CN105990012A - Transformer applicable to oscillator and winding method of transformer - Google Patents
Transformer applicable to oscillator and winding method of transformer Download PDFInfo
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- CN105990012A CN105990012A CN201510100150.4A CN201510100150A CN105990012A CN 105990012 A CN105990012 A CN 105990012A CN 201510100150 A CN201510100150 A CN 201510100150A CN 105990012 A CN105990012 A CN 105990012A
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Abstract
The invention provides a transformer applicable to an oscillator and a winding method of the transformer. The transformer comprises a first coil and a second coil. The first coil is a first metal plane coil and is arranged in a winding mode along a preset three-dimensional area which comprises a first layer and a second layer, and the first layer and the second layer each comprises a left side area and a right side area; the first coil is arranged in a winding mode along the first end of the left side area of the first layer, passes through a first center line and then is arranged in a winding mode along the right side area of the second layer till reaching the second end of the left side area of the second layer. The second coil is a second metal plane coil and is arranged in a winding mode along the preset three-dimensional area, the second coil is arranged in a winding mode along the first end of the right side area of the second layer, passes through a first center line and is arranged in a winding mode along the left side area of the second layer till reaching the second end of the right area of the first layer. A first center tap is arranged on the position, on a second center line of the right side area of the second layer, of the first coil, and a second center tap is arranged on the portion, on a second center line of the left side area of the second layer, of the second coil.
Description
Technical field
The present invention relates to a kind of electronic installation；Particularly to a kind of transformer being applicable to oscillator and coiling
Method.
Background technology
Fig. 1 shows the schematic diagram of existing transformer 100.Transformer is a kind of four end element, includes two
Individual inductance.And transformer is not because main coil and secondary coil directly intersect, and is therefore not required to direct current
Intercept (DC block).
And existing transformer is as it is shown in figure 1, the mode of its inductance winding, cause inductance asymmetric, application
Differential circuit can be had any problem.Furthermore, if being applied to oscillating circuit, the configuration of electric capacity need to additionally be arranged,
Many areas can be increased, make production cost improve.
It how therefore a kind of transformer is provided, makes main coil symmetrical with secondary coil inductance, and can save
The area that electric capacity is arranged, actually a problem being badly in need of overcoming.
Content of the invention
It is an object of the present invention to provide a kind of change being applicable to oscillator having and saving space effect
Depressor.
Further object is that provide a kind of have improve inductance symmetry effect be applicable to shake
Swing the transformer of device.
A further object of the present invention is to provide a kind of use transformer and joint space-efficient oscillator.
According to one embodiment of the invention, provide a kind of transformer being applicable to oscillator, include one
First coil and one second coil.First coil is one first metal flat coil and presets solid along one
Region winding, default solid region includes a ground floor and a second layer, and ground floor all wraps with the second layer
Containing a left field and a right side area, first coil is along the first end winding of the left field of ground floor
After one first center line, along the second layer right side area winding until the second layer left field
Two ends.And the second coil is one second metal flat coil and along default solid region winding, the second line
Circle along the first end winding of second layer right side area by after one first center line, along the left side district of the second layer
Territory winding is until second end of right side area of ground floor.Wherein, first coil is in the right side region of the second layer
One second position of center line in territory is provided with one first centre tap, and the second coil is in the left field of the second layer
The second position of center line be provided with one second centre tap.
According to one embodiment of the invention, provide the method for winding of a kind of transformer being applicable to oscillator,
Including the following step: first, presetting solid region winding by a first coil and along one, this is preset
Solid region includes a ground floor and a second layer, and ground floor and this second layer all include district on the left of in the of
Territory and a right side area, this first coil along the first end winding of the left field of this ground floor by one the
After one center line, along this second layer right side area winding until this second layer this left field second
End.Then, by one second coil along default solid region winding, the second coil is along second layer right side region
The first end winding in territory is by after one first center line, along the left field winding of the second layer until ground floor
The second end of this right side area.After, by first coil in the one second of the right side area of the second layer
Heart line position arranges one first centre tap, and by the second coil in the second of the left field of the second layer
Heart line position arranges one second centre tap.
For realizing that oscillator or other functions can be by the right side of the first ends of the left field of ground floor and the second layer
First end in region couples a power supply, a switching switch or an electric capacity；By in the first centre tap and second
Between tap couple a power supply, one switching switch or an electric capacity；Or by the second end of the left field of the second layer
Couple a power supply, a switching switch or an electric capacity with the second end of this right side area of ground floor.
The first coil of transformer of the present invention and the second coil utilize the mode of interactive stacking to be achieved in First Line
Circle is symmetrical with the inductance of the second coil, and the mode of interactive stacking can increase space availability ratio, separately in coiling
Centre vacate region centre tap be set, electric capacity or other elements can be arranged wherein to save space,
With other elements or switching switch be combined as the circuit such as oscillator, can reach bigger tuning range and increasing
Add the elasticity of circuit design.
Brief description
Fig. 1 shows the schematic diagram of an existing transformer.
Fig. 2 A shows the planar structure schematic diagram of the transformer of one embodiment of the invention.
The perspective view of the transformer of Fig. 2 A ' display one embodiment of the invention.
Fig. 2 B shows the schematic diagram of Fig. 2 A first coil one embodiment.
Fig. 2 C shows the schematic diagram of Fig. 2 A the second coil one embodiment.
Fig. 3 A shows the LC oscillator schematic diagram of one embodiment of the invention.
Fig. 3 B is the equivalent circuit diagram that a LC oscillator implemented by the transformer 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 the stream of the method for winding of a kind of transformer being applicable to oscillator of one embodiment of the invention
Cheng Tu.
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 region
A, B tie point
M1, M2 center line
C, C1, C2 electric capacity
SW switchs
VDD power supply
Tr1, Tr2 transistor
Detailed description of the invention
A kind of transformer 200 being applicable to oscillator of Fig. 2 A and Fig. 2 A ' display one embodiment of the invention
Schematic diagram.Figure Fig. 2 A is the plane of transformer 200, and Fig. 2 A ' is 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 includes an a ground floor S1 and second layer S2, and ground floor S1 all comprises with second layer S2
Having left field L and right side area R, the first metal flat coil is along the left field of this ground floor
The first end E1 winding of L by after one first center line M1, along second layer S2 right side area R around
If until the second end E2 of this left field L of second layer S2.
Second coil 202 is one second metal flat coil and along default solid region winding, the second gold medal
The the first end P1 winding belonging to planar coil along second layer S2 right side area by after one first center line M1,
Along the left side district L territory winding of second layer S2 until the second end P2 of right side area R of ground floor S1.
Wherein, the second center line M2 position of right side area R in second layer S2 for the first coil 201
Be provided with one first centre tap T1, this second coil 202 in second layer S2 left field L second
Center line M2 position is provided with one second centre tap T2.In one embodiment, the first center line M1 and
Two center line M2 are vertical.
It may be noted that first coil 201 is passed through along the first end E1 winding of left field L of this ground floor
After one first center line M1, by tie point B along the right side area R winding of second layer S2 until
Second end E2 of this left field L of two layers of S2；And the second coil 202 is along second layer S2 right side region
The first end P1 winding in territory is by after one first center line M1, by tie point A along second layer S2's
The winding of left field L is until the second end P2 of right side area R of ground floor S1.
The structure chart of Fig. 2 B display first coil 201.Fig. 2 C shows the structure chart of the second coil.First
Coil 201 in ground floor S1 left field L around 0.5 circle after, by tie point B connect second
Right side area R of layer S2, and in right side area R of second layer S2 and left field L of the second layer around
One circle.Therefore, first coil is altogether around 1.5 circles.
In Fig. 2 C, the second coil 202 in right side area R of second layer S2 and left field L around one
After circle, connected right side area R of ground floor S1 by tie point A, and in the right side region of ground floor S1
Territory R is around 0.5 circle.Therefore, the second coil is altogether around 1.5 circles.
Mode according to this, the first coil 201 of embodiment of the present invention transformer and the second coil 202 utilize 1.5
The mode of circle+1.5 circle interactive stacking is achieved in the inductance of first coil 201 and the inductance of the second coil 202
Symmetry, and vacate region in the centre of coiling centre tap T1 and T2 is set, can increase other should be diligent
Can, and save space minimizing cost.
The mode of other application of embodiment of the present invention transformer is described as follows:
Fig. 3 A shows the structural representation utilizing the transformer of Fig. 2 A to implement a LC oscillator, figure
3B is the equivalent circuit diagram that a LC oscillator implemented by the transformer shown in Fig. 3 A.In Fig. 3 A,
First end E1 of left field L of transformer 200 ground floor S1 and second layer S2 right side area R
First end P1 couples a power vd D.First centre tap T1 and the second centre tap T2 couples variable
The two ends of electric capacity C.The right side of the second end E2 and this ground floor S1 of left field L of second layer S2
The second end P2 of region R couples a switching switch SW.
Switching switch bag SW contains a first transistor Tr1, a transistor seconds Tr2.The first transistor
First end 1 of Tr1 couples the second end E2 of the left field of second layer S2, the first transistor Tr1's
Second end 2 is grounded.First end 1 of transistor seconds Tr2 couples right side area R of ground floor S1
Second end 2 of the second end P2, transistor seconds Tr2 is grounded, and the control end 3 of transistor seconds Tr2
Coupling first end 1 of the first transistor Tr1, the control end 3 of the first transistor Tr1 couples the second crystal
First end 1 of pipe Tr2.The equivalent circuit of LC oscillator is as shown in Figure 3 B.It may be noted that other
In embodiment, above-mentioned ground connection can use other current potentials to replace.
Mode according to this, variable capacitance C may be disposed at the center (center of inductance) of transformer, it is achieved self-induction
L1, L2, L3, L4 and the vibration of mutual inductance L13, L14, L23, L24 and electric capacity, and can reach
Save the area of chip, it is not necessary to recycle other metal level to realize centre tap (Center metal),
And the mode of this kind of first coil and the second coil interactive stacking can improve the utilization rate in space, and save core
The area of piece.
Furthermore, transformer 200 can be reached other functions in conjunction with switching switch or other elements or reach
Bigger tuning range (Tuning range).
One embodiment, as shown in Figure 4, the first of left field L of the ground floor S1 of transformer 200
End E1 couples a power vd D with the first end P1 of second layer right side area R.First centre tap T1
Couple a switching switch SW with the second centre tap T2.Should be noted an enforcement of switching switch SW for example
It shown in Fig. 3 A, but is not limited to this.Also can be other existing or future at present frameworks developing.And the
Second end P2 of right side area R of the second end E2 and ground floor S1 of left field L of two layers of S2
Coupling an electric capacity C, in an embodiment, electric capacity C can be a variable capacitance.Mode according to this, utilizes transformation
The pierce circuit that device 200 realizes, can have bigger tuning range (Tunning range) or have two groups
Above frequency of oscillation.In the oscillator design of high frequency, because the only less variable capacitance of demand, so
And little variable capacitance is relatively big by effect of parasitic capacitance, therefore tuning range is not high, so that be designed to
Increase the technology of tuning range, now as switching switch SW is placed central authorities by the present embodiment, then can save
For increasing the area of the element of tuning range.
One embodiment, as it is shown in figure 5, the first of left field L of the ground floor S1 of transformer 200
End E1 couples one first electric capacity C1 with the first end P1 of second layer right side area R.First centre tap
T1 and the second centre tap T2 couples a power vd D.And the second of left field L of second layer S2
Second end P2 of right side area R of end E2 and ground floor S1 couples one second capacitance C2.One is real
Executing in example, electric capacity C the 1st, C2 can be a variable capacitance.Mode according to this, utilizes transformer 200 to realize
Pierce circuit has the electric capacity of two symmetries, and two LC oscillators (LC tank oscillator),
And the effect saving area can be reached.
One embodiment, as shown in Figure 6, the first of left field L of the ground floor S1 of transformer 200
End E1 couples a switching switch SW with the first end P1 of second layer right side area R.Should be noted that switching is opened
Close an embodiment of SW as shown in Figure 3A, but be not limited to this.Also can be existing or future at present for other
The framework developing.First centre tap T1 and the second centre tap T2 couples a power supply.And the second layer
Second end P2 of right side area R of the second end E2 and ground floor S1 of left field L of S2 couples one
Electric capacity C, in an embodiment, electric capacity C can be a variable capacitance.Mode according to this, utilizes transformer 200
The pierce circuit realizing, can switch between two oscillator frequencies, and this framework is more symmetrical, may
The position being indicated by Fig. 6 VDD provides pin (PAD), connects power vd D, and can save pin
Area.
It may be noted that the winding turns 1.5 of above-mentioned first coil and the second coil encloses and also can use other number of turns
Set, for example, can be the 2.5th, the 3.5th, 4.5 circles etc., the invention is not restricted to this.
Fig. 7 shows the stream of the method for winding of a kind of transformer being applicable to oscillator of one embodiment of the invention
Cheng Tu.The method includes the following step:
Step S702: start.
Step S704: along one, a first coil is preset solid region winding, default solid region comprises
Having a ground floor and a second layer, ground floor and the second layer all include a left field and a right side area,
First coil along the first end winding of the left field of ground floor by after one first center line, along the second layer
Right side area winding until second end of left field of the second layer.
Step S706: by one second coil along default solid region winding, the second coil is right along the second layer
First end winding of side region is by after one first center line, along the left field winding of the second layer until the
Second end of the right side area of a layer.
Step S708: one second position of center line of the right side area in the second layer for the first coil is arranged one
First centre tap, and the second position of center line by the left field in the second layer for second coil arranges one
Second centre tap.
Step S710: terminate.
It may be noted that for realizing that oscillator or other functions can be by the first ends of the left field of ground floor and the
First end of two layers of right side area couples a power supply, a switching switch or an electric capacity；By the first centre tap
Couple a power supply, a switching switch or an electric capacity with the second centre tap；Or by the second layer this on the left of district
Second end in territory couples a power supply, a switching switch or an electricity with the second end of this right side area of ground floor
Hold.
In sum, the first coil of embodiment of the present invention transformer and the second coil utilize interactive stacking
It is symmetrical with the inductance of the second coil that mode is achieved in first coil, and the mode of interactive stacking can increase space
Utilization rate, separately the centre in coiling is vacated region and is arranged centre tap, can arrange electric capacity or other elements
Wherein to save space, it is not necessary to use other metal levels again and realize centre tap.And with other elements or
The combination design of switching switch, can reach bigger tuning range.
Though the present invention being described with embodiment above, but therefore do not limit the scope of the present invention, as long as not taking off
From idea of the invention, various deformation or change that the sector person is carried out each fall within the claim of the present invention
Book scope.
Claims (20)
1. it is applicable to a transformer for oscillator, include:
One first coil is one first metal flat coil and presets solid region winding along one, and this is pre-
Setting up body region to include a ground floor and a second layer, it is left that this ground floor and this second layer all include one
Side region and a right side area, this first coil is passed through along the first end winding of the left field of this ground floor
After one first center line, along the right side area winding of this second layer until this left field of this second layer
Second end；And
One second coil, is one second metal flat coil and along this default solid region winding, and this is years old
Two coil along the first end winding of this second layer right side area by after one first center line, along this second layer
Left field winding until second end of this right side area of this ground floor；
Wherein, one second position of center line of this right side area in this second layer for this first coil is provided with one
First centre tap, this second position of center line of this left field in this second layer for this second coil sets
There is one second centre tap.
2. transformer as claimed in claim 1, wherein the first end of the left field of this ground floor with should
First end of second layer right side area couples a power supply.
3. transformer as claimed in claim 2, also comprises a variable capacitance, the two ends of this variable capacitance
It is respectively coupled to this first centre tap and this second centre tap.
4. transformer as claimed in claim 3, wherein the second end of this left field of this second layer with
Second end of this right side area of this ground floor couples a switching switch.
5. the transformer as described in claim 3, wherein this switching switch includes:
One the first transistor, its first end couples the second end of this left field of this second layer, the second end
Ground connection；And
One transistor seconds, its first end couples the second end of this right side area of this ground floor, the second end
It is grounded, and the control end of this transistor seconds couples this first end of this first transistor, this first crystal
The control end of pipe couples the first end of this transistor seconds.
6. transformer as claimed in claim 1, wherein the first end of the left field of this ground floor with should
First end of second layer right side area couples a power supply.
7. transformer as claimed in claim 6, this first centre tap couples with this second centre tap
One switching switch.
8. transformer as claimed in claim 7, wherein this switching switch includes:
One the first transistor, its first end couples this second centre tap, the second end ground connection；And
One transistor seconds, its first end couples this first centre tap, the second end ground connection, and this second
The control end of transistor couples this first end of this first transistor, and the control end of this first transistor couples
First end of this transistor seconds.
9. transformer as claimed in claim 8, wherein the second end of this left field of this second layer with
Second end of this right side area of this ground floor couples an electric capacity.
10. transformer as claimed in claim 1, wherein the first end of the left field of this ground floor with should
First end of second layer right side area couples one first electric capacity.
11. transformers as claimed in claim 10, this first centre tap and this second centre tap coupling
Connect a power supply.
12. transformer as claimed in claim 11, wherein the second ends of this left field of this second layer
Couple one second electric capacity with the second end of this right side area of this ground floor.
13. transformers as claimed in claim 1, wherein the first end of the left field of this ground floor with should
First end of second layer right side area couples a switching switch.
14. transformers as claimed in claim 13, wherein this switching switch includes:
One the first transistor, its first end couples the first end of the left field of this ground floor, the second termination
Ground；And
One transistor seconds, its first end couples the first end along this second layer right side area, the second termination
Ground, and the control end of this transistor seconds couples this first end of this first transistor, this first transistor
Control end couple the first end of this transistor seconds.
15. transformers as claimed in claim 14, this first centre tap and this second centre tap coupling
Connect a power supply.
16. transformer as claimed in claim 15, wherein the second ends of this left field of this second layer
Couple a variable capacitance with the second end of this right side area of this ground floor.
The method for winding of 17. 1 kinds of transformers being applicable to oscillator, includes following steps:
Along one, a first coil is preset solid region winding, and this default solid region includes one first
Layer and a second layer, this ground floor and this second layer all include a left field and a right side area, are somebody's turn to do
First coil along the first end winding of the left field of this ground floor by after one first center line, along this
The right side area winding of two layers is until second end of this left field of this second layer；
By one second coil along this default solid region winding, this second coil is along this second layer right side region
The first end winding in territory by after one first center line, along this second layer left field winding until this
Second end of this right side area of a layer；And
One second position of center line of this right side area in this second layer for this first coil is arranged one first
Centre tap, and this second position of center line by this left field in this second layer for this second coil sets
Put one second centre tap.
18. methods as claimed in claim 17, also comprise: by the first of the left field of this ground floor
End couples a power supply, a switching switch or an electric capacity with the first end of this second layer right side area.
19. methods as claimed in claim 17, also comprise: in the middle of this first centre tap and second
Tap couples a power supply, a switching switch or an electric capacity.
20. methods as claimed in claim 17, also comprise: by the of this left field of this second layer
Two ends couple a power supply, a switching switch or an electric capacity with the second end of this right side area of this this ground floor.
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 true CN105990012A (en) | 2016-10-05 |
| CN105990012B CN105990012B (en) | 2018-02-09 |
Family
ID=57039825
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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752085A (en) * | 2018-07-24 | 2020-02-04 | 瑞昱半导体股份有限公司 | Multi-turn inductor with balanced response and method of making same |
| WO2021102812A1 (en) * | 2019-11-28 | 2021-06-03 | 华为技术有限公司 | Inductors, oscillators and terminal device |
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| 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 |
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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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752085A (en) * | 2018-07-24 | 2020-02-04 | 瑞昱半导体股份有限公司 | Multi-turn inductor with balanced response and method of making same |
| CN110752085B (en) * | 2018-07-24 | 2021-03-19 | 瑞昱半导体股份有限公司 | Multi-turn inductor with balanced response and method of making same |
| WO2021102812A1 (en) * | 2019-11-28 | 2021-06-03 | 华为技术有限公司 | Inductors, oscillators and terminal device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105990012B (en) | 2018-02-09 |
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