 2 D show the schematic diagram of the embodiment of the second coils of Fig. 2A one.
Fig. 3 A show the LC oscillator schematic diagram of one embodiment of the invention.
Fig. 3 B are the equivalent circuit diagrams of transformer one LC oscillator of implementation shown in Fig. 3 A.
Fig. 4 shows the schematic diagram of the transformer application circuit of one embodiment of the invention.
Fig. 5 shows the schematic diagram of the transformer application circuit of another embodiment of the present invention.
Fig. 6 shows the schematic diagram of the transformer application circuit of another embodiment of the present invention.
Fig. 7 shows a kind of flow chart of the method for winding of transformer suitable for oscillator of one embodiment of the invention.
Wherein, description of reference numerals is as follows：
100th, 200 transformer
201st, 201 coil
E1, E2, P1, P2 end points
T1, T2 centre tap
S1, S2 metal level
L, R regions
A, B tie points
M1, M2 center line
C, C1, C2 electric capacity
SW is switched
VDD power supplys
Tr1, Tr2 transistor
Embodiment
Fig. 2A and Fig. 2 B show a kind of schematic diagram of transformer 200 suitable for oscillator of one embodiment of the invention.Figure
Fig. 2A is the plan of transformer 200, and Fig. 2 B are the stereogram of transformer 200.
Transformer 200 includes a first coil 201 and the second coil 202.
First coil 201 is one first metal flat coil and presets solid region winding along one, presets solid region
Include a first layer S1 and a second layer S2, first layer S1 and second layer S2 includes a left field L and a right side region
After domain R, left field L of the first metal flat coil along the first layer first end E1 windings are by one first center line M1,
Along second layer S2 right side area R windings until second layer S2 left field L the second end E2.
Second coil 202 is one second metal flat coil and along default solid region winding, the second metal flat line
Circle along the first end P1 windings of second layer S2 right side areas by one first center line M1 after, along second layer S2 left side area L domains
Winding is until first layer S1 right side area R the second end P2.
Wherein, first coil 201 is provided among one first in second layer S2 right side area R the second center line M2 positions
Tap T1, second coil 202 are provided with one second centre tap in second layer S2 left field L the second center line M2 positions
T2.In one embodiment, the first center line M1 is vertical with the second center line M2.
It may be noted that left field L of the first coil 201 along first layer first end E1 windings pass through one first center line
After M1, by right side area R windings of the tie point B along second layer S2 until second layer S2 left field L the second end E2；
And after first end P1 windings of second coil 202 along second layer S2 right side areas is by one first center line M1, pass through tie point A
Along second layer S2 left field L windings until first layer S1 right side area R the second end P2.
Fig. 2 C show the structure chart of first coil 201.Fig. 2 D show the structure chart of the second coil.First coil 201 is in
One layer of S1 left field L is after 0.5 circle, by tie point B connection second layers S2 right side area R, and in second layer S2
Right side area R and the second layer left field L around one circle.Therefore, first coil is altogether around 1.5 circles.
In Fig. 2 D, the second coil 202 in second layer S2 right side area R and left field L around one circle after, pass through connection
Point A connection first layers S1 right side area R, and enclosed in first layer S1 right side area R around 0.5.Therefore, the second coil is altogether
Around 1.5 circles.
In this way, the coil 202 of first coil 201 and second of transformer of the embodiment of the present invention utilizes the circle of 1.5 circle+1.5
The inductance that the mode of interactive stacking is achieved in the inductance and the second coil 202 of first coil 201 is symmetrical, and empty among coiling
Go out region and centre tap T1 and T2 are set, other application function can be increased, and save space and reduce cost.
The mode of the other application of transformer of the embodiment of the present invention is described as follows：
Fig. 3 A show the structural representation for implementing a LC oscillator using Fig. 2A transformer, and Fig. 3 B are Fig. 3 A institutes
The transformer shown implements the equivalent circuit diagram of a LC oscillator.In Fig. 3 A, the first layer S1 of transformer 200 left side area
Domain L first end E1 and the second layer S2 right side areas R first end P1 couple a power vd D.First centre tap T1 and second
Centre tap T2 coupling variable capacitances C both ends.Second layer S2 left field L the second end E2 and the first layer S1 right side
The region R switching switch SW of the second end P2 couplings one.
Switching switch bag SW contains a first transistor Tr1, a second transistor Tr2.The first transistor Tr1 first end
Second end E2 of 1 coupling second layer S2 left field, the first transistor Tr1 the second end 2 is grounded.Second transistor Tr2's
First end 1 couples first layer S1 right side area R the second end P2, and second transistor Tr2 the second end 2 is grounded, and second is brilliant
Body pipe Tr2 control terminal 3 couples the first transistor Tr1 first end 1, and the first transistor Tr1 control terminal 3 couples the second crystal
Pipe Tr2 first end 1.The equivalent circuit of LC oscillator is as shown in Figure 3 B.It may be noted that in other embodiment, it is above-mentioned to connect
Ground can be substituted with other current potentials.
In this way, variable capacitance C may be disposed at the center (center of inductance) of transformer, realize self-induction L1, L2, L3,
L4 and mutual inductance L13, L14, L23, L24 and electric capacity vibration, and may achieve the area for saving chip, it is not necessary to recycle other
Metal level realize centre tap (Center metal), and such a first coil and the mode of the second coil interactive stacking can
The utilization rate in space is improved, and saves the area of chip.
Furthermore transformer 200 can combine switching switch or other elements, reach other functions or reach bigger tuning
Scope (Tuning range).
One embodiment, as shown in figure 4, the first layer S1 of transformer 200 left field L first end E1 is right with the second layer
Side region R first end P1 couples a power vd D.The switching of first centre tap T1 and the second centre tap T2 couplings one switchs
SW.It should be noted that switching switchs a SW embodiment as shown in Figure 3A, but not limited to this.Also can be other existing or future hairs at present
The framework of exhibition.And second layer S2 left field L the second end E2 and first layer S1 right side area R the second end P2 couplings
One electric capacity C, in an embodiment, electric capacity C can be a variable capacitance.In this way, the oscillator electricity realized using transformer 200
Road, can be with larger tuning range (Tunning range) or with frequency of oscillation more than two.In the oscillator of high frequency
In design, because the only less variable capacitance of demand, but small variable capacitance is larger by effect of parasitic capacitance, therefore tuning range
It is not high, thus need to be designed to the technology for increasing tuning range, center now is placed as the present embodiment will switch switch SW, then
The area of the element for increasing tuning range can be saved.
One embodiment, as shown in figure 5, the first layer S1 of transformer 200 left field L first end E1 is right with the second layer
Side region R first end P1 couples one first electric capacity C1.First centre tap T1 and the second centre tap T2 couples a power supply
VDD.And second layer S2 left field L the second end E2 and first layer S1 right side area R the second end P2 couplings one second
Capacitance C2.In one embodiment, electric capacity C 1, C2 can be a variable capacitance.In this way, shaken using what transformer 200 was realized
Swinging device circuit has two symmetrical electric capacity, and two LC oscillators (LC tank oscillator), and may achieve section
The effect of saving area.
One embodiment, as shown in fig. 6, the first layer S1 of transformer 200 left field L first end E1 is right with the second layer
The side region R switching switch SW of first end P1 couplings one.It should be noted that switching switchs a SW embodiment as shown in Figure 3A, but it is unlimited
In this.Also can be other existing or future frameworks developed at present.First centre tap T1 and the second centre tap T2 is coupled
One power supply.And second layer S2 left field L the second end E2 and first layer S1 right side area R electricity of the second end P2 couplings one
Hold C, in an embodiment, electric capacity C can be a variable capacitance.In this way, the pierce circuit realized using transformer 200, can
Switch between two oscillator frequencies, and this framework is more symmetrical, may provide pin (PAD) by the position that Fig. 6 VDD are indicated,
Power vd D is connected, and the area of pin can be saved.
It may be noted that the winding turns 1.5 of above-mentioned first coil and the second coil are enclosed and can also set using other number of turns, example
Can be such as 2.5,3.5,4.5 circles, the invention is not restricted to this.
Fig. 7 shows a kind of flow chart of the method for winding of transformer suitable for oscillator of one embodiment of the invention.Should
Method includes the following steps：
Step S702：Start.
Step S704：One first coil is included one first along a default solid region winding, default solid region
Layer and a second layer, first layer and the second layer include a left field and a right side area, and first coil is along first layer
After the first end winding of left field is by one first center line, along the right side area winding of the second layer until the left side of the second layer
Second end in region.
Step S706：By one second coil along default solid region winding, the second coil is along second layer right side area
After first end winding is by one first center line, along the second layer left field winding until first layer right side area second
End.
Step S708：One second position of center line of the first coil in the right side area of the second layer is set among one first
Tap, and second position of center line of second coil in the left field of the second layer is set into one second centre tap.
Step S710：Terminate.
It may be noted that to realize that oscillator or other functions can be by the right side of the first ends of the left field of first layer and the second layer
The first end in region couples a power supply, a switching switch or an electric capacity；By the first centre tap and the second centre tap coupling one
Power supply, a switching switch or an electric capacity；Or by the right side area of the second end of the left field of the second layer and first layer
Second end couples a power supply, a switching switch or an electric capacity.
In summary, the first coil of transformer of the embodiment of the present invention is reached with the second coil using the mode of interactive stacking
It is symmetrical in first coil and the inductance of the second coil, and the mode of interactive stacking can increase space availability ratio, separately in coiling
Between vacate region centre tap be set, electric capacity or other elements can be set and wherein save space, it is not necessary to use other again
Metal level realizes centre tap.And and other elements or the combination design for switching switch, it can reach larger tuning range.
Though illustrating the present invention above with embodiment, the scope of the present invention is not therefore limited, without departing from the present invention
Main idea, the sector person carry out various modifications or change each fall within claims of the present invention scope.
Claims (19)
1. a kind of transformer suitable for oscillator, include：
One first coil, it is one first metal flat coil and presets solid region winding along one, the default solid region bag
Containing a first layer and a second layer, the first layer and the second layer include a left field and a right side area, and one the
The first layer and the second layer are divided into the left field and the right side area by one center line, and the first coil is along the first layer
After the first end winding of left field is by the first center line, along the right side area winding of the second layer until being somebody's turn to do for the second layer
Second end of left field；And
One second coil, one second metal flat coil and to preset solid region winding along this, second coil along this
After the first end winding of two layers of right side area is by one first center line, along the second layer left field winding until this first
Second end of the right side area of layer；
Wherein, the first coil is provided among one first in one second position of center line of the right side area of the second layer and taken out
Head, second center line and the first center line are generally aligned in the same plane and perpendicular to first center lines, second coil in this
Second position of center line of two layers of the left field is provided with one second centre tap.
2. the first end of the left field of transformer as claimed in claim 1, the wherein first layer and the second layer right side region
The first end in domain couples a power supply.
3. transformer as claimed in claim 2, also comprising a variable capacitance, the both ends of the variable capacitance be respectively coupled to this first
Centre tap and second centre tap.
4. the second end of the left field of transformer as claimed in claim 3, the wherein second layer should with the first layer
The switching switch of the second end coupling one of right side area.
5. transformer as claimed in claim 4, the wherein switching switch include：
One the first transistor, its first end couple the second end of the left field of the second layer, the second end ground connection；And
One second transistor, its first end couple the second end of the right side area of the first layer, the second end ground connection, and this second
The control terminal of transistor couples the first end of the first transistor, and the control terminal of the first transistor couples the second transistor
First end.
6. transformer as claimed in claim 3, first centre tap switchs with the switching of second centre tap coupling one.
7. transformer as claimed in claim 6, the wherein switching switch include：
One the first transistor, its first end couple second centre tap, the second end ground connection；And
One second transistor, its first end couple first centre tap, the second end ground connection, and the control terminal of the second transistor
The first end of the first transistor is coupled, the control terminal of the first transistor couples the first end of the second transistor.
8. the second end of the left field of transformer as claimed in claim 7, the wherein second layer should with the first layer
Second end of right side area couples an electric capacity.
9. the first end of the left field of transformer as claimed in claim 1, the wherein first layer and the second layer right side region
The first end in domain couples one first electric capacity.
10. transformer as claimed in claim 9, first centre tap couples a power supply with second centre tap.
11. the second end of the left field of transformer as claimed in claim 10, the wherein second layer and the first layer
Second end of the right side area couples one second electric capacity.
12. the first end of the left field of transformer as claimed in claim 1, the wherein first layer and the second layer right side region
The switching switch of first end coupling one in domain.
13. transformer as claimed in claim 12, the wherein switching switch include：
One the first transistor, its first end couple the first end of the left field of the first layer, the second end ground connection；And
One second transistor, its first end couple the first end along the second layer right side area, the second end ground connection, and second crystalline substance
The control terminal of body pipe couples the first end of the first transistor, and the control terminal of the first transistor couples the second transistor
First end.
14. transformer as claimed in claim 13, first centre tap couples a power supply with second centre tap.
15. the second end of the left field of transformer as claimed in claim 14, the wherein second layer and the first layer
Second end of the right side area couples a variable capacitance.
16. a kind of method for winding of transformer suitable for oscillator, includes following steps：
One first coil is included into a first layer and one second along a default solid region winding, the default solid region
Layer, the first layer and the second layer include a left field and a right side area, one first center line by the first layer with
The second layer is divided into the left field and the right side area, first end winding of the first coil along the left field of the first layer
After the first center line, along the right side area winding of the second layer until the second end of the left field of the second layer；
One second coil is preset into solid region winding along this, the first end of second coil along the second layer right side area around
If after one first center line, along the second layer left field winding until the first layer the right side area second
End；And
One second position of center line of the first coil in the right side area of the second layer is set into one first centre tap, should
Second center line and the first center line are generally aligned in the same plane and perpendicular to first center lines, and by second coil in this second
Second position of center line of the left field of layer sets one second centre tap.
17. method as claimed in claim 16, is also included：The first end of the left field of the first layer and the second layer is right
The first end of side region couples a power supply, a switching switch or an electric capacity.
18. method as claimed in claim 16, is also included：By first centre tap and the electricity of the second centre tap coupling one
Source, a switching switch or an electric capacity.
19. method as claimed in claim 16, is also included：By the second end of the left field of the second layer and the first layer
The right side area the second end couple a power supply, one switching switch or an electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510100150.4A CN105990012B (en) | 2015-03-06 | 2015-03-06 | The method for winding of transformer and transformer suitable for oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510100150.4A CN105990012B (en) | 2015-03-06 | 2015-03-06 | The method for winding of transformer and transformer suitable for oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105990012A CN105990012A (en) | 2016-10-05 |
| CN105990012B true CN105990012B (en) | 2018-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510100150.4A Active CN105990012B (en) | 2015-03-06 | 2015-03-06 | The method for winding of transformer and transformer suitable for oscillator |
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| Country | Link |
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| CN (1) | CN105990012B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10991503B2 (en) * | 2018-07-24 | 2021-04-27 | Realtek Semiconductor Corp. | Method of fabricating an inductor |
| EP4057504A4 (en) * | 2019-11-28 | 2022-11-23 | Huawei Technologies Co., Ltd. | Inductors, oscillators and terminal device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6707367B2 (en) * | 2002-07-23 | 2004-03-16 | Broadcom, Corp. | On-chip multiple tap transformer and inductor |
| CN1522450A (en) * | 2001-06-29 | 2004-08-18 | 皇家菲利浦电子有限公司 | Multiple-interleaved integrated circuit transformer |
| US6882263B2 (en) * | 2002-01-23 | 2005-04-19 | Broadcom, Corp. | On-chip transformer balun |
| CN101090032A (en) * | 2007-05-17 | 2007-12-19 | 威盛电子股份有限公司 | Inductance structure |
-
2015
- 2015-03-06 CN CN201510100150.4A patent/CN105990012B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1522450A (en) * | 2001-06-29 | 2004-08-18 | 皇家菲利浦电子有限公司 | Multiple-interleaved integrated circuit transformer |
| US6882263B2 (en) * | 2002-01-23 | 2005-04-19 | Broadcom, Corp. | On-chip transformer balun |
| US6707367B2 (en) * | 2002-07-23 | 2004-03-16 | Broadcom, Corp. | On-chip multiple tap transformer and inductor |
| CN101090032A (en) * | 2007-05-17 | 2007-12-19 | 威盛电子股份有限公司 | Inductance structure |
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