CN103427767B - Layout design method for double-balance passive frequency mixer - Google Patents
Layout design method for double-balance passive frequency mixer Download PDFInfo
- Publication number
- CN103427767B CN103427767B CN201210161216.7A CN201210161216A CN103427767B CN 103427767 B CN103427767 B CN 103427767B CN 201210161216 A CN201210161216 A CN 201210161216A CN 103427767 B CN103427767 B CN 103427767B
- Authority
- CN
- China
- Prior art keywords
- double
- signal
- frequency mixer
- design method
- layout design
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Superheterodyne Receivers (AREA)
- Transceivers (AREA)
Abstract
The present invention relates to the communications field, disclose a kind of layout design method for double-balance passive frequency mixer.In the present invention, by laying out pattern, active pipe being placed on the domain centre position generating this tributary signal, it is achieved active circuit technological angle mates, electric capacity uses finger-cross structure to be placed on both sides, it is achieved capacitance process mates.Further, when RF holding wire intersects with LO holding wire, perpendicular crossing, reduce parasitic capacitance, reduce local oscillator leakage, that can weaken direct current mismatch further produces the impact on receiver sensitivity performance.On the premise of not increasing chip area, power consumption and cost, improve the performance of double balanced passive mixers, improve the sensitivity of communication system.Preferably, keep IQ two-way close, cause the mismatch of orthogonal I/Q signal reducing process deviation.
Description
Technical field
The present invention relates to the communications field, particularly to the double balanced passive mixers in reception system.
Background technology
China Mobile multimedia broadcasting (China Mobile Multimedia Broadcasting is called for short " CMMB ") is
The first set of domestic independent research, towards the system of the multiple mobile terminal such as mobile phone, notebook computer, utilizes S-band signal to realize
" world " one covers, whole nation roaming, supports 25 set TVs and 30 set broadcast programs.On October 24th, 2006, country's broadcasting and TV are total
Office formally promulgates China Mobile multimedia broadcasting (being commonly called as mobile TV) industry standard, determines the movement using China's independent research
Multimedia broadcasting industry standard.China Mobile multimedia broadcasting defines in broadcasting service frequency range, and mobile multimedia is wide
The frame structure of broadcast system broadcast channel transmission signal, Channel Coding and Modulation, standard is applicable to 30MHz to 3000MHz frequency model
Enclose interior broadcasting service frequency, launch the multi-media signals such as TV, broadcast, data message by satellite and/or terrestrial wireless
Broadcast system, can realize whole nation roaming.
In current CMMB mobile phone wireless communication products, receiver system substantially uses zero-if architecture, because in zero
Frequently structure is that radiofrequency signal is direct down-conversion-to base band, and advantage has a lot, particularly simple in construction, low cost, image signal
It is self, there is no the mirror image suppression problem of super-heterodyne architecture.
But, zero-if architecture there is also its shortcoming, as IQ branch road does not mate and the problems such as direct current mismatch, particularly because of version
The direct current mismatch that figure causes, will cause signal to demodulate normally.In current prior art, main solution is
By continuing to increase frequency mixer pipe sizing, reduce mismatch (mismatch) problem.
But, by strengthening the frequency mixer pipe sizing scheme with minimizing mismatch, inevitably will result in product area
Increase, the problems such as power consumption increases, cost increase, reduce properties of product.
Summary of the invention
It is an object of the invention to provide a kind of layout design method for double-balance passive frequency mixer, to ensure frequency mixer
The matching degree of active circuit technological angle, thus avoid producing the problem of direct current mismatch, improve double balanced passive mixers
Performance.
For solving above-mentioned technical problem, embodiments of the present invention provide the domain of a kind of double balanced passive mixers and set
Meter method, this double balanced passive mixers comprises input matching network, mixer core frequency-converter tube, baseband signal samples crystal
Pipe；
In the domain of described double balanced passive mixers, the active switch pipe generating tributary signal is positioned over generation should
The domain centre position of tributary signal, uses finger-cross structure to be positioned over the two of active circuit the electric capacity generating this tributary signal
Side；
Described tributary signal comprises I road signal and Q road signal.
Active pipe in terms of existing technologies, by laying out pattern, is placed on and generates this by embodiment of the present invention
The domain centre position of road signal, it is achieved active circuit process corner is mated, electric capacity uses finger-cross structure to be placed on both sides, it is achieved electric capacity
Process corner is mated.Owing to process mismatch is one of reason producing direct current mismatch, therefore, by coupling active circuit, Ke Yiyou
Effect controls the generation of direct current mismatch, thus improves the performance of double balanced passive mixers.And, by active switch pipe and electric capacity
The change of the position relationship on domain, to guarantee that active circuit technological angle mates, it is not necessary to strengthens frequency mixer pipe sizing, from
And ensure that the advantage that overall applicability chip area is little.
Further, in the domain of double balanced passive mixers, resistance and electric capacity use finger-cross structure, to protect further
Demonstrate,prove technologic differential symmetry.
Further, in the domain of double balanced passive mixers, by rf signal line (RF holding wire) and the basis intersected
Shake holding wire (LO holding wire), is set to intersect vertically.By RF holding wire is intersected vertically with LO holding wire, can effectively subtract
Few parasitic capacitance between LO holding wire and RF holding wire, thus reduce local oscillator leakage, improve the linearity.Due to local oscillator leakage also
It is one of reason producing direct current mismatch, therefore, on the basis of guaranteeing active circuit technological angle coupling, reduces local oscillator and let out
Dew, can avoid the generation of direct current mismatch further.On the premise of not increasing chip area, power consumption and cost, improve double flat
The performance of weighing apparatus passive frequency mixer, improves the sensitivity of communication system.
Further, in the domain of double balanced passive mixers, rf signal line and disjoint local oscillation signal line it
Between distance, more than pre-determined threshold.Preferably, between rf signal line and disjoint local oscillation signal line, domain is kept to allow
Ultimate range.By keeping vertical relation with LO holding wire when RF holding wire intersects, when not intersecting, keep as far as possible away from
From, to reduce the parasitic capacitance of RF holding wire and LO holding wire further, and then the problem guaranteeing to solve local oscillator leakage, it is to avoid straight
Loss is joined.
Further, double balanced passive mixers can also comprise embedded filters, permissible by embedded filters
Input signal to this double balanced passive mixers carries out AF panel further, thus ensures the accuracy of demodulated signal.
Further, in the domain of double balanced passive mixers, produce components and parts and the generation Q road signal of I road signal
Components and parts adjacent be set with arranged side by side, and produce the components and parts of I road signal and the components and parts producing Q road signal keep symmetry.Logical
Cross producing the components and parts of I road signal and the components and parts adjacent be set with arranged side by side producing Q road signal, IQ two-way can be kept close,
And IQ keeps absolute symmetry, cause the mismatch of orthogonal I/Q signal with reduction process deviation further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the linear passive frequency mixer weighed according to the double flat in first embodiment of the invention；
Fig. 2 is according to the structural representation of the double balanced passive mixers of Embedded Filter in first embodiment of the invention
Figure；
Fig. 3 is the layout design schematic diagram according to the double balanced passive mixers in first embodiment of the invention；
Fig. 4 is the layout design schematic diagram according to the double balanced passive mixers in second embodiment of the invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawing each reality to the present invention
The mode of executing is explained in detail.But, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order to make reader be more fully understood that, the application proposes many ins and outs.But, even if there is no these ins and outs and base
Many variations and amendment in following embodiment, it is also possible to realize the application each claim technical side required for protection
Case.
First embodiment of the present invention relates to a kind of layout design method for double-balance passive frequency mixer, can apply
In the radio frequency chip front-end system of CMMB mobile TV.Specifically, the linear passive frequency mixer of double flat weighing apparatus is as it is shown in figure 1, vacation
If amplifier input keeps virtual earth state, M1-M4 is operated in linear zone.In this frequency mixer, the filter that operational amplifier is constituted
On the one hand ripple/amplifying circuit filters high-frequency signal, and on the other hand output electric current is converted into voltage (i.e. amplifying across resistance), and by base
Band output voltage.
Double balanced passive mixers of the present embodiment is as in figure 2 it is shown, include embedded filters so that this mixes
Frequently device is possible not only to be down-converted to radiofrequency signal baseband signal, can also suppress out-of-band interference simultaneously.Such as Fig. 2 institute
Show, this double balanced passive mixers (Mixer) by mixer core frequency-converter tube 1, embedded filters (as resistance capacitance RC filter
Device) 2, baseband signal samples transistor 3 forms.BBN in Fig. 2 represents that baseband signal negative terminal exports, and BBP represents that baseband signal is just
End output, RFP represents that radiofrequency signal anode exports, and RFN represents that radiofrequency signal negative terminal exports, and LON represents that local oscillation signal negative terminal is defeated
Going out, LOP represents that local oscillation signal anode exports.In the present embodiment, in the domain of this double balanced passive mixers, will generate
The active switch pipe of tributary signal is positioned over the domain centre position generating this tributary signal, will generate the big electricity of this tributary signal
Hold the both sides using finger-cross structure to be positioned over active circuit, as shown in Figure 3.Wherein, tributary signal comprises I road signal and Q road letter
Number.It addition, in order to ensure differential symmetry, resistance (R) and electric capacity (C) use finger-cross structure.Needed for generating I/Q road signal
Active switch pipe (such as PMOS or NMOS tube), the components and parts such as bulky capacitor belong to techniques known, the most superfluous at this
State.
It will be understood by those skilled in the art that by active pipe being placed on the domain interposition generating this tributary signal
Putting, bulky capacitor is placed on both sides, it can be ensured that active circuit technological angle mates.And owing to process mismatch is to produce direct current mismatch
One of reason, therefore, by assuring that active circuit technological angle coupling, can effectively control the generation of direct current mismatch, thus carry
The performance of high double balanced passive mixers.And, by the change of active switch pipe Yu bulky capacitor position relationship on domain,
To guarantee that active circuit technological angle mates, it is not necessary to strengthen frequency mixer pipe sizing, thus ensure that overall applicability chip area
Little advantage.
It addition, it is noted that in the domain of double balanced passive mixers as shown in Figure 3, by rf signal line
(RF holding wire) and the local oscillation signal line (LO holding wire) intersected, be set to intersect vertically；RF holding wire is believed with disjoint LO
Distance between number line, more than pre-determined threshold.Preferably, between RF holding wire and disjoint LO holding wire, domain is kept to permit
The ultimate range permitted.
Owing to the local oscillator leakage (LO leakage) in frequency mixer can cause local oscillation signal to be mixed with local oscillation signal self, also
It it is one of reason causing direct current mismatch.And the main cause of local oscillator leakage is the parasitic electricity between LO holding wire and RF holding wire
Holding and determine, therefore, solve local oscillator leakage it is crucial that parasitic capacitance between LO and RF to be reduced.And by RF holding wire with
Keep vertical relation time LO holding wire intersects, when not intersecting, keep at a distance as far as possible, can effectively reduce LO holding wire and believe with RF
Parasitic capacitance between number line, thus reduce local oscillator leakage, improve the linearity.
It is to say, present embodiment is on the basis of guaranteeing active circuit technological angle coupling, by RF holding wire
Keep vertical relation when intersecting with LO holding wire, when not intersecting, keep at a distance as far as possible, further avoid the product of direct current mismatch
Raw, on the premise of not increasing chip area, power consumption and cost, improve the performance of double balanced passive mixers, improve logical
The sensitivity of communication system.
The double balanced passive mixers being additionally, since present embodiment also includes embedded filters, such that it is able to right
The input signal of this double balanced passive mixers carries out AF panel, it is ensured that the accuracy of demodulated signal.
Second embodiment of the present invention relates to a kind of layout design method for double-balance passive frequency mixer.Second embodiment party
Formula has done further improvement on the basis of the first embodiment, mainly thes improvement is that: in second embodiment of the invention
In, also need to keep IQ two-way close, to reduce the mismatch that process deviation causes, and absolute symmetry.
Specifically, as shown in Figure 4, in the domain of the double balanced passive mixers of present embodiment, I road signal is produced
Components and parts and produce the components and parts adjacent be set with arranged side by side of Q road signal, and produce the components and parts of I road signal and produce Q road letter
Number components and parts keep symmetry.
It will be understood by those skilled in the art that relative first embodiment, the double balanced passive mixers of present embodiment
It is possible not only to solve the problem that direct current be excuse me, but I must be leaving now, it is also possible to optimize the unmatched problem of IQ branch road further, from the angle of domain very
The good deficiency solving zero intermediate frequency scheme, has design simple in construction, and domain is symmetrical, LO Yu RF minimal parasitic electric capacity, performance
Preferably, low in energy consumption, the advantages such as overall applicability chip area is little, improve systematic function so that high-performance Embedded Filter function
Mixer solution be achieved.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (8)
1. a layout design method for double-balance passive frequency mixer, described double balanced passive mixers comprises input pair net
Network, mixer core frequency-converter tube, baseband signal samples transistor, it is characterised in that
In the domain of described double balanced passive mixers, the active switch pipe generating tributary signal is positioned over this branch road of generation
The domain centre position of signal, uses finger-cross structure to be positioned over the both sides of active circuit the electric capacity generating this tributary signal；
Described tributary signal comprises I road signal and Q road signal.
Layout design method for double-balance passive frequency mixer the most according to claim 1, it is characterised in that
In the domain of described double balanced passive mixers, resistance and electric capacity use finger-cross structure.
Layout design method for double-balance passive frequency mixer the most according to claim 1, it is characterised in that
In the domain of described double balanced passive mixers, by rf signal line and the local oscillation signal line intersected, it is set to vertical
Intersect.
Layout design method for double-balance passive frequency mixer the most according to claim 1, it is characterised in that
In the domain of described double balanced passive mixers, the distance between rf signal line and disjoint local oscillation signal line,
More than pre-determined threshold.
Layout design method for double-balance passive frequency mixer the most according to claim 4, it is characterised in that
Between described rf signal line and described disjoint local oscillation signal line, keep the ultimate range that domain allows.
Layout design method for double-balance passive frequency mixer the most according to claim 1, it is characterised in that described double flat weighs
Passive frequency mixer also comprises embedded filters.
Layout design method for double-balance passive frequency mixer the most according to claim 6, it is characterised in that
Described embedded filters is resistance capacitance RC wave filter.
Layout design method for double-balance passive frequency mixer the most according to any one of claim 1 to 7, its feature exists
In,
In the domain of described double balanced passive mixers, produce the components and parts of I road signal and produce the components and parts of Q road signal also
Arrange adjacent be set with, and the components and parts producing I road signal keep symmetry with the components and parts producing Q road signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161216.7A CN103427767B (en) | 2012-05-18 | 2012-05-18 | Layout design method for double-balance passive frequency mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161216.7A CN103427767B (en) | 2012-05-18 | 2012-05-18 | Layout design method for double-balance passive frequency mixer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103427767A CN103427767A (en) | 2013-12-04 |
| CN103427767B true CN103427767B (en) | 2016-12-14 |
Family
ID=49652044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210161216.7A Active CN103427767B (en) | 2012-05-18 | 2012-05-18 | Layout design method for double-balance passive frequency mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103427767B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106156435A (en) * | 2016-07-12 | 2016-11-23 | 成都泰格微电子研究所有限责任公司 | A kind of 2 ~ 4 GHz GaAs passive double balanced mixer chip and methods for designing thereof |
| CN113676138B (en) * | 2021-08-23 | 2023-04-18 | 电子科技大学 | High-spurious suppression passive multi-local-oscillation frequency mixer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102474260A (en) * | 2009-07-01 | 2012-05-23 | 高通股份有限公司 | Low power lo distribution using a frequency-multiplying subharmonically injection-locked oscillator |
-
2012
- 2012-05-18 CN CN201210161216.7A patent/CN103427767B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102474260A (en) * | 2009-07-01 | 2012-05-23 | 高通股份有限公司 | Low power lo distribution using a frequency-multiplying subharmonically injection-locked oscillator |
Non-Patent Citations (1)
| Title |
|---|
| "低噪声零中频混频器";潘兆琳;《中国优秀硕士学位论文全文数据库（电子期刊）信息科技辑》;20101115;第2010年卷(第11期);I135-177，正文第1-102页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103427767A (en) | 2013-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101212441B (en) | Method and system for processing signal in communication system | |
| US6529721B1 (en) | Low-noise mixer and method | |
| CN110784179B (en) | Double-balance FET mixer | |
| CN102273196A (en) | Programmable if output receiver, and applications thereof | |
| CN112491364B (en) | Millimeter wave CMOS quadrature mixer circuit | |
| CN111211737B (en) | High harmonic rejection ratio mixer circuit | |
| CN106921346A (en) | High linearity wide band upper frequency mixer | |
| US8311477B2 (en) | High-frequency switching circuit and radio communication device | |
| WO2023221541A1 (en) | 5g millimeter-wave dual-band dual-mode mixer and wireless communication terminal | |
| KR100974574B1 (en) | Resistive frequency mixer and signal processing method using by it | |
| TW200414667A (en) | Analog demodulator in a low-if receiver | |
| CN103427767B (en) | Layout design method for double-balance passive frequency mixer | |
| CN103457618B (en) | Radio frequency chip front-end system and signal processing method thereof | |
| US11632098B2 (en) | Polyphase filter with interphase coupling | |
| CN102270965B (en) | Mixer circuit and local oscillation leakage suppression method for mixer circuit | |
| CN203399199U (en) | Universal tuner and digital television receiver system | |
| KR20210006989A (en) | Joint Design of Transmit/Receive (T/R) Switch for Broadband MIMO Receiver for Millimeter-Wave 5G Communication and Broadband Matching of Receiver Front End | |
| Mansour et al. | Analysis and design of a reconfigurable wideband I/Q modulator and Ultra-Wideband I/Q demodulator for multi-standard applications | |
| US20220060200A1 (en) | Phase Shifter with Compensation Circuit | |
| CN106209158B (en) | Carrier leakage eliminating system based on UHF RFID reader-writer | |
| CN116455355A (en) | Bidirectional vector modulation active phase shifter and electronic equipment | |
| US11658689B2 (en) | T-switch with shunt for improved receiver sensitivity | |
| Zhu et al. | A millimeter-wave fundamental and subharmonic hybrid CMOS mixer for dual-band applications | |
| KR102347261B1 (en) | Double balanced frequency conversion mixer with frequency selective characteristics | |
| CN113595506A (en) | Active mixer based on noise cancellation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |