CN110798153A - Radio frequency front-end analog compensation circuit - Google Patents
Radio frequency front-end analog compensation circuit Download PDFInfo
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- CN110798153A CN110798153A CN201911099692.9A CN201911099692A CN110798153A CN 110798153 A CN110798153 A CN 110798153A CN 201911099692 A CN201911099692 A CN 201911099692A CN 110798153 A CN110798153 A CN 110798153A
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- amplifier
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- temperature sensor
- radio frequency
- compensation circuit
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- 238000007667 floating Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a radio frequency front-end analog compensation circuit, which comprises a first amplifier (1), a second amplifier (2), an isolator (3), an antenna (4), a temperature sensor (5) and a differential arithmetic unit (6), wherein the temperature sensor (5) is arranged at the periphery of the second amplifier (2) and is used for collecting temperature change in real time; radio frequency signals are radiated out through an isolator (3) and an antenna (4) after passing through a first amplifier (1) and a second amplifier (2); as the working time is increased, the temperature of the amplifier module is increased due to heat consumption generated by the second amplifier (2), the voltage value collected by the temperature sensor (5) is changed, and the grid bias voltage of the second amplifier (2) is compensated through a change result obtained by carrying out differential operation on the change quantity of the temperature sensor (5) through the differential operation device (6). The invention can sense the temperature change of the heat source in real time, correspondingly adjust the gain of the circuit and has the advantages of large control range and strong real-time property.
Description
Technical Field
The invention belongs to the related technical field of radio frequency front end circuit design in a data link wireless communication link, relates to a radio frequency front end analog compensation circuit, and particularly relates to a circuit gain analog compensation technology of a radio frequency front end module.
Background
In a data link wireless communication link, a radio frequency front-end module plays a very important role as an indispensable component. However, due to the material characteristics, the rf device has a gain output that varies with temperature, and thus the output power also varies with temperature. The inherent variation law of the radio frequency device is as follows: the gain is reduced at high temperature, and the output power is reduced; the gain increases at low temperature and the output power increases.
In order to make the system work more stably at the full temperature required by the system, a common temperature compensation method is to add a temperature compensation attenuator to an input small signal end. Namely: the temperature compensation attenuator can increase the attenuation at low temperature and reduce the attenuation at high temperature. When the temperature compensation attenuator is arranged, the temperature compensation attenuator is far away from a heat source, the temperature sensitivity is poor, and the real-time adjustment performance is poor.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: aiming at the defects that the attenuation of the temperature compensation attenuator is influenced by the performance of the device when the temperature compensation attenuator is compensated and the upper limit and the lower limit have fixed values, a brand new radio frequency front end analog compensation circuit is provided, the full-temperature automatic compensation technology of a radio frequency front end module is realized, the link stability of the module is realized, the compensation instantaneity of the radio frequency front end is obviously improved, and the performance of a receiving link is not influenced.
(II) technical scheme
In order to solve the above technical problems, the present invention provides a radio frequency front end analog compensation circuit, which comprises a first amplifier 1, a second amplifier 2, an isolator 3, an antenna 4, a temperature sensor 5 and a differential operator 6, wherein the temperature sensor 5 is arranged at the periphery of the second amplifier 2 to collect temperature variation in real time; after passing through the first amplifier 1 and the second amplifier 2, the radio frequency signal is radiated out through the isolator 3 and the antenna 4; as the working time increases, the temperature of the amplifier module is increased due to heat consumption generated by the second amplifier 2, the voltage value collected by the temperature sensor 5 is changed, and the grid bias voltage of the second amplifier 2 is compensated through a change result obtained by carrying out differential operation on the change quantity of the temperature sensor 5 through the differential operation device 6.
The second amplifier 2 is used as a heat source, and the gate bias voltage of the second amplifier 2 is compensated through operation by sensing the temperature change of the second amplifier 2.
When the temperature of the second amplifier 2 is increased, the floating value of the gate voltage is increased through operation.
When the temperature of the second amplifier 2 is lowered, the floating value of the gate voltage is lowered through operation.
(III) advantageous effects
According to the radio frequency front-end analog compensation circuit provided by the technical scheme, the output voltage value of the sensor is different along with the change of temperature in a mode of combining the temperature sensor and the operational amplifier, so that the gate voltage of a final-stage amplifier in the radio frequency front-end module is controlled to change through the operational amplifier, the gain of the module is controlled in such a way, and the output power of the power amplifier is influenced; the invention can sense the temperature change of the heat source in real time, correspondingly adjust the gain of the circuit and has the advantages of large control range and strong real-time property.
Drawings
Fig. 1 is a schematic block diagram of the novel analog compensation technique circuit of the present invention.
In the figure, 1-first amplifier, 2-second amplifier, 3-isolator, 4-antenna, 5-temperature sensor, 6-difference operator.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
The radio frequency front-end analog compensation circuit can sense the temperature of the existing module through the temperature sensor when the temperature changes, and then controls the grid voltage of the final amplifier through the operational amplifier, thereby controlling the output power at the full temperature.
The invention is a radio frequency front end analog compensation technology, the circuit schematic diagram of which is shown in figure 1, the radio frequency front end analog compensation circuit comprises a first amplifier 1, a second amplifier 2, an isolator 3, an antenna 4, a temperature sensor 5 and a difference arithmetic unit 6, wherein the temperature sensor 5 is arranged at the periphery of the second amplifier 2 and is used for collecting temperature change in real time; after passing through the first amplifier 1 and the second amplifier 2, the radio frequency signal is radiated out through the isolator 3 and the antenna 4; along with the continuous increase of the working time, the temperature of the module is increased due to heat consumption generated by the second amplifier 2, the voltage value collected by the temperature sensor 5 is continuously changed, and the grid bias voltage of the second amplifier 2 is compensated through a change result obtained by carrying out differential operation on the change quantity of the temperature sensor 5 through the differential operation device 6.
Compared with the traditional radio frequency front-end module, the scheme of the invention adds two parts, namely the temperature sensor and the differential operator. The second amplifier 2 of the radio frequency front end module is a main heat source, the grid bias voltage of the second amplifier 2 is compensated through operation by sensing the temperature change of the second amplifier 2, when the temperature is increased, the grid voltage floating value is increased through operation, and when the temperature is reduced, the grid voltage floating value is reduced through operation, so that the level stable output of the radio frequency front end module is ensured through the method.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A radio frequency front-end analog compensation circuit is characterized by comprising a first amplifier (1), a second amplifier (2), an isolator (3), an antenna (4), a temperature sensor (5) and a differential arithmetic unit (6), wherein the temperature sensor (5) is arranged at the periphery of the second amplifier (2) and is used for collecting temperature change in real time; radio frequency signals are radiated out through an isolator (3) and an antenna (4) after passing through a first amplifier (1) and a second amplifier (2); as the working time is increased, the temperature of the amplifier module is increased due to heat consumption generated by the second amplifier (2), the voltage value collected by the temperature sensor (5) is changed, and the grid bias voltage of the second amplifier (2) is compensated through a change result obtained by carrying out differential operation on the change quantity of the temperature sensor (5) through the differential operation device (6).
2. The rf front-end analog compensation circuit of claim 1, wherein the second amplifier (2) is used as a heat source to compensate the gate bias voltage of the second amplifier (2) by sensing the temperature variation of the second amplifier (2).
3. The rf front-end analog compensation circuit of claim 2, wherein the second amplifier (2) is operated to increase the gate voltage floating value as the temperature increases.
4. The RF front-end analog compensation circuit of claim 3, wherein the second amplifier (2) operates to reduce the gate voltage floating value when the temperature is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911099692.9A CN110798153A (en) | 2019-11-12 | 2019-11-12 | Radio frequency front-end analog compensation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911099692.9A CN110798153A (en) | 2019-11-12 | 2019-11-12 | Radio frequency front-end analog compensation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110798153A true CN110798153A (en) | 2020-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911099692.9A Pending CN110798153A (en) | 2019-11-12 | 2019-11-12 | Radio frequency front-end analog compensation circuit |
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| CN (1) | CN110798153A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824445A (en) * | 2021-09-29 | 2021-12-21 | 天津津航计算技术研究所 | DAC output self-adaptive calibration method under wide temperature environment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215358B1 (en) * | 1999-09-16 | 2001-04-10 | Samsung Electronics Co., Ltd. | Temperature compensated bias network for a power amplifier and method of operation |
| CN101394151A (en) * | 2008-10-14 | 2009-03-25 | 福建先创电子有限公司 | Automatic gain compensation and linear control method and device for power amplifier |
| CN202444489U (en) * | 2012-01-17 | 2012-09-19 | 深圳国人通信有限公司 | Repeater and power amplifier apparatus thereof |
| CN103209016A (en) * | 2012-01-17 | 2013-07-17 | 深圳国人通信有限公司 | Repeater and power amplifier thereof |
| CN205039781U (en) * | 2015-11-06 | 2016-02-17 | 深圳市华乾科技有限公司 | Biasing temperature compensated equipment of LDMOS RF power amplifier tube |
| CN106160733A (en) * | 2016-08-15 | 2016-11-23 | 南开大学 | N rank voltage generation circuit and temperature compensating crystal oscillator circuit |
-
2019
- 2019-11-12 CN CN201911099692.9A patent/CN110798153A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215358B1 (en) * | 1999-09-16 | 2001-04-10 | Samsung Electronics Co., Ltd. | Temperature compensated bias network for a power amplifier and method of operation |
| CN101394151A (en) * | 2008-10-14 | 2009-03-25 | 福建先创电子有限公司 | Automatic gain compensation and linear control method and device for power amplifier |
| CN202444489U (en) * | 2012-01-17 | 2012-09-19 | 深圳国人通信有限公司 | Repeater and power amplifier apparatus thereof |
| CN103209016A (en) * | 2012-01-17 | 2013-07-17 | 深圳国人通信有限公司 | Repeater and power amplifier thereof |
| CN205039781U (en) * | 2015-11-06 | 2016-02-17 | 深圳市华乾科技有限公司 | Biasing temperature compensated equipment of LDMOS RF power amplifier tube |
| CN106160733A (en) * | 2016-08-15 | 2016-11-23 | 南开大学 | N rank voltage generation circuit and temperature compensating crystal oscillator circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824445A (en) * | 2021-09-29 | 2021-12-21 | 天津津航计算技术研究所 | DAC output self-adaptive calibration method under wide temperature environment |
| CN113824445B (en) * | 2021-09-29 | 2023-07-28 | 天津津航计算技术研究所 | DAC output self-adaptive calibration method in wide temperature environment |
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