CN106154028A - A kind of power detector - Google Patents
A kind of power detector Download PDFInfo
- Publication number
- CN106154028A CN106154028A CN201610710127.1A CN201610710127A CN106154028A CN 106154028 A CN106154028 A CN 106154028A CN 201610710127 A CN201610710127 A CN 201610710127A CN 106154028 A CN106154028 A CN 106154028A
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- CN
- China
- Prior art keywords
- point
- pipe
- grid
- low pass
- power detector
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to a kind of power detector, belong to power detection techniques field.Including block capacitor C0, C1, couple electric capacity C2, C3, biasing resistor R1, R2, R3, R4, the low pass filter being made up of R5, C4, C5 and PMOS M8, M9；The most coupled grid being capacitively coupled to M2, M1 pipe of input radio frequency signal VIN+, VIN, the radiofrequency signal of pipe drain terminal input realizes self-mixing function with the radiofrequency signal of grid end input through M1, M2, then high fdrequency component is filtered by low pass filter, thus obtaining DC level output, described M8, M9 form source follower structure.The present invention manages, by M9, the voltage difference that stable gate source voltage difference clamps down on the two ends, grid source of M1 pipe and M2 pipe, thus stablizes the direct current biasing of pipe, does not make pipe end.
Description
Technical field
The present invention relates to power detection techniques field, particularly relate to a kind of power detector.
Background technology
For conventional power detectors, in circuit, the drain terminal voltage of pipe is produced by current mirror, and pipe work is led critical
Logical state, drain-source terminal potential is almost equal, and therefore drain terminal bias voltage determines the DC level of outfan, critical owing to being in
The pipe of conducting state is very sensitive to the change of bias voltage, will easily cause pipe cut-off, thus affect power detection
The effect of device.
Summary of the invention
For the problem of shortcomings and deficiencies in prior art, the present invention proposes a kind of power detector, can stablize pipe
Direct current biasing, do not make pipe end.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of power detector, including block capacitor C0, C1, couples electric capacity C2, C3, biasing resistor R1, R2, R3, R4, by
The low pass filter of R5, C4, C5 composition and PMOS M8, M9；CO with C2, C1 with C3 are connected, then are respectively coupled to the grid of M1, M2
Pole, is linked A point through R3, R4 respectively by the grid end of M1, M2, the drain terminal of M1, M2 link B point, and B point is connected with low pass filter,
Described M8, M9 drain terminal is connected, and forms source follower structure, and C point is between M8, M9, and A point is connected with C point, and the grid of M9 leads to
Cross D point to be connected with low pass filter, described between CO, C2 and between C1, C3 by R1, R2 added with bias voltage VB.
Further, described M8 is also connected with pipe M5, M5 and M4 and is connected, M4 with M3 is connected, M3 with M7 is connected, M7 with M6 phase
Even.
Further, the grid of described M5, M6, M8 terminate into power vd D, and the grid of M3, M4, M7 terminate into reference current
IREF, the drain terminal ground connection GND of described M3, M4, M7.
Further, described M9 and low pass filter ground connection.
Further, described CO is connected with input radio frequency signal VIN+, and C1 is connected with input radio frequency signal VIN-, low pass filtered
Ripple device is connected with output signal VOUT.
Further, described A point is equal with C point current potential, and B point is equal with D point current potential.
There is advantages that the present invention has the highest input impedance, about in a kilo-ohm level, power detection saves
The impedance of point is 50 ohm, and the loss therefore introduced is minimum；The power consumption of circuit is the least, microampere rank；Due to by self-mixing side
Formula realizes, and therefore operating frequency is the widest；Sensitivity is the highest, can detect the carrier leakage signal of input power as little as-15dBm.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, people in the art
The present invention can be made various changes or modifications by member, and these equivalent form of values fall within the application appended claims equally and limited
Scope.
As it can be seen, a kind of power detector, including block capacitor C0, C1, couple electric capacity C2, C3, biasing resistor R1,
R2, R3, R4, the low pass filter being made up of R5, C4, C5 and PMOS M8, M9；CO with C2, C1 with C3 are connected, then are respectively coupled to
The grid of M1, M2, is linked A point through R3, R4 respectively by the grid end of M1, M2, the drain terminal of M1, M2 link B point, B point and low pass filtered
Ripple device is connected, and described M8, M9 drain terminal is connected, and forms source follower structure, and C point is between M8, M9, and A point is connected with C point, M9
Grid be connected with low pass filter by D point, described between CO, C2 and between C1, C3, pass through R1, R2 added with bias voltage
VB。
Further, described M8 is also connected with pipe M5, M5 and M4 and is connected, M4 with M3 is connected, M3 with M7 is connected, M7 with M6 phase
Even.
Further, the grid of described M5, M6, M8 terminate into power vd D, and the grid of M3, M4, M7 terminate into reference current
IREF, the drain terminal ground connection GND of described M3, M4, M7.
Further, described M9 and low pass filter ground connection.
Further, described CO is connected with input radio frequency signal VIN+, and C1 is connected with input radio frequency signal VIN-, low pass filtered
Ripple device is connected with output signal VOUT.
Further, described A point is equal with C point current potential, and B point is equal with D point current potential
Specifically, input radio frequency signal VIN+, VIN-the most coupled electric capacity C2, C3 are coupled to the grid of M2, M1 pipe.Drain terminal
The radiofrequency signal of input realizes self-mixing function with the radiofrequency signal of grid end input through M1, M2, is then made up of R5, C5, C4
Low pass filter filters high fdrequency component, thus obtains DC level output.
The drain terminal voltage of M1, M2 pipe is produced by current mirror, and pipe work is at critical conduction mode, and drain-source terminal potential is almost
Equal, therefore drain terminal bias voltage determines the DC level of outfan.PMOS M8, M9 form source follower structure, and M8 is
Current source.When electric current one timing, the potential difference that C, D are 2 is certain value, thus the potential difference between A, B 2 is also definite value.
I.e. manage, by M9, the voltage difference that stable gate source voltage difference clamps down on the two ends, grid source of M1 pipe and M2 pipe.The most in this way
Stablize the direct current biasing of pipe, do not make pipe end.
Claims (6)
1. a power detector, it is characterised in that: include block capacitor C0, C1, couple electric capacity C2, C3, biasing resistor R1,
R2, R3, R4, the low pass filter being made up of R5, C4, C5 and PMOS M8, M9；CO with C2, C1 with C3 are connected, then are respectively coupled to
The grid of M1, M2, is linked A point through R3, R4 respectively by the grid end of M1, M2, the drain terminal of M1, M2 link B point, B point and low pass filtered
Ripple device is connected, and described M8, M9 drain terminal is connected, and forms source follower structure, and C point is between M8, M9, and A point is connected with C point, M9
Grid be connected with low pass filter by D point, described between CO, C2 and between C1, C3, pass through R1, R2 added with bias voltage
VB。
A kind of power detector the most according to claim 1, it is characterised in that: described M8 is also connected with pipe M5, M5 and M4
Being connected, M4 with M3 is connected, M3 with M7 is connected, M7 with M6 is connected.
A kind of power detector the most according to claim 2, it is characterised in that: the grid of described M5, M6, M8 terminate into power supply
VDD, M3, the grid of M4, M7 terminate into reference current IREF, the drain terminal ground connection GND of described M3, M4, M7.
A kind of power detector the most according to claim 1, it is characterised in that: described M9 and low pass filter ground connection.
A kind of power detector the most according to claim 1, it is characterised in that: described CO and input radio frequency signal VIN+ phase
Even, C1 is connected with input radio frequency signal VIN-, and low pass filter is connected with output signal VOUT.
A kind of power detector the most according to claim 1, it is characterised in that: described A point is equal with C point current potential, B point and
D point current potential is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610710127.1A CN106154028A (en) | 2016-08-23 | 2016-08-23 | A kind of power detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610710127.1A CN106154028A (en) | 2016-08-23 | 2016-08-23 | A kind of power detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106154028A true CN106154028A (en) | 2016-11-23 |
Family
ID=57342516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610710127.1A Pending CN106154028A (en) | 2016-08-23 | 2016-08-23 | A kind of power detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106154028A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122437A (en) * | 2014-07-24 | 2014-10-29 | 上海银晟伟业信息技术有限公司 | Silicon substrate power detector |
-
2016
- 2016-08-23 CN CN201610710127.1A patent/CN106154028A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122437A (en) * | 2014-07-24 | 2014-10-29 | 上海银晟伟业信息技术有限公司 | Silicon substrate power detector |
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