CN200986578Y - Low noise amplifier monitor alarming device - Google Patents
Low noise amplifier monitor alarming device Download PDFInfo
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- CN200986578Y CN200986578Y CN 200620145433 CN200620145433U CN200986578Y CN 200986578 Y CN200986578 Y CN 200986578Y CN 200620145433 CN200620145433 CN 200620145433 CN 200620145433 U CN200620145433 U CN 200620145433U CN 200986578 Y CN200986578 Y CN 200986578Y
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- low noise
- noise amplifier
- alarm device
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- 230000003321 amplification Effects 0.000 claims abstract description 46
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 46
- 238000012544 monitoring process Methods 0.000 claims abstract description 37
- 230000000052 comparative effect Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 abstract 3
- 238000004891 communication Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 101100321817 Human parvovirus B19 (strain HV) 7.5K gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model relates to a low noise amplifier monitoring alarm device including a power supply module and an amplification module which amplifies signals. The two modules are electrically connected. The utility model also comprises a differential amplification module which is electrically connected with the amplification module and respectively carries through differential amplification on the sampling signals of the power supply and amplification module, a comparator which compares the two sampling signals after amplification, and a comparator level output circuit which sends out a monitoring signal according to the compared result of the comparator. The low noise amplifier monitoring alarm device of the utility model compares the monitoring sampling signals of the power supply module and the amplification module after differential amplification through the differential amplification module and estimate whether the low noise amplifier is in a normal working state or not according to the compared result and whether the low noise amplifier needs changing or not so as to maintain the system in a normal operation.
Description
Technical field
The utility model relates to the wireless communication RF devices field, relates generally to a kind of monitoring alarm device that is used for the radio-frequency devices low noise amplifier.
Background technology
Low noise amplifier is the important component part of wireless communication field, and it generally is applied to receiving system, radar receiving system, the satellite communication receiving system of wireless base station.In order to guarantee that low noise amplifier can both reach a comparatively desirable value having input under the lower noise figure prerequisite, output standing-wave ratio (SWR) and third order intermodulation, the low noise amplifier of widespread usage all adopts at present is that balanced structure realizes (radio frequency low-noise amplifier of the single-ended-to-difference of a kind of variable-gain that discloses as No. 02123628.3 patented claim of China).The balanced structure of low noise amplifier is to realize by adopting the 3dB electric bridge that the two-way amplifier chain is carried out mode in parallel.Yet, when the low noise amplifier of above-mentioned existing balanced structure is applied to the wireless base station, if an amplifier tube that uses in the low noise amplifier breaks down when causing a certain path not have radio signal transmission, at an other path also under the situation of operate as normal, worsening can appear in low noise amplifier parameters index, but the basic function that the required low noise amplifier in base station provides also exists, and the low noise amplifier of this moment is to need to change.And when low noise amplifier uses in the base station, base station equipment is not provide the index monitoring function to low noise amplifier, so if above-mentioned fault takes place, the base station can't learn whether low noise amplifier damages, can not point out timely replacing, keep failure operation.
The utility model content
Can't monitor the deficiency whether low noise amplifier damages in order to overcome the existing wireless communications radio system, the utility model provides a kind of low noise amplifier monitoring alarm device, it can be monitored low noise amplifier and whether be in normal operating conditions, being used to judge whether needs to change low noise amplifier, and the system that keeps normally moves.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of low noise amplifier monitoring alarm device is provided, power module of Dian Lianjieing and amplification module that signal is amplified successively, it also comprises: carry out the difference amplification module that difference is amplified respectively with the sampled signal to power supply and amplification module that described amplification module is electrically connected successively, the comparer that sampled signal after amplifying above-mentioned two compares, and according to the comparator level output circuit of comparer comparative result output monitor signal.
It comprises that also one is electrically connected and is subjected to the alarm device of its output level control with the comparator level output circuit.
Being in series with one between described amplification module and the power module is used for by the resistance of monitoring voltage realization to the monitoring of amplifier tube working current.
Described amplification module is an amplifier tube, and an end of described resistance is connected with power module, and the other end is connected with the end that powers up of amplifier tube.
Described sampled signal is the magnitude of voltage of power module and the magnitude of voltage that powers up the end link of described resistance and amplifier tube.
Described sampled signal after the differential amplification of difference amplification module also by the proportional amplification of an operational amplifier.
Described alarm module comprises triode reverser, voltage stabilizing diode and the protection diode that is used to export control alarm level.
Described alarm module also comprises and is used for alarming the light emitting diode that level gives the alarm according to above-mentioned control.
Described amplifier tube is the ATF34143 amplifier tube; described difference amplification module comprises a LM324; described comparer comprises the voltage bound comparator device that 2 LM324 form; described triode reverser is MMBT-4401; described voltage stabilizing diode is MMBZ5227, and described protection diode is SMCJ16C.
The beneficial effects of the utility model are: because the utility model low noise amplifier monitoring alarm device compares after by the differential amplification of monitoring sampled signal of difference amplification module with power module and amplification module, can judge according to comparative result whether low noise amplifier is in normal operating conditions, whether need change low noise amplifier, to realize that keeping system normally moves.
Description of drawings
Fig. 1 is the electric theory diagram of the utility model low noise amplifier monitoring alarm device.
Fig. 2 is the electrical schematic diagram of the utility model low noise amplifier monitoring alarm device one embodiment.
Embodiment
Below in conjunction with accompanying drawing technical scheme is described in further detail:
See also Fig. 1, the amplification module 20 that the utility model low noise amplifier monitoring alarm device comprises successively the power module 10 that connects, amplify signal, sampled signal is carried out difference amplification module 30, comparer 40, comparator level output circuit 50 and the alarm module 60 that difference is amplified, 20 pairs of input signals of amplification module amplify, can use some levels to carry out continuous amplification according to the required index that reaches, the monitoring alarm device all carries out the monitoring of electric current to the amplification module of each use.Be appreciated that above-mentioned module of the present utility model all can adopt the conduction band line that is printed on the pcb board to connect conducting.
The utility model low noise amplifier monitoring alarm device embodiment is, amplification module 20 adopts amplifier tube, the end series connection of powering up at amplifier tube inserts a resistance that is used to regulate the fixed size value of amplifier tube operating voltage, one end of resistance directly links to each other with power module 10, the other end can be directly with amplifier tube add that the fulgurite leg links to each other or connect again a resistance or a plurality of resistance after link to each other with the fulgurite leg that adds of amplifier tube again, because when using amplifier tube, fix and select a working current, so it also is fixed value that power module 10 provides current value, also fix so be connected between amplifier tube and the power module 10 ohmically current value.Adopt an end to connect the resistance of power module 10, with its other end as a monitoring point, just can be by the voltage of this monitoring point being monitored the monitoring that realizes the amplifier tube working current.After using difference amplification module 30 (as operational amplifiers) that the magnitude of voltage of monitoring point is carried out the difference amplification with the power source voltage value, re-use operational amplifier and carry out a certain proportion of amplification, re-use same amplifier and form a comparer 40, level control alarm module 60 (switching diode) output control level by comparer output, with its output, perhaps oppositely, after the amplification, dividing potential drop as the output of alarm signal level, also can be the control light emitting diode and realize alarm function.
See also Fig. 2, the amplification module 20 of present embodiment adopts the ATF34143 amplifier tube that signal is amplified, the running current of ATF34143 is 30mA, set and require to adopt LM324 that the check point voltage of the amplifier tube of 2 kinds of models is carried out difference, amplification, comparison the output of employing BAV70 biswitch diode connection comparer for electric current exceeds.Because of LM324 is a kind of chip of 4 amplifiers, so use a LM324 can finish the current detecting warning function that an amplifier tube is carried out.
By regulating the working current that R1 changes the ATF34143 field effect transistor, guarantee that current value is I1=30mA, change the operating voltage of ATF34143 field effect transistor by regulating R2, guarantee that magnitude of voltage is U1=4.5V, working current and operating voltage are to set according to the operating characteristic of ATF34143.The working current of ATF34143 is I1, and then the electric current by resistance R 3 is I1 just, and what the end of R3 connected is power supply, and then the U2 point voltage is:
U2＝VCC-I1R3＝5.5V-0.03×10＝5.2V
The voltage that U2 is ordered carries out the difference amplification by operational amplifier and the power supply of a LM324, and the resistance R 4 of present embodiment, R5, R6, R7 value are 680K:
U3＝U4＝VCC/(R5+R6)×R6＝2.75V
U5＝U3-(R7×(U2-U3)/R4)＝0.3V
The voltage that U5 is ordered carries out ratio through a LM324 again and amplifies, and selects to carry out 6 times of amplifications, and resistance R 8 values of present embodiment are 20K, and resistance R 9 values are 100K
U6＝U5 U7＝U6+R9×U6/R8＝1.8V
The voltage bound comparator device that the U7 point voltage is formed through 2 LM324, resistance R 10, R11 form bleeder circuit, and for amplifier U1_3 sets comparative level U8, resistance R 12, R13 form bleeder circuit, for amplifier U1_4 sets comparative level U9.Input voltage U7 is added between the negative input end of the positive input terminal of U1_3 and U1_4 simultaneously, and when U7＞U8, amplifier U1_3 exports high level; When U7＜U9, amplifier U1_4 exports high level.As long as amplifier U1_3, U1_4 have an output high level, transistor D will conducting.
The outputting alarm when amplifier tube in the present embodiment has 30% to change at electric current, the working current of amplifier tube exceed or be lower than operate as normal 30% the time, the voltage U 7 of input also just exceeds or is lower than 30%, so be provided with comparer on during Lower Threshold, the Upper threshold voltage of setting comparer according to the U7 voltage 1.8V that imports is: U8=2.34V, Lower Threshold is set at: U9=1.26V, comparison threshold value as required, in the setting, the resistance of the divider resistance of Lower Threshold is provided with according to ratio, use R10=7.5K in this example, R11=10K, R12=68, R13=20K carry out dividing potential drop to supply voltage value respectively and obtain needed threshold voltage.
When 30% variation appears in the amplifier tube electric current, U7 is by behind the comparer, amplifier U1_3, U1_4 just have a meeting output high level U10 in the comparer, switching diode D will conducting, because the Alerting requirements that the user need export is: normal condition is the output of 3V level, will export the voltage of 0-0.7V during alarm status.So when amplifier tube need be alarmed, behind the switching tube D1 conducting output high level, present embodiment used triode MMBT-4401 to be designed to a reverser, then Shu Chu alarm signal just for need the low level signal of 0-0.7V.When normal state; reverser does not have the level input; be U10=0V; alarm output Uo is a high level just; in order to guarantee output level Uo=3V; and requirement can be exported the drive current of 3mA; present embodiment use a stabilivolt D3 with the supply voltage of 5.5V surely to about the 3.2V; again by the final outputting alarm signal level of conduct behind the diode; consider the power dissipation problems of the stabilivolt of employing; selecting model for use is the 3.7V voltage stabilizing diode of MMBZ5227, regulates resistance R 16 and can regulate the output voltage size, and diode D2 selects for use SMCJ16C to be used for protective effect; to guarantee when the alarm delivery outlet has the level mistake to add, can not damage device; connect a 2K resistance as loading to ground at alarm output port, to guarantee the user when the alarm delivery outlet connects load testing, output driving current can not play too big variation.
Be appreciated that, in force, concrete parameter of the present utility model all can be regulated variation according to actual needs, the last Lower Threshold that is provided with as: the difference amplified voltage value of the working current of monitored amplifier tube and sampled voltage, setting, enlargement factor, comparer, the mode of alarm output and resistance value etc., its technical scheme all be adopt of the present utility model with current monitoring by voltage monitoring, sampled voltage by difference amplify, by operational amplifier composition comparer as monitoring scheme.
The above; it only is preferred embodiment of the present utility model; be not to be used to limit protection domain of the present utility model, all any modifications of within spirit of the present utility model and principle, being made, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (9)
1, a kind of low noise amplifier monitoring alarm device, power module of Dian Lianjieing and amplification module that signal is amplified successively, it is characterized in that also comprising: carry out the difference amplification module that difference is amplified respectively with the sampled signal that described amplification module is electrically connected successively to power supply and amplification module, the comparer that sampled signal after amplifying above-mentioned two compares, and according to the comparator level output circuit of comparer comparative result output monitor signal.
2, low noise amplifier monitoring alarm device as claimed in claim 1 is characterized in that: it comprises that also one is electrically connected and is subjected to the alarm device of its output level control with the comparator level output circuit.
3, low noise amplifier monitoring alarm device as claimed in claim 2 is characterized in that: be in series with one between described amplification module and the power module and be used for by the resistance of monitoring voltage realization to the monitoring of amplifier tube working current.
4, low noise amplifier monitoring alarm device as claimed in claim 3, it is characterized in that: described amplification module is an amplifier tube, and an end of described resistance is connected with power module, and the other end is connected with the end that powers up of amplifier tube.
5, low noise amplifier monitoring alarm device as claimed in claim 4 is characterized in that: described sampled signal is the magnitude of voltage of power module and the magnitude of voltage that powers up the end link of described resistance and amplifier tube.
6, low noise amplifier monitoring alarm device as claimed in claim 5 is characterized in that: described sampled signal after the differential amplification of difference amplification module also by the proportional amplification of an operational amplifier.
7, low noise amplifier monitoring alarm device as claimed in claim 6 is characterized in that: described alarm module comprises triode reverser, voltage stabilizing diode and the protection diode that is used to export control alarm level.
8, low noise amplifier monitoring alarm device as claimed in claim 7 is characterized in that: described alarm module also comprises and is used for alarming the light emitting diode that level gives the alarm according to above-mentioned control.
9, low noise amplifier monitoring alarm device as claimed in claim 8; it is characterized in that: described amplifier tube is the ATF34143 amplifier tube; described difference amplification module comprises a LM324; described comparer comprises the voltage bound comparator device that 2 LM324 form; described triode reverser is MMBT-4401; described voltage stabilizing diode is MMBZ5227, and described protection diode is SMCJ16C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620145433 CN200986578Y (en) | 2006-12-29 | 2006-12-29 | Low noise amplifier monitor alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620145433 CN200986578Y (en) | 2006-12-29 | 2006-12-29 | Low noise amplifier monitor alarming device |
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| CN200986578Y true CN200986578Y (en) | 2007-12-05 |
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| CN 200620145433 Expired - Fee Related CN200986578Y (en) | 2006-12-29 | 2006-12-29 | Low noise amplifier monitor alarming device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394709A (en) * | 2011-10-31 | 2012-03-28 | 武汉凡谷电子技术股份有限公司 | Alarm monitoring method and device for low-noise amplifier of double tower amplifiers |
| CN103595358A (en) * | 2012-08-17 | 2014-02-19 | 京信通信系统（广州）有限公司 | Radio frequency power amplifier and warning message saving method and device thereof |
| CN104467922A (en) * | 2014-12-29 | 2015-03-25 | 李大庆 | Information leakage prevention device |
| CN104484263A (en) * | 2014-12-29 | 2015-04-01 | 李大庆 | Working condition monitoring circuit |
| CN104535821A (en) * | 2014-12-29 | 2015-04-22 | 李大庆 | Working state indicating device |
| CN104539283A (en) * | 2014-12-29 | 2015-04-22 | 李大庆 | Operating state classification monitoring circuit |
| CN110832329A (en) * | 2017-07-05 | 2020-02-21 | 罗伯特·博世有限公司 | Device and method for checking the functional validity of a system resistor of a battery system |
| CN111239476A (en) * | 2018-11-29 | 2020-06-05 | 瑞昱半导体股份有限公司 | Signal detector and signal detection method |
-
2006
- 2006-12-29 CN CN 200620145433 patent/CN200986578Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394709A (en) * | 2011-10-31 | 2012-03-28 | 武汉凡谷电子技术股份有限公司 | Alarm monitoring method and device for low-noise amplifier of double tower amplifiers |
| CN102394709B (en) * | 2011-10-31 | 2013-11-06 | 武汉凡谷电子技术股份有限公司 | Alarm monitoring method and device for low-noise amplifier of double tower amplifiers |
| CN103595358A (en) * | 2012-08-17 | 2014-02-19 | 京信通信系统（广州）有限公司 | Radio frequency power amplifier and warning message saving method and device thereof |
| CN104467922A (en) * | 2014-12-29 | 2015-03-25 | 李大庆 | Information leakage prevention device |
| CN104484263A (en) * | 2014-12-29 | 2015-04-01 | 李大庆 | Working condition monitoring circuit |
| CN104535821A (en) * | 2014-12-29 | 2015-04-22 | 李大庆 | Working state indicating device |
| CN104539283A (en) * | 2014-12-29 | 2015-04-22 | 李大庆 | Operating state classification monitoring circuit |
| CN104539283B (en) * | 2014-12-29 | 2017-11-24 | 天津戎行华信科技有限公司 | Working condition classified Monitoring circuit |
| CN104484263B (en) * | 2014-12-29 | 2017-12-15 | 李大庆 | Working state monitoring circuit |
| CN110832329A (en) * | 2017-07-05 | 2020-02-21 | 罗伯特·博世有限公司 | Device and method for checking the functional validity of a system resistor of a battery system |
| CN111239476A (en) * | 2018-11-29 | 2020-06-05 | 瑞昱半导体股份有限公司 | Signal detector and signal detection method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20111229 |