CN203930070U - The radio system of low noise amplifier and GNSS system receiver front end - Google Patents
The radio system of low noise amplifier and GNSS system receiver front end Download PDFInfo
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- CN203930070U CN203930070U CN201420288543.3U CN201420288543U CN203930070U CN 203930070 U CN203930070 U CN 203930070U CN 201420288543 U CN201420288543 U CN 201420288543U CN 203930070 U CN203930070 U CN 203930070U
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Abstract
The utility model relates to a kind of low noise amplifier, comprise filtration module, Signal Matching module, amplification module, disturb and suppress module and output frequency-selecting module, filtration module output terminal connects Signal Matching module input, Signal Matching module output terminal connects amplification module input end, amplification module output terminal connects interference and suppresses module input, amplification module output terminal connects output frequency-selecting module input, output frequency-selecting module output terminal output signal, disturb inhibition module to carry out impedance matching for useful signal and reduce reflection loss, undesired signal is presented to high impedance decay to be suppressed, by frequency-selecting module settling signal, export.This low noise amplifier chip area simple in structure, functional, low in energy consumption, whole is little, realizes radio-frequency front-end plate level without SAW wave filter, reduces system applies cost, improves the market competitiveness.
Description
Technical field
The utility model belongs to integrated circuit fields, relates in particular to a kind of have low noise amplifier and the outer radio system of disturbing the GNSS system receiver front end suppressing of band.
Background technology
Current GNSS wireless communications products, substantially all adopt plate level SAW wave filter, other communication systems of filtering are launched by force interference, as the transmitting/receivings such as GSM/WCDMA/LTE are disturbed, but the price of SAW wave filter is high, and area occupied is large, BOM price is high, if can realize GSM transmitting/receiving at chip internal, disturb inhibition, just can realize radio-frequency front-end plate level without SAW filter system scheme.Employing SAW filter power consumption is high, chip performance is low, chip area is large.
Utility model content
For above-mentioned shortcoming, the purpose of this utility model is to provide a kind of cancellation in GNSS wireless communication system to use expensive SAW wave filter, reduce chip area and power consumption, improve chip performance, design a kind of carrying and disturb inhibition low noise amplifier and frequency mixer, trans-impedance amplifier to realize radio-frequency front-end plate level without SAW filter system.
The utility model is to realize like this, a kind of low noise amplifier, this amplifier comprises filtration module, Signal Matching module, amplification module, disturb and suppress module and output frequency-selecting module, described filtration module output terminal connects described Signal Matching module input, described Signal Matching module output terminal connects described amplification module input end, described amplification module output terminal connects described interference and suppresses module input, described amplification module output terminal connects described output frequency-selecting module input, described output frequency-selecting module output terminal output signal, described interference suppresses module and carries out impedance matching minimizing reflection loss for useful signal, undesired signal is presented to high impedance to be suppressed, by output frequency-selecting module settling signal, export.
Further technical scheme of the present utility model is: described interference suppresses module and comprises inductance L s1, inductance L s2, capacitor C m and constant current source, one end of described inductance L s1 connects respectively one end of described inductance L s2 and the input end of constant current source, the other end of described inductance L s2 connects one end of described capacitor C m, described constant current source output head grounding, described capacitor C m other end ground connection.
Further technical scheme of the present utility model is: described filtration module comprises inductance L 1 and capacitor C 1, and described inductance L 1 one end connects described capacitor C 1 one end, described capacitor C 1 other end ground connection.
Further technical scheme of the present utility model is: described interference suppresses module and comprises inductance L s1, equivalent reactance X2 and constant current source, described inductance L s1 one end connects described equivalent reactance X2 one end, described equivalent reactance X2 other end ground connection, described inductance L s1 one end connects described Constant current input end, described constant current source output head grounding.
Further technical scheme of the present utility model is: described filtration module comprises equivalent reactance X1, and described equivalent reactance X1 one end connects input signal, described equivalent reactance X1 other end ground connection.
Further technical scheme of the present utility model is: described Signal Matching module comprises inductance L g and capacitor C gs, and described inductance L g one end connects capacitor C gs one end, and the described capacitor C gs other end connects the other end of described inductance L s1; Amplification module comprises N-MOS pipe M1 and N-MOS pipe M2, described N-MOS pipe M1 grid connects one end of described inductance L g, the source electrode of described N-MOS pipe M1 connects the other end of described inductance L s1, the drain electrode of described N-MOS pipe M1 connects the source electrode of described N-MOS pipe M2, and the grid of described N-MOS pipe M2 connects Vdd; Described frequency-selecting module comprises inductance L 2 and tunable capacitor C2, and described inductance L 2 is connected Vdd with one end after described tunable capacitor C2 parallel connection, and described inductance L 2 is connected drain electrode the output signal of described N-MOS pipe M2 with the other end after described tunable capacitor C2 parallel connection.
Another object of the present utility model is to provide a kind of radio system of GNSS system receiver front end, this radio system comprises the low noise amplifier having described in claim 1-6 any one, receiving antenna, input matching network, orthogonal mixer and trans-impedance amplifier, described receiving antenna output terminal connects described input matching network input end, described input matching network output terminal connects described low noise amplifier input end, described low noise amplifier output terminal connects described orthogonal mixer input end, described orthogonal mixer output terminal connects described trans-impedance amplifier input end, described trans-impedance amplifier output terminal output intermediate-freuqncy signal, described low noise amplifier reduces reflection loss for useful signal being carried out to impedance matching, undesired signal is presented to high impedance and suppress settling signal amplification output, described receiving antenna, for receiving electronic signal and output signal, described input matching network, for carrying out passage coupling to the signal of double frequency receiving antenna input different frequency, described orthogonal mixer, carries out down-converted for the radiofrequency signal that low noise amplifier was processed, described trans-impedance amplifier, for being converted into radiofrequency signal electric current output.
Further technical scheme of the present utility model is: described orthogonal mixer is two, and the input end of two described orthogonal mixers connects respectively described low noise amplifier input end.
Further technical scheme of the present utility model is: described trans-impedance amplifier is two, and described in each, trans-impedance amplifier input end is connected with a described mixer output respectively.
Further technical scheme of the present utility model is: described trans-impedance amplifier comprises amplifier A1, resistance R 3 and the capacitor C 3 of single-ended input Single-end output, in parallel to output terminal with the input end of described amplifier A1 after described resistance R 3 is in parallel with described capacitor C 3.
The beneficial effects of the utility model are: by Embedded filtering, notch filter, the useful signal of the outer input signal of sheet is carried out to impedance matching and reduce reflection loss, undesired signal is presented to high impedance and suppress, make chip volume reduce, reduce power consumption, improved the performance of chip; Simple, functional, low in energy consumption, the whole chip area of this amplifier architecture is little, realizes radio-frequency front-end plate level without SAW wave filter, reduces system cost, improves the market competitiveness.
Accompanying drawing explanation
Fig. 1 is the low noise amplifier structured flowchart that the utility model embodiment provides;
Fig. 2 is the amplifier circuit in low noise schematic diagram one that the utility model embodiment provides;
Fig. 3 is the amplifier circuit in low noise schematic diagram two that the utility model embodiment provides;
Fig. 4 is the radio system structured flowchart of the GNSS system receiver front end that provides of the utility model embodiment;
Fig. 5 is the trans-impedance amplifier circuit theory diagrams that the utility model embodiment provides.
Embodiment
Reference numeral: 10-filtration module 20-Signal Matching module 30-amplification module 40-disturbs and suppresses module 50-output frequency-selecting module 100-receiving antenna 200-input matching network 300-low noise amplifier 400-orthogonal mixer 500-trans-impedance amplifier
Fig. 1 shows the low noise amplifier 300 that the utility model provides, this amplifier comprises filtration module 10, Signal Matching module 20, amplification module 30, disturb and suppress module 40 and output frequency-selecting module 50, described filtration module 10 output terminals connect described Signal Matching module 20 input ends, described Signal Matching module 20 output terminals connect described amplification module 30 input ends, described amplification module 30 output terminals connect described interference and suppress module 40 input ends, described amplification module 30 output terminals connect described output frequency-selecting module 50 input ends, described output frequency-selecting module 50 output terminal output signals, described interference suppresses module 40 and carries out impedance matching minimizing reflection loss for useful signal, undesired signal is presented to high impedance to be suppressed, by output frequency-selecting module 50 settling signals, export.By Embedded filtering, notch filter, the useful signal of the outer input signal of sheet is carried out to impedance matching and reduce reflection loss, undesired signal is presented to high impedance and suppress, make chip volume reduce, reduce power consumption, improved the performance of chip; Simple, functional, low in energy consumption, the whole chip area of this amplifier architecture is little, realizes radio-frequency front-end plate level without SAW wave filter, reduces system cost, improves the market competitiveness.
As shown in Figure 2, described interference suppresses module 40 and comprises inductance L s1, inductance L s2, capacitor C m and constant current source, one end of described inductance L s1 connects respectively one end of described inductance L s2 and the input end of constant current source, the other end of described inductance L s2 connects one end of described capacitor C m, described constant current source output head grounding, described capacitor C m other end ground connection.
Described filtration module 10 comprises inductance L 1 and capacitor C 1, and described inductance L 1 one end connects described capacitor C 1 one end, described capacitor C 1 other end ground connection.
As shown in Figure 3, described interference suppresses module 40 and comprises inductance L s1, equivalent reactance X2 and constant current source, described inductance L s1 one end connects described equivalent reactance X2 one end, described equivalent reactance X2 other end ground connection, described inductance L s1 one end connects described Constant current input end, described constant current source output head grounding.
Described filtration module 10 comprises equivalent reactance X1, and described equivalent reactance X1 one end connects input signal, described equivalent reactance X1 other end ground connection.
As shown in Figure 2,3, described Signal Matching module 20 comprises inductance L g and capacitor C gs, and described inductance L g one end connects capacitor C gs one end, and the described capacitor C gs other end connects the other end of described inductance L s1; Amplification module 30 comprises N-MOS pipe M1 and N-MOS pipe M2, described N-MOS pipe M1 grid connects one end of described inductance L g, the source electrode of described N-MOS pipe M1 connects the other end of described inductance L s1, the drain electrode of described N-MOS pipe M1 connects the source electrode of described N-MOS pipe M2, and the grid of described N-MOS pipe M2 connects Vdd; Described frequency-selecting module 50 comprises inductance L 2 and tunable capacitor C2, and described inductance L 2 is connected Vdd with one end after described tunable capacitor C2 parallel connection, and described inductance L 2 is connected drain electrode the output signal of described N-MOS pipe M2 with the other end after described tunable capacitor C2 parallel connection.
As shown in Figure 2, for the outer circuit that disturbs the low noise amplifier 10 suppressing of GNSS (Global navigation satellite system GPS (Global Position System)) band, wherein inductance L 1, capacitor C 1 are the outer high Q value inductance of chip and electric capacity, resonance frequency is more than departing from GNSS signal 100M, as LTE (Long Term Evolution, Long Term Evolution) undesired signal (1.71GHz), to being with outer undesired signal to suppress, normally passes through GNSS inband signaling; Half Ls2 of differential inductance and Cm resonance are in GNSS frequency range.Below in different frequency of operation, circuit characteristic analysis.
At GNSS band frequency, work, L1C1 is that the outer high Q value inductance of sheet and capacitor equivalent are high reactance characteristic X1, useful signal is normally passed through, and Ls2 and Cm are equivalent to low reactance characteristic X2, as shown in Figure 3, thereby realize GNSS input impedance coupling, low noise amplifier input matching network now, is calculated as follows:
S＝jω
During Input matching,
at this low noise amplifier 300, noise is low, and the linearity is good, low in energy consumption, changes the resonance frequency of matching network by the value of Circuit tuning equivalent capacity Cgs, thereby GNSS input impedance coupling is carried out impedance matching amplification to inband signaling.
Situation outside GNSS frequency range band, L1 C1 is that the outer high Q value inductance of sheet and capacitor equivalent are low reactance characteristic, undesired signal is carried out to filtering, and Ls2 and Cm is equivalent to high reactance characteristic X2, as shown in Figure 3, thereby to being with outer interference to suppress.
X2 is source class equivalence feedback impedance, and impedance is larger, gains lower, to disturbing, effectively suppresses.
Finally, by output frequency selection network, useful signal is further amplified, to being with outer undesired signal further to suppress.
As shown in Figure 4, another object of the present utility model is to provide a kind of radio system of GNSS system receiver front end, this radio system comprises the low noise amplifier 300 having described in claim 1-6 any one, receiving antenna 100, input matching network 200, orthogonal mixer 400 and trans-impedance amplifier 500, described receiving antenna 100 output terminals connect described input matching network 200 input ends, described input matching network 200 output terminals connect described low noise amplifier 300 input ends, described low noise amplifier 300 output terminals connect described orthogonal mixer 400 input ends, described orthogonal mixer 400 output terminals connect described trans-impedance amplifier 500 input ends, described trans-impedance amplifier 500 output terminal output intermediate-freuqncy signals, described low noise amplifier reduces reflection loss for useful signal being carried out to impedance matching, undesired signal is presented to high impedance and suppress settling signal amplification output, described receiving antenna, for receiving electronic signal and output signal, described input matching network, for carrying out passage coupling to the signal of double frequency receiving antenna input different frequency, described orthogonal mixer, carries out down-converted for the radiofrequency signal that low noise amplifier was processed, described trans-impedance amplifier, for being converted into radiofrequency signal electric current output.。After the useful signal that receiving antenna 100 receives is processed with the low noise amplifier 300 that disturbs the outer interference of process band to suppress, useful signal amplifies, interference suppresses, through thering is out-of-band-signal, disturb the 300 pairs of interference of low noise amplifier that suppress to suppress, the frequency mixer 400 passing through subsequently and trans-impedance amplifier 500, residual interference is further suppressed, reach and disturb high inhibition ability (being greater than 45dB), radio-frequency front-end plate level Out-of-band rejection is achieved without SAW filter system.
Signal receives by antenna 100, through input matching network 20050ohm impedance matching network, to thering are 300 pairs of interference of low noise amplifier, suppress, by 400 pairs of radiofrequency signals of frequency mixer, carry out down coversion subsequently, finally by trans-impedance amplifier 500, signal is converted into electric current input analog filter, undesired signal is further suppressed, and carry out signal bandwidth selection.
Described orthogonal mixer 400 is two, and the input end of two described orthogonal mixers 400 connects respectively described low noise amplifier 300 input ends.
Described trans-impedance amplifier 500 is two, and described in each, trans-impedance amplifier 500 input ends are connected with described frequency mixer 400 output terminals respectively.
As shown in Figure 5, described trans-impedance amplifier 500 comprises amplifier A1, resistance R 3 and the capacitor C 3 of single-ended input Single-end output, in parallel to output terminal with the input end of described amplifier A1 after described resistance R 3 is in parallel with described capacitor C 3.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a low noise amplifier, it is characterized in that: this amplifier comprises filtration module, Signal Matching module, amplification module, disturb and suppress module and output frequency-selecting module, described filtration module output terminal connects described Signal Matching module input, described Signal Matching module output terminal connects described amplification module input end, described amplification module output terminal connects described interference and suppresses module input, described amplification module output terminal connects described output frequency-selecting module input, described output frequency-selecting module output terminal output signal, described interference suppresses module and carries out impedance matching minimizing reflection loss for useful signal, undesired signal is presented to high impedance to be suppressed, by output frequency-selecting module settling signal, export.
2. low noise amplifier according to claim 1, it is characterized in that, described interference suppresses module and comprises inductance L s1, inductance L s2, capacitor C m and constant current source, one end of described inductance L s1 connects respectively one end of described inductance L s2 and the input end of constant current source, the other end of described inductance L s2 connects one end of described capacitor C m, described constant current source output head grounding, described capacitor C m other end ground connection.
3. low noise amplifier according to claim 2, is characterized in that, described filtration module comprises inductance L 1 and capacitor C 1, and described inductance L 1 one end connects described capacitor C 1 one end, described capacitor C 1 other end ground connection.
4. low noise amplifier according to claim 1, it is characterized in that, described interference suppresses module and comprises inductance L s1, equivalent reactance X2 and constant current source, described inductance L s1 one end connects described equivalent reactance X2 one end, described equivalent reactance X2 other end ground connection, described inductance L s1 one end connects described Constant current input end, described constant current source output head grounding.
5. low noise amplifier according to claim 4, is characterized in that, described filtration module comprises equivalent reactance X 1, and described equivalent reactance X 1 one end connects input signal, described equivalent reactance X 1 other end ground connection.
6. according to the low noise amplifier described in claim 3 or 5, it is characterized in that, described Signal Matching module comprises inductance L g and capacitor C gs, and described inductance L g one end connects capacitor C gs one end, and the described capacitor C gs other end connects the other end of described inductance L s1; Amplification module comprises N-MOS pipe M1 and N-MOS pipe M2, described N-MOS pipe M1 grid connects one end of described inductance L g, the source electrode of described N-MOS pipe M1 connects the other end of described inductance L s1, the drain electrode of described N-MOS pipe M1 connects the source electrode of described N-MOS pipe M2, and the grid of described N-MOS pipe M2 connects Vdd; Described frequency-selecting module comprises inductance L 2 and tunable capacitor C2, and described inductance L 2 is connected Vdd with one end after described tunable capacitor C2 parallel connection, and described inductance L 2 is connected drain electrode the output signal of described N-MOS pipe M2 with the other end after described tunable capacitor C2 parallel connection.
7. the radio system of a GNSS system receiver front end, it is characterized in that, this radio system comprises the low noise amplifier having described in claim 1-6 any one, receiving antenna, input matching network, orthogonal mixer and trans-impedance amplifier, described receiving antenna output terminal connects described input matching network input end, described input matching network output terminal connects described low noise amplifier input end, described low noise amplifier output terminal connects described orthogonal mixer input end, described orthogonal mixer output terminal connects described trans-impedance amplifier input end, described trans-impedance amplifier output terminal output intermediate-freuqncy signal, described low noise amplifier reduces reflection loss for useful signal being carried out to impedance matching, undesired signal is presented to high impedance and suppress settling signal amplification output, described receiving antenna, for receiving electronic signal and output signal, described input matching network, for carrying out passage coupling to the signal of double frequency receiving antenna input different frequency, described orthogonal mixer, carries out down-converted for the radiofrequency signal that low noise amplifier was processed, described trans-impedance amplifier, for being converted into radiofrequency signal electric current output.
8. radio system according to claim 7, is characterized in that, described orthogonal mixer is two, and the input end of two described orthogonal mixers connects respectively described low noise amplifier input end.
9. radio system according to claim 8, is characterized in that, described trans-impedance amplifier is two, and described in each, trans-impedance amplifier input end is connected with a described mixer output respectively.
10. according to the radio system described in claim 7-9 any one, it is characterized in that, described trans-impedance amplifier comprises amplifier A1, resistance R 3 and the capacitor C 3 of single-ended input Single-end output, in parallel to output terminal with the input end of described amplifier A1 after described resistance R 3 is in parallel with described capacitor C 3.
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| CN201420288543.3U CN203930070U (en) | 2014-05-30 | 2014-05-30 | The radio system of low noise amplifier and GNSS system receiver front end |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035105A (en) * | 2014-05-30 | 2014-09-10 | 深圳贝特莱电子科技有限公司 | Low noise amplifier and radio frequency system at front end of GNSS system receiver |
| CN104485922A (en) * | 2014-12-17 | 2015-04-01 | 上海斐讯数据通信技术有限公司 | Circuit and method for decreasing circuit power consumption |
| CN104765051A (en) * | 2015-03-24 | 2015-07-08 | 芜湖航飞科技股份有限公司 | Carrier tracking system of GPS satellite receiver |
| CN104980178A (en) * | 2015-07-08 | 2015-10-14 | 泉州市琪祥电子科技有限公司 | Novel receiving circuit |
| WO2022174631A1 (en) * | 2021-02-18 | 2022-08-25 | 广州慧智微电子股份有限公司 | Multi-frequency low noise amplifier |
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2014
- 2014-05-30 CN CN201420288543.3U patent/CN203930070U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035105A (en) * | 2014-05-30 | 2014-09-10 | 深圳贝特莱电子科技有限公司 | Low noise amplifier and radio frequency system at front end of GNSS system receiver |
| CN104485922A (en) * | 2014-12-17 | 2015-04-01 | 上海斐讯数据通信技术有限公司 | Circuit and method for decreasing circuit power consumption |
| CN104485922B (en) * | 2014-12-17 | 2018-10-12 | 上海斐讯数据通信技术有限公司 | The method for reducing the circuit of circuit power consumption and reducing circuit power consumption |
| CN104765051A (en) * | 2015-03-24 | 2015-07-08 | 芜湖航飞科技股份有限公司 | Carrier tracking system of GPS satellite receiver |
| CN104980178A (en) * | 2015-07-08 | 2015-10-14 | 泉州市琪祥电子科技有限公司 | Novel receiving circuit |
| WO2022174631A1 (en) * | 2021-02-18 | 2022-08-25 | 广州慧智微电子股份有限公司 | Multi-frequency low noise amplifier |
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Address after: 518000 Nanshan District, Guangdong, China Hi Tech in the two Shenzhen International Software Park, building 4, 402-403, Patentee after: SHENZHEN BETTERLIFE ELECTRONIC SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 518000 Nanshan District, Guangdong, China Hi Tech in the two Shenzhen International Software Park, building 4, 402-403, Patentee before: SHENZHEN BETTERLIFE ELECTRONIC SCIENCE AND TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20160510 Address after: 201206 Shanghai city Pudong New Area gold Yulu No. 100 building 1 room 1219 Patentee after: SHANGHAI YB ELECTRONICS CO.,LTD. Address before: 518000 Nanshan District, Guangdong, China Hi Tech in the two Shenzhen International Software Park, building 4, 402-403, Patentee before: SHENZHEN BETTERLIFE ELECTRONIC SCIENCE AND TECHNOLOGY Co.,Ltd. |
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