CN207472956U - A kind of signal conditioning circuit for rf power measurement - Google Patents
A kind of signal conditioning circuit for rf power measurement Download PDFInfo
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- CN207472956U CN207472956U CN201721706436.8U CN201721706436U CN207472956U CN 207472956 U CN207472956 U CN 207472956U CN 201721706436 U CN201721706436 U CN 201721706436U CN 207472956 U CN207472956 U CN 207472956U
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- differential amplifier
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Abstract
The utility model discloses a kind of signal conditioning circuit for rf power measurement, including impedance matching circuit, radio frequency stepping circuit, detecting circuit, direct current stepping circuit and differential amplifier circuit；Wherein, the radiofrequency signal of input obtains corresponding impedance matching by impedance matching circuit, radio frequency stepping circuit carries out radiofrequency signal different degrees of attenuation by switching different branches, radiofrequency signal is converted into direct current signal by detecting circuit, differential amplifier circuit carries out direct current signal the enhanced processing of certain multiple, and the amplification factor of differential amplifier circuit is controlled by the direct current stepping circuit and switched.Therefore, when the signal conditioning circuit of the utility model is applied in rf power measurement instrument, it is capable of providing wider range of dynamic measurement.
Description
Technical field
The utility model is related to electronic circuit technology fields, more particularly to a kind of signal condition for rf power measurement
Circuit.
Background technology
At present, radio-frequency technique has been widely used in the fields such as electronic countermeasure, electronic communication and aerospace, and existing
Rf power measurement instrument it is complicated, volume is big, inconvenient to carry, and some portable rf power measurement instruments
Due to volumetric constraint, it is limited to provide range of dynamic measurement.Therefore, it is necessary to rf power measurement apparatus structure is optimized,
Portability is promoted, and wider range of dynamic measurement is provided.
Utility model content
The purpose of the utility model is to overcome the above-mentioned deficiencies in the presence of the prior art, provide a kind of for radio frequency work(
The signal conditioning circuit that rate measures, is capable of providing wider range of dynamic measurement.
In order to realize above-mentioned purpose of utility model, the utility model provides following technical scheme：
A kind of signal conditioning circuit for rf power measurement, including impedance matching circuit, radio frequency stepping circuit, inspection
Wave circuit, direct current stepping circuit and differential amplifier circuit；Wherein, the radiofrequency signal of input is obtained by the impedance matching circuit
Corresponding impedance matching, the radio frequency stepping circuit carry out radiofrequency signal different degrees of decline by switching different branches
Subtract, radiofrequency signal is converted into direct current signal by the detecting circuit, and the differential amplifier circuit carries out direct current signal certain times
Several enhanced processings, and the amplification factor of the differential amplifier circuit is controlled by the direct current stepping circuit and switched.
According to a kind of specific embodiment, the utility model is used in the signal conditioning circuit of rf power measurement, institute
Radio frequency stepping circuit is stated with a plurality of branch, and every branch has different impedance operators, and pass through corresponding controlled switch
It is connect with RF signal input end.
According to a kind of specific embodiment, the utility model is used in the signal conditioning circuit of rf power measurement, institute
Direct current stepping circuit is stated with a plurality of branch, and every branch road sets the resistance of different resistance values, and passes through controlled accordingly open
Pass is connect with RF signal input end.
Further, feedback of the resistance of each road of the direct current stepping circuit as the differential amplifier circuit
Resistance.
Compared with prior art, the beneficial effects of the utility model：
The utility model includes impedance matching circuit, radio frequency stepping electricity for the signal conditioning circuit of rf power measurement
Road, detecting circuit, direct current stepping circuit and differential amplifier circuit；Wherein, the radiofrequency signal of input is obtained by impedance matching circuit
Corresponding impedance matching is obtained, radio frequency stepping circuit carries out radiofrequency signal different degrees of decline by switching different branches
Subtract, radiofrequency signal is converted into direct current signal by detecting circuit, and differential amplifier circuit carries out direct current signal the amplification of certain multiple
Processing, and the amplification factor of differential amplifier circuit is controlled by the direct current stepping circuit and switched.Therefore, the letter of the utility model
When number modulate circuit is applied in rf power measurement instrument, it is capable of providing wider range of dynamic measurement.
Description of the drawings：
Fig. 1 is the structure diagram of the utility model signal conditioning circuit；
Fig. 2 is the electricity that the utility model signal conditioning circuit includes impedance matching circuit, radio frequency stepping circuit, detecting circuit
Lu Tu；
Fig. 3 is the circuit diagram that the utility model signal conditioning circuit includes direct current stepping circuit and differential amplifier circuit.
Specific embodiment
The utility model is described in further detail with reference to test example and specific embodiment.It but should not be by this
The range for being interpreted as the above-mentioned theme of the utility model is only limitted to following embodiment, all to be realized based on the utility model content
Technology belongs to the scope of the utility model.
With reference to the structure diagram of the utility model signal conditioning circuit shown in FIG. 1；Wherein, the utility model is used to penetrate
The signal conditioning circuit of frequency power measurement include impedance matching circuit, radio frequency stepping circuit, detecting circuit, direct current stepping circuit and
Differential amplifier circuit.
Wherein, the radiofrequency signal of input obtains corresponding impedance matching by impedance matching circuit, and radio frequency stepping circuit leads to
It crosses and switches different branches and different degrees of attenuation is carried out to radiofrequency signal, radiofrequency signal is converted into direct current by detecting circuit to be believed
Number, differential amplifier circuit to direct current signal carry out certain multiple enhanced processing, and the amplification factor of differential amplifier circuit by
The direct current stepping circuit control switching.
Specifically, the radio frequency stepping circuit has a plurality of branch, and every branch has different impedance operators, and lead to
Corresponding controlled switch is crossed to connect with RF signal input end.The direct current stepping circuit has a plurality of branch, and every branch
It is upper that the resistance of different resistance values is set, and pass through corresponding controlled switch and connect with RF signal input end.It is described straight when implementing
Feedback resistance of the resistance of each road of flow point shelves circuit as the differential amplifier circuit.
With reference to Fig. 2 and circuit diagram shown in Fig. 3；Wherein, in order to improve measurement dynamic range index, before detection, pass through
Radio frequency stepping circuit carries out stepping to radiofrequency signal, which is divided into third gear, i.e. three branches, wherein first
Grade circuit is unattenuated, and second level circuit is made of R7, R12, R13, and to a certain degree, tertiary circuit is on the basis of the second level for attenuation
It is made of, then decays to a certain degree R15, R17, R18.Radiofrequency signal is passed through any one in detector diode D1, D2 and D3 and is turned
Become direct current signal, further, second of stepping processing is carried out to direct current signal, the feedback resistance by controlling amplifier is big
Small, R9, R10, amplification quantity is 10 times, 100 times, 1000 times to R11 successively.It is used in radio frequency stepping circuit and direct current stepping circuit
Controlled switch N1B, N1C, N1D, N1E and N1F can carry out centralized Control by same integrated switch chip, thus by radio frequency stepping
Circuit and direct current stepping circuit control together, provide a variety of different gears, and choose gear as needed and signal is put
Greatly, to meet measurement demand.
Claims (4)
1. a kind of signal conditioning circuit for rf power measurement, which is characterized in that including impedance matching circuit, radio frequency stepping
Circuit, detecting circuit, direct current stepping circuit and differential amplifier circuit；Wherein, the radiofrequency signal of input passes through the impedance matching
Circuit obtains corresponding impedance matching, and the radio frequency stepping circuit carries out radiofrequency signal by switching different branches different
Radiofrequency signal is converted into direct current signal by the attenuation of degree, the detecting circuit, the differential amplifier circuit to direct current signal into
The enhanced processing of row certain multiple, and the amplification factor of the differential amplifier circuit is cut by direct current stepping circuit control
It changes.
2. it to be used for the signal conditioning circuit of rf power measurement as described in claim 1, which is characterized in that the radio frequency stepping
Circuit has a plurality of branch, and every branch has different impedance operators, and pass through corresponding controlled switch and radiofrequency signal
Input terminal connects.
3. it to be used for the signal conditioning circuit of rf power measurement as described in claim 1, which is characterized in that the direct current stepping
Circuit has a plurality of branch, and every branch road sets the resistance of different resistance values, and passes through corresponding controlled switch and believe with radio frequency
The connection of number input terminal.
4. it to be used for the signal conditioning circuit of rf power measurement as claimed in claim 3, which is characterized in that the direct current stepping
Feedback resistance of the resistance of each road of circuit as the differential amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721706436.8U CN207472956U (en) | 2017-12-08 | 2017-12-08 | A kind of signal conditioning circuit for rf power measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721706436.8U CN207472956U (en) | 2017-12-08 | 2017-12-08 | A kind of signal conditioning circuit for rf power measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207472956U true CN207472956U (en) | 2018-06-08 |
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ID=62257536
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721706436.8U Active CN207472956U (en) | 2017-12-08 | 2017-12-08 | A kind of signal conditioning circuit for rf power measurement |
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| CN (1) | CN207472956U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843766A (en) * | 2017-12-08 | 2018-03-27 | 成都前锋电子仪器有限责任公司 | A kind of signal conditioning circuit for rf power measurement |
-
2017
- 2017-12-08 CN CN201721706436.8U patent/CN207472956U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843766A (en) * | 2017-12-08 | 2018-03-27 | 成都前锋电子仪器有限责任公司 | A kind of signal conditioning circuit for rf power measurement |
| CN107843766B (en) * | 2017-12-08 | 2024-01-30 | 成都前锋电子仪器有限责任公司 | Signal conditioning circuit for radio frequency power measurement |
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