CN102386874A - Wideband reconfigurable load network - Google Patents
Wideband reconfigurable load network Download PDFInfo
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- CN102386874A CN102386874A CN2011102063834A CN201110206383A CN102386874A CN 102386874 A CN102386874 A CN 102386874A CN 2011102063834 A CN2011102063834 A CN 2011102063834A CN 201110206383 A CN201110206383 A CN 201110206383A CN 102386874 A CN102386874 A CN 102386874A
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Abstract
The invention belongs to the technical field of radio frequency integrated circuits, and in particular relates to a wideband reconfigurable load network applied to a wideband multimode receiver. The wideband reconfigurable load network comprises an inductor, a voltage controlled resistance array (DCRA) and a voltage controlled capacitor array (DCCA). The voltage controlled capacitor array and the inductor are connected in parallel to form an LC (inductance/capacitor) parallel resonance network, the resonance network is sequentially connected with the voltage controlled resistance array in series to form an RLC (resistance/inductance/capacitor) load network; resonance frequency is adjusted by virtue of a switch of the voltage controlled capacitor array; and gains in different frequency bands are adjusted by virtue of a switch of the voltage controlled resistance array. The wideband reconfigurable load network provided by the invention has a simple structure and can achieve the reconfiguration of load network impedance in different frequency bands.
Description
Technical field
The invention belongs to technical field of radio frequency integrated circuits, be specifically related to a kind of broadband restructural RLC laod network.
This laod network has simple in structure, and flexible restructural characteristics can be carried out digital controlly to different application, and laod network is operated on the different frequency.Be applied to especially in the load of multimode rake receiver front end low noise amplifier and frequency mixer of 1.8 ~ 10.6GHz.Be applicable in the multimode rake receiver systems such as comprising GSM, LTE, WCDMA, Bluetooth, WLAN, UWB.
Background technology
The multimode radio-frequency receiver system is the research focus of current academia and industrial quarters.Through the compatibility of single receiver link realization plurality of communication schemes, can reduce the power consumption and the area of chip of complete machine simultaneously.In the receiver front end circuit, like low noise amplifier and frequency mixer, load circuit can influence the frequency range of front-end circuit work, bandwidth and gain.Therefore how designing one can be operated in the load circuit on the different frequency range flexibly, most important for multi-mode receiver.
Summary of the invention
The object of the invention provides a kind of broadband restructural laod network that is applied in the multi-mode receiver of broadband, to realize making circuit working on the desired frequency range of different communication modes through voltage cut-out.
Broadband restructural laod network in the broadband multi-mode receiver involved in the present invention is through the control to DCCA and DCRA; Can cover the broad frequency range of 1.8 ~ 10.6GHz; This structure can be applied in low noise amplifier load and the mixer load circuit; It is little to have area, and restructural covers characteristics such as bandwidth money.
The present invention provides a kind of broadband restructural laod network, and is as shown in fig. 1, is made up of inductance L, voltage control capacitor array DCCA and voltage control electric resistance array DCRA; Said voltage control capacitor array and the parallelly connected formation of said inductance LC series resonant network, this resonant network is connected with said voltage control electric resistance array in order, constitutes the RLC laod network; Through voltage control capacitor array switch, the adjustment resonance frequency; Through the switch of voltage control electric resistance array, the gain under the adjustment different frequency range.
Further, as shown in fig. 1, each the column capacitance array among this voltage control capacitor array DCCA connects switch SW cap by capacitor C a, connects capacitor C b then in order and forms, and such capacitor array plural parallel stage is formed above-mentioned voltage control capacitor array.
Further, as shown in fig. 1, each the row electric resistance array among this voltage control electric resistance array DCRA connects resistance R by switch SW res and forms, and such electric resistance array plural parallel stage is formed above-mentioned voltage control electric resistance array.
Further, as shown in Figure 2, open various combination, realize the restructural of the resonance point of said laod network through the shutoff of switch.
Further, in order to solve the load impedance Z shown in Fig. 1 at the low frequency place
LoadCombination is turn-offed, opened to lower problem through the switch that changes control voltage control electric resistance array DCRA, increases the resistance of voltage control electric resistance array DCRA array, improves the load impedance Z at low frequency place
LoadThrough reducing the equivalent resistance of voltage control electric resistance array DCRA array, increase the load impedance Z of high frequency treatment
LoadRealize effect such as Fig. 3 and shown in Figure 4.
Improvement of the present invention is mainly reflected in:
1, propose a kind of novel broadband restructural laod network, can realize that laod network works on the different frequency range through changing DCCA and DCRA control voltage, coverage can cover existing main communication standard from 1.8 ~ 10.6GHz.
2, study the characteristic of RLC network, be utilized in the corresponding different equivalent laod network resistance value Z of high and low frequency place heterogeneous networks parameter value
LoadCharacteristics are adjusted the Z under the various criterion
Load
3, said network has only used an inductance, just can cover frequency band from 1.8 ~ 10.6GHz, has saved area.
Laod network of the present invention has simple in structure, and flexible restructural characteristics can be carried out digital controlly to different application, and laod network is operated on the different frequency.Be applied to especially in the load of multimode rake receiver front end low noise amplifier and frequency mixer of 1.8 ~ 10.6GHz.Be applicable in the multimode rake receiver systems such as comprising GSM, LTE, WCDMA, Bluetooth, WLAN, UWB.
Description of drawings
Fig. 1: the design example block diagram of broadband of the present invention restructural laod network.
Fig. 2: broadband of the present invention restructural laod network changes the equivalent capacitance value of DCCA to Z
LoadInfluence.
Fig. 3: broadband of the present invention restructural laod network changes DCRA and cooperates DCCA to realize that the gain at low frequency place improves effect.
Fig. 4: broadband of the present invention restructural laod network changes DCRA and cooperates DCCA to realize that the gain of high frequency treatment improves effect.
Embodiment
Combine accompanying drawing to further describe the present invention through embodiment below.
As shown in Figure 1, through the selection to switching voltage, said laod network can change equivalent impedance Z in 1.8 ~ 10.6GHz frequency range
Load,, can realize the restructural of variable gain bandwidth varying to satisfy the requirement of each communication standard.
What should explain at last is; Below only unrestricted in order to technical scheme of the present invention to be described; Those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the claim scope of the present invention.
Claims (3)
1. broadband restructural laod network is characterized in that:
Form by inductance, voltage control capacitor array and voltage control electric resistance array, said voltage control capacitor array and the parallelly connected formation of said inductance LC series resonant network, this resonant network is connected with said voltage control electric resistance array in order, constitutes the RLC laod network; Through voltage control capacitor array switch, the adjustment resonance frequency; Through the switch of voltage control electric resistance array, the gain under the adjustment different frequency range.
2. broadband as claimed in claim 1 restructural laod network; It is characterized in that; Said voltage control capacitor array is made up of the parallel connection of multiple row capacitor array, and wherein, each column capacitance array is connected capacitor C b more in order and constituted by capacitor C a connection switch SW cap, switch SW.
3. broadband as claimed in claim 1 restructural laod network is characterized in that said voltage control electric resistance array is made up of the parallel connection of multiple row electric resistance array, and wherein, each row electric resistance array connects resistance R by switch SW res and constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102063834A CN102386874A (en) | 2011-07-22 | 2011-07-22 | Wideband reconfigurable load network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102063834A CN102386874A (en) | 2011-07-22 | 2011-07-22 | Wideband reconfigurable load network |
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| CN102386874A true CN102386874A (en) | 2012-03-21 |
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| CN2011102063834A Pending CN102386874A (en) | 2011-07-22 | 2011-07-22 | Wideband reconfigurable load network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459393A (en) * | 2014-12-05 | 2015-03-25 | 国家电网公司 | Large-capacity adjustable simulation RLC test load |
| CN110719074A (en) * | 2019-09-23 | 2020-01-21 | 成都航天科工微电子系统研究院有限公司 | Tunable broadband low-noise amplifier |
| CN111416586A (en) * | 2020-04-03 | 2020-07-14 | 杭州易百德微电子有限公司 | Load structure and radio frequency amplifier formed by same |
Citations (5)
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| CN101496287A (en) * | 2006-06-15 | 2009-07-29 | 比特沃半导体公司 | Continuous gain compensation and fast band selection in a multi-standard, multi-frequencey synthesizer |
| CN101753159A (en) * | 2010-01-11 | 2010-06-23 | 清华大学 | RF (radio frequency) receiving front end with diversified gaining modes and capable of automatic tuning |
| CN101834576A (en) * | 2010-04-08 | 2010-09-15 | 复旦大学 | Multimode tunable CMOS (Complementary Metal Oxide Semiconductor) differential low noise amplifier |
| US20100290368A1 (en) * | 2009-05-14 | 2010-11-18 | Texas Instruments Deutschland Gmbh | Half-duplex rfid transponder and a method of operating a half-duplex rfid transponder |
| CN102006095A (en) * | 2010-10-21 | 2011-04-06 | 华东师范大学 | Automatic frequency calibration channel selection filter for multi-frequency multi-mode wireless transceiver |
-
2011
- 2011-07-22 CN CN2011102063834A patent/CN102386874A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496287A (en) * | 2006-06-15 | 2009-07-29 | 比特沃半导体公司 | Continuous gain compensation and fast band selection in a multi-standard, multi-frequencey synthesizer |
| US20100290368A1 (en) * | 2009-05-14 | 2010-11-18 | Texas Instruments Deutschland Gmbh | Half-duplex rfid transponder and a method of operating a half-duplex rfid transponder |
| CN101753159A (en) * | 2010-01-11 | 2010-06-23 | 清华大学 | RF (radio frequency) receiving front end with diversified gaining modes and capable of automatic tuning |
| CN101834576A (en) * | 2010-04-08 | 2010-09-15 | 复旦大学 | Multimode tunable CMOS (Complementary Metal Oxide Semiconductor) differential low noise amplifier |
| CN102006095A (en) * | 2010-10-21 | 2011-04-06 | 华东师范大学 | Automatic frequency calibration channel selection filter for multi-frequency multi-mode wireless transceiver |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459393A (en) * | 2014-12-05 | 2015-03-25 | 国家电网公司 | Large-capacity adjustable simulation RLC test load |
| CN110719074A (en) * | 2019-09-23 | 2020-01-21 | 成都航天科工微电子系统研究院有限公司 | Tunable broadband low-noise amplifier |
| CN110719074B (en) * | 2019-09-23 | 2023-06-20 | 航天科工微电子系统研究院有限公司 | Tunable broadband low noise amplifier |
| CN111416586A (en) * | 2020-04-03 | 2020-07-14 | 杭州易百德微电子有限公司 | Load structure and radio frequency amplifier formed by same |
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Application publication date: 20120321 |