CN114113772A - Power detection circuit structure for eliminating temperature drift error - Google Patents
Power detection circuit structure for eliminating temperature drift error Download PDFInfo
- Publication number
- CN114113772A CN114113772A CN202111387228.7A CN202111387228A CN114113772A CN 114113772 A CN114113772 A CN 114113772A CN 202111387228 A CN202111387228 A CN 202111387228A CN 114113772 A CN114113772 A CN 114113772A
- Authority
- CN
- China
- Prior art keywords
- resistor
- resistance
- circuit structure
- operational amplifier
- detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention relates to a power detection circuit structure for eliminating temperature drift errors, which comprises an operational amplifier, a first detector, a second detector, a first resistor, a second resistor, a third resistor and a fourth resistor, wherein the anode of the first detector is connected with a reference power source, the cathode of the first detector is connected with the inverting input end of the operational amplifier through the first resistor, the anode of the second detector is connected with an input signal, the cathode of the second detector is connected with the non-inverting input end of the operational amplifier through the second resistor, the third resistor is connected between the inverting input end and the output end of the operational amplifier, one end of the fourth resistor is connected with the non-inverting input end of the operational amplifier, and the other end of the fourth resistor is grounded. The power detection circuit structure for eliminating the temperature drift error is adopted, the mode of circuit sampling difference mode detection is utilized, and the difference is calculated through the difference, so that the power detection error caused by the detection device is eliminated, and the method is simple and easy to operate.
Description
Technical Field
The invention relates to the field of radio frequency instruments, in particular to the field of power detection of radio frequency signals, and specifically relates to a power detection circuit structure for eliminating temperature drift errors.
Background
In the integration of a radio frequency system, for example, in a radio frequency instrument, power detection needs to be performed on a radio frequency signal, and detection modes generally include detection by a detection tube, a logarithmic detector and the like, so that power information is converted into voltage information. However, the detected voltage changes even if the power does not change due to a change in the operating temperature, which is a so-called temperature drift error. This temperature drift error is introduced due to the temperature-dependent nature of the detector device itself. To eliminate or reduce this error, it is common practice to perform a temperature calibration, which is eliminated or reduced in the manner of a look-up table. Thus, the complexity of the method is greatly improved, and the resource consumption is also greatly increased.
FIG. 1 is a schematic diagram of a conventional single-ended detector circuit, VdetIs the detected voltage of the input signal. When the temperature changes, the detection output voltage can drift due to the temperature drift characteristic of the detection device, namely Vdet+ Δ V, the same input power appears at a different output voltage. Thus, temperature drift errors occur.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a power detection circuit structure which has the advantages of high accuracy, simple and convenient operation and wide application range and can eliminate temperature drift errors.
In order to achieve the above object, the power detector circuit according to the present invention for eliminating a temperature drift error has the following configuration:
the power detection circuit structure for eliminating the temperature drift error is mainly characterized by comprising an operational amplifier, a first detection device, a second detection device, a first resistor, a second resistor, a third resistor and a fourth resistor, wherein the positive electrode of the first detection device is connected with a reference power source, the negative electrode of the first detection device is connected with the inverting input end of the operational amplifier through the first resistor, the positive electrode of the second detection device is connected with an input signal, the negative electrode of the second detection device is connected with the non-inverting input end of the operational amplifier through the second resistor, the third resistor is connected between the inverting input end and the output end of the operational amplifier, one end of the fourth resistor is connected with the non-inverting input end of the operational amplifier, and the other end of the fourth resistor is grounded.
Preferably, the first detector device and the second detector device have the same circuit structure.
Preferably, the circuit structure obtains the output voltage of the circuit according to the following formula, specifically:
wherein, VrefAs a detection voltage of a reference power source, VdetIs the detected voltage of the input signal, R1Is the resistance value of the first resistor, R2Is the resistance value of the second resistor, R3Is the resistance value of the third resistor, R4Is the resistance of the fourth resistor.
Preferably, in the circuit structure, when the resistance values of the first resistor, the second resistor, the third resistor and the fourth resistor are the same, the output voltage of the circuit is obtained according to the following formula, specifically:
Vout＝Vdet-Vref；
wherein, VrefAs a detection voltage of a reference power source, VdetIs the detected voltage of the input signal.
The power detection circuit structure for eliminating the temperature drift error is adopted, the traditional single-ended detection mode is replaced by the circuit sampling differential detection mode, and the difference is calculated through the difference, so that the power detection error caused by the detection device is eliminated. The method is simple and easy to operate, and does not need software resources.
Drawings
FIG. 1 is a schematic diagram of a prior art single-ended detector circuit.
FIG. 2 is a schematic diagram of a differential detector circuit implementing the power detector circuit architecture for eliminating temperature drift errors of the present invention.
Detailed Description
In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.
The power detection circuit structure for eliminating the temperature drift error comprises an operational amplifier, a first detector, a second detector, a first resistor, a second resistor, a third resistor and a fourth resistor, wherein the anode of the first detector is connected with a reference power source, the cathode of the first detector is connected with the inverting input end of the operational amplifier through the first resistor, the anode of the second detector is connected with an input signal, the cathode of the second detector is connected with the non-inverting input end of the operational amplifier through the second resistor, the third resistor is connected between the inverting input end and the output end of the operational amplifier, one end of the fourth resistor is connected with the non-inverting input end of the operational amplifier, and the other end of the fourth resistor is grounded.
In a preferred embodiment of the present invention, the first and second detection devices have the same circuit structure.
As a preferred embodiment of the present invention, the circuit structure obtains the output voltage of the circuit according to the following formula, specifically:
wherein, VrefAs a detection voltage of a reference power source, VdetIs the detected voltage of the input signal, R1Is the resistance value of the first resistor, R2Is the resistance value of the second resistor, R3Is the resistance value of the third resistor, R4Is the resistance of the fourth resistor.
As a preferred embodiment of the present invention, in the circuit structure, when the resistance values of the first resistor, the second resistor, the third resistor and the fourth resistor are the same, the output voltage of the circuit is obtained according to the following formula, specifically:
Vout＝Vdet-Vref；
wherein, VrefAs a detection voltage of a reference power source, VdetIs the detected voltage of the input signal.
In the prior art, the actual attenuation value of the numerical control attenuator has errors from the value given by the manual, so that the data in the fitting of the non-calibration point contains the errors.
In the specific implementation mode of the invention, the invention discloses a power detection circuit for eliminating temperature drift, which eliminates fitting errors caused by uncertainty of a numerical control attenuator when fitting the power of a non-calibrated frequency point in the process of calibrating the power of a radio frequency signal source, and improves the accuracy of fitting the power of the non-calibrated frequency point.
In order to eliminate or reduce this error, an inventive differential detector circuit is designed as shown in fig. 2.
As shown in fig. 2, the differential detection circuit of the present invention eliminates or reduces errors of the existing circuit.
VrefAs a detection voltage of a reference power source, VdetIs the detected voltage of the input signal. Obtaining the following through an operational amplifier subtraction circuit:
when R is1＝R2＝R3＝R4When Vout is equal to Vdet-Vref。
Thus, the power of the input signal can be estimated from Vout.
How the output voltage Vout changes when the temperature changes is analyzed by the specific embodiment of the present invention:
when the temperature changes, the detection output voltage of the input signal will drift due to the temperature drift characteristic of the detection device, i.e. Vdet+ Δ V, however, since the two detectors have the same type and are considered to have the same temperature drift characteristics, the detection voltage of the reference power source will drift, and V will beref+ Δ V, then
Vout＝(Vdet+ΔV)-(Vref-ΔV)＝Vdet-Vref
And the error introduced by the temperature drift of the single device is eliminated by subtraction.
The idea is similar to that of a differential circuit to eliminate common-mode interference and is very ingenious.
The power detection circuit structure for eliminating the temperature drift error is adopted, the traditional single-ended detection mode is replaced by the circuit sampling differential detection mode, and the difference is calculated through the difference, so that the power detection error caused by the detection device is eliminated. The method is simple and easy to operate, and does not need software resources.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (4)
1. The utility model provides a realize eliminating power detection circuit structure of temperature drift error, its characterized in that, circuit structure include operational amplifier, first demodulator device, second demodulator device, first resistance, second resistance, third resistance and fourth resistance, the positive pole of first demodulator device link to each other with the reference power source, the negative pole links to each other with operational amplifier's inverting input end through first resistance, the positive pole of second demodulator device link to each other with input signal, the negative pole links to each other with operational amplifier's positive phase input end through the second resistance, third resistance connect between operational amplifier's inverting input end and output, fourth resistance one end link to each other with operational amplifier's positive phase input end, the other end ground connection.
2. The power detector circuit arrangement for canceling temperature drift error of claim 1, wherein said first detector device and said second detector device are identical in circuit configuration.
3. The power detector circuit structure for eliminating temperature drift error according to claim 1, wherein the circuit structure obtains the output voltage of the circuit according to the following formula:
wherein, VrefAs a detection voltage of a reference power source, VdetIs the detected voltage of the input signal, R1Is the resistance value of the first resistor, R2Is the resistance value of the second resistor, R3Is the resistance value of the third resistor, R4Is the resistance of the fourth resistor.
4. The power detection circuit structure for eliminating temperature drift error according to claim 3, wherein the circuit structure obtains the output voltage of the circuit according to the following formula when the resistances of the first resistor, the second resistor, the third resistor and the fourth resistor are the same, specifically:
Vout＝Vdet-Vref；
wherein, VrefAs a detection voltage of a reference power source, VdetIs the detected voltage of the input signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387228.7A CN114113772A (en) | 2021-11-22 | 2021-11-22 | Power detection circuit structure for eliminating temperature drift error |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387228.7A CN114113772A (en) | 2021-11-22 | 2021-11-22 | Power detection circuit structure for eliminating temperature drift error |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114113772A true CN114113772A (en) | 2022-03-01 |
Family
ID=80439231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111387228.7A Pending CN114113772A (en) | 2021-11-22 | 2021-11-22 | Power detection circuit structure for eliminating temperature drift error |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114113772A (en) |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4320818A1 (en) * | 1993-06-23 | 1995-01-05 | Leybold Ag | Measuring amplifier |
| CN1167535A (en) * | 1994-09-30 | 1997-12-10 | 艾利森电话股份有限公司 | Temperature compensated logarithmic convertor |
| JPH11257908A (en) * | 1998-03-12 | 1999-09-24 | Chuo Spring Co Ltd | Electromagnetic induction type sensor |
| JP2000295054A (en) * | 1999-04-12 | 2000-10-20 | Fujitsu Ltd | Output power control circuit and transmission circuit |
| US6430403B1 (en) * | 1999-06-10 | 2002-08-06 | Lucent Technologies Inc. | Temperature compensated, zero bias RF detector circuit |
| US6472860B1 (en) * | 2000-03-21 | 2002-10-29 | Nokia Networks Oy | Compensated RF power detector |
| CN201146482Y (en) * | 2007-11-15 | 2008-11-05 | 中兴通讯股份有限公司 | Circuit for detecting radio frequency power |
| CN101807881A (en) * | 2010-02-01 | 2010-08-18 | 南京紫淮矿用电子高科技有限公司 | Temperature compensation voltage-multiplying diode detector for ultrahigh frequency band |
| EP2244379A1 (en) * | 2009-04-23 | 2010-10-27 | Alcatel Lucent | Method for preventing impacts by a power detector on a signal path of an RF circuit, device, power amplifier system, and network element thereof |
| US20120008669A1 (en) * | 2010-07-07 | 2012-01-12 | Kabushiki Kaisha Toshiba | Power detector and wireless device |
| US8744379B1 (en) * | 2012-12-31 | 2014-06-03 | Futurewei Technologies, Inc. | Temperature independent CMOS radio frequency power detector |
| CN104076859A (en) * | 2014-06-30 | 2014-10-01 | 成都赛英科技有限公司 | Microwave temperature compensation detector |
| CN104460817A (en) * | 2014-10-10 | 2015-03-25 | 中国电子科技集团公司第四十一研究所 | High-stability power control circuit and method for common-mode temperature compensation demodulation |
| CN105137169A (en) * | 2015-09-25 | 2015-12-09 | 华中科技大学 | Radio-frequency power detection circuit |
| CN204989498U (en) * | 2015-04-16 | 2016-01-20 | 漳州市东方智能仪表有限公司 | Mirror image difference formula underground metal detector |
| CN105791812A (en) * | 2014-12-24 | 2016-07-20 | 北京同方吉兆科技有限公司 | Digital television transmitter broadband detection implementation system and method |
| CN205484545U (en) * | 2016-01-17 | 2016-08-17 | 西安科技大学 | RF power detector circuit with temperature compensation function |
| US20170160318A1 (en) * | 2015-12-08 | 2017-06-08 | Skyworks Solutions, Inc. | Wide dynamic range broadband current mode linear detector circuits for high power radio frequency power amplifier |
| CN206311663U (en) * | 2016-12-23 | 2017-07-07 | 成都国卫通信技术有限公司 | A kind of device for detecting power of radio frequency |
| CN107102301A (en) * | 2017-03-28 | 2017-08-29 | 石家庄信科微波技术有限公司 | A kind of novel microwave power precision Control Technology |
| CN110850159A (en) * | 2019-11-26 | 2020-02-28 | 中电科仪器仪表有限公司 | Device for reducing influence of temperature on diode detector |
-
2021
- 2021-11-22 CN CN202111387228.7A patent/CN114113772A/en active Pending
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4320818A1 (en) * | 1993-06-23 | 1995-01-05 | Leybold Ag | Measuring amplifier |
| CN1167535A (en) * | 1994-09-30 | 1997-12-10 | 艾利森电话股份有限公司 | Temperature compensated logarithmic convertor |
| JPH11257908A (en) * | 1998-03-12 | 1999-09-24 | Chuo Spring Co Ltd | Electromagnetic induction type sensor |
| JP2000295054A (en) * | 1999-04-12 | 2000-10-20 | Fujitsu Ltd | Output power control circuit and transmission circuit |
| US6430403B1 (en) * | 1999-06-10 | 2002-08-06 | Lucent Technologies Inc. | Temperature compensated, zero bias RF detector circuit |
| US6472860B1 (en) * | 2000-03-21 | 2002-10-29 | Nokia Networks Oy | Compensated RF power detector |
| CN201146482Y (en) * | 2007-11-15 | 2008-11-05 | 中兴通讯股份有限公司 | Circuit for detecting radio frequency power |
| EP2244379A1 (en) * | 2009-04-23 | 2010-10-27 | Alcatel Lucent | Method for preventing impacts by a power detector on a signal path of an RF circuit, device, power amplifier system, and network element thereof |
| CN101807881A (en) * | 2010-02-01 | 2010-08-18 | 南京紫淮矿用电子高科技有限公司 | Temperature compensation voltage-multiplying diode detector for ultrahigh frequency band |
| US20120008669A1 (en) * | 2010-07-07 | 2012-01-12 | Kabushiki Kaisha Toshiba | Power detector and wireless device |
| US8744379B1 (en) * | 2012-12-31 | 2014-06-03 | Futurewei Technologies, Inc. | Temperature independent CMOS radio frequency power detector |
| CN104076859A (en) * | 2014-06-30 | 2014-10-01 | 成都赛英科技有限公司 | Microwave temperature compensation detector |
| CN104460817A (en) * | 2014-10-10 | 2015-03-25 | 中国电子科技集团公司第四十一研究所 | High-stability power control circuit and method for common-mode temperature compensation demodulation |
| CN105791812A (en) * | 2014-12-24 | 2016-07-20 | 北京同方吉兆科技有限公司 | Digital television transmitter broadband detection implementation system and method |
| CN204989498U (en) * | 2015-04-16 | 2016-01-20 | 漳州市东方智能仪表有限公司 | Mirror image difference formula underground metal detector |
| CN105137169A (en) * | 2015-09-25 | 2015-12-09 | 华中科技大学 | Radio-frequency power detection circuit |
| US20170160318A1 (en) * | 2015-12-08 | 2017-06-08 | Skyworks Solutions, Inc. | Wide dynamic range broadband current mode linear detector circuits for high power radio frequency power amplifier |
| CN205484545U (en) * | 2016-01-17 | 2016-08-17 | 西安科技大学 | RF power detector circuit with temperature compensation function |
| CN206311663U (en) * | 2016-12-23 | 2017-07-07 | 成都国卫通信技术有限公司 | A kind of device for detecting power of radio frequency |
| CN107102301A (en) * | 2017-03-28 | 2017-08-29 | 石家庄信科微波技术有限公司 | A kind of novel microwave power precision Control Technology |
| CN110850159A (en) * | 2019-11-26 | 2020-02-28 | 中电科仪器仪表有限公司 | Device for reducing influence of temperature on diode detector |
Non-Patent Citations (5)
| Title |
|---|
| CHAO YANG 等: "Research and Exploration on Voltage Detection Technology for Electricity Stealing and Omission", 2021 IEEE ASIA-PACIFIC CONFERENCE ON IMAGE PROCESSING, ELECTRONICS AND COMPUTERS (IPEC), 7 May 2021 (2021-05-07) * |
| 徐达旺 等: "二极管式微波功率检波器的温度补偿技术", 电子测量技术, 30 December 2006 (2006-12-30) * |
| 景洪;曹卫平;李治国;杨猛;张强;: "X波段检波组件灵敏度测量不确定度分析", 计量与测试技术, no. 07, 30 July 2011 (2011-07-30) * |
| 赵明华 等: "S波段温度补偿线性检波器", 2005全国微波毫米波会议论文集（第二册）, 27 February 2006 (2006-02-27) * |
| 高欢: "电化学检波器的温度特性及补偿方法研究", 中国优秀硕士学位论文全文数据库 基础科学辑, 15 August 2020 (2020-08-15) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016179964A1 (en) | Detection circuit and detection method for high-side current | |
| CN106998194B (en) | Envelope detector with high input impedance | |
| US3982241A (en) | Self-zeroing analog-to-digital conversion system | |
| CN105259528B (en) | A kind of the internal calibration circuit and calibration method of microwave power probe | |
| KR101056003B1 (en) | Extended Range RMS-DC Converters | |
| US20120034895A1 (en) | Circuit and Method for Peak Detection with Hysteresis | |
| US9354260B2 (en) | Wideband CMOS RMS power detection system | |
| CA2589911A1 (en) | Amplifier system with current-mode servo feedback | |
| TW201306630A (en) | Squaring circuit, integrated circuit, wireless communication unit and method therefor | |
| CN109654125B (en) | Displacement correction device, magnetic suspension bearing system and displacement correction method thereof | |
| CN101944886B (en) | Adaptive micro-current amplifier | |
| US20220247372A1 (en) | Current sensing circuitry | |
| CN101286961B (en) | Correcting device and method for direct current off-set outputted by equipment | |
| CN116243048A (en) | Voltage detection method, circuit, equipment and storage medium | |
| JPH04212067A (en) | Dual-path wide-band high-precision data collecting system | |
| US7436165B2 (en) | Device for measuring very short current pulses | |
| CN117630624A (en) | Temperature measuring circuit and method for power chip | |
| CN114113772A (en) | Power detection circuit structure for eliminating temperature drift error | |
| CN109596874B (en) | Impedance transformation circuit with enhanced driving capability | |
| CN116577714A (en) | Detector calibration circuit, method, control unit, storage medium, and program product | |
| JP2003050270A (en) | Output correction method of magnetic sensor and its correction circuit | |
| WO2022048276A1 (en) | Offset voltage correction circuit and offset voltage correction method | |
| CN219328889U (en) | Analog circuit with automatic zero setting function and oscilloscope | |
| US11601206B2 (en) | Transmit-signal strength indicator circuit and transmitting circuit | |
| US4495462A (en) | Current source test circuitry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |