CN104426564A - Multi-mode receiver radio frequency front-end system and signal receiving method thereof - Google Patents

Multi-mode receiver radio frequency front-end system and signal receiving method thereof Download PDF

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CN104426564A
CN104426564A CN201310385382.XA CN201310385382A CN104426564A CN 104426564 A CN104426564 A CN 104426564A CN 201310385382 A CN201310385382 A CN 201310385382A CN 104426564 A CN104426564 A CN 104426564A
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low
noise amplifier
low noise
frequency
high band
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CN104426564B (en
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李海松
崔福良
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Leadcore Technology Co Ltd
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Leadcore Technology Co Ltd
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Abstract

The invention provides a multi-mode receiver radio frequency front-end system and a signal receiving method thereof. The method comprises the steps that a low-noise amplifier works at a high frequency band, and load inductance of the low-noise amplifier is set as L1, wherein L1 is a natural number; and the low-noise amplifier works at a low frequency band, and load inductance of the low-noise amplifier is set as L1+L2, wherein L2 is the natural number. Load inductance is reused when the multi-mode receiver radio frequency front-end low-noise amplifier works at high frequency and low frequency so that chip area is reduced and thus an objective of cost reduction is achieved.

Description

A kind of multimode rake receiver radio-frequency front-end system and signal acceptance method thereof
Technical field
The present invention relates to 3G wireless communication technology field, particularly a kind of multimode rake receiver radio-frequency front-end system and signal acceptance method thereof.
Background technology
Along with society and the progress of technology, increasing wireless application is developed, and all kinds of new wireless standard is also constantly released.Multi-mode radio frequency receiver is the study hotspot of academia and industrial quarters in recent years, can be realized the compatibility of multiple kinds by single receiver link.
In the prior art, multi-mode radio frequency receiver front end adopts separation low noise amplifier (LNA) to realize multi-mode-multi-band (WCDMA/FDD-LTE).
Low noise amplifier is the amplifier that noise factor is very low.General high frequency or the intermediate-frequency preamplifier (WiFi inside such as mobile phone, computer or iPAD) being used as all kinds of radio receiver, and the amplifying circuit of high sensitivity electron detection equipment.Because the process after all is all carry out, so a low noise amplifier is vital based on the signal after LNA amplifies.
As shown in Figure 1, in the scheme of prior art, when high and low frequency works, low noise amplifier realizes multi-mode-multi-band respectively, can use more inductance, that is occupies larger chip area.
Summary of the invention
The object of the present invention is to provide a kind of multimode rake receiver radio-frequency front-end system and signal acceptance method thereof, excessive to solve existing multimode rake receiver radio frequency front end chip area, cause the problem of high cost.
For solving the problems of the technologies described above, the invention provides a kind of multimode rake receiver radio-frequency front-end signal acceptance method, comprising:
Described low noise amplifier load inductance, in high band operation, is set to L1 by low noise amplifier, and wherein, L1 is natural number;
Described low noise amplifier load inductance, in low-frequency range work, is set to L1+L2 by low noise amplifier, and wherein, L2 is natural number.
Further, in described multimode rake receiver radio-frequency front-end signal acceptance method, described low noise amplifier load inductance adopts LC frequency-selective network as load.
Further, in described multimode rake receiver radio-frequency front-end signal acceptance method,
As PD_H=0, the low noise amplifier work of high band operation, as PD_H=1, the low noise amplifier of high band operation turns off, wherein, PD_H=0 represents that the low noise amplifier control signal of high band operation is low-voltage, and PD_H=1 represents that the low noise amplifier control signal of high band operation is high voltage;
As PD_L=0, the low noise amplifier work of low-frequency range work, as PD_L=1, the low noise amplifier of low-frequency range work turns off, wherein, PD_L=0 represents that the low noise amplifier control signal of low-frequency range work is low-voltage, and PD_H=1 represents that the low noise amplifier control signal of low-frequency range work is high voltage.
Further, in described multimode rake receiver radio-frequency front-end signal acceptance method, according to low noise amplifier in high band operation frequency, obtain the load inductance of low noise amplifier when high band operation,
wherein, f highrepresent high band operation frequency, ∏ represents circumference ratio, L 1represent the load inductance of low noise amplifier when high band operation, C lrepresent the load capacitance of low noise amplifier when high band operation.
Further, in described multimode rake receiver radio-frequency front-end signal acceptance method, according to low noise amplifier in low-frequency range operating frequency, obtain the load inductance of low noise amplifier when low-frequency range works,
wherein, f lowrepresent low-frequency range operating frequency, ∏ represents circumference ratio, L 1+ L 2represent the load inductance of low noise amplifier when low-frequency range works, C lrepresent the load capacitance of low noise amplifier when high band operation.
Further, in described multimode rake receiver radio-frequency front-end signal acceptance method, load inductance L 1with load inductance L 1+ L 2, under the high band preset and the low-frequency range of presetting, there is the proportionate relationship preset.
Meanwhile, the present invention also provides a kind of multimode rake receiver radio-frequency front-end system, comprising:
When low noise amplifier is in high band operation, described low noise amplifier load inductance is set to L1, and wherein, L1 is natural number;
When low noise amplifier works in low-frequency range, described low noise amplifier load inductance is set to L1+L2, and wherein, L2 is natural number.
Further, in described multimode rake receiver radio-frequency front-end system, described low noise amplifier load inductance adopts LC frequency-selective network as load.
Further, in described multimode rake receiver radio-frequency front-end system,
As PD_H=0, high-frequency low-noise acoustic amplifier is operating state, as PD_H=1, high-frequency low-noise acoustic amplifier is off state, wherein, PD_H=0 represents that high-frequency low noise amplifier control signal is low-voltage, and PD_H=1 represents that high-frequency low noise amplifier control signal is high voltage;
As PD_L=0, Low Noise and Low Frequency Amplifier is operating state, as PD_L=1, Low Noise and Low Frequency Amplifier is off state, wherein, PD_L=0 represents that Low Noise and Low Frequency Amplifier control signal is low-voltage, and PD_H=1 represents that Low Noise and Low Frequency Amplifier control signal is high voltage.
Further, in described multimode rake receiver radio-frequency front-end system, load inductance L 1with load inductance L 1+ L 2, under the high band preset and the low-frequency range of presetting, there is the proportionate relationship preset.
A kind of multimode rake receiver radio-frequency front-end system provided by the invention and signal acceptance method thereof, there is following beneficial effect: the present invention by the low noise amplifier of multimode rake receiver radio-frequency front-end when low-and high-frequency works, load inductance is multiplexing, reach chip area to lower, thus the object reduced costs.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art multimode rake receiver radio-frequency front-end;
Fig. 2 is the schematic diagram in high band operation in multimode rake receiver radio-frequency front-end signal acceptance method of the present invention;
Fig. 3 is the schematic diagram in low-frequency range work in multimode rake receiver radio-frequency front-end signal acceptance method of the present invention;
Fig. 4 is the circuit model figure of the multimode rake receiver radio-frequency front-end signal acceptance method of the embodiment of the present invention 1;
Fig. 5 is the domain model of the multimode rake receiver radio-frequency front-end signal acceptance method of the embodiment of the present invention 1.
Embodiment
A kind of multimode rake receiver radio-frequency front-end system proposed the present invention below in conjunction with the drawings and specific embodiments and signal acceptance method thereof are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.
As shown in Figures 2 and 3, the invention provides a kind of multimode rake receiver radio-frequency front-end signal acceptance method, comprising:
Step one: described low noise amplifier load inductance, in high band operation, is set to L1 by low noise amplifier, wherein, L1 is natural number;
Step 2: described low noise amplifier load inductance, in low-frequency range work, is set to L1+L2 by low noise amplifier, wherein, L2 is natural number.
Concrete, in the present invention, described low noise amplifier load inductance adopts LC frequency-selective network as load.
Concrete, as PD_H=0, the low noise amplifier work of high band operation, as PD_H=1, the low noise amplifier of high band operation turns off, wherein, PD_H=0 represents that the low noise amplifier control signal of high band operation is low-voltage, and PD_H=1 represents that the low noise amplifier control signal of high band operation is high voltage;
As PD_L=0, the low noise amplifier work of low-frequency range work, as PD_L=1, the low noise amplifier of low-frequency range work turns off, wherein, PD_L=0 represents that the low noise amplifier control signal of low-frequency range work is low-voltage, and PD_H=1 represents that the low noise amplifier control signal of low-frequency range work is high voltage.
As shown in Fig. 4 and Tu, in multimode rake receiver radio-frequency front-end method of reseptance of the present invention, according to low noise amplifier in high band operation frequency, obtain the load inductance of low noise amplifier when high band operation,
wherein, f highrepresent high band operation frequency, ∏ represents circumference ratio, L 1represent the load inductance of low noise amplifier when high band operation, C lrepresent the load capacitance of low noise amplifier when high band operation.
According to low noise amplifier in low-frequency range operating frequency, obtain the load inductance of low noise amplifier when low-frequency range works,
wherein, f lowrepresent low-frequency range operating frequency, ∏ represents circumference ratio, L 1+ L 2represent the load inductance of low noise amplifier when low-frequency range works, C lrepresent the load capacitance of low noise amplifier when high band operation.
Load inductance L 1with load inductance L 1+ L 2, under the high band preset and the low-frequency range of presetting, there is the proportionate relationship preset.
[embodiment 1]
If high-band frequency is 1.9G in 1.8G-2GHz(centre frequency), low-frequency range frequency is 0.8G in 700M-900MHz(centre frequency).
f high = 1 2 Π L 1 × C L f low = 1 2 Π ( L 1 + L 2 ) × C L
f high f low = L 1 + L 2 L 1 = 1.9 0.8 = 2.375
L 2＝4.64L 1
As can be seen here, the embodiment of the present invention only need design the slow then L of inductance value 2=4.64L 1.By the low noise amplifier of multimode rake receiver radio-frequency front-end when low-and high-frequency works, load inductance is multiplexing, reaches chip area and lowers, thus the object reduced costs.
Meanwhile, the present invention also provides a kind of multimode rake receiver radio-frequency front-end system, comprising:
When low noise amplifier is in high band operation, described low noise amplifier load inductance is set to L1, and wherein, L1 is natural number;
When low noise amplifier works in low-frequency range, described low noise amplifier load inductance is set to L1+L2, and wherein, L2 is natural number.
Concrete, in the present invention, described low noise amplifier load inductance adopts LC frequency-selective network as load.
Concrete, as PD_H=0, high-frequency low-noise acoustic amplifier is operating state, as PD_H=1, high-frequency low-noise acoustic amplifier is off state, wherein, PD_H=0 represents that high-frequency low noise amplifier control signal is low-voltage, and PD_H=1 represents that high-frequency low noise amplifier control signal is high voltage;
As PD_L=0, Low Noise and Low Frequency Amplifier is operating state, as PD_L=1, Low Noise and Low Frequency Amplifier is off state, wherein, PD_L=0 represents that Low Noise and Low Frequency Amplifier control signal is low-voltage, and PD_H=1 represents that Low Noise and Low Frequency Amplifier control signal is high voltage.
Especially, in the present invention, load inductance L 1with load inductance L 1+ L 2, under the high band preset and the low-frequency range of presetting, there is the proportionate relationship preset.
Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, and any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, modification, all belong to the protection range of claims.

Claims (10)

1. a multimode rake receiver radio-frequency front-end signal acceptance method, is characterized in that, comprising:
Described low noise amplifier load inductance, in high band operation, is set to L1 by low noise amplifier, and wherein, L1 is natural number;
Described low noise amplifier load inductance, in low-frequency range work, is set to L1+L2 by low noise amplifier, and wherein, L2 is natural number.
2. multimode rake receiver radio-frequency front-end signal acceptance method as claimed in claim 1, is characterized in that, described low noise amplifier load inductance adopts LC frequency-selective network as load.
3. multimode rake receiver radio-frequency front-end signal acceptance method as claimed in claim 1, is characterized in that,
As PD_H=0, the low noise amplifier work of high band operation, as PD_H=1, the low noise amplifier of high band operation turns off, wherein, PD_H=0 represents that the low noise amplifier control signal of high band operation is low-voltage, and PD_H=1 represents that the low noise amplifier control signal of high band operation is high voltage;
As PD_L=0, the low noise amplifier work of low-frequency range work, as PD_L=1, the low noise amplifier of low-frequency range work turns off, wherein, PD_L=0 represents that the low noise amplifier control signal of low-frequency range work is low-voltage, and PD_H=1 represents that the low noise amplifier control signal of low-frequency range work is high voltage.
4. multimode rake receiver radio-frequency front-end signal acceptance method as claimed in claim 1, is characterized in that, according to low noise amplifier in high band operation frequency, obtains the load inductance of low noise amplifier when high band operation,
wherein, f highrepresent high band operation frequency, ∏ represents circumference ratio, L 1represent the load inductance of low noise amplifier when high band operation, C lrepresent the load capacitance of low noise amplifier when high band operation.
5. multimode rake receiver radio-frequency front-end signal acceptance method as claimed in claim 4, is characterized in that, according to low noise amplifier in low-frequency range operating frequency, obtains the load inductance of low noise amplifier when low-frequency range works,
wherein, f lowrepresent low-frequency range operating frequency, ∏ represents circumference ratio, L 1+ L 2represent the load inductance of low noise amplifier when low-frequency range works, C lrepresent the load capacitance of low noise amplifier when high band operation.
6. multimode rake receiver radio-frequency front-end signal acceptance method as claimed in claim 5, is characterized in that, load inductance L 1with load inductance L 1+ L 2, under the high band preset and the low-frequency range of presetting, there is the proportionate relationship preset.
7. a multimode rake receiver radio-frequency front-end system, is characterized in that, comprising:
When low noise amplifier is in high band operation, described low noise amplifier load inductance is set to L1, and wherein, L1 is natural number;
When low noise amplifier works in low-frequency range, described low noise amplifier load inductance is set to L1+L2, and wherein, L2 is natural number.
8. multimode rake receiver radio-frequency front-end system as claimed in claim 7, is characterized in that, described low noise amplifier load inductance adopts LC frequency-selective network as load.
9. multimode rake receiver radio-frequency front-end system as claimed in claim 7, is characterized in that,
As PD_H=0, high-frequency low-noise acoustic amplifier is operating state, as PD_H=1, high-frequency low-noise acoustic amplifier is off state, wherein, PD_H=0 represents that high-frequency low noise amplifier control signal is low-voltage, and PD_H=1 represents that high-frequency low noise amplifier control signal is high voltage;
As PD_L=0, Low Noise and Low Frequency Amplifier is operating state, as PD_L=1, Low Noise and Low Frequency Amplifier is off state, wherein, PD_L=0 represents that Low Noise and Low Frequency Amplifier control signal is low-voltage, and PD_H=1 represents that Low Noise and Low Frequency Amplifier control signal is high voltage.
10. multimode rake receiver radio-frequency front-end system as claimed in claim 7, is characterized in that, load inductance L 1with load inductance L 1+ L 2, under the high band preset and the low-frequency range of presetting, there is the proportionate relationship preset.
CN201310385382.XA 2013-08-29 2013-08-29 A kind of multimode rake receiver radio-frequency front-end system and its signal acceptance method Active CN104426564B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5872489A (en) * 1997-04-28 1999-02-16 Rockwell Science Center, Llc Integrated tunable inductance network and method
US20050184828A1 (en) * 2004-02-21 2005-08-25 Samsung Electronics Co., Ltd. Tunable wideband bandpass filter, tunable multi-band wideband bandpass filter using the same, and methods therefore
CN101902243A (en) * 2010-07-28 2010-12-01 锐迪科创微电子（北京）有限公司 Configurable multimode radio-frequency front end module and mobile terminal having same
CN102055491A (en) * 2010-04-14 2011-05-11 锐迪科创微电子（北京）有限公司 Radio frequency front-end module and mobile communication device provided with same
CN102938657A (en) * 2012-11-13 2013-02-20 贵州中科汉天下电子有限公司 Radio frequency front end device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5872489A (en) * 1997-04-28 1999-02-16 Rockwell Science Center, Llc Integrated tunable inductance network and method
US20050184828A1 (en) * 2004-02-21 2005-08-25 Samsung Electronics Co., Ltd. Tunable wideband bandpass filter, tunable multi-band wideband bandpass filter using the same, and methods therefore
CN102055491A (en) * 2010-04-14 2011-05-11 锐迪科创微电子（北京）有限公司 Radio frequency front-end module and mobile communication device provided with same
CN101902243A (en) * 2010-07-28 2010-12-01 锐迪科创微电子（北京）有限公司 Configurable multimode radio-frequency front end module and mobile terminal having same
CN102938657A (en) * 2012-11-13 2013-02-20 贵州中科汉天下电子有限公司 Radio frequency front end device

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