CN103869150B - A kind of radio-frequency measurement device and temperature compensation with temperature compensation function - Google Patents
A kind of radio-frequency measurement device and temperature compensation with temperature compensation function Download PDFInfo
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- CN103869150B CN103869150B CN201210530320.9A CN201210530320A CN103869150B CN 103869150 B CN103869150 B CN 103869150B CN 201210530320 A CN201210530320 A CN 201210530320A CN 103869150 B CN103869150 B CN 103869150B
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Abstract
The invention discloses a kind of radio-frequency measurement device with temperature compensation function, including PCB, and the radio-frequency signal path being arranged in PCB and the peak detector to radio-frequency signal path progress detection, in addition to：Temperature sensor, DAC control units and grounding resistance；Temperature sensor is set adjacent to the peak detector, for detecting the environment temperature of peak detector and being converted into detection voltage；Grounding resistance is set adjacent to peak detector, and is connected with DAC control units；DAC control units, for the environment temperature of the peak detector detected according to temperature sensor, control the electric current of grounding resistance.The radio-frequency measurement device and temperature compensation with temperature compensation function of the embodiment of the present invention, keep detecting circuit and ambient temperature constant using temperature sensor and grounding resistance, the error that detecting circuit is brought when solving temperature change, simplify calibration program, prover time is shortened, reduces the production cost of product.
Description
Technical field
The present invention relates to measurement, technical field of measurement and test, more particularly to the radio-frequency measurement device of radio-frequency signal source, concretely
It is a kind of radio-frequency measurement device and temperature compensation with temperature compensation function.
Background technology
The detecting circuit of radio-frequency signal source is typically designed using low barrier Schottky diode, is made using the rectification of diode
Direct current signal is converted into radio-frequency alternating current signal.This detecting circuit is commonly used to the auto level control electricity in signal source
In road or in the tracking source follower circuit of spectrum analyzer.
Fig. 1 is the block diagram of the automatic level control circuit 10 in radio-frequency signal source of the prior art.Such as Fig. 1 institutes
Show, the automatic level control circuit 10 include variable attenuator 101, amplifier 102, coupler 103, peak detector 104,
Comparator 105 and DAC-circuit 106, radio-frequency signal source carry out frequency synthesis and obtain required frequency signal first, then will
Radiofrequency signal is sent to variable attenuator 101, and the signal for obtaining an amplitude and fixing is handled by automatic level control circuit 10,
Then attenuation units are then forwarded to（It is different from above-mentioned variable attenuator）Carry out amplitude adjusted.In Fig. 1, coupler 103 will
The radiofrequency signal of amplifier output is coupled in the branch road of peak detector 104, is obtained by the power of the basis signal of peak detector 104
To voltage, then compared with the voltage that DAC-circuit 106 gives, and can to control according to the voltage difference that comparator 105 obtains
Become attenuator 101 so that the power of the signal of the final output of automatic level control circuit 10 reaches stable state.
However, because peak detector is easily affected by temperature, i.e., temperature change when, the electricity of peak detector output
Pressure will change, so as to cause the power output of automatic level control circuit to change, therefore, it is necessary at different temperatures to inspection
Wave circuit is calibrated, to ensure amplitude exact value when in whole operating temperature range.
But this method is more complicated, not only loses time, and add the production cost of product.
The content of the invention
The invention aims to overcome, the radio-frequency measurement device comprising detecting circuit can be because present in prior art
The deficiency of detection error is brought for temperature change, there is provided a kind of with the radio-frequency measurement device of temperature compensation function and temperature-compensating
Method, to keep the temperature of detecting circuit in radio-frequency measurement device and surrounding environment constant.
In order to achieve the above object, the embodiment of the invention discloses a kind of radio-frequency measurement dress with temperature compensation function
Put, including PCB, and the radio-frequency signal path that is arranged in the PCB and to the radio-frequency signal path
The peak detector of detection is carried out, the radio-frequency measurement device also includes：Temperature sensor, DAC control units and ground connection electricity
Resistance；The temperature sensor is set adjacent to the peak detector, for detecting the environment temperature of the peak detector and inciting somebody to action
It is converted to detection voltage；The grounding resistance is set adjacent to the peak detector, and is connected with the DAC control units
Connect；The DAC control units, for the environment temperature of the peak detector detected according to the temperature sensor, control
Make the electric current of the grounding resistance.
In order to achieve the above object, the embodiment of the invention also discloses a kind of temperature compensation of radio-frequency measurement device,
Including：The environment temperature of temperature sensor detection peak detector simultaneously generates detection voltage；By the detection voltage and default electricity
Pressure is compared, and generates comparison voltage；The comparison voltage is added on grounding resistance, controls the electric current of the grounding resistance.
The radio-frequency measurement device and temperature compensation with temperature compensation function of the embodiment of the present invention, are passed using temperature
Sensor and grounding resistance are constant to keep detecting circuit in radio-frequency measurement device and its ambient temperature, so as to solve temperature
The error that detecting circuit is brought during degree change, enormously simplify calibration program, shortens prover time, reduce the production of product
Cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those skilled in the art, without having to pay creative labor, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the block diagram of the automatic level control circuit in radio-frequency signal source of the prior art；
Fig. 2 is the knot in the temperature-compensating loop in the radio-frequency measurement device with temperature compensation function of the embodiment of the present invention
Structure schematic diagram；
Fig. 3 is temperature sensor, grounding resistance and the peak detector of embodiment illustrated in fig. 2 in the position of PCB
Schematic diagram；
Fig. 4 is the flow chart of the temperature compensation of the radio-frequency measurement device of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 2 is the knot in the temperature-compensating loop in the radio-frequency measurement device with temperature compensation function of the embodiment of the present invention
Structure schematic diagram.The radio-frequency measurement device with temperature compensation function in the embodiment of the present invention includes PCB, and sets
Radio-frequency signal path in the PCB and the peak detector to radio-frequency signal path progress detection.Wherein,
Signified radio-frequency signal path includes frequency synthesizer, automatic level control circuit and attenuation units in the embodiment of the present invention,
And automatic level control circuit includes variable attenuator, amplifier, coupler and the peak detector loop of input.When
So, in other embodiments, radio-frequency signal path can also be the tracking source follower circuit in spectrum analyzer.
Also, it will be appreciated by persons skilled in the art that PCB and radio-frequency signal path be conventional meanses and with
Prior art is identical, therefore, illustrate only the peak detector 1 of the progress temperature-compensating relevant with the present invention in fig. 2, and
Temperature-compensating loop with temperature compensation function.
As shown in Fig. 2 the radio-frequency measurement device of the embodiment of the present invention includes peak detector 1, temperature sensor 2, DAC controls
Unit 3 and grounding resistance 4 processed.The temperature sensor 2 is set adjacent to the peak detector 1, for detecting the peak value
The environment temperature of wave detector 1 is simultaneously converted into detection voltage；The grounding resistance 4 is set adjacent to the peak detector 1, and
It is connected with the DAC control units 3；Described in the DAC control units 3 are used to detecting according to the temperature sensor 2
The environment temperature of peak detector 1, control the electric current of the grounding resistance 4.
In the present embodiment, as shown in Fig. 2 DAC control units 3 include DAC-circuit 301 and comparator 302.The DAC
Circuit 301 is used to after the digital voltage of user's setting is converted into analog voltage input to the comparator 302；The comparator
302 receive the detection voltage that the analog voltage and the temperature sensor 2 transmit, and it is more electric that both are compared into generation
It is added to after pressure on the grounding resistance 4, controls the electric current of the grounding resistance 4.
Wherein, DAC control units 3 can be directly constituted by fpga chip, or be DSP devices etc..DAC-circuit 301 exports
User set magnitude of voltage as the reference voltage, with the temperature sensor 2 detection magnitude of voltage compared with.Normal conditions
Under, such as operating temperature is 0-40 DEG C, then when environment temperature is 40 DEG C of higher limit, DAC voltage output valve and temperature are set
The temperature detection output voltage values of sensor 2 approach so that the magnitude of voltage that comparator 302 exports is minimum, now leads on grounding resistance 4
The electric current crossed is also minimum, and the caloric value of resistance is by very little.
In the present embodiment, temperature sensor 2 can be diode.Negative temperature characteristic is had according to the PN junction of diode, temperature
Degree often raises once, and its forward voltage just reduces 3mv or so, therefore, can be come the change of detection temperature with diode.Certainly
The invention is not restricted to this, and the device of TEMP can also can be carried out with other come the change of detection temperature and generates detection electricity
Pressure.
In the present embodiment, the grounding resistance 4 can be one or more, and the neighbouring peak detector 1 is set.Ground connection
The comparison voltage that one end connection comparator 302 of resistance exports, the other end are directly grounded（It can be directly connected to PCB ground）.And
And the fixed requirement of the quantity of grounding resistance 4, its quantity is relevant with the peak power that each resistance can bear, when
, it is necessary to which the power that can bear of resistance is big when the temperature range of control is big；If selected resistance bears power limited, then just
Multiple resistance are needed to share jointly.According to resistance power consumption calculation formula P=U2/ R, if the R and U of each resistance are certain, that is just
It is that resistance is more, temperature control is more obvious.Set resistance can also, simply influence of the resistive dissipation effect to surrounding environment
It is smaller, it is necessary to which longer time obtains equalized temperature.In the present embodiment, it is right as shown in Fig. 2 grounding resistance is arranged to 4
Title is distributed in around peak detector 1 and temperature sensor 2.
In embodiments of the present invention, it is minimum using grounding resistance most convenient, cost.Certainly the invention is not restricted to this, also may be used
To be loaded with finished product（Internal and resistor network in fact）, but optimal mode is to use Chip-R, because the present invention will
PCB is added with it, if with leaded resistance, PCB temperature is influenceed to diminish.Also, each grounding resistance
Resistance size needs to be determined according to temperature controlling range, i.e., determined by the electric current of grounding resistance, is generally set in the present invention
For less than 200 ohm.
Fig. 3 is the temperature sensor 2 in embodiment illustrated in fig. 2, grounding resistance 4 and peak detector 1 in PCB
Position view.In the present embodiment, the temperature sensor 2 is separately positioned on the PCB circuits with the peak detector 1
The two sides of plate, and the temperature sensor 2 is located at the underface of the peak detector 1.Also, grounding resistance is 4, wherein
Two neighbouring peak detectors 1 are set, and positioned at the one side of the PCB, another two is adjacent to the temperature sensor 2
Set, positioned at the another side of the PCB, in upper and lower symmetrical structure.Certainly the invention is not restricted to this, temperature sensor 2
To be placed with the position of peak detector 1 according to the layout of actual PCB.Certainly, temperature sensor 2 and peak detection
Device 1 is nearer, and measured value is more accurate, specifically to regard and control the environment temperature of peak detector 1 in the range of what, it is also necessary to regard
Depending on the index request of the temperature characterisitic of peak detector 1 and the output power stability of whole circuit.
In embodiments of the present invention, in the surrounding of the peak detector 1, temperature sensor 2 and grounding resistance 4
Be further opened with groove in PCB, the groove be used for reducing around other circuits to the environment temperature of the peak detector
Influence.Dotted line frame is that peak detector 1, temperature sensor 2 and grounding resistance 4 need to slot on PCB periphery in Fig. 2
Position, the purpose of fluting are to be physically separated other circuits and this partial circuit in heat propagation, reduce other circuits pair
Temperature around peak detector 1 influences.The size of fluting with can put down peak detector 1, temperature sensor 2 and
Grounding resistance 4 is advisable.
It is described when in accordance with the above, using the radio-frequency measurement device with temperature compensation function of the embodiment of the present invention
Temperature sensor 2 detects the environment temperature of the peak detector 1, generation detection voltage, and will detect voltage and DAC electricity
The default analog voltage that road 301 exports is compared by comparator 302, and the grounding resistance is added in after generating comparison voltage
On 4, control so as to control the heating of resistance, and then the surrounding of peak detector 1 is controlled by the size of current of grounding resistance 4
In a stationary temperature.
Fig. 4 is the flow chart of the temperature compensation of the radio-frequency measurement device of the embodiment of the present invention.As illustrated, this implementation
The temperature compensation of the radio-frequency measurement device of example includes：
Step S101, the environment temperature of temperature sensor detection peak detector simultaneously generate detection voltage；Step S102, will
The detection voltage generates comparison voltage compared with predeterminated voltage；Step S103, the comparison voltage is added in ground connection electricity
In resistance, the electric current of the grounding resistance is controlled.
In step S101, the temperature sensor is diode.Negative temperature characteristic is had according to the PN junction of diode, temperature
Degree often raises once, and its forward voltage just reduces 3mv or so, therefore, can be come the change of detection temperature with diode.Certainly
The invention is not restricted to this, and the device of TEMP can also can be carried out with other come the change of detection temperature and generates detection electricity
Pressure.
In step s 102, the digital voltage that user sets is converted into analog voltage using DAC-circuit first, then
The detection voltage and analog voltage that are generated in step S101 are inputted to comparator together；Comparator receive the analog voltage and
The detection voltage of the temperature sensor transmission, and both are compared generation comparison voltage.
In step s 103, the comparison voltage generated in step S102 is added on grounding resistance, if step S102 gives birth to
Into comparing voltage value it is smaller, then the hot very little of resistance hair, will be reduced so as to environment temperature.
The radio-frequency measurement device and temperature compensation with temperature compensation function of the embodiment of the present invention, are passed using temperature
Sensor and grounding resistance are constant to keep detecting circuit in radio-frequency measurement device and its ambient temperature, so as to solve temperature
The error that detecting circuit is brought during degree change, enormously simplify calibration program, shortens prover time, reduce the production of product
Cost.
Particular embodiments described above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, the guarantor being not intended to limit the present invention
Scope is protected, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., should be included in this
Within the protection domain of invention.
Claims (10)
1. a kind of radio-frequency measurement device with temperature compensation function, including PCB, and it is arranged on the PCB circuits
Radio-frequency signal path on plate and the peak detector to radio-frequency signal path progress detection, it is characterised in that described to penetrate
Frequency measurement apparatus also includes：Temperature sensor, DAC control units and grounding resistance；
The temperature sensor is set adjacent to the peak detector, for detecting the environment temperature of the peak detector and inciting somebody to action
It is converted to detection voltage；
The grounding resistance is set adjacent to the peak detector, and is connected with the DAC control units；
The DAC control units, for the environment temperature of the peak detector detected according to the temperature sensor, control
Make the electric current of the grounding resistance.
2. there is the radio-frequency measurement device of temperature compensation function as claimed in claim 1, it is characterised in that the DAC controls
Unit includes DAC-circuit and comparator；
The DAC-circuit is used to after the digital voltage of user's setting is converted into analog voltage input to the comparator；
The comparator receives the analog voltage and the detection voltage of temperature sensor transmission, and both are compared
It is added to after generation comparison voltage on the grounding resistance, controls the electric current of the grounding resistance.
3. there is the radio-frequency measurement device of temperature compensation function as claimed in claim 1, it is characterised in that the TEMP
Device is diode.
4. there is the radio-frequency measurement device of temperature compensation function as claimed in claim 2, it is characterised in that the grounding resistance
Number be one or more, the neighbouring peak detector is set.
5. there is the radio-frequency measurement device of temperature compensation function as claimed in claim 4, it is characterised in that each ground connection
The resistance of sensor is less than 200 ohm.
6. there is the radio-frequency measurement device of temperature compensation function as claimed in claim 1, it is characterised in that the TEMP
Device is separately positioned on the two sides of the PCB with the peak detector, and the temperature sensor is located at the peak value
The underface of wave detector.
7. there is the radio-frequency measurement device of temperature compensation function as claimed in claim 6, it is characterised in that the grounding resistance
Number be 4, two of which is set adjacent to the peak detector, neighbouring positioned at the one side of the PCB, another two
The temperature sensor is set, positioned at the another side of the PCB.
8. the radio-frequency measurement device with temperature compensation function as any one of claim 1-7, it is characterised in that
Groove is further opened with the PCB of the surrounding of the peak detector, temperature sensor and grounding resistance, the groove is used for
Influence of other circuits to the environment temperature of the peak detector around reducing.
9. a kind of temperature compensation of radio-frequency measurement device, it is characterised in that methods described includes：
The environment temperature of temperature sensor detection peak detector simultaneously generates detection voltage；
By the detection voltage compared with predeterminated voltage, comparison voltage is generated；
The comparison voltage is added on grounding resistance, controls the electric current of the grounding resistance.
10. the temperature compensation of radio-frequency measurement device as claimed in claim 9, it is characterised in that the temperature sensor
For diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210530320.9A CN103869150B (en) | 2012-12-10 | 2012-12-10 | A kind of radio-frequency measurement device and temperature compensation with temperature compensation function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210530320.9A CN103869150B (en) | 2012-12-10 | 2012-12-10 | A kind of radio-frequency measurement device and temperature compensation with temperature compensation function |
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| CN103869150A CN103869150A (en) | 2014-06-18 |
| CN103869150B true CN103869150B (en) | 2018-03-16 |
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| CN105182049A (en) * | 2015-09-16 | 2015-12-23 | 湖南格兰德芯微电子有限公司 | Radio frequency signal peak detector |
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| CN102042832A (en) * | 2010-11-23 | 2011-05-04 | 东南大学 | Micro electro mechanical system (MEMS) gyroscope, chip level temperature control method thereof and processing method thereof |
| CN201867439U (en) * | 2010-08-04 | 2011-06-15 | 中国电力科学研究院 | Low-temperature working compensation device |
| CN102466751A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Current measuring apparatus |
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- 2012-12-10 CN CN201210530320.9A patent/CN103869150B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1676140A1 (en) * | 2003-10-21 | 2006-07-05 | Thales | Device for non-dissipative measurement of current in an inductive resistor |
| JP4249081B2 (en) * | 2004-05-10 | 2009-04-02 | 株式会社ケーヒン | Measuring device and temperature compensation method of measuring device |
| CN101841901A (en) * | 2009-12-30 | 2010-09-22 | 中国科学院电子学研究所 | Closed-loop automatic gain automatic control device and method for radio-frequency channel |
| CN201766557U (en) * | 2010-06-12 | 2011-03-16 | 深圳市国人射频通信有限公司 | Radio frequency (RF) power amplitude limiting circuit |
| CN201867439U (en) * | 2010-08-04 | 2011-06-15 | 中国电力科学研究院 | Low-temperature working compensation device |
| CN102466751A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Current measuring apparatus |
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