CN101674052A - Grading bypass circuit for tower amplifier and control method thereof - Google Patents
Grading bypass circuit for tower amplifier and control method thereof Download PDFInfo
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- CN101674052A CN101674052A CN200910192617A CN200910192617A CN101674052A CN 101674052 A CN101674052 A CN 101674052A CN 200910192617 A CN200910192617 A CN 200910192617A CN 200910192617 A CN200910192617 A CN 200910192617A CN 101674052 A CN101674052 A CN 101674052A
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- amplifier
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- diverter switch
- movable end
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
Abstract
The invention discloses a grading bypass circuit for a tower amplifier and a control method thereof; the circuit comprises a preamplifier, a post amplifier, three selector switches and two branch circuit connecting lines with lambda/2 length, each selector switch is provided with a common terminal and one of movable ends, which is connected with the common terminal, all the selector switches are controlled to carry out comprehensive switching by combining the working state of the preamplifier and the post amplifier, so as to lead the circuit to have a state I that a first selector switch, thepreamplifier, a second selector switch, the post amplifier and a third selector switch which are conducted sequentially; and a state II that the first selector switch, the preamplifier, a second branch circuit connecting line and a third selector switch which are conducted sequentially; and a state III that the first selector switch, a first branch circuit connecting line and the third selector switch which are conducted sequentially; the invention simplifies the structure of the grading bypass circuit, and the cost is reduced correspondingly; on the electrical performance, bypass loss and thewhole power consumption are further reduced.
Description
Technical field
The present invention relates to a kind of grading bypass circuit and control method thereof that is used for tower amplifier.
Background technology
Tower amplifier (TMA) is by the front end at base station receiving system, promptly increase the reception noise factor that a low noise amplifier reduces whole system down near reception antenna, improve the receiving sensitivity of whole system, improve the new network optimizing equipment of base station receptivity.
Tower amplifier all possesses bypass functionality, and especially the high-gain tower is released and possessed the classification bypass functionality.General common classification bypass mode as shown in Figure 1.Amplifier comprises pre-amplifier A1 and post-amplifier A2, respectively insert two single-pole double-throw switch (SPDT) S1, S2, S3 at amplifier A1 and A2 both sides separately, S4, and the single-pole double-throw switch (SPDT) S1 in pre-amplifier A1 both sides among the S2, connects the first bypass P1, single-pole double throw shape S3 in the post-amplifier both sides, among the S4, connect the second bypass P2, the common port series connection of single-pole double-throw switch (SPDT) S2 and S3.
When two towers were put operate as normal, single-pole double-throw switch (SPDT) S1, S2, S3, S4 were connected with A1, A2 respectively, and signal is entered through A1 and the straight-through output of A2 from S1; When post-amplifier A2 lost efficacy and pre-amplifier A1 just often (minor failure pattern), single-pole double-throw switch (SPDT) S1, S2 are connected with pre-amplifier A1, and S3, S4 then pass through the connection of P2 branch road; When prime amplifier A1 lost efficacy (important fault mode), single-pole double-throw switch (SPDT) S1, S2, S3, S4 successively connect straight-through by two branch road P1, P2.
In theory, during pre-amplifier A1 fault, also exist S1, S2 to connect conducting A1 then, the logic that S3, S4 connect by A2 by P1 when post-amplifier A2 fault-free.But it should be noted that A2 promotes the level power amplifier, in order to guarantee that sufficiently high gain is with the linearity, noise factor exceeds more than the 2dB with respect to A1 (low noise amplifier) at least, A2 works independently and is equivalent to the noise factor that tower puts and significantly raises, the main effect that tower is placed in the network also disappears thereupon, so this situation should not exist.
By above-mentioned analysis as seen, existing grading bypass circuit, under important fault mode, 4 switches of having connected on the link cause shunt loss excessive, and number of switches are too much, cause Overall Power Consumption, cost to remain high.
Summary of the invention
Primary and foremost purpose of the present invention is at the deficiencies in the prior art, and a kind of grading bypass circuit that is used for tower amplifier is provided, with the electric property that improves this kind circuit and reduce its cost.
Another object of the present invention is to provide a kind of control method, facilitate for realizing automation control at above-mentioned grading bypass circuit.
For realizing this purpose, the present invention takes following technical scheme:
The grading bypass circuit that is used for tower amplifier of the present invention comprises pre-amplifier, post-amplifier, three diverter switches and two branch road connecting lines, and each diverter switch has a common port and selects a movable end that is connected with common port with two, wherein:
The common port of first diverter switch is used for signal input, and one of its movable end is connected with the input of pre-amplifier, and two one of the movable ends by the first branch road connecting line and the 3rd diverter switch of its movable end are connected;
The output of pre-amplifier is connected with the common port of second diverter switch;
One of movable end of second diverter switch is connected with the input of post-amplifier, and two of its movable end is connected with the movable end that is same as employed the 3rd diverter switch of the first branch road connecting line by the second branch road connecting line;
Two of the movable end of the output of post-amplifier and the 3rd diverter switch is connected;
The common port of the 3rd diverter switch is used for signal output.
Described diverter switch is the radio frequency single-pole double-throw switch (SPDT), and described branch road connecting line length is 1/2 signal frequency operation wavelength, and realizes with microstrip line.
This circuit has following connection status:
State one: the first diverter switch, pre-amplifier, second diverter switch, post-amplifier, the 3rd diverter switch connect conducting in regular turn;
State two: the first diverter switches, pre-amplifier, the second branch road connecting line, the 3rd diverter switches connect conducting in regular turn;
State three: the first diverter switches, the first branch road connecting line, the 3rd diverter switches connect conducting in regular turn.
The control method of grading bypass circuit of the present invention is controlled for aforementioned grading bypass circuit, comprises the switch step of following state:
When prime amplifier and the equal operate as normal of post-amplifier, make first diverter switch switch to the state that movable end that common port is connected with the pre-amplifier input is connected, make second diverter switch switch to the state that movable end that common port is connected with the post-amplifier input is connected, make the 3rd diverter switch switch to the state that movable end that common port is connected with the post-amplifier output is connected;
When the post-amplifier fault, make first diverter switch switch to the state that movable end that common port is connected with the pre-amplifier input is connected, make second diverter switch switch to the state that movable end that common port is connected with the second branch road connecting line is connected, make the 3rd diverter switch switch to the state that movable end that common port is connected with the second branch road connecting line is connected;
When prime amplifier fault, make first diverter switch switch to the state that movable end that common port is connected with the first branch road connecting line is connected, make the 3rd diverter switch switch to the state that movable end that common port is connected with the first branch road connecting line is connected.
Compared with prior art, the present invention has following advantage:
At first, under less important and important fault mode, promptly under the situation that any one amplifier breaks down, owing to adopted the open circuit branch road connecting line of 1/2 operation wavelength, its theoretic loss is zero, so can reduce the loss that additional branches is introduced greatly;
Secondly, under the important fault mode, promptly when the prime amplifier breaks down, the annexation of existence three, whole link have reduced by a diverter switch, and shunt loss is reduced, even and under other free position, also having reduced by a diverter switch relatively, shunt loss is also less than normal generally;
Moreover, because structural relative simplification make the power consumption of entire circuit obviously descend, and the simplification of structure makes that also cost significantly reduces.
Description of drawings
Fig. 1 is the principle schematic of traditional grading bypass circuit;
Fig. 2 is used for the principle schematic of the grading bypass circuit of tower amplifier for the present invention;
Principle schematic when the grading bypass circuit that Fig. 3 is used for tower amplifier for the present invention is in normal operating conditions;
Principle schematic when the grading bypass circuit that Fig. 4 is used for tower amplifier for the present invention is in the minor failure pattern;
Principle schematic when the grading bypass circuit that Fig. 5 is used for tower amplifier for the present invention is in important fault mode.
Embodiment
Followingly describe in conjunction with the accompanying drawings and embodiments:
See also Fig. 2, the present invention is used for the grading bypass circuit of tower amplifier, comprises pre-amplifier A1, post-amplifier A2, three diverter switch S1, S2, S3 and two branch road connecting line P1, P2.
Described pre-amplifier A1 is as low noise amplifier, and post-amplifier A2 is as promoting the level amplifier, and when normal operating conditions, both successively amplify signal.
Described diverter switch S1, S2, S3 is the radio frequency single-pole double-throw switch (SPDT) in the present embodiment, be controlled by certain control logic that is integrated and carry out different connection status switchings, each diverter switch S1, S2 or S3 have a common port and select a movable end that is connected with common port with two, and therefore, same diverter switch only has unique a kind of connection status at synchronization.Those skilled in the art should know, and diverter switch of the present invention is not limited to the radio frequency single-pole double-throw switch (SPDT), can also be the virtual signal switches such as the electronic signal triggering and conducting, and the switch of other form etc.
Described two branch road connecting line P1 and P2, comprise the first branch road connecting line P1 and the second branch road connecting line P2, all adopting 1/2 signal frequency operation wavelength is length, be λ/2, in the present embodiment, adopt microstrip line as the branch road connecting line, those skilled in the art should know, and the branch road connecting line can also adopt other known physical form to replace.
As shown in Figure 2, the concrete annexation of grading bypass circuit of the present invention is as follows:
Among the first diverter switch S1, its common port 10 is used for signal input RFin, one of its movable end 11 is connected with the input of pre-amplifier A1,2 12 one of the movable ends 32 by the first branch road connecting line P1 and the 3rd diverter switch S3 of its movable end are connected, and also are that 2 12 of its movable end are connected with the end of the first branch road connecting line P1;
The output of pre-amplifier A1 is connected with the common port 20 of the second diverter switch S2;
Among the second diverter switch S2, one of its movable end 21 is connected with the input of post-amplifier A2,2 22 of its movable end is connected with the movable end 32 that is same as employed the 3rd diverter switch S3 of the first branch road connecting line P1 by the second branch road connecting line P2, also promptly, the first branch road connecting line P1 is connected with the same movable end 32 of the 3rd diverter switch S3 jointly with second a branch road connecting line P2 end separately;
The output of post-amplifier A2 is connected with another movable end 31 of the 3rd diverter switch S3;
The common port 30 of the 3rd diverter switch S3 is used for signal output RFout.
According to definition of the present invention, signal system imports RFin from the common port 10 of the first diverter switch S1, and exports RFout from the common port 30 of the 3rd diverter switch S3.
On the basis of above-mentioned physical connection, the control method of utilization grading bypass circuit of the present invention can make aforementioned grading bypass circuit switch in normal operating conditions, minor failure mode state and three kinds of states of important fault mode.
Described normal operating conditions, be meant the state when pre-amplifier A1 and post-amplifier A2 all run well, under this state, the minor failure pattern is meant the pre-amplifier A1 operate as normal state during level amplifier A2 fault then, and no matter important fault mode then is meant as long as pre-amplifier A1 breaks down the whether normal situation of operating state of post-amplifier A2.
Normal operating conditions, minor failure pattern and important fault mode, can learn by the working signal of judging pre-amplifier A1 and post-amplifier A2, can adopt known decision method to know corresponding state, then be used for control method of the present invention, and relate to the judgement of different operating state, because of not belonging to innovation part of the present invention, so not all right giving unnecessary details.
Please complex chart 3, Fig. 4 and Fig. 5, the control method of grading bypass circuit of the present invention comprises the switch step of following state:
When prime amplifier A1 and the equal operate as normal of post-amplifier A2, as shown in Figure 3, make the first diverter switch S1 switch to the state that movable end 11 that common port 10 is connected with pre-amplifier A1 input is connected, make the second diverter switch S2 switch to the state that movable end 21 that common port 20 is connected with post-amplifier A2 input is connected, make the 3rd diverter switch S3 switch to the state that movable end 31 that common port 30 is connected with post-amplifier A2 output is connected; Through this process, the first diverter switch S1, pre-amplifier A1, the second diverter switch S2, post-amplifier A2, the 3rd diverter switch S3 connect conducting in regular turn, two branch road connecting line P1 and P2 be not all in the access link, so operate as normal is had no effect, needn't consider the problem of shunt loss since the institute through diverter switch S1, S2, the relative conventional art of S3 number reduces, and reduces relatively so the power consumption of this link is inevitable;
When post-amplifier A2 fault, circuit is in the minor failure pattern, as shown in Figure 4, make the first diverter switch S1 switch to the state that movable end 11 that common port 10 is connected with pre-amplifier A1 input is connected, make the second diverter switch S2 switch to the state that movable end 22 that common port 20 is connected with the second branch road connecting line P2 is connected, make the 3rd diverter switch S3 switch to the state that movable end 32 that common port 30 is connected with the second branch road connecting line P2 is connected; Through this step, the first diverter switch S1, pre-amplifier A1, the second branch road connecting line P2, the 3rd diverter switch S3 connect conducting in regular turn, have only in the second branch road connecting line P2 access link, be equivalent to disconnect post-amplifier A2, because the total reflection effect of the open circuit branch road connecting line P2 of 1/2 signal frequency operation wavelength, can not produce extra link load, and in like manner its institute is also less through the diverter switch number, so on shunt loss, Overall Power Consumption, all be improved;
When prime amplifier A1 fault, circuit is in important fault mode, as shown in Figure 5, make the first diverter switch S1 switch to the state that movable end 12 that common port 10 is connected with the first branch road connecting line P1 is connected, make the 3rd diverter switch S3 switch to the state that movable end 32 that common port 30 is connected with the first branch road connecting line P1 is connected, thus, the first diverter switch S1, the first branch road connecting line P1, the 3rd diverter switch S3 connects conducting in regular turn, and the connection status of the second diverter switch S2 can be ignored, at this moment, still have only the first branch road connecting line P1 only a branch road be introduced in the link, be equivalent to pre-amplifier A1 and post-amplifier A2 all is disconnected, in like manner still exist λ/2 wavelength open lines total reflection effect and avoid shunt loss.
As seen, because the improvement of grading bypass circuit of the present invention, and the proposition of corresponding control method, make the structure of sort circuit further simplify and the corresponding reduction of cost, on electric property, also make shunt loss and Overall Power Consumption further be minimized.
Above embodiment is used to explain claim of the present invention, but does not constitute any limitation of the invention, and the equivalence that those skilled in the art are made on the basis of the foregoing description is replaced, and all should be considered as not unconventional invention spirit of the present invention.
Claims (6)
1, a kind of grading bypass circuit that is used for tower amplifier, comprise pre-amplifier, post-amplifier, three diverter switches and two branch road connecting lines, each diverter switch has a common port and selects a movable end that is connected with common port with two, it is characterized in that:
The common port of first diverter switch is used for signal input, and one of its movable end is connected with the input of pre-amplifier, and two one of the movable ends by the first branch road connecting line and the 3rd diverter switch of its movable end are connected;
The output of pre-amplifier is connected with the common port of second diverter switch;
One of movable end of second diverter switch is connected with the input of post-amplifier, and two of its movable end is connected with the movable end that is same as employed the 3rd diverter switch of the first branch road connecting line by the second branch road connecting line;
Two of the movable end of the output of post-amplifier and the 3rd diverter switch is connected;
The common port of the 3rd diverter switch is used for signal output.
2, the grading bypass circuit that is used for tower amplifier according to claim 1 is characterized in that, described diverter switch is the radio frequency single-pole double-throw switch (SPDT).
3, the grading bypass circuit that is used for tower amplifier according to claim 1 and 2 is characterized in that: described branch road connecting line length is 1/2 signal frequency operation wavelength.
4, the grading bypass circuit that is used for tower amplifier according to claim 1 and 2 is characterized in that: described branch road connecting line is a microstrip line.
5, the grading bypass circuit that is used for tower amplifier according to claim 3 is characterized in that, this circuit has following connection status:
State one: the first diverter switch, pre-amplifier, second diverter switch, post-amplifier, the 3rd diverter switch connect conducting in regular turn;
State two: the first diverter switches, pre-amplifier, the second branch road connecting line, the 3rd diverter switches connect conducting in regular turn;
State three: the first diverter switches, the first branch road connecting line, the 3rd diverter switches connect conducting in regular turn.
6, a kind of control method as any described grading bypass circuit in the claim 1 to 5 is characterized in that this method comprises the switch step of following state:
When prime amplifier and the equal operate as normal of post-amplifier, make first diverter switch switch to the state that movable end that common port is connected with the pre-amplifier input is connected, make second diverter switch switch to the state that movable end that common port is connected with the post-amplifier input is connected, make the 3rd diverter switch switch to the state that movable end that common port is connected with the post-amplifier output is connected;
When the post-amplifier fault, make first diverter switch switch to the state that movable end that common port is connected with the pre-amplifier input is connected, make second diverter switch switch to the state that movable end that common port is connected with the second branch road connecting line is connected, make the 3rd diverter switch switch to the state that movable end that common port is connected with the second branch road connecting line is connected;
When prime amplifier fault, make first diverter switch switch to the state that movable end that common port is connected with the first branch road connecting line is connected, make the 3rd diverter switch switch to the state that movable end that common port is connected with the first branch road connecting line is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910192617A CN101674052A (en) | 2009-09-23 | 2009-09-23 | Grading bypass circuit for tower amplifier and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910192617A CN101674052A (en) | 2009-09-23 | 2009-09-23 | Grading bypass circuit for tower amplifier and control method thereof |
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| Publication Number | Publication Date |
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| CN101674052A true CN101674052A (en) | 2010-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910192617A Pending CN101674052A (en) | 2009-09-23 | 2009-09-23 | Grading bypass circuit for tower amplifier and control method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355204A (en) * | 2011-05-20 | 2012-02-15 | 深圳市纳芯威科技有限公司 | Automatic audio power amplifier switching circuit and power amplifier chip |
| CN103916144A (en) * | 2013-01-05 | 2014-07-09 | 北京北广科技股份有限公司 | Self-adaptive correction method and device for power amplifier units of very-low-frequency long-wave transmitter |
| WO2016043902A1 (en) * | 2014-09-19 | 2016-03-24 | Qualcomm Incorporated | Dual stage low noise amplifier for multiband receiver |
| US10177722B2 (en) | 2016-01-12 | 2019-01-08 | Qualcomm Incorporated | Carrier aggregation low-noise amplifier with tunable integrated power splitter |
| WO2022000764A1 (en) * | 2020-06-28 | 2022-01-06 | 广州慧智微电子有限公司 | Amplifier circuit structure and circuit control method |
-
2009
- 2009-09-23 CN CN200910192617A patent/CN101674052A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355204A (en) * | 2011-05-20 | 2012-02-15 | 深圳市纳芯威科技有限公司 | Automatic audio power amplifier switching circuit and power amplifier chip |
| CN102355204B (en) * | 2011-05-20 | 2014-04-16 | 深圳市纳芯威科技有限公司 | Automatic audio power amplifier switching circuit and power amplifier chip |
| CN103916144A (en) * | 2013-01-05 | 2014-07-09 | 北京北广科技股份有限公司 | Self-adaptive correction method and device for power amplifier units of very-low-frequency long-wave transmitter |
| CN103916144B (en) * | 2013-01-05 | 2016-09-28 | 北京北广科技股份有限公司 | Very low frequency long-wave transmitter power amplifier unit self-adapting correction method and device |
| WO2016043902A1 (en) * | 2014-09-19 | 2016-03-24 | Qualcomm Incorporated | Dual stage low noise amplifier for multiband receiver |
| US9431963B2 (en) | 2014-09-19 | 2016-08-30 | Qualcomm Incorporated | Dual stage low noise amplifier for multiband receiver |
| CN106716850A (en) * | 2014-09-19 | 2017-05-24 | 高通股份有限公司 | Dual stage low noise amplifier for multiband receiver |
| US9755591B2 (en) | 2014-09-19 | 2017-09-05 | Qualcomm Incorporated | Dual stage low noise amplifier for multiband receiver |
| EP3402080A1 (en) * | 2014-09-19 | 2018-11-14 | QUALCOMM Incorporated | Dual stage low noise amplifier for multiband receiver |
| CN106716850B (en) * | 2014-09-19 | 2019-10-22 | 高通股份有限公司 | Twin-stage low-noise amplifier for multifrequency receiver (MFR) |
| US10177722B2 (en) | 2016-01-12 | 2019-01-08 | Qualcomm Incorporated | Carrier aggregation low-noise amplifier with tunable integrated power splitter |
| WO2022000764A1 (en) * | 2020-06-28 | 2022-01-06 | 广州慧智微电子有限公司 | Amplifier circuit structure and circuit control method |
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Application publication date: 20100317 |