CN104143964B - Amplifying circuit achieving true zero-point output for bridge type sensor - Google Patents
Amplifying circuit achieving true zero-point output for bridge type sensor Download PDFInfo
- Publication number
- CN104143964B CN104143964B CN201410355720.XA CN201410355720A CN104143964B CN 104143964 B CN104143964 B CN 104143964B CN 201410355720 A CN201410355720 A CN 201410355720A CN 104143964 B CN104143964 B CN 104143964B
- Authority
- CN
- China
- Prior art keywords
- pin
- circuit
- voltage
- amplifier
- reference voltage
- 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.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The invention provides an amplifying circuit achieving true zero-point output for a bridge type sensor. The amplifying circuit comprises an intelligent amplifier processing circuit (2), an operational amplifier processing circuit (3), a reference voltage generation circuit (4), a negative voltage generation circuit (5) and a supply voltage conversion circuit (6). The supply voltage conversion circuit (6) supplies power to the reference voltage generation circuit (4), the negative voltage generation circuit (5) and the intelligent amplifier processing circuit (2). Reference voltages generated by the reference voltage generation circuit (4) and negative voltages generated by the negative voltage generation circuit (5) are input into the operational amplifier processing circuit (3). The intelligent amplifier processing circuit (2) inputs output signals of a pressure sensor to the operational amplifier processing circuit (3) after carrying out signal processing on the output signals, and the operational amplifier processing circuit (3) outputs the output signals after carrying out zero-point output adjustment on the output signals. The amplifying circuit is supplied with power by a signal power supply, is low in power consumption and small in packaging size and achieves true zero-point voltage output.
Description
Technical field
The invention is related to a kind of amplifying circuit of the electric bridge sensor that can realize true zero output, more particularly to
The tiny signal that electric bridge sensor is exported is converted to by standard voltage signal by intelligent amplifier, being then processed into can be true
The amplifying circuit of zero-point voltage output.
Background technology
At present, the output signal of the electric bridge sensor that single supply is powered is typically what Jing was mainly made up of intelligent amplifier
Amplifying circuit is processed into the standard voltage signal in the range of 0.5-4.5V；In extreme situations, it is also possible to export 0.1-4.9V
The voltage signal of scope.But when the normal voltage of 0-5V outputs is needed, existing amplifying circuit is then helpless, i.e., can not be defeated
Go out genuine 0V voltages, while 5V voltages can not be exported.
The content of the invention
For solving above-mentioned technical problem, the technical scheme that the invention is adopted is：
A kind of electric bridge sensor amplifying circuit for realizing true zero output, including：Intelligent amplifier process circuit 2, fortune
Put process circuit 3, reference voltage generating circuit 4, circuit for generating negative voltage 5, power supply voltage converting circuit 6；
The power supply voltage converting circuit 6 respectively with the reference voltage generating circuit 4, circuit for generating negative voltage 5 and intelligence
Energy amplifier process circuit 2 is electrically connected and is powered for three；
The intelligent amplifier process circuit 2 is used for receiving the output signal of pressure sensor；
The amplifier process circuit 3 is put with the reference voltage generating circuit 4, circuit for generating negative voltage 5 and intelligence respectively
Big device process circuit 2 is electrically connected, and the amplifier process circuit 3 is used as the output end of whole amplifying circuit.
Further, the reference voltage of the generation of the reference voltage generating circuit 4, the circuit for generating negative voltage 5 are produced
Negative voltage is respectively fed to amplifier process circuit 3；Intelligent amplifier process circuit 2 carries out signal to the output signal of pressure sensor
After process, send into after amplifier process circuit 3 carries out offset output adjustment and export.
Further, the power supply voltage converting circuit includes：
The power conversion chip (IC3) of model TPS7A41, power input (Vin) and power conversion chip (IC3)
5th pin and the connection of the 8th pin, power input (Vin) are connected the 7th power filtering capacitor (C7) between ground；Power conversion chip
(IC3) the 1st pin electrical connection 5V power supplys, are also connected with the 4th power filtering capacitor (C4), Power convert core between the 1st pin and GND
The 5th divider resistance (R5) and the 6th filter capacitor (C6), the 2nd pin and the 4th are parallel between 1st pin and the 2nd pin of piece (IC3)
The 6th divider resistance (R6) is parallel between pin, and the 4th pin is also grounded simultaneously；
The 5V voltages of the 1st pin output of power conversion chip (IC3) give reference voltage generating circuit (4), negative voltage respectively
Produce circuit (5), intelligent amplifier process circuit (2) power supply.
Further, the relational expression of the power supply voltage converting circuit output 5V voltages isIts
Middle VREFIt is the magnitude of voltage of the 2nd pin of power conversion chip (IC3), and VREFTake 1.161≤VREF≤ 1.185 fixed values.
Further, the intelligent amplifier signal processing circuit includes：The intelligent amplifier (IC2) of model PGA309,
The storage chip (IC1) of model 24L01, the 1st pin of wherein intelligent amplifier (IC2) are powered for electric bridge sensor, electric bridge
Two output ends difference mono- filter resistances of Jing (R2 or R3) of formula sensor are corresponding with the 4th of intelligent amplifier (IC2) the, the 5th pin
Connection, the 4th of intelligent amplifier (IC2) the, the 5th pin also distinguish mono- filter capacitors of Jing (C1, C2) ground connection；
The 3rd of intelligent amplifier (IC2), the 10th pin is all connected with the 5V that power supply voltage converting circuit (4) is exported, and the 12nd pin is then
The 5V that the 4th resistance (R4) of Jing connection power supply voltage converting circuit (4) is exported；The 2nd of intelligent amplifier (IC2), 11,15 pin it is equal
Ground connection；
The 13rd of intelligent amplifier (IC2), 14 pin are connected respectively the 1st of storage chip (IC1) the, 3 pin, storage chip
(IC1) the 4th pin connects the 5V of the power supply voltage converting circuit output, the 2nd pin ground connection of storage chip (IC1)；
The 6th of intelligent amplifier (IC2), simultaneously outputting standard voltage signal is carried the docking of 7 pin for amplifier process circuit (3)
For input signal, and between the 6th, 7 pin and the 8th pin, it is also connected with one the 3rd filter capacitor (C3).
Further, described reference voltage generating circuit (4) include the reference voltage chip (IC4) of model MCP1525, institute
State the 5V that power supply voltage converting circuit (6) exports to be connected with the 1st pin of reference voltage chip (IC4), reference voltage chip (IC4)
The 3rd pin ground connection and be connected with the 9th electric capacity (C9) between the 2nd pin, the 2nd pin output of reference voltage chip (IC4)
The reference voltage of 2.5V provides amplifier process circuit (3) and is input into as reference voltage.
Further, described circuit for generating negative voltage (5) include that the negative voltage of model LM7705 produces chip (IC6), its
The 5V that 4th pin is exported with power supply voltage converting circuit (6) is connected, the 2nd, 3,5 pin are grounded；The 5th is parallel between 1st, 8 pin
Filter capacitor (C5), is parallel with the 11st filter capacitor (C11) between the 5th, 7 pin, the 6th pin output voltage provides amplifier and processes electricity
Road (3) powers as negative supply.
Further, amplifier process circuit (3) include：The operational amplifier (IC5A) of model OPA2188, which the 8th
Pin connection sensor power power supply (Vin), the output voltage (V-) of the 4th pin connection circuit for generating negative voltage (5), the 6th pin and the 7th
The 12nd current-limiting resistor voltage divider (R12) is parallel between pin, and the tenth current-limiting resistor voltage dividers (R10) of the 6th pin Jing are produced with reference voltage
The 2.5V connections of the raw output of circuit 4, the 6th pin also the 11st current-limiting resistor voltage dividers (R10) of Jing ground connection；The 7th current limlitings of 5th pin Jing electricity
The signal (Vout1) that resistance (R7) is exported with intelligent amplifier process circuit (2) is connected；7th pin exports 0-5V voltage signals.
Further, the electric bridge sensor is bridge type pressure sensor.
The invention has the advantages and positive effects that：Electric bridge sensor works as input after this amplifying circuit
Measured value when being zero, the output voltage signal of amplifying circuit can be true zero voltage；And this circuit is powered by single supply, protecting
Demonstrate,prove under low in energy consumption, small package dimensional conditions, with true zero voltage output.
Description of the drawings
The system block diagram of Fig. 1 circuits of the present invention；
A kind of schematic diagram of embodiment of Fig. 2 power supply voltage converting circuits；
A kind of schematic diagram of embodiment of Fig. 3 intelligent amplifier process circuits；
A kind of schematic diagram of embodiment of Fig. 4 reference voltage generating circuits；
A kind of schematic diagram of embodiment of Fig. 5 circuit for generating negative voltage；
A kind of schematic diagram of embodiment of Fig. 6 amplifier process circuits.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the invention is elaborated.Following examples are with bridge type pressure
As a example by force snesor, i.e., by taking the electric bridge sensor of measuring pressure as an example, the electric bridge sensor for measuring other specification is also applied for
The amplifying circuit of the present invention.
The system block diagram of circuit of the present invention is put to its output signal as shown in figure 1,1 is bridge type pressure sensor
Big amplifying circuit includes：Intelligent amplifier (PGA309) process circuit 2, amplifier process circuit 3, reference voltage generating circuit 4,
Circuit for generating negative voltage 5, power supply voltage converting circuit 6.
The working condition of the amplifying circuit is that 6 output voltage of power supply voltage converting circuit sends into reference voltage generation all the way
Circuit 4, another road send into circuit for generating negative voltage 5, and intelligent amplifier (PGA309) process circuit 2 is sent on the 3rd tunnel；Benchmark electricity
Pressure produces the reference voltage of the generation of circuit 4, the negative voltage of the generation of circuit for generating negative voltage 5 and is respectively fed to amplifier process circuit 3；Electricity
After 1 output signal of bridge pressure sensor feeding intelligent amplifier (PGA309) process circuit 2 carries out signal transacting, fortune is re-fed into
Put after process circuit 3 carries out offset output adjustment and export.
Respectively each several part circuit realiration function is illustrated with reference to Fig. 2 to Fig. 6：
Fig. 2 presents a kind of concrete structure of power supply voltage converting circuit, and the circuit adopts power conversion chip
(TPS7A41), realize for sensor power supply voltage (generally 9-36V) being converted into 5V fixed voltages, there is provided intelligence is amplified
Device (PGA309) process circuit 3, reference voltage generating circuit 4, circuit for generating negative voltage 5 are powered.The concrete structure of the circuit is such as
Shown in Fig. 2, including：5 pin and 8 pin of power conversion chip IC3 (model TPS7A41), power input Vin and IC3 are connected,
Connect the 7th power filtering capacitor C7 between power input Vin and GND；The 1 pin electrical connection 5V power supplys of IC3,1 pin and GND it
Between be also connected with the 4th power filtering capacitor C4, be parallel with the 5th divider resistance R5 and the 6th filtered electrical between 1 pin and 2 pin of IC3
Hold C6, between 2 pin and 4 pin, be parallel with divider resistance R6,4 pin also connect GND simultaneously.The relational expression of this circuit output 5V voltage isWherein VREFIt is the magnitude of voltage of the 2nd pin of power conversion chip (IC3), and VREFTake 1.161≤
VREF≤ 1.185 fixed values.The 5V voltages that 1 pin of power conversion chip IC3 is exported are to reference voltage generating circuit 4, negative voltage
Produce 2 three circuits of circuit 5, intelligent amplifier (PGA309) process circuit to power.
Fig. 3 presents a kind of concrete structure of intelligent amplifier signal processing circuit, and the circuit adopts intelligent amplifier core
Piece (PGA309) is realized for electric bridge sensor exporting the standard voltage signal that small voltage signal adjusts into 0.5-4.5V.The electricity
The concrete structure on road as shown in figure 3, including：Intelligent amplifier IC2 (model PGA309), storage chip IC1 (models
24L01), resistance R2, electric capacity C1, resistance R1, electric capacity C2 composition rc filter circuit.The 1 of bridge type pressure sensor Sensor1
Pin is connected with 1 pin of IC2, and 4 pin of Sensor1 are connected with GND, and i.e. two output ends of 2,3 pin of Sensor1 are corresponded to and electricity respectively
One end connection of resistance R2, R3,4,5 pin of the other end and IC2 of resistance R2, R3, electric capacity C1, C2 one end 4,5 pin also with IC4 connect
Connect, the other end connection GND of C1, C2.Filter capacitor C3 one end is connected with 8 pin of IC2, and the other end is connected with 6,7 pin, IC2's
3rd, 10 pin are all connected with the 5V of the output of power supply voltage converting circuit 4, then the 4th resistance (R4) of the Jing connection supply voltage conversion of the 12nd pin
The 5V of the output of circuit 4；The 2 of IC2,11,15 pin be all connected with GND, 1,3 pin of 13,14 pin of IC2 respectively with IC1 are connected, the 4 of IC1
The 2 pin connection GND of the 5V of the pin connection output of power supply voltage converting circuit 4, IC1.This circuit part is exported by 6,7 pin of IC2
Standard voltage signal Vout1 is that amplifier process circuit 3 provides input signal.
Fig. 4 presents a kind of concrete structure of reference voltage generating circuit, and the circuit is using small encapsulation, high precision reference electricity
Pressure chip (MCP1525) realizes that 2.5V reference voltages are produced.The concrete structure of the circuit as shown in figure 4, including：Reference voltage core
Piece IC4 (model MCP1525), the 5V of the output of power supply voltage converting circuit 6 are connected with 1 pin of IC4, the 3 pin connection GND of IC4.
9th electric capacity C9 is connected in parallel between 2 pin of IC4 and GND.This circuit provides fortune by the reference voltage that 2 pin of IC4 export 2.5V
Put process circuit 3 to be input into as reference voltage.
Fig. 5 presents a kind of concrete structure of circuit for generating negative voltage, and the circuit produces chip using small package, negative voltage
(LM7705) -0.23V voltage outputs are realized.The concrete structure of the circuit as shown in figure 5, including：Negative voltage produces chip IC 6
(model LM7705), power supply voltage converting circuit 6 output 5V be connected with 4 pin of IC6, the 2 of IC6,3,5 pin be all connected with GND.
Filter capacitor C5 is connected in parallel between the 1 of IC6,8 pin, and filter capacitor C11 is connected in parallel between the 5 of IC6,7 pin, and 6 pin of IC6 connect output
Voltage V- (- 0.23V), this output voltage provide amplifier process circuit 3 and power as negative supply.
Fig. 6 presents a kind of concrete structure of amplifier process circuit, and the circuit adopts track to track operational amplifier
(OPA2188), realize the Vout1 voltage signals that intelligent amplifier (PGA309) process circuit 3 is exported are converted into the electricity of 0-5V
Pressure signal.The concrete structure of the circuit as shown in fig. 6, including：8 pin of operational amplifier IC5A (model OPA2188), IC5A
Connection sensor power power supply Vin, 4 pin of IC5A connect the output voltage V- of circuit for generating negative voltage 5,6 pin of IC5A respectively with
One end connection of current-limiting resistor voltage divider R10, R11, R12, wherein the other end of resistance R10 is exported with reference voltage generating circuit 4
2.5V connection, the other end of resistance R11 be connected with GND, the other end of resistance R12 is connected with 7 pin of IC5A, current-limiting resistance R7
The signal Vout1 that exports with intelligent amplifier (PGA309) process circuit 2 of one end be connected, the other end is connected with 4 pin of IC5A,
This circuit exports 0-5V voltage signals by 7 pin of IC5A.
Its output voltage is:
Above example is merely to illustrate and not limits the technical scheme described by the invention, it is impossible to be considered as using
In the practical range for limiting the invention.All impartial changes made according to the invention application range and improvement etc., all should
Still belong within the patent covering scope of the invention.
Claims (8)
1. it is a kind of realize true zero output electric bridge sensor amplifying circuit, including：Intelligent amplifier process circuit (2),
Amplifier process circuit (3), reference voltage generating circuit (4), circuit for generating negative voltage (5), power supply voltage converting circuit (6)；
Power supply voltage converting circuit (6) respectively with the reference voltage generating circuit (4), circuit for generating negative voltage (5) and
Intelligent amplifier process circuit (2) is electrically connected；
Described intelligent amplifier process circuit (2) are used for receiving the output signal of electric bridge sensor；
Amplifier process circuit (3) respectively with the reference voltage generating circuit (4), circuit for generating negative voltage (5) and intelligence
Amplifier process circuit (2) is electrically connected；
The intelligent amplifier signal processing circuit includes：The intelligent amplifier (IC2) of model PGA309, model 24L01
Storage chip (IC1), the 1st pin of wherein intelligent amplifier (IC2) powers for electric bridge sensor, the two of electric bridge sensor
Individual output end difference mono- filter resistances of Jing are corresponding with the 4th of intelligent amplifier (IC2) the, the 5th pin to be connected, intelligent amplifier (IC2)
The 4th, the 5th pin also distinguish mono- filter capacitors of Jing ground connection；
The 3rd of intelligent amplifier (IC2), the 10th pin is all connected with the 5V that power supply voltage converting circuit (4) is exported, the 12nd pin then Jing
The 5V that four resistance (R4) connection power supply voltage converting circuit (4) are exported；The 2nd of intelligent amplifier (IC2), 11,15 pin are grounded；
The 13rd of intelligent amplifier (IC2), 14 pin are connected respectively the 1st of storage chip (IC1) the, 3 pin, storage chip
(IC1) the 4th pin connects the 5V of the power supply voltage converting circuit output, the 2nd pin ground connection of storage chip (IC1)；
The 6th of intelligent amplifier (IC2), simultaneously outputting standard voltage signal is that described amplifier process circuit (3) offer is defeated to the docking of 7 pin
Enter and between signal, and the 6th, 7 pin and the 8th pin, be also connected with one the 3rd filter capacitor (C3).
2. amplifying circuit according to claim 1, it is characterised in that：
Described power supply voltage converting circuit (6) be respectively reference voltage generating circuit (4), circuit for generating negative voltage (5) and
Intelligent amplifier process circuit (2) is powered；
The negative voltage point that reference voltage that reference voltage generating circuit (4) produce, the circuit for generating negative voltage (5) are produced
Song Ru not amplifier process circuit (3)；Intelligent amplifier process circuit (2) carries out signal transacting to the output signal of pressure sensor
Afterwards, send into after amplifier process circuit (3) carries out offset output adjustment and export.
3. amplifying circuit according to claim 1, it is characterised in that：The power supply voltage converting circuit includes：
The power conversion chip (IC3) of model TPS7A41, power input (Vin) and the 5th of power conversion chip (IC3)
Pin and the connection of the 8th pin, power input (Vin) are connected the 7th power filtering capacitor (C7) between ground；Power conversion chip
(IC3) the 1st pin electrical connection 5V power supplys, are also connected with the 4th power filtering capacitor (C4), Power convert core between the 1st pin and GND
The 5th divider resistance (R5) and the 6th filter capacitor (C6), the 2nd pin and the 4th are parallel between 1st pin and the 2nd pin of piece (IC3)
The 6th divider resistance (R6) is parallel between pin, and the 4th pin is also grounded simultaneously；
The 5V voltages of the 1st pin output of power conversion chip (IC3) are produced to reference voltage generating circuit (4), negative voltage respectively
Circuit (5), intelligent amplifier process circuit (2) power supply.
4. amplifying circuit according to claim 3, it is characterised in that：The power supply voltage converting circuit output 5V voltages
Relational expression isWherein VREFIt is the magnitude of voltage of the 2nd pin of power conversion chip (IC3), and VREFTake
1.161≤VREF≤ 1.185 fixed values；
In relational expression, R5 is the resistance value of the 5th divider resistance, and R6 is the resistance value of the 6th divider resistance.
5. amplifying circuit according to claim 1, it is characterised in that：Described reference voltage generating circuit (4) include model
For the reference voltage chip (IC4) of MCP1525, the 5V that power supply voltage converting circuit (6) export and reference voltage chip
(IC4) the 1st pin connection, the 3rd pin of reference voltage chip (IC4) are grounded and are connected with the 9th electric capacity between the 2nd pin
(C9), the reference voltage of the 2nd pin output 2.5V of reference voltage chip (IC4) provides amplifier process circuit (3) as benchmark
Control source.
6. amplifying circuit according to claim 1, it is characterised in that：Described circuit for generating negative voltage (5) include model
The negative voltage of LM7705 produces chip (IC6), and the 5V that its 4th pin is exported with power supply voltage converting circuit (6) is connected, and the 2nd, 3,5
Pin is grounded；The 5th filter capacitor (C5) is parallel between 1st, 8 pin, is parallel with the 11st filter capacitor between the 5th, 7 pin
(C11), the 6th pin output voltage provides amplifier process circuit (3) and powers as negative supply.
7. amplifying circuit according to claim 1, it is characterised in that：Amplifier process circuit (3) include：Model
The operational amplifier (IC5A) of OPA2188, its 8th pin connection sensor power power supply (Vin), the 4th pin connection negative voltage are produced
The output voltage (V-) of circuit (5), is parallel with the 12nd current-limiting resistor voltage divider (R12), the 6th pin Jing between the 6th pin and the 7th pin
The 2.5V that ten current-limiting resistor voltage dividers (R10) are exported with reference voltage generating circuit 4 is connected, the 6th pin also the 11st partial pressure current limlitings of Jing
Resistance (R10) is grounded；The signal (Vout1) that the 7th current-limiting resistances (R7) of 5th pin Jing are exported with intelligent amplifier process circuit (2)
Connection；7th pin exports 0-5V voltage signals.
8. the amplifying circuit according to claim 1 to 7 any one, it is characterised in that：The electric bridge sensor is electricity
Bridge pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355720.XA CN104143964B (en) | 2014-07-23 | 2014-07-23 | Amplifying circuit achieving true zero-point output for bridge type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355720.XA CN104143964B (en) | 2014-07-23 | 2014-07-23 | Amplifying circuit achieving true zero-point output for bridge type sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104143964A CN104143964A (en) | 2014-11-12 |
| CN104143964B true CN104143964B (en) | 2017-03-22 |
Family
ID=51853053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410355720.XA Active CN104143964B (en) | 2014-07-23 | 2014-07-23 | Amplifying circuit achieving true zero-point output for bridge type sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104143964B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833297A (en) * | 2015-05-26 | 2015-08-12 | 上海工程技术大学 | Signal processing unit for multichannel micro-strain data acquisition system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005339467A (en) * | 2004-05-31 | 2005-12-08 | Sharp Corp | Regulator circuit and liquid crystal display |
| CN202511939U (en) * | 2012-03-27 | 2012-10-31 | 淄博飞雁先行测控技术有限公司 | Signal conditioning circuit of 0-5V output pressure sensor |
| CN203011602U (en) * | 2012-12-06 | 2013-06-19 | 长沙南车电气设备有限公司 | Current type pressure transmitter |
| CN103869863A (en) * | 2014-03-25 | 2014-06-18 | 成都国科海博信息技术股份有限公司 | Sensor conditioning circuit |
| CN204013419U (en) * | 2014-07-23 | 2014-12-10 | 博益(天津)气动技术研究所有限公司 | A kind of amplifying circuit of the electric bridge sensor of realizing true zero output |
-
2014
- 2014-07-23 CN CN201410355720.XA patent/CN104143964B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005339467A (en) * | 2004-05-31 | 2005-12-08 | Sharp Corp | Regulator circuit and liquid crystal display |
| CN202511939U (en) * | 2012-03-27 | 2012-10-31 | 淄博飞雁先行测控技术有限公司 | Signal conditioning circuit of 0-5V output pressure sensor |
| CN203011602U (en) * | 2012-12-06 | 2013-06-19 | 长沙南车电气设备有限公司 | Current type pressure transmitter |
| CN103869863A (en) * | 2014-03-25 | 2014-06-18 | 成都国科海博信息技术股份有限公司 | Sensor conditioning circuit |
| CN204013419U (en) * | 2014-07-23 | 2014-12-10 | 博益(天津)气动技术研究所有限公司 | A kind of amplifying circuit of the electric bridge sensor of realizing true zero output |
Non-Patent Citations (4)
| Title |
|---|
| 50V输入电压、50mA、超高电压线性稳压器;天堂狗1420;《wenku.baidu.com/view/211efa87e53a580216fcfe0f.html?from=search》;20120502;1-17页 * |
| Application Note 1883 LM7705 Evaluation Board (cn);Texas Instruments;《www.ti.com.cn/product/cn/LM7705/technicaldocuments》;20090519;1-5页 * |
| 基于 PGA309 的信号调理系统的设计;王永清;《电子设计工程》;20111130;第19卷(第22期);287-190页 * |
| 精准电压基准MCP1525、MCP1541中文资料;thebmwboy;《wenku.baidu.com/view/35cc17c48bd63186bcebbc0f.html?from=search》;20101223;1-16页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104143964A (en) | 2014-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102412824A (en) | Differential reference voltage buffer | |
| CN202395750U (en) | Differential reference voltage buffer | |
| CN206922415U (en) | A kind of under-voltage protecting circuit of onboard system, auto meter and vehicle | |
| CN207440271U (en) | A kind of Multichannel analogue cell device | |
| CN205721464U (en) | A kind of analog voltage output circuit | |
| CN104143964B (en) | Amplifying circuit achieving true zero-point output for bridge type sensor | |
| CN103675317B (en) | A kind of low-power consumption servo circuit for quartz flexible accelerometer | |
| CN209327890U (en) | A kind of voltage regulator circuit, power supply and electrical equipment | |
| CN204619340U (en) | A kind of voice-prompting type boxing strength aware circuit | |
| CN205809163U (en) | Battery management system power consumption detection circuit | |
| CN204013419U (en) | A kind of amplifying circuit of the electric bridge sensor of realizing true zero output | |
| CN204556811U (en) | The shunt signal simulator that a kind of USB of support powers | |
| CN203233186U (en) | Charging circuit and communication terminal | |
| CN205718819U (en) | A kind of position chi signal input circuit | |
| CN206440799U (en) | A kind of circuit checker | |
| CN206471883U (en) | The electric instrument that a kind of bus-powered communication is combined | |
| CN206400074U (en) | A kind of high-precision power battery pack data collecting system | |
| CN103441544B (en) | The multivoltage output control circuit of intelligent charger | |
| CN207703935U (en) | Wide-range voltage harvester is mutually isolated in a kind of multichannel | |
| CN102706473B (en) | Temperature detecting circuit applied to radio frequency receiver | |
| CN206848359U (en) | A kind of high precision electro flow measurement circuitry | |
| CN107179511A (en) | The circuit structure and method of a kind of charging and discharging currents detection | |
| CN208953168U (en) | A kind of pressure-measuring system based on voltage-type pressure sensor | |
| CN208013293U (en) | A kind of alternating current sample circuit | |
| CN205304767U (en) | Analog to digital conversion circuit with two reference sources |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 300457 Tianjin Binhai New Area Development Zone No. 80 ninth street Fenghua Industrial Park No. 7 Factory Applicant after: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INSTITUTE CO., LTD. Address before: 300457 Tianjin Binhai New Area Development Zone No. 80 ninth street Fenghua Industrial Park No. 7 Factory Applicant before: Boyi (Tianjin) Pneumatic Technology Inst. Co. Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INST. CO. LTD. TO: TIANJIN BOYI PNEUMATIC TECHNOLOGY INSTITUTE CO., LTD. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |