CN103117762A - Double-channel receiving front-end circuit - Google Patents
Double-channel receiving front-end circuit Download PDFInfo
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- CN103117762A CN103117762A CN2012105971385A CN201210597138A CN103117762A CN 103117762 A CN103117762 A CN 103117762A CN 2012105971385 A CN2012105971385 A CN 2012105971385A CN 201210597138 A CN201210597138 A CN 201210597138A CN 103117762 A CN103117762 A CN 103117762A
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Abstract
The invention provides a double-channel receiving front-end circuit. The double-channel receiving front-end circuit comprises a local oscillator, a power divider, a first channel, a first mixer, a first intermediate-frequency filter, an intermediate frequency amplifier, a second channel, a second mixer, a second intermediate-frequency filter and a second intermediate frequency amplifier, wherein the power divider is connected with the local oscillator, the first channel comprises a first low noise amplifier which receives radio-frequency input signals, the mixer is connected to the first low noise amplifier and the power divider, the first intermediate-frequency filter is connected to the first mixer, the intermediate frequency amplifier is connected to the first intermediate-frequency filter and provides a first receiver output signal, the second channel comprises a second low noise amplifier and receives radio-frequency input signals, the second mixer is connected to the second low noise amplifier and the power divider, the second intermediate-frequency filter is connected to the second mixer, and the second intermediate frequency amplifier is connected to the second intermediate-frequency filter and provides a second receiver output signal. The double-channel receiving front-end circuit can be applied to multiple application occasions.
Description
Technical field
The present invention relates to RF application, particularly a kind of dual channel receiver front-end circuit.
Background technology
Receiver is the important component part of communication system, and its effect is the radiofrequency signal that receiver/transmitter sends, and delivers to rear class after this radiofrequency signal is processed and carries out demodulation, decoding etc., restores baseband signal and gives user terminal.In some application scenario, the radiofrequency signal that receives need to be divided into the identical or different output of two-way, at this moment, need the dual channel receiver front end.
Summary of the invention
The present invention proposes a kind of dual channel receiver front-end circuit, solved the problem that some application scenario needs identical or different two paths of signals.
Technical scheme of the present invention is achieved in that
A kind of dual channel receiver front-end circuit comprises local vibration source, and described local vibration source provides local oscillation signal; Power splitter, described power splitter are connected to described local vibration source with the reception local oscillation signal, and described power splitter output the first local oscillation signal and the second local oscillation signal; First passage, described first passage comprises the first low noise amplifier, the input received RF input signal of described the first low noise amplifier; The first frequency mixer, an input of described the first frequency mixer is connected to the output of described the first low noise amplifier, and another input of described the first frequency mixer is connected to the output of described power splitter; The first intermediate-frequency filter, the input of described the first intermediate-frequency filter is connected to the output of described the first frequency mixer; And first intermediate frequency amplifier, the input of described the first intermediate frequency amplifier is connected to the output of described the first intermediate-frequency filter, and the output of described the first intermediate frequency amplifier provides the first receiver output signal; And second channel, described second channel comprises the second low noise amplifier, the input of described the second low noise amplifier receives described radio-frequency input signals; The second frequency mixer, an input of described the second frequency mixer is connected to the output of described the second low noise amplifier, and another input of described the second frequency mixer is connected to the output of described power splitter; The second intermediate-frequency filter, the input of described the second intermediate-frequency filter is connected to the output of described the second frequency mixer; And second intermediate frequency amplifier, the input of described the second intermediate frequency amplifier is connected to the output of described the second intermediate-frequency filter, and the output of described the second intermediate frequency amplifier provides the second receiver output signal.
Alternatively, described first passage also comprises the first prefilter, and described the first prefilter is connected between described the first low noise amplifier and described the first frequency mixer; Described second channel also comprises the second prefilter, and described the second prefilter is connected between described the second low noise amplifier and described the second frequency mixer.
Alternatively, described first passage also comprises the first preamplifier, and described the first preamplifier is connected between described power splitter and described the first frequency mixer; Described second channel also comprises the second preamplifier, and described the second preamplifier is connected between described power splitter and described the second frequency mixer.
The invention has the beneficial effects as follows the dual channel receiver front-end circuit that utilizes the present invention to propose, the radiofrequency signal that receives can be divided into two-way, and divide the two-way output signal can be identical, also can have different frequencies or power.Therefore, this dual channel receiver front-end circuit can be applicable to various application occasions.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of dual channel receiver front-end circuit signal Figure 10 according to one embodiment of the invention;
Fig. 2 is a kind of improved dual channel receiver front-end circuit signal Figure 20 according to one embodiment of the invention;
Fig. 3 is a kind of improved dual channel receiver front-end circuit signal Figure 30 according to one embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is a kind of dual channel receiver front-end circuit signal Figure 10 according to one embodiment of the invention.As shown in Figure 1, dual channel receiver front-end circuit 10 comprises passage A1, passage A2, and local vibration source LO is with power splitter DIV.Wherein, local vibration source LO provides local oscillation signal to power splitter DIV, and local oscillation signal is divided into two-way LO1 to power splitter DIV and LO2 provides respectively to passage A1 and passage A2.
Passage A1 comprises low noise amplifier LNA1, low noise amplifier LNA1 received RF input signal RF, and export the first low noise amplification signal.The input of frequency mixer M1 is connected to the output of low noise amplifier LNA1, and its another input is connected to power splitter DIV to receive local oscillation signal LO1, its output output first mixed frequency signal.The input of intermediate-frequency filter F1 is connected to the output of frequency mixer M1 to receive the first mixed frequency signal, its output output first intermediate frequency filtering signal.The input of intermediate frequency amplifier AMP1 is connected to the output of intermediate-frequency filter F1 to receive the first intermediate frequency filtering signal, and its output provides receiver output signal SOUT1.
Similarly, passage A2 comprises low noise amplifier LNA2, low noise amplifier LNA2 received RF input signal RF, and export the second low noise amplification signal.The input of frequency mixer M2 is connected to the output of low noise amplifier LNA2, and its another input is connected to power splitter DIV to receive local oscillation signal LO2, its output output second mixed frequency signal.The input of intermediate-frequency filter F2 is connected to the output of frequency mixer M2 to receive the second mixed frequency signal, its output output second intermediate frequency filtering signal.The input of intermediate frequency amplifier AMP2 is connected to the output of intermediate-frequency filter F2 to receive the second intermediate frequency filtering signal, and its output provides receiver output signal SOUT2.
Fig. 2 is a kind of improved dual channel receiver front-end circuit signal Figure 20 according to one embodiment of the invention.As shown in Figure 2, compare with dual channel receiver front-end circuit 10 shown in Figure 1, dual channel receiver front-end circuit 20 shown in Figure 2 also comprises prefilter FF1 and FF2.Wherein, between low noise amplifier LNA1 and frequency mixer M1, it receives the first low noise amplification signal of low noise amplifier LNA1 output to prefilter FF1, and exports the first pre-filtering signal in passage A1.Between low noise amplifier LNA2 and frequency mixer M2, it receives the second low noise amplification signal of low noise amplifier LNA2 output to prefilter FF2, and exports the second pre-filtering signal in passage A2.By placing prefilter in the dual channel receiver front-end circuit, the image signal of the radiofrequency signal RF that can filtering receives, thus can avoid mirror image to disturb.
Fig. 3 is a kind of improved dual channel receiver front-end circuit signal Figure 30 according to one embodiment of the invention.As shown in Figure 3, compare with dual channel receiver front-end circuit 10 shown in Figure 1, dual channel receiver front-end circuit 30 shown in Figure 3 also comprises preamplifier AMP1 ' and AMP2 '.Wherein, between the frequency mixer M1 and power splitter DIV of preamplifier AMP1 ' in passage A1, it receives the first local oscillation signal LO1 of power splitter DIV output, and exports the first preamplification signal.Between the frequency mixer M2 and power splitter DIV of preamplifier AMP2 ' in passage A2, it receives the second local oscillation signal LO2 of power splitter DIV output, and exports the second preamplification signal.By place preamplifier in the dual channel receiver front-end circuit, further amplifying signal power, make whole channel gain improve.
The dual channel receiver front-end circuit that utilizes the present invention to propose can be divided into two-way with the radiofrequency signal that receives, and divide the two-way output signal can be identical, also can have different frequencies or power.Therefore, this dual channel receiver front-end circuit can be applicable to various application occasions.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a dual channel receiver front-end circuit, is characterized in that, comprising:
Local vibration source, described local vibration source provides local oscillation signal;
Power splitter, described power splitter are connected to described local vibration source with the reception local oscillation signal, and described power splitter output the first local oscillation signal and the second local oscillation signal;
First passage, described first passage comprises:
The first low noise amplifier, the input received RF input signal of described the first low noise amplifier;
The first frequency mixer, an input of described the first frequency mixer is connected to the output of described the first low noise amplifier, and another input of described the first frequency mixer is connected to the output of described power splitter;
The first intermediate-frequency filter, the input of described the first intermediate-frequency filter is connected to the output of described the first frequency mixer; And
The first intermediate frequency amplifier, the input of described the first intermediate frequency amplifier is connected to the output of described the first intermediate-frequency filter, and the output of described the first intermediate frequency amplifier provides the first receiver output signal; And
Second channel, described second channel comprises:
The second low noise amplifier, the input of described the second low noise amplifier receives described radio-frequency input signals;
The second frequency mixer, an input of described the second frequency mixer is connected to the output of described the second low noise amplifier, and another input of described the second frequency mixer is connected to the output of described power splitter;
The second intermediate-frequency filter, the input of described the second intermediate-frequency filter is connected to the output of described the second frequency mixer; And
The second intermediate frequency amplifier, the input of described the second intermediate frequency amplifier is connected to the output of described the second intermediate-frequency filter, and the output of described the second intermediate frequency amplifier provides the second receiver output signal.
2. dual channel receiver front-end circuit as claimed in claim 1, is characterized in that, described first passage also comprises the first prefilter, and described the first prefilter is connected between described the first low noise amplifier and described the first frequency mixer; Described second channel also comprises the second prefilter, and described the second prefilter is connected between described the second low noise amplifier and described the second frequency mixer.
3. dual channel receiver front-end circuit as claimed in claim 1, is characterized in that, described first passage also comprises the first preamplifier, and described the first preamplifier is connected between described power splitter and described the first frequency mixer; Described second channel also comprises the second preamplifier, and described the second preamplifier is connected between described power splitter and described the second frequency mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105971385A CN103117762A (en) | 2012-12-17 | 2012-12-17 | Double-channel receiving front-end circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105971385A CN103117762A (en) | 2012-12-17 | 2012-12-17 | Double-channel receiving front-end circuit |
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| CN103117762A true CN103117762A (en) | 2013-05-22 |
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| CN2012105971385A Pending CN103117762A (en) | 2012-12-17 | 2012-12-17 | Double-channel receiving front-end circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911134A (en) * | 2017-06-21 | 2018-04-13 | 天津光电通信技术有限公司 | The plate card type receiver that a kind of set AIS and ACARS signals are received |
| CN109217886A (en) * | 2018-08-21 | 2019-01-15 | 北京无线电测量研究所 | A kind of two-way down conversion components |
| CN113098538A (en) * | 2021-03-04 | 2021-07-09 | 河北晶禾电子技术股份有限公司 | Device for power supply time sequence abnormity and control method thereof |
-
2012
- 2012-12-17 CN CN2012105971385A patent/CN103117762A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911134A (en) * | 2017-06-21 | 2018-04-13 | 天津光电通信技术有限公司 | The plate card type receiver that a kind of set AIS and ACARS signals are received |
| CN109217886A (en) * | 2018-08-21 | 2019-01-15 | 北京无线电测量研究所 | A kind of two-way down conversion components |
| CN113098538A (en) * | 2021-03-04 | 2021-07-09 | 河北晶禾电子技术股份有限公司 | Device for power supply time sequence abnormity and control method thereof |
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Application publication date: 20130522 |