CN106226743A - A kind of low-power consumption radar constant-current source - Google Patents
A kind of low-power consumption radar constant-current source Download PDFInfo
- Publication number
- CN106226743A CN106226743A CN201610619855.1A CN201610619855A CN106226743A CN 106226743 A CN106226743 A CN 106226743A CN 201610619855 A CN201610619855 A CN 201610619855A CN 106226743 A CN106226743 A CN 106226743A
- Authority
- CN
- China
- Prior art keywords
- resistance
- operational amplifier
- current source
- constant
- outfan
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of low-power consumption radar constant-current source, including: reference source；With the first resistor coupled in parallel after second resistance and the first capacitances in series, the first in parallel end connects reference source outfan, the second end in parallel by the 3rd resistance eutral grounding end, connect the first operational amplifier reverse input end, connect the second operational amplifier output terminal by the 7th resistance；First operational amplifier input in the same direction is by the 5th resistance eutral grounding end, by the 6th resistance connection emitter；Transistor base connects the outfan of the first operational amplifier, colelctor electrode is connected the first operational amplifier power end, emitter stage and connected the input in the same direction of the second operational amplifier by the 8th resistance, connects common port as constant-current source outfan；Second operational amplifier reverse input end connects between the 7th resistance and the second operational amplifier output terminal；Controller connects between constant-current source outfan and reference source.The present invention realizes that load capacity is strong, low-power consumption, the output of stable constant-current source.
Description
Technical field
The present invention relates to radar equipment technical field, particularly relate to a kind of low-power consumption radar constant-current source.
Background technology
Radar is to find target by wireless method and measure their locus.Therefore, radar is also referred to as " nothing
Line electricity positions ".Radar is the electronic equipment utilizing electromagnetic wave detection target, and its information carrier is radio wave, and its principle is
The transmitter of radar equipment passes through bundle of lines electromagnetic wave energy directive space, sky a direction, is in the object reflection that this side up and touches
The electromagnetic wave arrived；Radar antenna receives this echo, delivers to reception equipment and processes, and extracts some information of this object relevant
(distance of target object to radar, range rate or radial velocity, orientation, height etc.).
Each circuit in radar includes power supply circuits part, voltage source or current source and is typically to rise in circuit
To power supply function, the most common voltage source has LDO, Switching Power Supply, three terminal regulator, voltage-dropping type mu balanced circuit etc..At some
Circuit test system or power supply circuits may require that, stable constant-current source goes to drive, such as in the drive circuit of LED, it is necessary to adopt
Drive with constant-current source, otherwise light flash, affect illumination functions.
Summary of the invention
For above-mentioned technical problem, a kind of low-power consumption radar constant-current source disclosed by the invention, by reference source, modulate circuit
With operational amplification circuit and controller, it is achieved load capacity is strong, low-power consumption, the output of stable constant-current source.
The technical scheme that the present invention provides is: a kind of low-power consumption radar constant-current source, including:
Reference source, exports reference current；
Modulate circuit；It includes the first resistance, the second resistance, the 3rd resistance and the first electric capacity；Described second resistance is with described
With described first resistor coupled in parallel after first capacitances in series, the first end in parallel is connected to the outfan of described reference source, parallel connection
Second end passes through described 3rd resistance eutral grounding end；
Operational amplification circuit, it includes the first operational amplifier, the second operational amplifier, transistor, the 5th resistance, the 6th electricity
Resistance, the 7th resistance and the 8th resistance；Second end of described parallel connection is also connected to the reverse input of described first operational amplifier
End；The input in the same direction of described first operational amplifier is by described 5th resistance eutral grounding end, be connected to institute by the 6th resistance
State the emitter stage of transistor；The base stage of described transistor is connected to the outfan of described first operational amplifier；Described transistor
Colelctor electrode be connected to the power end of described first operational amplifier；Second end of described parallel connection is also by described 7th resistance even
Receive the outfan of described second operational amplifier；The reverse input end of described second operational amplifier is connected to described 7th electricity
Between resistance and the outfan of described second operational amplifier；The emitter stage of described transistor is connected to described by the 8th resistance
The connection of the input in the same direction of the input in the same direction of two operational amplifiers, described 8th resistance and described second operational amplification circuit
Common port is as the outfan of constant-current source；
Controller, described controller is connected between the outfan of described constant-current source and described reference source.
Preferably, the one during described controller is single-chip microcomputer, DSP or FPGA.
Preferably, described modulate circuit also includes the second electric capacity and the 4th resistance；
Described second electric capacity one end is connected to described common port in parallel；The described second electric capacity other end is by described 4th resistance even
Receive and be connected respectively to the reverse input end of described first operational amplifier and described 7th resistance.
Preferably, described first operational amplifier is low-power integrated operational amplifier, described second operational amplifier
It it is high accuracy integrated operational amplifier.
Preferably, described transistor is field-effect transistor.
The present invention provides the benefit that compared to prior art: the present invention is by reference source, modulate circuit and the first computing
Amplifier and the operational amplification circuit of the second operational amplifier composition, output loading capability is strong, low-power consumption radar constant-current source；Pass through
Between constant-current source outfan and reference source, it is provided with controller, it is achieved the negative feedback of constant-current source output, improves constant-current source further
The stability of output.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the present invention a kind of low-power consumption radar constant-current source.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to description literary composition
Word can be implemented according to this.
The present invention provides a kind of low-power consumption radar constant-current source, as shown in Figure 1, and including:
Reference source, exports reference current Iref；
Modulate circuit；It includes the first resistance R1, the second resistance R2, the 3rd resistance R3 and the first electric capacity C1；Second resistance R2
After connecting with the first electric capacity C1 in parallel with the first resistance R1, the first in parallel end is connected to the outfan of reference source, in parallel the
Two ends pass through the 3rd resistance R3 earth terminal；
Operational amplification circuit, it includes the first operational amplifier A MP1, the second operational amplifier A MP2, transistor Q1, the 5th electricity
Resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8；Second end in parallel is also connected to the first operational amplifier
The reverse input end of AMP1；The input in the same direction of the first operational amplifier A MP1 is by the 5th resistance R5 earth terminal, by the 6th
Resistance R6 is connected to the emitter stage of transistor Q1；The base stage of transistor Q1 is connected to the outfan of the first operational amplifier A MP1；
The colelctor electrode of transistor Q1 is connected to the power end of the first operational amplifier A MP1；Second end in parallel is also by the 7th resistance R7
It is connected to the outfan of the second operational amplifier A MP2；The reverse input end of the second operational amplifier A MP2 is connected to the 7th resistance
Between the outfan of R7 and the second operational amplifier A MP2；The emitter stage of transistor Q1 is connected to the second fortune by the 8th resistance R8
Calculate the input in the same direction of amplifier AMP2, the connection common port of the input in the same direction of the 8th resistance R8 and the second operational amplification circuit
Outfan I as constant-current sourceout；
Controller, controller is connected to the outfan I of constant-current sourceoutAnd between reference source.
In above-mentioned embodiment, the addition of the second operational amplifier A MP2, improve the load capacity of the constant-current source of output.
Second resistance R2 and the first electric capacity C1 is in parallel with the first resistance R1 after connecting, and the first end in parallel is connected to the output of reference source
End, has and improves reference current IrefThe effect of high frequency compensation.Controller is connected to the outfan I of constant-current sourceoutWith reference source it
Between, by the controller constant-current source I to outputoutDetecting, and feed back to reference source, reference source is according to the feedback of controller
To reference current IrefIt is adjusted, improves the stability of constant-current source output.
As preferably, controller is the one in single-chip microcomputer, DSP or FPGA, all can realize detection and signal feedback
Function.
As preferably, transistor Q1 is field-effect transistor, and the input impedance of field-effect transistor is high, noise is little, the limit
Frequency is high, power consumption is little, manufacturing process is simple, good temp characteristic, reduces the power consumption of constant-current source to a certain extent.
As preferably, modulate circuit also includes the second electric capacity C2 and the 4th resistance R4；Second electric capacity C2 one end is connected to also
Connection common port；The second electric capacity C2 other end is connected to be connected respectively to the anti-of the first operational amplifier A MP1 by the 4th resistance R4
To input and the 7th resistance R7.Second electric capacity C2 and the 4th resistance R4 series connection is followed by the second resistance R2, the first electric capacity C1 string
Outfan in parallel for resistance R1 with first after connection and the reverse input end of the first operational amplifier A MP1, the 7th resistance R7 it
Between, for impedance matching, reduce radiation interference, reduce reference current IrefEnergy loss.
As preferably, the first operational amplifier A MP1 is low-power integrated operational amplifier, the second operational amplifier A MP2
It it is high accuracy integrated operational amplifier.Low-power integrated operational amplifier coordinates with high accuracy integrated operational amplifier, is reaching
While stable constant-current source output, reduce system power dissipation further.
Although embodiment of the present invention are disclosed as above, but it is not restricted in description and embodiment listed
Using, it can be applied to various applicable the field of the invention completely, for those skilled in the art, and can be easily
Realizing other amendment, therefore under the general concept limited without departing substantially from claim and equivalency range, the present invention does not limit
In specific details with shown here as the legend with description.
Claims (5)
1. a low-power consumption radar constant-current source, it is characterised in that including:
Reference source, exports reference current；
Modulate circuit；It includes the first resistance, the second resistance, the 3rd resistance and the first electric capacity；Described second resistance is with described
With described first resistor coupled in parallel after first capacitances in series, the first end in parallel is connected to the outfan of described reference source, parallel connection
Second end passes through described 3rd resistance eutral grounding end；
Operational amplification circuit, it includes the first operational amplifier, the second operational amplifier, transistor, the 5th resistance, the 6th electricity
Resistance, the 7th resistance and the 8th resistance；Second end of described parallel connection is also connected to the reverse input of described first operational amplifier
End；The input in the same direction of described first operational amplifier is by described 5th resistance eutral grounding end, be connected to institute by the 6th resistance
State the emitter stage of transistor；The base stage of described transistor is connected to the outfan of described first operational amplifier；Described transistor
Colelctor electrode be connected to the power end of described first operational amplifier；Second end of described parallel connection is also by described 7th resistance even
Receive the outfan of described second operational amplifier；The reverse input end of described second operational amplifier is connected to described 7th electricity
Between resistance and the outfan of described second operational amplifier；The emitter stage of described transistor is connected to described by the 8th resistance
The connection of the input in the same direction of the input in the same direction of two operational amplifiers, described 8th resistance and described second operational amplification circuit
Common port is as the outfan of constant-current source；
Controller, described controller is connected between the outfan of described constant-current source and described reference source.
2. low-power consumption radar constant-current source as claimed in claim 1, it is characterised in that described controller be single-chip microcomputer, DSP or
One in FPGA.
3. low-power consumption radar constant-current source as claimed in claim 1, it is characterised in that described modulate circuit also includes the second electric capacity
With the 4th resistance；
Described second electric capacity one end is connected to described common port in parallel；The described second electric capacity other end is by described 4th resistance even
Receive and be connected respectively to the reverse input end of described first operational amplifier and described 7th resistance.
4. low-power consumption radar constant-current source as claimed in claim 1, it is characterised in that described first operational amplifier is low-power consumption
Integrated operational amplifier, described second operational amplifier is high accuracy integrated operational amplifier.
5. low-power consumption radar constant-current source as claimed in claim 1, it is characterised in that described transistor is field-effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610619855.1A CN106226743A (en) | 2016-08-01 | 2016-08-01 | A kind of low-power consumption radar constant-current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610619855.1A CN106226743A (en) | 2016-08-01 | 2016-08-01 | A kind of low-power consumption radar constant-current source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106226743A true CN106226743A (en) | 2016-12-14 |
Family
ID=57536003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610619855.1A Withdrawn CN106226743A (en) | 2016-08-01 | 2016-08-01 | A kind of low-power consumption radar constant-current source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106226743A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806467A (en) * | 2019-10-25 | 2020-02-18 | 广州华清环境监测有限公司 | Water quality sampling, detecting and analyzing system |
| CN113092043A (en) * | 2021-03-31 | 2021-07-09 | 国网四川省电力公司检修公司 | Method and system for acquiring vibration data of iron core looseness |
| WO2024104327A1 (en) * | 2022-11-15 | 2024-05-23 | Hesai Technology Co., Ltd. | Voltage adjustment circuits, voltage adjustment methods, and lidars |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329805A (en) * | 2008-07-30 | 2008-12-24 | 郭保宣 | Control circuit for infrared radar alarm |
| CN101715264A (en) * | 2009-12-02 | 2010-05-26 | 海洋王照明科技股份有限公司 | Over-voltage lockout protection circuit and LED drive circuit using same |
| US20140084967A1 (en) * | 2012-09-24 | 2014-03-27 | Denso Corporation | Drive circuit for switching element |
| CN104320112A (en) * | 2014-09-26 | 2015-01-28 | 中国电子科技集团公司第二十四研究所 | Two-way clock generation circuit with precise and adjustable phases |
| CN105050280A (en) * | 2015-08-11 | 2015-11-11 | 苏州晶雷光电照明科技有限公司 | Drive circuit of light-emitting diode (LED) corridor lighting system |
-
2016
- 2016-08-01 CN CN201610619855.1A patent/CN106226743A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329805A (en) * | 2008-07-30 | 2008-12-24 | 郭保宣 | Control circuit for infrared radar alarm |
| CN101715264A (en) * | 2009-12-02 | 2010-05-26 | 海洋王照明科技股份有限公司 | Over-voltage lockout protection circuit and LED drive circuit using same |
| US20140084967A1 (en) * | 2012-09-24 | 2014-03-27 | Denso Corporation | Drive circuit for switching element |
| CN104320112A (en) * | 2014-09-26 | 2015-01-28 | 中国电子科技集团公司第二十四研究所 | Two-way clock generation circuit with precise and adjustable phases |
| CN105050280A (en) * | 2015-08-11 | 2015-11-11 | 苏州晶雷光电照明科技有限公司 | Drive circuit of light-emitting diode (LED) corridor lighting system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806467A (en) * | 2019-10-25 | 2020-02-18 | 广州华清环境监测有限公司 | Water quality sampling, detecting and analyzing system |
| CN113092043A (en) * | 2021-03-31 | 2021-07-09 | 国网四川省电力公司检修公司 | Method and system for acquiring vibration data of iron core looseness |
| WO2024104327A1 (en) * | 2022-11-15 | 2024-05-23 | Hesai Technology Co., Ltd. | Voltage adjustment circuits, voltage adjustment methods, and lidars |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104953961B (en) | A kind of twin-stage is against D classes power amplification circuit and radio-frequency power amplifier | |
| CN103218003B (en) | Low-dropout voltage stabilizer with multiple power sources input | |
| US10483802B2 (en) | Peak voltage detection in a differentially driven wireless resonant transmitter | |
| US20080266917A1 (en) | Dc/dc converting system | |
| CN106226743A (en) | A kind of low-power consumption radar constant-current source | |
| CN103634016A (en) | Adjustable Impedance Matching Circuit | |
| US20180191199A1 (en) | Resonant regulating rectifier with an integrated antenna | |
| CN105009434A (en) | Switching power converter | |
| CN108574310A (en) | A kind of USB interface charging circuit | |
| CN104303416B (en) | For the integrated technology of enhanced power amplifier forward power detection | |
| KR20170008933A (en) | Power supplying appatus for power amplifier | |
| CN113868049B (en) | Touch matrix repair circuit of capacitive touch screen | |
| TWI680399B (en) | Touch circuit | |
| CN105786071B (en) | A kind of low-dropout linear voltage-regulating circuit and low pressure difference linearity stable-pressure device | |
| CN103580619B (en) | A kind of power amplifier device and linear regulator | |
| CN204044342U (en) | Two-way hysteresis comparator circuit and magnetic sensor circuit | |
| CN105136633A (en) | Pulsed infrared dust concentration detection circuit | |
| US9952260B2 (en) | Power detection circuit and radio frequency circuit using the same | |
| CN202757980U (en) | Analog signal isolation detection circuit | |
| US8564265B2 (en) | Driving circuit | |
| CN102236047A (en) | Power detection circuit and electronic circuit for measuring output power of amplification circuit | |
| CN104569558B (en) | Peak detector for amplifier | |
| CN203882223U (en) | Voltage-controlled current source circuit | |
| CN104977974A (en) | Integral control module used for heavy current power device test system | |
| CN202435394U (en) | Mobile terminal and RF transmitting and receiving circuit thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20161214 |