CN207096857U - A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage - Google Patents
A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage Download PDFInfo
- Publication number
- CN207096857U CN207096857U CN201720749392.0U CN201720749392U CN207096857U CN 207096857 U CN207096857 U CN 207096857U CN 201720749392 U CN201720749392 U CN 201720749392U CN 207096857 U CN207096857 U CN 207096857U
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- constant
- circuit
- driving tube
- threshold voltage
- main control
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Abstract
It the utility model is related to semiconductor integrated circuit technical field, more particularly to a kind of amplifier output voltage clamper driving tube threshold voltage constant-current circuit, including main control module, clamp circuit, operational amplifier, constant current driving tube, feedback circuit, load power source and loading interfaces, main control module, clamp circuit, constant current driving tube and feedback circuit electrically connect with operational amplifier respectively, main control module and clamp circuit electrical connection, feedback circuit and the electrical connection of constant current driving tube, constant current driving tube and load power source electrically connect with loading interfaces respectively.Amplifier can export minimum voltage to the constant-current circuit being traditionally made up of operational amplifier when closed, and the driving tube on constant-current circuit has certain threshold voltage, amplifier must export the threshold voltage more than driving tube when constant-current circuit is again turned on, and so cause the response time of constant-current circuit to lengthen significantly.And said structure of the present utility model causes the response time of circuit to greatly reduce, the response speed of constant-current circuit is improved.
Description
Technical field
It the utility model is related to semiconductor integrated circuit technical field, and in particular to a kind of amplifier output voltage clamper is being driven
The constant-current circuit of dynamic pipe threshold voltage.
Background technology
At present, constant-current circuit has been applied to the every field of electron electric power, particularly visual light source lighting field.Typically
Ground, the constant-current circuit being made up of operational amplifier and driving tube, its stability is good, precision is high, is widely used.So
And such constant-current circuit is in each open, driving tube is required for a startup time, to allow the output of operational amplifier
Voltage climbs to the threshold voltage of driving tube, just driving tube can be made to open, turn on completely, and this starts the time by operational amplifier
The minimum voltage of output and the threshold voltage of driving tube determine jointly.For common amplifier, its output voltage climbs to drive
The threshold voltage time of dynamic pipe is relatively long, causes its response speed slow；Although high speed amplifier can reduce the response time,
High speed amplifier is expensive, is unfavorable for cost control.
Utility model content
The purpose of this utility model is：In view of the shortcomings of the prior art, provide a kind of by amplifier output voltage clamper
In the constant-current circuit of driving tube threshold voltage so that the response time of constant-current circuit on startup substantially reduces.
To achieve the above object, the utility model adopts the following technical scheme that：
A kind of amplifier output voltage clamper driving tube threshold voltage constant-current circuit, including main control module, clamp circuit,
Operational amplifier, constant current driving tube, feedback circuit, load power source and loading interfaces, the main control module, the clamp circuit,
The constant current driving tube and the feedback circuit electrically connect with the operational amplifier respectively, the main control module and the clamper
Circuit electrically connects, the feedback circuit and constant current driving tube electrical connection, the constant current driving tube and the load power source point
Do not electrically connected with the loading interfaces.
As a kind of improvement of the present utility model, the main control module is single-chip microcomputer, and the clamp circuit is clamp voltage
Equal to the clamp circuit of constant current driving tube threshold voltage, the constant current driving tube is the metal-oxide-semiconductor for having certain threshold value.
As a kind of improvement of the present utility model, when the load power source is opened, the main control module is to operation amplifier
Device provides a reference voltage, and the operational amplifier can export a control signal to control constant current to drive according to this magnitude of voltage
Dynamic pipe, now the constant current driving tube conducting provide electric current for load.
As a kind of improvement of the present utility model, when the load power source is closed, the constant current driving tube is not turned on, institute
Control signal can be sent to clamp circuit by stating main control module, make its normal work, and disconnect the control to operational amplifier；Together
When, the clamp circuit can be the control terminal voltage clamp of the constant current driving tube in its threshold voltage position.
The beneficial effects of the utility model are：The utility model include main control module, clamp circuit, operational amplifier,
Constant current driving tube, feedback circuit, load power source and loading interfaces, the main control module, the clamp circuit, constant current driving
Pipe and the feedback circuit electrically connect with the operational amplifier respectively, the main control module and clamp circuit electrical connection,
The feedback circuit and constant current driving tube electrical connection, the constant current driving tube and the load power source respectively with the load
Interface electrically connects.Amplifier can export minimum voltage to the constant-current circuit being traditionally made up of operational amplifier when closed, and permanent
Driving tube on current circuit has certain threshold voltage, and amplifier must export the threshold more than driving tube when constant-current circuit is again turned on
Threshold voltage, the response time of constant-current circuit is so caused to lengthen significantly.Now propose a kind of amplifier output voltage clamper in driving tube
The constant-current circuit of threshold voltage so that the response time of circuit greatly reduces, and improves the response speed of constant-current circuit.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, forms one of the present utility model
Point, exemplary embodiment of the present utility model and its illustrate be used for explain the utility model, do not form to the utility model
Improper restriction.In the accompanying drawings：
Fig. 1 is structural representation of the present utility model.
Embodiment
Some vocabulary has such as been used to censure specific components among specification and claim.Those skilled in the art should
It is understood that hardware manufacturer may call same component with different nouns.This specification and claims are not with name
The difference of title is used as the mode for distinguishing component, but is used as the criterion of differentiation with the difference of component functionally.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer in acceptable error range, those skilled in the art can be described within a certain error range solution
Technical problem, basically reach the technique effect.
In description of the present utility model, it is to be understood that term " on ", " under ", "front", "rear", "left", "right",
The orientation or position relationship of the instructions such as level " are based on orientation shown in the drawings or position relationship, are for only for ease of description originally
Utility model and simplifying describes, rather than instruction or implies that signified device or element must have specific orientation, with specific
Azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the utility model.
The utility model is described in further detail below in conjunction with accompanying drawing, but not as to restriction of the present utility model.
As shown in figure 1, a kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage, including main control module
1st, clamp circuit 2, operational amplifier 3, constant current driving tube 4, feedback circuit 5, load power source 6 and loading interfaces 7, main control module 1,
Clamp circuit 2, constant current driving tube 4 and feedback circuit 5 electrically connect with operational amplifier 3 respectively, main control module 1 and clamp circuit 2
Electrical connection, feedback circuit 5 and constant current driving tube 4 electrically connect, and constant current driving tube 4 and load power source 6 are electrically connected with loading interfaces 7 respectively
Connect.
Main control module 1 of the present utility model is single-chip microcomputer, and clamp circuit 2 is the clamp circuit of 4V benchmark, constant current driving tube 4
It is the metal-oxide-semiconductor that threshold value is 4V, loading interfaces connect light source as load.
Operation principle of the present utility model is：When constant-current circuit normal work, load power source 6 is opened, and single-chip microcomputer passes through
D/A converter module provides a reference voltage to operational amplifier 3, and operational amplifier 3 exports a control according to this magnitude of voltage
Signal processed controls metal-oxide-semiconductor, and now metal-oxide-semiconductor conducting provides electric current for light source.And feedback circuit 5 can then detect source current
Size, and operational amplifier 3 is fed back to, it is adjusted in real time, circuit is constantly in constant current state.Meanwhile single-chip microcomputer
Send a control signal to close clamp circuit 2, it is not had an impact constant-current circuit.
When constant-current circuit is closed, load power source 6 is closed, and metal-oxide-semiconductor is not turned on, and single-chip microcomputer can send control to clamp circuit
Signal, make its normal work, and disconnect the control to operational amplifier 3.Now, clamp circuit can be the control terminal of metal-oxide-semiconductor
Voltage clamp is in its threshold voltage 4V positions, i.e., in the constant-current circuit down periods, its control terminal stores its threshold value to metal-oxide-semiconductor always
Voltage 4V.
When constant-current circuit is again turned on, single-chip microcomputer sends a control signal and closes clamp circuit 2 first, disconnects it
Influence to constant-current circuit.Meanwhile single-chip microcomputer provides a reference voltage value by D/A converter module to operational amplifier 3,
For controlling the size of produced Constant Electric Current flow valuve.And when constant-current circuit is closed, its control terminal stores it due to metal-oxide-semiconductor
Threshold voltage 4V, therefore when metal-oxide-semiconductor is opened, its control terminal voltage is not to be climbed since the minimum voltage of operational amplifier 3
Its threshold voltage 4V is raised to, but is directly controlled by the threshold voltage 4V stored.
It should be noted that：Said structure of the present utility model eliminates the time-to-climb of driving tube control terminal voltage, carries
The high response speed of constant-current circuit.
Some preferred embodiments of the present utility model have shown and described in described above, but as previously described, it should be understood that
The utility model is not limited to form disclosed herein, is not to be taken as the exclusion to other embodiment, and can be used for
Various other combinations, modification and environment, and above-mentioned teaching or correlation can be passed through in utility model contemplated scope described herein
The technology or knowledge in field are modified.And the change and change that those skilled in the art are carried out do not depart from spirit of the present utility model
And scope, then all should be in the protection domain of the appended claims for the utility model.
Claims (2)
1. a kind of amplifier output voltage clamper is in the constant-current circuit of driving tube threshold voltage, it is characterised in that：Including main control module,
Clamp circuit, operational amplifier, constant current driving tube, feedback circuit, load power source and loading interfaces, it is the main control module, described
Clamp circuit, the constant current driving tube and the feedback circuit electrically connect with the operational amplifier respectively, the main control module
Electrically connected with the clamp circuit, the feedback circuit and constant current driving tube electrical connection, the constant current driving tube and described
Load power source electrically connects with the loading interfaces respectively.
2. amplifier output voltage clamper according to claim 1 exists in the constant-current circuit of driving tube threshold voltage, its feature
In：The main control module is single-chip microcomputer, and the clamp circuit is the clamper electricity that clamp voltage is equal to constant current driving tube threshold voltage
Road, the constant current driving tube are the metal-oxide-semiconductors for having certain threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720749392.0U CN207096857U (en) | 2017-06-26 | 2017-06-26 | A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720749392.0U CN207096857U (en) | 2017-06-26 | 2017-06-26 | A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207096857U true CN207096857U (en) | 2018-03-13 |
Family
ID=61553891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720749392.0U Withdrawn - After Issue CN207096857U (en) | 2017-06-26 | 2017-06-26 | A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207096857U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107193314A (en) * | 2017-06-26 | 2017-09-22 | 广东奥普特科技股份有限公司 | A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage |
-
2017
- 2017-06-26 CN CN201720749392.0U patent/CN207096857U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107193314A (en) * | 2017-06-26 | 2017-09-22 | 广东奥普特科技股份有限公司 | A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180313 Effective date of abandoning: 20181214 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180313 Effective date of abandoning: 20181214 |