CN103166902A - Orthogonal modulator radio frequency integrated circuit with high linearity - Google Patents
Orthogonal modulator radio frequency integrated circuit with high linearity Download PDFInfo
- Publication number
- CN103166902A CN103166902A CN2013100861364A CN201310086136A CN103166902A CN 103166902 A CN103166902 A CN 103166902A CN 2013100861364 A CN2013100861364 A CN 2013100861364A CN 201310086136 A CN201310086136 A CN 201310086136A CN 103166902 A CN103166902 A CN 103166902A
- Authority
- CN
- China
- Prior art keywords
- circuit
- common mode
- radio frequency
- output
- module
- 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.)
- Pending
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses an orthogonal modulator radio frequency integrated circuit. A circuit module comprises a mixer core, a load circuit, a pre-positive fourfold frequency divider module and a common mode feedback circuit, wherein the mixer core is the core of the whole circuit and improves frequency conversion linearity of the system by using a novel structure, a pre-positive fourfold frequency divider mainly generates strict orthogonal difference local oscillator signals, and the common mode feedback circuit comprises a common mode electric potential fetching circuit and an error operational amplifier. According to the orthogonal modulator radio frequency integrated circuit, single side band radio-frequency signals with high mirror image suppression degree are generated by overlying in-phase and orthogonal mixing output signals on the shared load circuit in current mode, and the module is easy to connect with a front end module of a radio frequency transmitter by using the output common mode feedback circuit to control direct current operating points of output differential signals. The orthogonal modulator radio frequency integrated circuit is high in linearity, low in power consumption, low in noise, high in mirror image suppression, and simple in structure.
Description
Technical field
The present invention relates to a kind of radio frequency integrated circuit, relate in particular to a kind of quadrature modulator radio frequency integrated circuit.
Background technology
Radio frequency integrated circuit is widely used in every field such as Industry Control, military technology, consumer electronics, automotive electronics etc., and Internet technology is very universal, according to people's daily life and requirements of one's work, the application of wireless network more and more receives everybody concern, the development that the correlation technique of WLAN (wireless local area network) WLAN is just being maked rapid progress, and the hardware technology of WLAN is mainly reflected on radio frequency transceiver, and wherein orthogonal modulation technique used is exactly one and has challenging research.
Summary of the invention
The technical problem to be solved in the present invention is under certain system power dissipation restriction, adopts a kind of circuit structure of high linearity to realize quadrature modulator used in the WLAN radio frequency sending set.This circuit adopts certain integrated circuit technology (SMIC 0.18
M RF CMOS technique) realize.
Quadrature modulator radio frequency integrated circuit of the present invention, it is characterized in that comprising high linearity mixer cores, shared common load circuit, preposition four-divider module and common mode feedback circuit, wherein mixer cores is the core of whole circuit, adopts a kind of novel structure to come the frequency conversion linearity of elevator system; Preposition four-divider mainly produces strict orthogonal difference local oscillating; Common mode feedback circuit comprises that the common mode current potential takes out circuit and error amplifier.The present invention superposes on shared common load circuit with current system by homophase and quadrature two-way mixer output signal, produce the single-side belt radiofrequency signal of high mirror image inhibition degree, control the dc point of output difference sub-signal by the output common mode feedback circuit, make this module be easy to carry out interface with the radio frequency sending set front-end module.
The present invention is converted to baseband signal (bandwidth 10MHz) near the 1GHz carrier frequency by quadrature modulation, wherein adopt the digital modulation technique of OFDM in base band due to the wlan system that is suitable for, linearity to radio frequency sending set is higher, therefore the present invention proposes a kind of novel circuit configuration and can reach the higher linearity, has also kept enough allowances on the basis of satisfying the wlan system requirement.
Description of drawings
Fig. 1: structured flowchart of the present invention;
Fig. 2: circuit theory diagrams of the present invention;
Fig. 3: chip layout of the present invention.
The specific works mode
As shown in Figure 1.A kind of quadrature modulator radio frequency integrated circuit, it is characterized in that comprising high linearity mixer cores, shared common load circuit, preposition four-divider module and common mode feedback circuit, wherein mixer cores is the core of whole circuit, adopts a kind of novel structure to come the frequency conversion linearity of elevator system; Preposition four-divider mainly produces strict orthogonal difference local oscillating; Common mode feedback circuit comprises that the common mode current potential takes out circuit and error amplifier.The present invention superposes on shared common load circuit with current system by homophase and quadrature two-way mixer output signal, produce the single-side belt radiofrequency signal of high mirror image inhibition degree, control the dc point of output difference sub-signal by the output common mode feedback circuit, make this module be easy to carry out interface with the radio frequency sending set front-end module.
First introduce the input/output interface of modulator block of the present invention, with reference to illustrated in figures 1 and 2,
Traditional modulator is take Gilbert cell as core, and inputting in addition, pre-process circuit improves the linearity.But such structure is too complicated, and also very limited to the improvement of the linearity.If add on this basis the further scales that enlarge circuit of technology meeting such as electric current injection, power consumption also can become problem on the other hand.
Adopted a kind of novel circuit structure to complete modulation in the design.As shown in Figure 2, this structure takes full advantage of square-law characteristic and the cross-linked concept of MOS device, and wherein, PMOS manages M
5~ M
8Consist of input stage, input signal is followed respectively M
1~ M
4Source class, such input stage circuit can be avoided M effectively
1~ M
4The load effect that the low input impedance of source class produces input signal.Can think equivalently that like this local oscillation signal and base-band input signal have been added in respectively M
1~ M
4Grid and source class, if
They can be operated in the saturation region, according to the transconductance characteristic of metal-oxide-semiconductor, can produce one group of electric current in their leakage level so, as the formula (1),
（1）
Wherein,
, the I paths just can be expressed as formula (2) to the contribution of electric current of intermediate frequency:
Can find out, strictly realized the modulation to input signal on Circuit theory, it is very large that the linearity of modulation can reach.
Fig. 3 is chip layout of the present invention, because domain can be introduced suitable dead resistance and crucial parasitic capacitance after putting forward ginseng.Therefore the design of domain need to be considered these nonideal factors, and due to circuit fully differential structure, the symmetrical cabling of can trying one's best disturbs to reduce radio frequency EMC; Line is as far as possible short, reduces the effect of parasitic parameter; Simulation separates with numerical portion, performs isolation, and particularly analog power and digital power will separately provide at chip internal; The related devices such as high precision operating amplifier, current mirror and attach ratios resistance (common mode electrical level taking-up circuit) need to perform coupling, to reduce the adverse effect of Mismatch and Offset generation, avoid worsening the characteristic index of circuit; The filter capacitor that powers up the seedbed in chip vacant place can effectively improve the Electro Magnetic Compatibility of inside modules.
See that from the output waveform of emulation circuit effectively realized the function of modulation, frequency conversion, and realized the radio circuit design of low-voltage, low-power consumption.From harmonic wave emulation, the input gain compression point of circuit is higher, has realized high linearity, and gain suitably needs the front radio-frequency power amplifier to compensate.
Claims (7)
1. quadrature modulator radio frequency integrated circuit, it is characterized in that comprising high linearity mixer cores, shared common load circuit, preposition four-divider module and common mode feedback circuit, wherein mixer cores is the core of whole circuit, adopts a kind of novel circuit structure to come the frequency conversion linearity of elevator system; Preposition four-divider mainly produces strict orthogonal difference local oscillating; Common mode feedback circuit comprises that the common mode current potential takes out circuit and error amplifier.
2. the present invention superposes on shared common load circuit with current system by homophase and quadrature two-way mixer output signal, produce the single-side belt radiofrequency signal of high mirror image inhibition degree, control the dc point of output difference sub-signal by the output common mode feedback circuit, make this module be easy to carry out interface with the radio frequency sending set front-end module.
3. quadrature modulator radio frequency chip according to claim 1, is characterized in that described high linearity mixer cores comprises in-phase branch and quadrature branch, and take in-phase branch as example, it comprises M
1~ M
8Totally 8 MOS field-effect transistors, wherein M
1~ M
4Be N-type metal-oxide-semiconductor, M
5~ M
8Be P type metal-oxide-semiconductor.
4. concrete, M
1And M
5, M
2And M
6, M
3And M
7, M
4And M
8The source drain terminal joins respectively; M
5And M
6, M
7And M
8Be connected into respectively parallel form; M
1And M
2, M
3And M
4Be connected into respectively the differential pair form; M
1And M
3, M
2And M
4Drain terminal is connected and from taking out the output signal electric current here respectively.
5. quadrature modulator radio frequency chip according to claim 1, is characterized in that described common mode feedback circuit comprises that common mode electrical level takes out circuit and error operational amplifier.
6. common mode electrical level is by two resistance R connected in series
1, R
2The middle taking-up, this level is delivered to the positive input terminal of error amplifier, compares with reference voltage, and the generation control signal feeds back to the transistor M as the shared load current source
9, M
10Grid, and then adjust the size of output common mode level.
7. float when high when the common-mode voltage value, output voltage error amplifier rises, and controls M
9, M
10Make transistor output current diminish, thereby the output common mode level is forced to pull down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100861364A CN103166902A (en) | 2013-03-19 | 2013-03-19 | Orthogonal modulator radio frequency integrated circuit with high linearity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100861364A CN103166902A (en) | 2013-03-19 | 2013-03-19 | Orthogonal modulator radio frequency integrated circuit with high linearity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103166902A true CN103166902A (en) | 2013-06-19 |
Family
ID=48589649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100861364A Pending CN103166902A (en) | 2013-03-19 | 2013-03-19 | Orthogonal modulator radio frequency integrated circuit with high linearity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103166902A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564628A (en) * | 2020-12-08 | 2021-03-26 | 东南大学 | Modulator with wide frequency band and high intrinsic vibration suppression degree |
| CN115483958A (en) * | 2022-08-17 | 2022-12-16 | 西安空间无线电技术研究所 | Low-noise receiving high-precision phase measurement system and method for microwave ranging signals |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075145A (en) * | 2011-01-11 | 2011-05-25 | 东南大学 | High-linearity folding image mixer |
| CN102522955A (en) * | 2011-12-31 | 2012-06-27 | 东南大学 | Mixer |
| US20120281550A1 (en) * | 2010-01-20 | 2012-11-08 | Huawei Technologies Co., Ltd. | Receiver, transmitter, feedback device, transceiver and signal processing method |
-
2013
- 2013-03-19 CN CN2013100861364A patent/CN103166902A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120281550A1 (en) * | 2010-01-20 | 2012-11-08 | Huawei Technologies Co., Ltd. | Receiver, transmitter, feedback device, transceiver and signal processing method |
| CN102075145A (en) * | 2011-01-11 | 2011-05-25 | 东南大学 | High-linearity folding image mixer |
| CN102522955A (en) * | 2011-12-31 | 2012-06-27 | 东南大学 | Mixer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564628A (en) * | 2020-12-08 | 2021-03-26 | 东南大学 | Modulator with wide frequency band and high intrinsic vibration suppression degree |
| CN112564628B (en) * | 2020-12-08 | 2023-08-08 | 东南大学 | Modulator with wide frequency band high local oscillation inhibition degree |
| CN115483958A (en) * | 2022-08-17 | 2022-12-16 | 西安空间无线电技术研究所 | Low-noise receiving high-precision phase measurement system and method for microwave ranging signals |
| CN115483958B (en) * | 2022-08-17 | 2023-07-28 | 西安空间无线电技术研究所 | Low-noise receiving high-precision phase measurement system and method for microwave ranging signals |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chowdhury et al. | Design considerations for 60 GHz transformer-coupled CMOS power amplifiers | |
| Calderin et al. | Analysis and design of integrated active cancellation transceiver for frequency division duplex systems | |
| CN112491364B (en) | Millimeter wave CMOS quadrature mixer circuit | |
| Kuang et al. | A fully integrated 60-GHz 5-Gb/s QPSK transceiver with T/R switch in 65-nm CMOS | |
| Ying et al. | A HBT-based 300 MHz-12 GHz blocker-tolerant mixer-first receiver | |
| CN104779917A (en) | Receiver front-end circuit based on integrated inductor noise cancelling technology | |
| CN104124932B (en) | Radio frequency power amplification module | |
| CN105340185A (en) | Current conveyor circuit and method | |
| US10097223B2 (en) | Low power supply voltage double-conversion radio frequency receiving front end | |
| CN101834563B (en) | Complementary folding radio-frequency CMOS orthogonal down-conversion mixer | |
| CN103166902A (en) | Orthogonal modulator radio frequency integrated circuit with high linearity | |
| Lai et al. | Integrated chip design of a 10GHz band voltage controlled oscillator and charge-injected mixer with low phase noise and wide tuning range | |
| Katayama et al. | 28mW 10Gbps transmitter for 120GHz ASK transceiver | |
| JP6595844B2 (en) | Digital variable capacitance circuit, resonance circuit, amplifier circuit, and transmitter | |
| CN103117707B (en) | Lower power consumption high gain upper mixer | |
| CN204156825U (en) | Radio-frequency power amplifier | |
| Cheng et al. | An improved current bleeding mixer based on cmos technology | |
| Chen et al. | A V-band inverse class F power amplifier with 16.3% PAE in 65nm CMOS | |
| Luo et al. | A 64dB gain 60GHz receiver with 7.1 dB noise figure for 802.11 ad applications in 90nm CMOS | |
| US9331635B2 (en) | Quadrature modulator | |
| KR20150040412A (en) | Ultra wideband amplifier | |
| CN104009718B (en) | Active Balun circuit for broadband low detuning | |
| Sun et al. | A 1.8–2.6 GHz RF CMOS up-conversion mixer for wideband applications | |
| TW201306472A (en) | Local oscillator clock signals | |
| US8855590B2 (en) | Radio frequency signal receiving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130619 |