CN208284311U - A kind of integrated variable turning ratio transformer of on piece - Google Patents
A kind of integrated variable turning ratio transformer of on piece Download PDFInfo
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- CN208284311U CN208284311U CN201820888191.3U CN201820888191U CN208284311U CN 208284311 U CN208284311 U CN 208284311U CN 201820888191 U CN201820888191 U CN 201820888191U CN 208284311 U CN208284311 U CN 208284311U
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Abstract
The utility model relates to a kind of integrated variable turning ratio transformers of on piece, including two primary coil units, two switch units and primary coil unit, wherein A primary coil unit connection rf inputs mouth anode and A switch unit input port, the output port connection B switch unit and B primary coil unit anode of A switch unit, B primary coil unit cathode connects B switch unit, B switch unit input port connects rf inputs mouth cathode, secondary coil anode and cathode are separately connected radio frequency output port anode and cathode, secondary coil unit exports radio-frequency input signals by electromagnetic coupling；Transformer turn ratio is controlled by A switch unit and B switch unit.Advantage: 1) transformer turn ratio can provide a variety of impedance variations, voltage transformation and current transformation as needed and save device cost.2) secondary design can be used for a variety of applications, save time cost.3) at low cost, it has broad application prospects and is worth.
Description
Technical field
The utility model is a kind of integrated variable turning ratio transformer of on piece, belongs to technical field of integrated circuits.
Background technique
In radio circuit, impedance matching is may be implemented in transformer, and the multiple functions such as power combing are the RF devices most wanted
One of part.
Traditional transformer device structure is as shown in Figure 1, its structure is made of primary coil series unit and secondary coil unit.
By the coupling between two coil units, output port output is couple by radio-frequency input signals.
Traditional transformer has the disadvantages that in present mobile communication that operating mode is more and more, and traditional transformer
Turn ratio is fixed, and single situation is only applicable to, and different applicable cases are needed to redesign, or needs multiple transformers
To meet application, increase cost.
Utility model content
The utility model proposes a kind of integrated variable turning ratio transformer of on piece, its object is in order to overcome tradition
The deficiency that transformer turn cannot be changed provides a kind of integrated variable turning ratio transformer of on piece, so that the turn ratio of transformer
It can be changed as needed, using flexible reduces cost.
The technical solution of the utility model: a kind of integrated variable turning ratio transformer of on piece, including A primary coil list
Member, A switch unit, B primary coil unit, B switch unit and secondary coil unit, wherein the anode of A primary coil unit connects
The cathode for being connected to rf inputs mouth anode in+, A primary coil unit is connected to the i input port of A switch unit, and A switch is single
The o1 output port of member is connected to the o1 output port of B switch unit, and the o2 output port of A switch unit is connected to B primary line
The anode of coil unit, the cathode of B primary coil unit are connected to the o2 output port of B switch unit, the i input of B switch unit
Port is connected to rf inputs mouth cathode in-, and secondary coil anode is connected to radio frequency output port anode out+, secondary coil
Cathode is connected to radio frequency output port cathode out-, between secondary coil unit and A primary coil unit and B primary coil unit
There are electromagnetic couplings, and radio-frequency input signals is coupled and is exported；Transformer turn ratio is controlled by A switch unit and B switch unit,
A primary coil unit circle number be M1, B primary coil unit circle number be M2, secondary coil unit circle number is N1, it can be achieved that M1:N1
Two kinds of turning ratio transformers of or (M1+M2): N1.
The utility model has the beneficial effects that
(1) transformer turn ratio can according to need variation, provide a variety of impedance variations, voltage transformation and current transformation,
A variety of use environments can be coped with, device cost is saved.
(2) traditional transformer is a variety of in application, need accordingly to design multiple transformers, and the utility model can be used
It is only primary with design in a variety of applications, save time cost.
(3) the utility model can be used the kinds of processes such as RF CMOS, GaAs, BiCMOS, SOI and carry out single-chip integration realization,
It is at low cost, it has broad application prospects and is worth.
Detailed description of the invention
Attached drawing 1 is traditional transformer circuit schematic diagram.
Attached drawing 2 is the integrated variable turning ratio transformer block diagram of on piece.
Attached drawing 3 is the integrated variable turning ratio transformer schematic diagram of on piece.
Attached drawing 4 is the equivalent schematic diagram under two kinds of operating modes of the integrated variable turning ratio transformer of on piece.
Attached drawing 5 is that traditional structure and the integrated variable turning ratio transformer structure of the utility model on piece are asynchronous in impedance
Match condition compares (a) traditional structure (b) the utility model structure.
Attached drawing 6 is a variety of turning ratio transformer schematic diagrams that multiple primary coils are realized.
Attached drawing 7 is a variety of turning ratio transformer physical circuit figures that multiple primary coils are realized.
Li1, Li2, Lo1 are inductance in figure, and M1, M2, M3, M4 are transistors, and R1, R2, R3, R4 are resistance, and o1, o2 are defeated
Exit port, i are input ports, and in+ is rf inputs mouth anode, and in- is rf inputs mouth cathode, and VC, VCF are control letters
Number.
Specific embodiment
A kind of integrated variable turning ratio transformer of on piece, including A primary coil unit, A switch unit, B primary coil list
Member, B switch unit and secondary coil unit, wherein the anode of A primary coil unit is connected to rf inputs mouth anode in+, A
The cathode of primary coil unit is connected to the i input port of A switch unit, and the o1 output port of A switch unit is connected to B switch
The o1 output port of unit, the o2 output port of A switch unit are connected to the anode of B primary coil unit, B primary coil unit
Cathode be connected to the o2 output port of B switch unit, the i input port of B switch unit is connected to rf inputs mouth cathode
In-, secondary coil anode are connected to radio frequency output port anode out+, and secondary coil cathode is connected to radio frequency output port cathode
Out-, there are electromagnetic couplings between secondary coil unit and A primary coil unit and B primary coil unit, and radio frequency is inputted and is believed
Number coupling output；Transformer turn ratio is controlled by A switch unit and B switch unit, at the beginning of A primary coil unit circle number is M1, B
Grade coil unit circle number is M2, secondary coil unit circle number is N1, it can be achieved that two kinds of turn ratio transformations of M1:N1 or (M1+M2): N1
Device.
It include being more than or equal to a primary coil unit number in the integrated variable turning ratio transformer of the on piece, to realize more
A variety of turning ratio transformers.
The A primary coil unit includes Li1 inductance；The anode of Li1 inductance is connected to rf inputs mouth anode,
The cathode of Li1 inductance is connected to the i input port of A switch unit.
The A switch unit includes M1 transistor, M2 transistor, R1 resistance and R2 resistance；The drain electrode of M1 transistor connects
It is connected to the drain electrode of M2 transistor, while being connected to the i input port of A switch unit, it is single that the source electrode of M1 transistor is connected to A switch
The o1 output port of member, while it being connected to the o1 output port of B switch unit, the grid of M1 transistor is connected to the A of R1 resistance
End；The end B of R1 resistance is connected to VC control voltage；The source electrode of M2 transistor is connected to the anode of B primary coil unit, connects simultaneously
It is connected to the o2 output port of A switch unit, the grid of M2 transistor is connected to the end A of R2 resistance；The end B of R2 resistance is connected to
VCF controls voltage.
The B primary coil unit includes Li2 inductance；The anode of Li2 inductance is connected to the o2 output end of A switch unit
Mouthful, the cathode of Li2 inductance is connected to the o2 output port of B switch unit.
The B switch unit includes M3 transistor and M4 transistor, R3 resistance and R4 resistance；The drain electrode of M3 transistor
It is connected to the o1 output port of A switch unit, while being connected to the o1 output port of B switch unit, the source electrode of M3 transistor connects
It is connected to the source electrode of M4 transistor, while the grid for being connected to rf inputs mouth cathode in-, M3 transistor is connected to R3 resistance
The end A；The end B of R3 resistance is connected to VC control signal end mouth；The drain electrode of M4 transistor is connected to the negative pole end of B primary coil unit
Mouthful, while it being connected to the o2 output port of B switch unit, the grid of M4 transistor is connected to the end A of R4 resistance, the B of R4 resistance
End is connected to VCF control signal end mouth.
The secondary coil unit includes Lo1 inductance；The anode of Lo1 inductance is connected to the output mouth anode out+, Lo1
The cathode of inductance is connected to the output a mouthful cathode out-；Lo1 inductance forward direction coupled end is coupled to the inductance in A primary coil unit
The positive coupled end of Li2 in Li1, B primary coil unit.
The VC and VCF is a pair of of inverted control signal；When VC control signal is height, and VCF control signal is low, M1 is brilliant
Body pipe and M3 transistor turns, M2 transistor and M4 transistor cutoff, transformer turn ratio are equal to Li1 number of inductor and Lo1 electricity
The ratio between sense circle number；When VC control signal be it is low, VCF controls signal when being high, M1 transistor and M3 transistor cutoff, M2 transistor
With M4 transistor turns, transformer turn ratio is equal to Li1 inductance plus the ratio between the number of total coils of Li2 inductance and Lo1 number of inductor；It is logical
It crosses control VC and VCF and realizes that voltage turn ratio is adjustable；The unit number of primary coil is more than or equal to 1, to realize a variety of circles
Number is than variation.
Technical solutions of the utility model are further illustrated with reference to the accompanying drawing
As shown in Fig. 2, the integrated variable turning ratio transformer of a kind of on piece, structure includes A primary coil unit, and A is opened
Unit, B primary coil unit, B switch unit and secondary coil unit are closed, wherein the anode of A primary coil unit, which is connected to, penetrates
The cathode of frequency input terminal mouth anode in+, A primary coil unit is connected to the defeated of input port i, the A switch unit of A switch unit
The output port o2 that exit port o1 is connected to output port o1, the A switch unit of B switch unit is connected to B primary coil unit
Anode, the cathode of B primary coil unit be connected to output port o2, the B switch unit of B switch unit input port i connect
It is connected to rf inputs mouth cathode in-, secondary coil anode is connected to radio frequency output port anode out+, and secondary coil cathode connects
It is connected to radio frequency output port cathode out-, there is electricity between secondary coil unit and A primary coil unit, B primary coil unit
Radio-frequency input signals is coupled and is exported by magnetic coupling.A switch unit and B switch unit control transformer turn ratio, it is assumed that A is primary
Coil unit circle number be M1, B primary coil unit circle number be M2, secondary coil unit circle number is N1, then can be achieved M1:N1 and
(M1+M2): two kinds of turning ratio transformers of N1, primary coil unit number also can be multiple, to realize more kinds of turning ratio transformers.
As shown in Fig. 3, the integrated variable turning ratio transformer of a kind of on piece, it is characterized in that the A primary line
Coil unit includes inductance Li1；The anode of Li1 is connected to rf inputs mouth anode, and the cathode of Li1 is connected to A switch unit
Port i.
The A switch unit includes transistor M1, transistor M2, resistance R1 and resistance R2；The drain electrode of transistor M1 connects
It is connected to the drain electrode of transistor M2, while being connected to the port i of A switch unit, the source electrode of transistor M1 is connected to A switch unit
Port o1, while it being connected to the port o1 of B switch unit, the grid of transistor M1 is connected to resistance R1；The other end of resistance R1
It is connected to control voltage VC；The source electrode of transistor M2 is connected to the anode of B primary coil unit, while being connected to A switch unit
Port o2, the grid of transistor M2 is connected to one end of resistance R2；The other end of resistance R2 is connected to control voltage VCF.
The B primary coil unit includes inductance Li2；The anode of inductance Li2 is connected to the port o2 of A switch unit,
The cathode of inductance Li2 is connected to the port o2 of B switch unit.
The B switch unit includes transistor M3 and transistor M4, resistance R3 and resistance R4；The drain electrode of transistor M3 connects
It is connected to the port o1 of A switch unit, while being connected to the port o1 of B switch unit, the source electrode of transistor M3 is connected to transistor
The source electrode of M4, while it being connected to rf inputs mouth cathode in-, the grid of transistor M3 is connected to one end of resistance R3；Resistance
The other end of R3 is connected to control signal end mouth VC；The drain electrode of transistor M4 is connected to the cathode port of B primary coil unit, together
When be connected to the port o2 of B switch unit, the grid of transistor M4 is connected to one end of resistance R4, the other end connection of resistance R4
To control signal end mouth VCF.
The secondary coil unit includes inductance Lo1；The anode of inductance Lo1 is connected to the output mouth anode out+, electricity
The cathode of sense Lo2 is connected to the output a mouthful cathode out-；Inductance Lo2 forward direction coupled end is coupled to the positive coupling of inductance Li1, Li2
Close end.
As shown in Fig. 4, VC and VCF is a pair of of inverted control signal；Assuming that the circle number of Li1 is in A primary coil unit
The circle number of Li2 is M2 in M1, B primary coil unit, and the circle number of secondary coil unit is N1；It is brilliant when VC is height, and VCF is low
Body pipe M1 and transistor M3 conducting, transistor M2 and transistor M4 cut-off, the equivalent schematic diagram of transformer is as shown in Figure 4 (a), becomes
The turn ratio of depressor is M1:N1, at this point,
Zin=(M1/N1)2×R
v out=(N/M1) ×v in
i out=(M1/N1) ×i in；
When VC be it is low, VCF be it is high when, transistor M1 and transistor M3 cut-off, transistor M2 and transistor M4 conducting, transformation
The equivalent schematic diagram of device is as shown in Figure 4 (b), and transformer turn ratio is (M1+M2): N1, at this point,
Zin=[(M1+M2)/N1]2×R
v out=[N/(M1+M2)] ×v in
i out=[(M1+M2)/N1] ×i in；
Realize that voltage turn ratio is adjustable by control VC and VCF；The unit number of primary coil can be it is multiple, with realize more
A variety of turn ratio variations.
As shown in Fig. 5, traditional structure and the utility model structure are in the asynchronous match condition comparison (source impedance of impedance
For 50 Ω, load impedance is respectively 25 Ω and 75 Ω), in traditional architectures, when load impedance is 25 Ω, matching is good, when negative
When load impedance switches to 75 Ω, impedance matching is deteriorated, and S11 is only -8, is unsatisfactory for -10 standards below；Use the utility model
When, two states can be matched respectively, pass through switching working condition according to different loads, matched in the case of two kinds
Below -15dB.
As shown in attached drawing 6-7, a variety of turning ratio transformer schematic diagrams and practical circuit diagram realized for multiple primary coils.
Claims (7)
1. the integrated variable turning ratio transformer of a kind of on piece, it is characterized in that including A primary coil unit, A switch unit, B primary
Coil unit, B switch unit and secondary coil unit, wherein the anode of A primary coil unit is being connected to rf inputs mouth just
Pole (in+), the cathode of A primary coil unit are connected to the i input port of A switch unit, and the o1 output port of A switch unit connects
It is connected to the o1 output port of B switch unit, the o2 output port of A switch unit is connected to the anode of B primary coil unit, at the beginning of B
The cathode of grade coil unit is connected to the o2 output port of B switch unit, and it is defeated that the i input port of B switch unit is connected to radio frequency
Inbound port cathode (in-), secondary coil anode are connected to radio frequency output port anode (out+), and secondary coil cathode, which is connected to, to be penetrated
Frequency output port cathode (out-), there are electromagnetism couplings between secondary coil unit and A primary coil unit and B primary coil unit
It closes, radio-frequency input signals is coupled and is exported；Transformer turn ratio, A primary coil are controlled by A switch unit and B switch unit
Unit circle number be M1, B primary coil unit circle number be M2, secondary coil unit circle number is N1, it can be achieved that M1:N1 or (M1+M2):
Two kinds of turning ratio transformers of N1.
2. a kind of integrated variable turning ratio transformer of on piece according to claim 1, can it is characterized in that the on piece is integrated
Becoming includes being more than or equal to a primary coil unit number in turning ratio transformer, to realize more kinds of turning ratio transformers.
3. the integrated variable turning ratio transformer of a kind of on piece according to claim 1, it is characterized in that the A primary coil
Unit includes Li1 inductance；The anode of Li1 inductance is connected to rf inputs mouth anode, and the cathode of Li1 inductance is connected to A switch
The i input port of unit.
4. the integrated variable turning ratio transformer of a kind of on piece according to claim 1, it is characterized in that the A switch unit
Including M1 transistor, M2 transistor, R1 resistance and R2 resistance；The drain electrode of M1 transistor is connected to the drain electrode of M2 transistor, simultaneously
It is connected to the i input port of A switch unit, the source electrode of M1 transistor is connected to the o1 output port of A switch unit, connects simultaneously
To the o1 output port of B switch unit, the grid of M1 transistor is connected to the end A of R1 resistance；The end B of R1 resistance is connected to VC control
Voltage processed；The source electrode of M2 transistor is connected to the anode of B primary coil unit, while being connected to the o2 output end of A switch unit
Mouthful, the grid of M2 transistor is connected to the end A of R2 resistance；The end B of R2 resistance is connected to VCF control voltage.
5. the integrated variable turning ratio transformer of a kind of on piece according to claim 1, it is characterized in that the B primary coil
Unit includes Li2 inductance；The anode of Li2 inductance is connected to the o2 output port of A switch unit, and the cathode of Li2 inductance is connected to B
The o2 output port of switch unit.
6. the integrated variable turning ratio transformer of a kind of on piece according to claim 1, it is characterized in that the B switch unit
Including M3 transistor and M4 transistor, R3 resistance and R4 resistance；The drain electrode of M3 transistor is connected to the o1 output end of A switch unit
Mouthful, while it being connected to the o1 output port of B switch unit, the source electrode of M3 transistor is connected to the source electrode of M4 transistor, connects simultaneously
It is connected to rf inputs mouth cathode (in-), the grid of M3 transistor is connected to the end A of R3 resistance；The end B of R3 resistance is connected to VC
Control signal end mouth；The drain electrode of M4 transistor is connected to the cathode port of B primary coil unit, while being connected to B switch unit
O2 output port, the grid of M4 transistor is connected to the end A of R4 resistance, and the end B of R4 resistance is connected to VCF control signal end
Mouthful.
7. the integrated variable turning ratio transformer of a kind of on piece according to claim 1, it is characterized in that the secondary coil
Unit includes Lo1 inductance；The anode of Lo1 inductance is connected to the output mouth anode (out+), and the cathode of Lo1 inductance is connected to defeated
Exit port cathode (out-)；Lo1 inductance forward direction coupled end is coupled to Li1 inductance, B primary coil list in A primary coil unit
The positive coupled end of Li2 inductance in member.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820888191.3U CN208284311U (en) | 2018-06-08 | 2018-06-08 | A kind of integrated variable turning ratio transformer of on piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820888191.3U CN208284311U (en) | 2018-06-08 | 2018-06-08 | A kind of integrated variable turning ratio transformer of on piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109754989A (en) * | 2019-01-30 | 2019-05-14 | 熊猫电子集团有限公司 | A kind of line transformer and radio-frequency power amplifier |
| CN113839693A (en) * | 2020-06-08 | 2021-12-24 | Oppo广东移动通信有限公司 | NFC device, electronic equipment and signal processing method |
-
2018
- 2018-06-08 CN CN201820888191.3U patent/CN208284311U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109754989A (en) * | 2019-01-30 | 2019-05-14 | 熊猫电子集团有限公司 | A kind of line transformer and radio-frequency power amplifier |
| CN113839693A (en) * | 2020-06-08 | 2021-12-24 | Oppo广东移动通信有限公司 | NFC device, electronic equipment and signal processing method |
| CN113839693B (en) * | 2020-06-08 | 2024-02-27 | Oppo广东移动通信有限公司 | NFC device, electronic equipment and signal processing method |
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Address after: 210016 No.166, zhengfangzhong Road, moling street, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing Guobo Electronics Co.,Ltd. Address before: 210016 No.166, zhengfangzhong Road, moling street, Jiangning District, Nanjing City, Jiangsu Province Patentee before: NANJING GUOBO ELECTRONICS Co.,Ltd. |