CN207010652U - A kind of PWM pulse width signals DA changes miniature isolating transmitter - Google Patents
A kind of PWM pulse width signals DA changes miniature isolating transmitter Download PDFInfo
- Publication number
- CN207010652U CN207010652U CN201720596136.2U CN201720596136U CN207010652U CN 207010652 U CN207010652 U CN 207010652U CN 201720596136 U CN201720596136 U CN 201720596136U CN 207010652 U CN207010652 U CN 207010652U
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- circuit
- pulse width
- pwm pulse
- width signals
- power
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Abstract
The utility model is that a kind of PWM pulse width signals DA changes miniature isolating transmitter, belongs to transmitter technical field.A kind of PWM pulse width signals DA of the utility model changes miniature isolating transmitter; include current limiting pressure-limiting protection circuit, high-speed isolated circuit, accurate reference voltage on-off circuit, low-pass filter circuit, zero correction circuit, signal amplification circuit and output circuit successively by PWM pulse width signal inputs; also include power-switching circuit; the power-switching circuit input connects power supply, output end connection high-speed isolated circuit, accurate reference voltage on-off circuit, low-pass filter circuit and zero correction circuit.The utility model has the advantages of small volume, easy to install and use.
Description
Technical field
It the utility model is related to transmitter technical field, and in particular to a kind of PWM pulse width signals DA changes miniature isolation and become
Send device.
Background technology
With the development of science and technology, the field such as industry spot, power monitoring, Medical Devices, experimental study is increasingly noted
The multi-functional and Miniaturization Design of weight product, to circuit level requirement also more and more higher.In automation control area, single-chip microcomputer
Application play more and more important effect.The application of Signal Matching is realized in the control device of general industry onsite application,
The D/A conversions of PWM pulse width signals must also be carried out exporting.If special turn is bought in the conversion of this output PWM pulse width signals
Exchange device is designed using discrete component, and not only price is high, volume is big, test and debugging is cumbersome, and use is also inconvenient.
The content of the invention
In order to solve the problems of the prior art, the utility model provides a kind of small volume, PWM arteries and veins easy to install and use
Bandwidth signals DA changes miniature isolating transmitter.
The technical scheme for realizing the utility model purpose is：
A kind of PWM pulse width signals DA changes miniature isolating transmitter, includes current limliting successively by PWM pulse width signal inputs
Pressure limited protection circuit, high-speed isolated circuit, accurate reference voltage on-off circuit, low-pass filter circuit, zero correction circuit, letter
Number amplifying circuit and output circuit, in addition to power-switching circuit, the power-switching circuit input connect power supply, output end
Connect high-speed isolated circuit, accurate reference voltage on-off circuit, low-pass filter circuit and zero correction circuit.
Further technical scheme, the power-switching circuit are that single supply turns government's power circuit.
Further technical scheme, the high-speed isolated circuit are optical coupling isolation circuit.
Further technical scheme, the power-switching circuit are made up of 4 metal-oxide half field effect transistors and two electric capacity
Negative supply.
Further technical scheme, a kind of PWM pulse width signals DA change miniature isolating transmitter and are encapsulated in housing,
Housing sets 7 pins, and the length of pin is 4.0mm, the long 15-20mm of housing, wide 8-12mm.
The beneficial effects of the utility model are：
The utility model optimizes circuit, and carrying out modularization to circuit function is integrated, and the application of circuit modular, which can improve, to be set
The control accuracy of standby signal shift control module, functions expanding is strong, and antijamming capability is good, and security reliability is good, intelligent journey
Degree is high, and mounting means is easy, and R＆D costs reduce, and product development cycle shortens, and lifts time to market (TTM), realizes end product
Miniaturization, facilitate user selection with maintenance change etc..
Current limiting pressure-limiting protection circuit of the present utility model carries out current limliting using resistance, and voltage-stabiliser tube carries out pressure limiting, can be effective
Protection circuit；High-speed isolated circuit is isolated to signal, accurate reference voltage on-off circuit to pwm signal carry out paraphase and
Accurate amplitude limit, low-pass filter circuit are filtered to signal.
The utility model uses integration of compact module mechanism（SIP7）, greatly reduce small product size, while ensure high
Conversion accuracy and linear, and good stability, reliability.The utility model will isolate change-over circuit, accurate benchmark electricity
Potential source on-off circuit, filter circuit, zero offset correcting circuit, single supply are become a full member negative electricity source circuit, signal amplification circuit, output
More set circuits such as circuit are integrated in same chip, are powered using single supply, are greatly simplified product processes, small size
SIP7 pin modular organizations become a reality, and save the cumbersome circuit design of user and debugging, greatly shorten the exploitation of consumer products
Cycle.
Brief description of the drawings
Fig. 1 is the electrical principle block diagram that a kind of PWM pulse width signals DA of the utility model changes miniature isolating transmitter；
Fig. 2 is the electrical principle that a kind of PWM pulse width signals DA changes miniature isolating transmitter in the utility model embodiment
Block diagram；
Fig. 3 is the circuit theory that a kind of PWM pulse width signals DA changes miniature isolating transmitter in the utility model embodiment
Figure；
Fig. 4 is the Power convert that a kind of PWM pulse width signals DA changes miniature isolating transmitter in the utility model embodiment
Circuit theory diagrams；
Fig. 5 is the surface structure that a kind of PWM pulse width signals DA changes miniature isolating transmitter in the utility model embodiment
Schematic diagram.
Embodiment
Fig. 1-Fig. 5 is to explain the utility model, but the utility model is not limited in the scope shown in Fig. 1-Fig. 5.
Old product is mainly had guide tracked and built using discrete component to realize, these small product sizes in the prior art
Greatly, using dual power supply, cost is high, manufacturing process trouble, client installation account for plate suqare it is big in-convenience in use, it is discrete
Element user designs debugging difficulty, and can not meet that client realizes product miniaturization demand.
As shown in Figure 1, Figure 2 and Figure 3, a kind of PWM pulse width signals DA changes miniature isolating transmitter, by PWM pulse width signals
Input rises includes current limiting pressure-limiting protection circuit, high-speed isolated circuit, accurate reference voltage on-off circuit, LPF successively
Circuit, zero correction circuit, signal amplification circuit and output circuit, in addition to power-switching circuit, the power-switching circuit
Input connects power supply, output end connection high-speed isolated circuit, accurate reference voltage on-off circuit, low-pass filter circuit and zero
Point calibration circuit.
Current limiting pressure-limiting protection circuit of the present utility model carries out current limliting using resistance, and voltage-stabiliser tube carries out pressure limiting, can be effective
Protection circuit；High-speed isolated circuit is isolated to signal, accurate reference voltage on-off circuit to pwm signal carry out paraphase and
Accurate amplitude limit, low-pass filter circuit are filtered to signal, main IC：6N137, TL432 etc..
Zero offset correcting circuit of the present utility model requires the signal collected to carry out plus-minus correction according to user, smart
Close reference guarantee of power offset output precision is accurate, reliable and stable, main IC：AD8512 etc..
Power supply of the present utility model is powered using outer for single supply, to ensure that zero signal can carry out plus-minus correction, therefore
Inside carries out reversion to voltage using efficient charge pump and realizes that amplifier positive-negative power is powered, main IC：TL431, XC6351.
The utility model has the advantages that small power consumption, efficiency high, using flexible.
High-speed isolated circuit of the present utility model uses high speed photo coupling isolation circuit, specifically uses 6N137 photo-couplers.
Become a full member negative electricity source circuit as shown in figure 4, the utility model power-switching circuit is single supply.
Further technical scheme, power-switching circuit is using 4 metal-oxide half field effect transistor MOSFET's of on-chip power
Voltage reversal charge pumping technique, outside are used only two electric capacity and form efficient negative supply, for providing negative pressure to amplifier
Power supply, realize signal zero bias correction.
The utility model technology is converted into positive-negative power using one group of single supply and is integrated on same chip, amplifies for signal
Change-over circuit provides power supply, realizes that zero signal adds and subtracts bias calibration, and product input circuit is provided with current limiting pressure-limiting protection circuit, passes through
High-speed isolated optocoupler U1 isolates to signal, and Q1 and U2 composition accurate reference voltage high-speed switching circuits enter to pwm signal
Row paraphase and accurate amplitude limit, low pass filter are filtered to signal, and U3A amplifiers are amplified to signal, zero offset electricity
Road carries out plus-minus correction to zero point, then output is amplified to signal by U3B.
Further technical scheme, it is encapsulated in as shown in figure 5, a kind of PWM pulse width signals DA changes miniature isolating transmitter
In housing, housing sets 7 pins, and the length of pin is 4.0mm, the long 15-20mm of housing, wide 8-12mm.
The utility model uses integration of compact module mechanism（SIP7）, greatly reduce small product size, while ensure high
Conversion accuracy and linear, and good stability, reliability.The utility model will isolate change-over circuit, accurate benchmark electricity
Potential source on-off circuit, filter circuit, zero offset correcting circuit, single supply are become a full member negative electricity source circuit, signal amplification circuit, output
More set circuits such as circuit are integrated in same chip, are powered using single supply, are greatly simplified product processes, small size
SIP7 pin modular organizations become a reality, and save the cumbersome circuit design of user and debugging, greatly shorten the exploitation of consumer products
Cycle.
Above-described embodiment is only the utility model specific embodiment, but is not limited to embodiment, all not depart from this reality
In the case of with new design, equivalent modification and the prior art addition done according to the application are accordingly to be regarded as the utility model technology model
Farmland.
Claims (6)
1. a kind of PWM pulse width signals DA changes miniature isolating transmitter, it is characterised in that：By PWM pulse width signal inputs according to
It is secondary including current limiting pressure-limiting protection circuit, high-speed isolated circuit, accurate reference voltage on-off circuit, low-pass filter circuit, zero point
Correcting circuit, signal amplification circuit and output circuit, in addition to power-switching circuit, the power-switching circuit input connection
Power supply, output end connection high-speed isolated circuit, accurate reference voltage on-off circuit, low-pass filter circuit and zero correction electricity
Road.
2. a kind of PWM pulse width signals DA according to claim 1 changes miniature isolating transmitter, it is characterised in that：It is described
Power-switching circuit is that single supply turns government's power circuit.
3. a kind of PWM pulse width signals DA according to claim 1 changes miniature isolating transmitter, it is characterised in that：It is described
High-speed isolated circuit is optical coupling isolation circuit.
4. a kind of PWM pulse width signals DA according to claim 1 changes miniature isolating transmitter, it is characterised in that：It is described
Power-switching circuit forms negative supply by 4 metal-oxide half field effect transistors and two electric capacity.
5. a kind of PWM pulse width signals DA according to claim 1-4 any one changes miniature isolating transmitter, its feature
It is：Described to send device to be encapsulated in housing, housing sets 7 pins.
6. a kind of PWM pulse width signals DA according to claim 5 changes miniature isolating transmitter, it is characterised in that：It is described
The length of pin is 4.0mm, the long 15-20mm of housing, wide 8-12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720596136.2U CN207010652U (en) | 2017-05-26 | 2017-05-26 | A kind of PWM pulse width signals DA changes miniature isolating transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720596136.2U CN207010652U (en) | 2017-05-26 | 2017-05-26 | A kind of PWM pulse width signals DA changes miniature isolating transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207010652U true CN207010652U (en) | 2018-02-13 |
Family
ID=61444774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720596136.2U Expired - Fee Related CN207010652U (en) | 2017-05-26 | 2017-05-26 | A kind of PWM pulse width signals DA changes miniature isolating transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207010652U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110647100A (en) * | 2019-10-16 | 2020-01-03 | 长沙中联恒通机械有限公司 | PVG electro-hydraulic proportional valve control system and control method |
| CN113009213A (en) * | 2021-02-02 | 2021-06-22 | 深圳车库电桩科技有限公司 | Voltage transmitter |
-
2017
- 2017-05-26 CN CN201720596136.2U patent/CN207010652U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110647100A (en) * | 2019-10-16 | 2020-01-03 | 长沙中联恒通机械有限公司 | PVG electro-hydraulic proportional valve control system and control method |
| CN110647100B (en) * | 2019-10-16 | 2020-10-27 | 长沙中联恒通机械有限公司 | PVG electro-hydraulic proportional valve control system and control method |
| CN113009213A (en) * | 2021-02-02 | 2021-06-22 | 深圳车库电桩科技有限公司 | Voltage transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180213 Termination date: 20190526 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |