CN104617970B - Fully-integrated anti-blocking radio frequency receiving front-end architecture - Google Patents
Fully-integrated anti-blocking radio frequency receiving front-end architecture Download PDFInfo
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- CN104617970B CN104617970B CN201510066420.4A CN201510066420A CN104617970B CN 104617970 B CN104617970 B CN 104617970B CN 201510066420 A CN201510066420 A CN 201510066420A CN 104617970 B CN104617970 B CN 104617970B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
Abstract
The invention discloses a fully-integrated anti-blocking radio frequency receiving front-end architecture. The fully-integrated anti-blocking radio frequency receiving front-end architecture comprises a blocking signal filtering stage and a down mixing stage. The blocking signal filtering stage is a feed-forward structure, and a main branch and a feed-forward branch use low-noise amplifiers with the same circuit structures to realize matching. The feed-forward branch uses the impedance moving feature of a passive mixer at the frequency domain, a band elimination filter is generated at a radio frequency local oscillator to filter useful signals, and then a usable radio frequency signal is obtained through subtracting the obtained blocking signal from the blocking signal of the main branch. Because the blocking signal is directly filtered after two low-noise amplifiers, the influence on the other circuit is avoided, and the other non-ideal factors are avoided. The down mixing is realized to obtain a usable middle-frequency signal through connecting the passive mixer.
Description
Technical field
The invention belongs to wireless telecommunications receiver field, it is related to a kind of fully integrated antiblocking receiver rf front-end framework.
Background technology
Wireless communication technology is widely used now, and the finiteness yet with frequency spectrum resource is so that deposit in common frequency band
In substantial amounts of user.The ISM band sharing for various countries as 2.4GHz, the therefore wireless network such as WLAN, bluetooth, ZigBee
Network, is all operated in 2.4GHz frequency range.The strong transmission signal of emitter is for other receivers of channel neighbouring in required frequency band
For be a kind of block signal.Significantly block signal can make the working condition of transistor in receiver offset, and causes
The gain of receiver declines, the penalty such as noise coefficient and the linearity, or even receiver can be made cannot to work.In order to eliminate resistance
The impact that plug signal causes to receiver integrated circuit is it is necessary to point radio-frequency front-end foremost is eliminated from receiver.
There are Broadcom Corp, European microelectronics research center and Cornell Univ USA etc. internationally famous at present in the world
Communication semiconductor company, microelectronics research center and university are studied to fully integrated antiblocking receiver rf front-end, and obtain
Certain achievement.But, existing fully integrated antiblocking receiver rf front-end has clearly disadvantageous, the feedforward of Botong and anti-
Feedback structure is to move the high-pass filter of Low Medium Frequency using the mixing function of frequency mixer to form radio frequency band resistance at RF local oscillator
Wave filter, not only two branch roads mismatch such structure, and block signal can through the down-conversion mixer in feedforward branch circuit and
The circuit such as the high-pass filter of Low Medium Frequency, this can deteriorate the linearity, causes gain compression, deteriorates noise coefficient.European microelectronics
The voltage-mode fully integrated antiblocking receiver rf front-end framework in research center, because be directly to adopt voltage form, to electricity
The requirement on road is very high.In order to ensure the linearity, in the achievement in this research center, use the 2.5V's of a supply voltage
LNA.The LNA-less structure of health Nellie university of the U.S. has the good linearity, but its noiseproof feature is poor, and isolates effect
Really poor, local oscillation signal easily leaks into antenna, deteriorates frequency domain resource environment.
Content of the invention
Technical problem：The present invention proposes a kind of complete or collected works solving the impact to receiver for the block signal in frequency domain environment
Become antiblocking receiver rf front-end framework.
Technical scheme：The fully integrated antiblocking receiver rf front-end framework of the present invention, including radio frequency block signal filtering stage
With lower mixer stage, described radio frequency block signal filtering stage includes the first low-noise amplifier, the second low-noise amplifier, subtraction
Computing circuit and load stage, described first low-noise amplifier is connected with differential ends of subtraction circuit, and described second
Low-noise amplifier is connected with another differential ends of subtraction circuit, the second low-noise amplifier simultaneously also with load cascade
Connect, radio frequency band is hindered filtering stage and is connected with lower mixer stage by the output end of subtraction circuit.
In the preferred version of the present invention, described load stage is connected by the second passive switching mixers and the second trans-impedance amplifier
Form, the input of the second passive switch mixer stage is connected with the output end of the second low-noise amplifier.
In the preferred version of the present invention, the output end of described subtraction circuit is also associated with LC laod network.
In the preferred version of the present invention, the first trsanscondutance amplifier that described lower mixer stage includes being sequentially connected, first passive
Switching mixer and the first trans-impedance amplifier.
In the preferred version of the present invention, the output frequency response curve of described first low-noise amplifier assumes all-pass spy
Property, the output frequency response curve of described second low-noise amplifier and load stage assumes band-stop response.Using passive frequency mixer
Impedance move characteristic, the intermediate frequency impedance high pass characteristic of trans-impedance amplifier is moved at RF local oscillator, formed radio frequency band resistance filter
Ripple device.Using feed forward architecture, the output of radio frequency filter and LNA is subtracted each other, realize two paths of signals and subtract each other, obtain radio frequency
Useful signal.Obtain intermediate frequency useful signal through down-conversion mixer down coversion again.
This receiver rf front-end framework comprises block signal filtering stage and lower mixer stage.Before block signal filtering stage is one
Feedback structure, comprise the first low-noise amplifier, the second low-noise amplifier, the second passive switching mixers, second across resistance amplify
Device, L1 and C1.Wherein the first low-noise amplifier of main branch and the second low-noise amplifier of feedforward branch circuit are identicals,
Realize the matched of two branch roads.Second low-noise amplifier, the second passive switching mixers and the second trans-impedance amplifier group
Become a passive frequency mixer.Move characteristic because passive frequency mixer has to impedance in frequency domain, so the second trans-impedance amplifier
Input impedance characteristic moved at local frequency by the second passive switching mixers, in the output end of the second low-noise amplifier
Useful signal is filtered and is retained block signal.Output end by the first low-noise amplifier and the second low-noise amplifier
Composition subtracts each other and obtains radio frequency useful signal, and block signal is filtered.This framework is in block signal through the first low noise amplification
Directly filtered after device and the second low-noise amplifier, brought more unreasonablys without being introduced into other circuit modules
Think factor.LC network, as load, inductance and the parasitic capacitance resonance of this point, is revealed with reducing the useful current signal of radio frequency.Under
Mixer stage is a passive frequency mixer, comprises the first trsanscondutance amplifier, the first passive switching mixers and the first trans-impedance amplifier,
It is converted into the useful current signal of radio frequency through the first trsanscondutance amplifier, the first passive switching mixers are modulated to it, in obtaining
Frequently useful current signal, useful for intermediate frequency current signal is converted to intermediate frequency useful voltage signal by the first trans-impedance amplifier.Because no
The advantage of the performance such as source frequency mixer degree more linear than traditional active mixer and noise coefficient, adopted passive frequency mixer is permissible
Improve the performance of radio-frequency front-end.
Beneficial effect：Compared with prior art, the present invention has advantages below：
Main branch of the present invention moves characteristic using what passive frequency mixer had to impedance in frequency, by passive frequency mixer
Switch mixer stage and across resistance level as LNA load, by the switching mixer of the linear zone that works by trans-impedance amplifier intermediate frequency
The input impedance of high pass impedance operator is moved and is formed radio frequency filter at RF local oscillator.Feedforward branch circuit is useful by radio frequency
Target signal filter and retain radio frequency block signal.Main branch adopts and feedforward branch circuit identical LNA.Subtracted each other by two branch roads
And obtain radio frequency useful signal.And the radio frequency filter in existing feed forward type antiblocking receiver rf front-end is to pass through
Upper and lower for intermediate frequency high-pass filter frequency conversion is formed by upper and lower frequency mixer.Due to needing elimination mirror image to make an uproar during Up/Down Conversion
Sound, so main branch needs I, Q two-way.So, the present invention is compared with prior art it is not necessary to the upper and lower mixing of I, Q two-way
Device and intermediate frequency high-pass filter, circuit structure is simple, saves circuit area and power consumption, and the LNA of two branch road employings is identical,
Matching degree is good.Due to directly eliminating block signal after radio frequency trsanscondutance amplifier, other circuit will not be impacted, institute
With not high to the linearity of intermediate frequency.Additionally, low-noise amplifier is capable of isolating well, local oscillation signal is difficult to reveal
Cause to deteriorate to antenna pair spectrum environment.
Brief description
Fig. 1 is the receiver rf front-end Organization Chart of the present invention；
Fig. 2 is the functional simulation figure of the receiver rf front-end of the present invention.
In figure has：First low-noise amplifier LNA1, the second low-noise amplifier LNA2, the first inductance L1, the first electric capacity
C1, the first trsanscondutance amplifier Gm1, the first passive switching mixers Pmixer1, the second passive switching mixers Pmixer2, first
Trans-impedance amplifier TIA1, the second trans-impedance amplifier TIA2, local oscillation signal input LO, subtraction circuit S, signal input part
RFIN, signal output part IFOUT.
Specific embodiment
With reference to embodiment and Figure of description, the present invention is further illustrated.
As shown in figure 1, fully integrated antiblocking receiver rf front-end framework proposed by the present invention is feed forward type structure, by radio frequency
Block signal filtering stage and lower mixer stage are formed by connecting, and radio frequency block signal is filtered and retains and penetrate by radio frequency block signal filtering stage
Frequency useful signal, radio frequency useful signal frequency conversion is become intermediate frequency useful signal by lower mixer stage.Described radio frequency block signal filtering
Level includes the first low-noise amplifier LNA1, the second low-noise amplifier LNA2, subtraction circuit S and load stage.Wherein main
Route first low-noise amplifier LNA1 is constituted, feedforward branch circuit by the second low-noise amplifier LNA2, subtraction circuit S and
Load stage forms.Described load stage is formed by connecting by the second passive switching mixers Pmixer2 and the second trans-impedance amplifier TIA2,
Second passive switching mixers Pmixer2 by the intermediate frequency high pass characteristic curve of the second trans-impedance amplifier TIA2 input impedance move to
At RF local oscillator, form radio frequency band-stop response.Move characteristic using what passive frequency mixer had to impedance in frequency, in radio frequency
The feedforward branch circuit of block signal filtering stage forms radio frequency filter.First low-noise amplifier LNA1 of main branch is one
All-pass radio frequency amplifier.Described main branch output stage is connected with differential ends of subtraction circuit S, and described feedforward branch circuit is defeated
Another differential ends going out level with subtraction circuit S are connected.By subtraction circuit S by the radio-frequency component of main branch（Bag
Include radio frequency block signal and radio frequency useful signal）Subtract each other with the radio frequency block signal of feedforward branch circuit, realize radio frequency band filter,
Radio frequency block signal is filtered and obtains radio frequency useful signal.The output end of described subtraction circuit S is also associated with LC load
Network, to increase the Q value of radio frequency band filter.Its specific annexation is：First low-noise amplifier LNA1 and second
The input of low-noise amplifier LNA2 is connected with rf inputs, and output end is respectively at an input of subtraction circuit S
End is connected；The output end of the second low-noise amplifier LNA2 input phase with the second passive switching mixers Pmixer2 simultaneously
Even；The output end of the second passive switching mixers Pmixer2 is connected with the input of the second trans-impedance amplifier TIA2；LC network is made
For the load of subtraction circuit S, the output end phase of the first inductance L1 negative terminal and the first electric capacity C1 negative terminal and subtraction circuit S
Even, the first inductance L1 anode and the first electric capacity C1 anode are connected with supply voltage.
Described lower mixer stage includes the first trsanscondutance amplifier Gm1, the first passive switching mixers Pmixer1 being sequentially connected
With the first trans-impedance amplifier TIA1.The radio frequency obtaining from radio frequency block signal filtering stage is had electricity consumption by the first trsanscondutance amplifier Gm1
Pressure signal is converted into the useful current signal of radio frequency, and the first passive switching mixers Pmixer1 is by useful for radio frequency current signal modulation
Become the useful current signal of intermediate frequency, then be converted into intermediate frequency useful voltage signal through the first trans-impedance amplifier TIA1.Its concrete connection is closed
It is to be：The input of the first trans-impedance amplifier TIA1 is connected with the output end of subtraction circuit S, and output end is passive with first to be opened
The input closing frequency mixer Pmixer1 is connected；The output end of the first passive switching mixers Pmixer1 and the first trans-impedance amplifier
The input of TIA1 is connected；The output termination medium frequency output end of the first trans-impedance amplifier TIA1.
Fig. 2 show the functional simulation figure of the receiver rf front-end of the present invention, it can be seen that this radio-frequency front-end pair
Block signal outside 40MHz bandwidth achieves the suppression of 20dB.
Above-described embodiment be only the preferred embodiment of the present invention it should be pointed out that：Ordinary skill for the art
For personnel, under the premise without departing from the principles of the invention, some improvement and equivalent can also be made, these are to the present invention
Claim improves and the technical scheme after equivalent, each falls within protection scope of the present invention.
Claims (3)
1. a kind of fully integrated antiblocking receiver rf front-end framework it is characterised in that：This framework is feed forward type structure, is hindered by radio frequency
Plug signal filtering level and lower mixer stage are formed by connecting, and described radio frequency block signal filtering stage includes the first low-noise amplifier
（LNA1）, the second low-noise amplifier（LNA2）, subtraction circuit（S）And load stage, described first low-noise amplifier
（LNA1）With subtraction circuit（S）Differential ends connect, described second low-noise amplifier（LNA2）With subtraction
Another differential ends of circuit connect, the second low-noise amplifier（LNA2）Also it is connected with load stage, radio frequency bandreject filtering simultaneously
Level passes through subtraction circuit（S）Output end be connected with lower mixer stage；Described load stage is by the second passive switching mixers
（Pmixer2) and the second trans-impedance amplifier（TIA2）It is formed by connecting, the second passive switching mixers（Pmixer2）Input with
Second low-noise amplifier（LNA2）Output end connect, described first low-noise amplifier（LNA1）Output frequency response bent
Line assumes all-pass characteristic, described second low-noise amplifier（LNA2）Assume band resistance spy with the output frequency response curve of load stage
Property.
2. fully integrated antiblocking receiver rf front-end framework according to claim 1 it is characterised in that：Described subtraction
Circuit（S）Output end be also associated with LC laod network.
3. fully integrated antiblocking receiver rf front-end framework according to claim 1 it is characterised in that：Described lower mixer stage
Including the first trsanscondutance amplifier being sequentially connected（LNA1）, the first passive switching mixers（Pmixer1）Amplify across resistance with first
Device（TIA1）.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510066420.4A CN104617970B (en) | 2015-02-10 | 2015-02-10 | Fully-integrated anti-blocking radio frequency receiving front-end architecture |
| PCT/CN2016/072557 WO2016127822A1 (en) | 2015-02-10 | 2016-01-28 | Fully-integrated anti-blocking radio frequency receiving front-end architecture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510066420.4A CN104617970B (en) | 2015-02-10 | 2015-02-10 | Fully-integrated anti-blocking radio frequency receiving front-end architecture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104617970A CN104617970A (en) | 2015-05-13 |
| CN104617970B true CN104617970B (en) | 2017-02-22 |
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| CN201510066420.4A Expired - Fee Related CN104617970B (en) | 2015-02-10 | 2015-02-10 | Fully-integrated anti-blocking radio frequency receiving front-end architecture |
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| Country | Link |
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| WO (1) | WO2016127822A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617970B (en) * | 2015-02-10 | 2017-02-22 | 东南大学 | Fully-integrated anti-blocking radio frequency receiving front-end architecture |
| CN106059604B (en) * | 2016-05-24 | 2018-08-10 | 东南大学 | A kind of antiblocking receiving radio frequency front end structure based on Signal separator |
| CN106028388B (en) * | 2016-07-18 | 2023-03-14 | 摩比天线技术（深圳）有限公司 | Receiver and circuit for improving uplink blocking of wireless communication base station |
| CN106888028A (en) * | 2017-04-12 | 2017-06-23 | 复旦大学 | A kind of high sensitivity receiver front-ends circuit with impedance mapping function |
| CN109302198B (en) * | 2017-07-24 | 2020-04-10 | 深圳市中兴微电子技术有限公司 | Wireless transceiver system and mixer circuit thereof |
| CN109167607B (en) * | 2018-10-12 | 2024-01-23 | 南京屹信航天科技有限公司 | Radio frequency circuit for miniaturized ODU receiving channel |
| CN109474294B (en) * | 2018-12-24 | 2024-01-23 | 南京屹信航天科技有限公司 | Uplink channel circuit for satellite-borne measurement and control equipment |
| US20220329268A1 (en) | 2021-04-07 | 2022-10-13 | Skyworks Solutions, Inc. | Systems and methods for diplexer circuits with leakage cancellation |
| CN114124123B (en) * | 2021-11-17 | 2023-03-14 | 成都信息工程大学 | Broadband integrated CMOS global feedback receiver front-end circuit |
| CN114499562A (en) * | 2022-01-20 | 2022-05-13 | 复旦大学 | High-sensitivity anti-blocking radio frequency receiver front end with impedance mapping function |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6046683A (en) * | 1996-12-31 | 2000-04-04 | Lucent Technologies Inc. | Modulated backscatter location system |
| DE60220102T2 (en) * | 2002-06-12 | 2008-01-10 | Nokia Corp. | MOBILE ELECTRONIC EQUIPMENT WITH AN AUDIOVER BINDER WITH ANTENNA FUNCTION |
| US7343146B2 (en) * | 2004-08-13 | 2008-03-11 | Nokia Corporation | Single chip LNA and VCO having similar resonant circuit topology and using same calibration signal to compensate for process variations |
| US7664461B2 (en) * | 2006-03-02 | 2010-02-16 | Broadcom Corporation | RFID reader architecture |
| FR2930093A1 (en) * | 2008-04-10 | 2009-10-16 | Somfy Sas | TRANSMITTER TYPE DEVICE AND / OR RECEIVER OF RADIO SIGNALS |
| CN101860373B (en) * | 2009-04-10 | 2013-03-06 | 晨星软件研发(深圳)有限公司 | Circuit and method for eliminating interference for receptor |
| CN104617970B (en) * | 2015-02-10 | 2017-02-22 | 东南大学 | Fully-integrated anti-blocking radio frequency receiving front-end architecture |
-
2015
- 2015-02-10 CN CN201510066420.4A patent/CN104617970B/en not_active Expired - Fee Related
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2016
- 2016-01-28 WO PCT/CN2016/072557 patent/WO2016127822A1/en active Application Filing
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| Publication number | Publication date |
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| CN104617970A (en) | 2015-05-13 |
| WO2016127822A1 (en) | 2016-08-18 |
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