CN205754222U - Multichannel amplifying circuit - Google Patents
Multichannel amplifying circuit Download PDFInfo
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- CN205754222U CN205754222U CN201620671372.1U CN201620671372U CN205754222U CN 205754222 U CN205754222 U CN 205754222U CN 201620671372 U CN201620671372 U CN 201620671372U CN 205754222 U CN205754222 U CN 205754222U
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- diode
- power transistor
- signal
- fet power
- amplifying circuit
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Abstract
The utility model discloses a kind of multichannel amplifying circuit, aim to provide strong and that effectively output positive and negative electrode the is controlled multichannel amplifying circuit driving signal of a kind of capacity of resisting disturbance, solve interference problem and the problem of signal driving, its drip irrigation device is to use the component built-up circuit structures such as photoelectrical coupler, fet power transistor, the first diode, the second diode, has reached to improve capacity of resisting disturbance and the effect of two-way signaling transmission.
Description
Technical field
This utility model relates to PLC signal processing circuit, particularly to multichannel amplifying circuit.
Background technology
Having multiple circuit module in the inside of PLC, each functional module is combined into a FPGA
Controller, the various switches used in production process, button, the entering apparatus such as sensor are directly connected to PLC input interface electricity
Lu Shang, for preventing owing to contact chatter or disturbing pulse cause the input signal of mistake, input interface circuit must have the strongest
Capacity of resisting disturbance.
And on the basis of based on capacity of resisting disturbance, the driving force of its circuit need to improve, the driving on existing PLC
All the signal of telecommunication of output cathode on port, and can not effective output negative pole signal, accordingly, it would be desirable to improving in this respect.
Utility model content
The deficiency existed for prior art, the purpose of this utility model is to provide capacity of resisting disturbance and exports by force and effectively
The multichannel amplifying circuit driving signal that positive and negative electrode is controlled.
Above-mentioned technical purpose of the present utility model has the technical scheme that a kind of multichannel amplifies electricity
Road, including photoelectrical coupler, also includes fet power transistor, the first diode, the second diode, the first resistance and second
Resistance；
The anode of described photoelectrical coupler is used as signal input part, and negative electrode is in order to connect common port, and colelctor electrode is in order to connect
First power supply, emitter stage is in order to connect the grid of fet power transistor；
The drain electrode of described fet power transistor connects the negative electrode of the first diode and the anode of the second diode and makees
For signal output part；
After the anode of described first diode and the negative electrode of the second diode connect and in order to receive positive signal；
The source electrode of described fet power transistor is in order to receive negative signal.
By above-mentioned setting, when input signal is input to photoelectrical coupler, trigger photoelectrical coupler conducting, such that it is able to have
The communication channel of effect controlling filed effect power transistor, such that it is able to be operated on off state or magnifying state；It is operated in out
The when of off status, fet power transistor cutoff, now positive signal carries out the output of signal, field by the first diode
The when of the conducting of effect power transistor, now negative signal is exported by fet power transistor, such that it is able to control
The selectivity output of positive signal processed and negative signal, improves driving force；Fet power transistor is operated in magnifying state
When see, due to photoelectrical coupler output signal magnitude can with the width of controlling filed effect power transistor communication channel,
Such that it is able to control the size of output electric current.
Can be preferably as concrete scheme of the present utility model: also include the second resistance and the 3rd resistance, described second
Resistance and the first Diode series；
3rd resistance one end connects the grid of fet power transistor, and the other end connects the source of fet power transistor
Pole.
By above-mentioned setting, the second resistance plays the effect of current limliting and voltage-regulation, and the 3rd resistance forms fet power
Voltage difference between grid and the source electrode of transistor, consequently facilitating the grid of fet power transistor utilizes its voltage to control
System.
Can be preferably as concrete scheme of the present utility model: described first diode is LED.
By above-mentioned setting, owing to LED is to have luminescent effect forward conduction when, therefore can serve to indicate that
The direction of signal transmission and duty.
Can be preferably as concrete scheme of the present utility model: described photoelectrical coupler is TLP120 type.
By above-mentioned setting, owing to the components and parts on market are of a great variety, its respective self electrical characteristic is the most each
Variant, select the photoelectrical coupler of this kind of model, the input of its signal can be 24V voltage signal, safe and reliable.
Can be preferably as concrete scheme of the present utility model: described fet power transistor is IRF540 type.
By above-mentioned setting, select the fet power transistor of this model, due in parallel reversely in its internal structure
Diode, so having the most restorative and stability, the response speed being operated on off state significantly improves.
Can be preferably as concrete scheme of the present utility model: the anode of described photoelectrical coupler is also in series with the first electricity
Resistance.
By above-mentioned setting, the anode of photoelectrical coupler can be played the effect of current limliting by the first resistance.
In sum, this utility model has the advantages that raising capacity of resisting disturbance, and effectively output positive and negative electrode can
The driving signal of control, fast response time, has duty instruction function.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the present embodiment；
Fig. 2 is first power circuit diagram of the present embodiment.
Reference: U1, photoelectrical coupler；Q1, fet power transistor；D1, the first diode；D2, the two or two pole
Pipe；R1, the first resistance；R2, the second resistance；R3, the 3rd resistance；R4, the 4th resistance；VDD, the first power supply；IN1, signal input
End；OUT1, signal output part；D3, Zener diode；V+, positive signal；V-, negative signal；COM, common port.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail.
Embodiment: as it is shown in figure 1, a kind of multichannel amplifying circuit, including photoelectrical coupler U1, fet power transistor
Q1, the first diode D1, the second diode D2, the first resistance R1, the second resistance R2 and the 3rd resistance R3.
Its circuit connection structure is as follows: the anode of photoelectrical coupler U1 is used as signal input part, the sun of photoelectrical coupler U1
Pole is also in series with the first resistance R1, and the negative electrode of photoelectrical coupler U1 is in order to connect common port COM, and colelctor electrode is in order to connect the first electricity
Source VDD, emitter stage is in order to connect the grid of fet power transistor Q1；The drain electrode of fet power transistor Q1 connects first
The negative electrode of diode D1 and the anode of the second diode D2 as signal output part OUT1；The anode of the first diode D1 and
After the negative electrode of two diode D2 connects and in order to receive positive signal V+；The source electrode of fet power transistor Q1 is negative in order to receive
Pole signal V-.Second resistance R2 and the first diode D1 series connection；3rd resistance R3 one end connects fet power transistor Q1's
Grid, the other end connects the source electrode of fet power transistor Q1.Wherein, the first diode D1 is LED, photoelectrical coupler U1
Electing TLP120 type as, fet power transistor Q1 elects IRF540 type as.
As in figure 2 it is shown, the other end that one end of the 4th resistance R4 connects positive signal V+, the 4th resistance R4 connects voltage stabilizing two
Pole pipe D3 negative electrode, Zener diode D3 anode connects negative signal V-, the node between the 4th resistance R4 and Zener diode D3
In order to export the first power vd D.
Operation principle, common port COM can connect earth terminal, and the electric pressure of signal input part can be 24V, works as photoelectricity
The when that bonder U1 receiving input signal, driving field effect power transistor Q1 is operated on off state, does not drive
Signal then fet power transistor Q1 ends, and the output that now positive signal V+ carries out signal by the first diode D1 has
Driving signal then fet power transistor Q1 conducting, now negative signal V-carries out defeated by fet power transistor Q1
Go out, such that it is able to control the selectivity output of positive signal V+ and negative signal V-, improve driving force.
Photoelectrical coupler U1 is utilized to improve capacity of resisting disturbance.Photoelectrical coupler U1 operation principle is: light emitting diode drives
When streaming current flows through, conducting luminescence, phototriode receives light, cut-off become conducting.Sending out in photoelectrical coupler U1
Optical diode is current driving element, and enough energy will be had to drive.Although and disturb the some magnitudes of voltage of signal the highest, but
Energy is less, it is impossible to make LEDs ON luminous, so interference signal can not enter, it is achieved that electric isolution.
When being connected with PLC, owing to fet power transistor Q1 self is with the presence of leakage current, or circuit it cannot be guaranteed that
Fet power transistor Q1 reliably ends and is in magnifying state so that even if when cut-off, still having a little electric leakage
Stream flows through, when this current value is more than 1.3mA, it is possible to cause PLC input circuit generation misoperation.So being provided with the three or two
Pole pipe shunts, and makes inflow output electric current less than 1.3mA.
By above-mentioned circuit structure, can be extended to multiple, thus form the signal transmission of multichannel.
This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model
The present embodiment can be made after reading this specification by field technique personnel as required does not has the amendment of creative contribution, but
As long as all being protected by Patent Law in right of the present utility model.
Claims (6)
1. a multichannel amplifying circuit, including photoelectrical coupler (U1), it is characterised in that: also include fet power transistor
(Q1), the first diode (D1), the second diode (D2)；
The anode of described photoelectrical coupler (U1) is used as signal input part, negative electrode in order to connect common port (COM), colelctor electrode in order to
Connecting the first power supply (VDD), emitter stage is in order to connect the grid of fet power transistor (Q1)；
The drain electrode of described fet power transistor (Q1) connects the negative electrode of the first diode (D1) and the second diode (D2)
Anode as signal output part (OUT1)；
After the anode of described first diode (D1) and the negative electrode of the second diode (D2) connect and in order to receive positive signal (V
+)；
The source electrode of described fet power transistor (Q1) is in order to receive negative signal (V-).
Multichannel amplifying circuit the most according to claim 1, it is characterised in that: also include the second resistance (R2) and the 3rd resistance
(R3), described second resistance (R2) is connected with the first diode (D1)；
3rd resistance (R3) one end connects the grid of fet power transistor (Q1), and the other end connects fet power transistor
(Q1) source electrode.
Multichannel amplifying circuit the most according to claim 2, it is characterised in that: described first diode (D1) is LED.
Multichannel amplifying circuit the most according to claim 3, it is characterised in that: described photoelectrical coupler (U1) is TLP120
Type.
Multichannel amplifying circuit the most according to claim 4, it is characterised in that: described fet power transistor (Q1) is
IRF540 type.
Multichannel amplifying circuit the most according to claim 1, it is characterised in that: the anode of described photoelectrical coupler (U1) is also gone here and there
It is associated with the first resistance (R1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620671372.1U CN205754222U (en) | 2016-06-25 | 2016-06-25 | Multichannel amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620671372.1U CN205754222U (en) | 2016-06-25 | 2016-06-25 | Multichannel amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205754222U true CN205754222U (en) | 2016-11-30 |
Family
ID=57383483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620671372.1U Active CN205754222U (en) | 2016-06-25 | 2016-06-25 | Multichannel amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205754222U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110620557A (en) * | 2018-06-20 | 2019-12-27 | 小仓将希 | High voltage output amplifier |
-
2016
- 2016-06-25 CN CN201620671372.1U patent/CN205754222U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110620557A (en) * | 2018-06-20 | 2019-12-27 | 小仓将希 | High voltage output amplifier |
| CN110620557B (en) * | 2018-06-20 | 2023-07-28 | 小仓将希 | High voltage output amplifier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |