CN109029676A - A kind of soft switch circuit applied on electronic scale - Google Patents
A kind of soft switch circuit applied on electronic scale Download PDFInfo
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- CN109029676A CN109029676A CN201811020893.0A CN201811020893A CN109029676A CN 109029676 A CN109029676 A CN 109029676A CN 201811020893 A CN201811020893 A CN 201811020893A CN 109029676 A CN109029676 A CN 109029676A
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- resistor
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- channel mos
- mos pipe
- electronic scale
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- 230000005611 electricity Effects 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000004438 eyesight Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
Abstract
A kind of soft switch circuit applied on electronic scale, comprising: first switch, second switch, the first wholly-controled device, the second wholly-controled device, first resistor and second resistance；It is connected between direct-current input power supplying and common end after the first resistor and second switch series connection；It is connected between DC output power and common end after the second resistance and first switch series connection；First wholly-controled device is connected between the direct-current input power supplying and the DC output power；Second wholly-controled device is connected between the first resistor and the second resistance；First wholly-controled device is connected with second wholly-controled device.The present invention can guarantee that electronic scale operating voltage is normal and can extend the service life of electronic scale.
Description
Technical field
The present invention relates to electronic scale switching circuit technical field, especially a kind of Sofe Switch electricity applied on electronic scale
Road.
Background technique
Referring to Fig. 1, it is ship type ON-OFF control circuit, ship that the switching circuit of electronic scale currently on the market, which substantially uses,
Type switch S1 is pressed, and electronic scale is powered on；Ship type switch S1 is opened, and electronic scale power-off stops working, and this switching circuit is deposited
In following problem:
(1) dampness, switch when ship type switch meeting corrosion oxidation causes to be switched on are easy when electronic scale uses on the market
Conducting resistance becomes larger, so that the voltage being added on ship type switch increases, and being added in the voltage on electronic scale reduces, and eventually leads to
Electronic scale voltage is low often work it is abnormal；
(2) switch of ship type switch guarantees mainly by spring, the more springs of on-off times can fatigue, lead to switch life
Shorten.
Shown in Figure 2, there is also a small amount of soft switch circuit, main control chip U2 often has electronic scale currently on the market
Electricity, switch S1 are pressed, and main control chip U2 enters sleep state, and peripheral circuit stops working, and Overall Power Consumption only has tens microamperes, several
Not power consumption, then it is assumed that shutdown；Switch S2, which is pressed, wakes up main control chip U2 work, and peripheral circuit can work, then it is assumed that
It is switched on, there are the following problems for this switching circuit: only Overall Power Consumption being fallen too low when shutdown, but exist centainly
Power consumption；It is not just reached requirement if there is the abnormal needs of chip appearance are fully powered-off to realize to restart.
Summary of the invention
It is a primary object of the present invention to propose a kind of soft switch circuit applied on electronic scale, electronic scale work can guarantee
Make voltage normally and the service life of electronic scale can be extended.
The present invention adopts the following technical scheme:
A kind of soft switch circuit applied on electronic scale, comprising: first switch, second switch, the first wholly-controled device,
Second wholly-controled device, first resistor and second resistance；Direct current input is connected to after the first resistor and second switch series connection
Between power supply and common end；It is connected between DC output power and common end after the second resistance and first switch series connection；
First wholly-controled device is connected between the direct-current input power supplying and the DC output power；Second full-control type
Device is connected between the first resistor and the second resistance；First wholly-controled device and the second full-control type device
Part is connected.
Preferably, first wholly-controled device is N-channel MOS pipe；Second wholly-controled device is NPN triode.
Preferably, the soft switch circuit further include: 3rd resistor and the 4th resistance；The first resistor and second switch
It is connected between direct-current input power supplying and common end after series connection；One end and institute of described 3rd resistor one end and the first resistor
The one end for stating second switch is respectively connected with, the other end and the grid of the N-channel MOS pipe and the current collection of the NPN triode
Pole is respectively connected with；The source electrode of the N-channel MOS pipe is respectively connected with the other end and direct-current input power supplying of the first resistor
It connects；The second resistance is connected between the drain electrode of the N-channel MOS pipe and the base stage of the NPN triode；Described first opens
It is connected between the base stage and common end of the NPN triode after pass and the 4th resistor coupled in parallel；The N-channel MOS pipe
Drain electrode is connected with the DC output power；The emitter of the NPN triode is connected with the common end.
Preferably, first wholly-controled device is the first N-channel MOS pipe；Second wholly-controled device is the 2nd N ditch
Road metal-oxide-semiconductor.
Preferably, the soft switch circuit further include: 3rd resistor；It is connected after the first resistor and second switch series connection
Between direct-current input power supplying and common end；One end and the second switch of described 3rd resistor one end and the first resistor
One end be respectively connected with, the grid of the other end and the first N-channel MOS pipe and the source electrode point of the second N-channel MOS pipe
It is not connected；The source electrode of the first N-channel MOS pipe is respectively connected with the other end and direct-current input power supplying of the first resistor
It connects；The second resistance is connected between the drain electrode of the first N-channel MOS pipe and the grid of the second N-channel MOS pipe；
The first switch is connected between the grid and common end of the second N-channel MOS pipe；The first N-channel MOS pipe
Drain electrode be connected with the DC output power；The drain electrode of the second N-channel MOS pipe is connected with the common end.
Preferably, first wholly-controled device is PNP triode；Second wholly-controled device is NPN triode.
Preferably, the soft switch circuit further include: 3rd resistor and the 4th resistance；The first resistor and second switch
It is connected between direct-current input power supplying and common end after series connection；Described 3rd resistor one end and one end of the first resistor, institute
The collector of one end and the NPN triode for stating second switch is respectively connected with, the base stage of the other end and the PNP triode
It is connected；The emitter of the PNP triode and the other end and direct-current input power supplying of the first resistor are respectively connected with；Institute
Second resistance is stated to be connected between the collector of the PNP triode and the base stage of the NPN triode；The first switch and
It is connected between the base stage and common end of the NPN triode after 4th resistor coupled in parallel；The collector of the PNP triode
It is connected with the DC output power；The emitter of the NPN triode is connected with the common end.
Preferably, first wholly-controled device is PNP triode；Second wholly-controled device is N-channel MOS pipe.
Preferably, the soft switch circuit further include: 3rd resistor；It is connected after the first resistor and second switch series connection
Between direct-current input power supplying and common end；Described 3rd resistor one end and one end of the first resistor, the second switch
One end and the source electrode of the N-channel MOS pipe be respectively connected with, the other end is connected with the base stage of the PNP triode；It is described
The emitter of PNP triode and the other end and direct-current input power supplying of the first resistor are respectively connected with；The second resistance
It is connected between the collector of the PNP triode and the grid of the N-channel MOS pipe；The first switch is connected to the N
Between the grid and common end of channel MOS tube；The collector of the PNP triode is connected with the DC output power；Institute
The drain electrode for stating N-channel MOS pipe is connected with the common end.
Preferably, the first switch includes button switch or key switch；The second switch include button switch or
Key switch.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) electronic scale is easy dampness, switch conduction electricity when ship type switch meeting corrosion oxidation causes to be switched on the market
Resistive is big, so that the voltage being added on switch increases, and is added in the reduction of the voltage on electronic scale, causes electronic scale voltage low often
It works abnormal；And soft switch circuit of the invention is used to pass through first switch, second switch, the first wholly-controled device and second
The combination of wholly-controled device can prevent this phenomenon completely；
(2) switch of ship type switch guarantees mainly by spring, the more springs of on-off times can fatigue, so switch life
It is limited；And soft switch circuit of the invention realizes on-off by wholly-controled device, the service life is long；
(3) soft switch circuit at present on the market substantially falls too low Overall Power Consumption, and micro energy lose, which is equivalent to, not to be consumed
Electricity is realized, is judged to shutting down；It is not just reached requirement if there is the abnormal needs of chip appearance are fully powered-off to realize to restart.
And soft switch circuit of the invention is as ship type switching circuit, fully powered-off, complete machine zero-power when shutdown, when booting all cores
Piece can be switched on firmly.
The above description is only an overview of the technical scheme of the present invention, in order to more clearly understand technology hand of the invention
Section, so as to be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention
It can be more clearly understood, be exemplified below a specific embodiment of the invention.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
Above-mentioned and other purposes of the invention, advantages and features.
Detailed description of the invention
Fig. 1 is the ship type switching circuit of the prior art applied on electronic scale；
Fig. 2 is the soft switch circuit of the prior art applied on electronic scale；
Fig. 3 is the soft switch circuit of the embodiment of the present invention one applied on electronic scale；
Fig. 4 is the soft switch circuit of the embodiment of the present invention two applied on electronic scale；
Fig. 5 is the soft switch circuit of the embodiment of the present invention three applied on electronic scale；
Fig. 6 is the soft switch circuit of the embodiment of the present invention four applied on electronic scale.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment 1
It is shown in Figure 3, a kind of soft switch circuit applied on electronic scale of the present invention, comprising: first switch S1, second
Switch S2, N-channel MOS pipe Q1, NPN triode Q2, first resistor R1 and second resistance R2；The first resistor R1 and second is opened
It is connected between direct-current input power supplying VCC and common end after closing S2 series connection；After the second resistance R2 and first switch S1 series connection
It is connected between DC output power VDD and common end；The N-channel MOS pipe Q1 be connected to the direct-current input power supplying VCC and
Between the DC output power VDD；The NPN triode Q2 be connected to the first resistor R1 and second resistance R2 it
Between；The N-channel MOS pipe Q1 is connected with the NPN triode Q2.
In the present embodiment, the soft switch circuit further include: 3rd resistor R3 and the 4th resistance R4.
The soft switch circuit specifically includes: direct current input is connected to after the first resistor R1 and second switch S2 series connection
Between power supply VCC and common end；One end and the second switch S2 of the one end the 3rd resistor R3 and the first resistor R1
One end be respectively connected with, the grid of the other end and the N-channel MOS pipe Q1 and the collector of the NPN triode Q2 are distinguished
It is connected；The source electrode of the N-channel MOS pipe Q1 and the other end and direct-current input power supplying VCC of the first resistor R1 distinguish phase
Connection；The second resistance R2 is connected between the drain electrode of the N-channel MOS pipe Q1 and the base stage of the NPN triode Q2；Institute
It is connected between the base stage and common end of the NPN triode Q2 after stating first switch S1 and the 4th resistance R4 parallel connection；Institute
The drain electrode for stating N-channel MOS pipe Q1 is connected with the DC output power VDD；The emitter of the NPN triode Q2 with it is described
Common end is connected.
Specifically, the direct-current input power supplying VCC can provide for electronic scale internal cell, it can also be by external dc electricity
Source provides, and the embodiment of the present invention is not particularly limited.The DC output power VDD is electronic scale supply voltage.
Specifically, the first switch S1 includes but is not limited to button switch or key switch, as long as can be realized this hair
The switch of improving eyesight, the embodiment of the present invention are not particularly limited.The second switch S2 include but is not limited to button switch or
Key switch, as long as can be realized the object of the invention switch, the present invention is not particularly limited.
Application principle of the Sofe Switch of the present invention on electronic scale is as follows: pressing the second switch S2, the N-channel MOS
Pipe Q1 conducting, the NPN triode Q2 are also switched on, and the DC output power vdd voltage is normal, electronic scale energization booting work
Make；The first switch S1 is pressed, the N-channel MOS pipe Q1 is not turned on, and the NPN triode Q2 is also not turned on, direct current output
Power vd D voltage drops to 0, electronic scale power-off shutdown.
Embodiment 2
It is shown in Figure 4, a kind of soft switch circuit applied on electronic scale, comprising: first switch S1, second switch
S2, the first N-channel MOS pipe Q1, the second N-channel MOS pipe Q2, first resistor R1 and second resistance R2；The first resistor R1 and
It is connected between direct-current input power supplying VCC and common end after second switch S2 series connection；The second resistance R2 and first switch S1
It is connected to after series connection between DC output power VDD and common end；It is defeated that the first N-channel MOS pipe Q1 is connected to the direct current
Enter between power supply VCC and the DC output power VDD；The second N-channel MOS pipe Q2 be connected to the first resistor R1 and
Between the second resistance R2；The first N-channel MOS pipe Q1 is connected with the second N-channel MOS pipe Q2.
In the present embodiment, the soft switch circuit further include: 3rd resistor R3.
The soft switch circuit specifically includes: direct current input is connected to after the first resistor R1 and second switch S2 series connection
Between power supply VCC and common end；One end and the second switch S2 of the one end the 3rd resistor R3 and the first resistor R1
One end be respectively connected with, the other end and the grid of the first N-channel MOS pipe Q1 and the source of the second N-channel MOS pipe Q2
Pole is respectively connected with；The source electrode of the first N-channel MOS pipe Q1 and the other end and direct-current input power supplying of the first resistor R1
VCC is respectively connected with；The second resistance R2 be connected to the first N-channel MOS pipe Q1 drain electrode and second N-channel
Between the grid of metal-oxide-semiconductor Q2；The first switch S1 is connected to grid and the common end of the second N-channel MOS pipe Q2
Between；The drain electrode of the first N-channel MOS pipe Q1 is connected with the DC output power VDD；The second N-channel MOS pipe
The drain electrode of Q2 is connected with the common end.
Specifically, the direct-current input power supplying VCC can provide for electronic scale internal cell, it can also be by external dc electricity
Source provides, and the embodiment of the present invention is not particularly limited.The DC output power VDD is electronic scale supply voltage.
Specifically, the first switch S1 includes but is not limited to button switch or key switch, as long as can be realized this hair
The switch of improving eyesight, the embodiment of the present invention are not particularly limited.The second switch S2 include but is not limited to button switch or
Key switch, as long as can be realized the object of the invention switch, the present invention is not particularly limited.
Application principle of the Sofe Switch of the present invention on electronic scale is as follows: pressing the second switch S2, first N-channel
Metal-oxide-semiconductor Q1 conducting, the second N-channel MOS pipe Q2 are also switched on, and the DC output power vdd voltage is normal, and electronic scale is powered
Be switched on work；The first switch S1 is pressed, the first N-channel MOS pipe Q1 is not turned on, the second N-channel MOS pipe Q2
It is not turned on, DC output power vdd voltage drops to 0, electronic scale power-off shutdown.
Embodiment 3
It is shown in Figure 5, a kind of soft switch circuit applied on electronic scale of the present invention, comprising: first switch S1, second
Switch S2, PNP triode Q1, NPN triode Q2, first resistor R1 and second resistance R2；The first resistor R1 and second is opened
It is connected between direct-current input power supplying VCC and common end after closing S2 series connection；After the second resistance R2 and first switch S1 series connection
It is connected between DC output power VDD and common end；The PNP triode Q1 be connected to the direct-current input power supplying VCC and
Between the DC output power VDD；The NPN triode Q2 be connected to the first resistor R1 and second resistance R2 it
Between；The PNP triode Q1 is connected with the NPN triode Q2.
In the present embodiment, the soft switch circuit further include: 3rd resistor R3 and the 4th resistance R4.
The soft switch circuit specifically includes: direct current input is connected to after the first resistor R1 and second switch S2 series connection
Between power supply VCC and common end；One end of the one end the 3rd resistor R3 and the first resistor R1, the second switch S2
The collector of one end and the NPN triode Q2 are respectively connected with, and the other end is connected with the base stage of the PNP triode Q1；
The emitter of the PNP triode Q1 and the other end and direct-current input power supplying VCC of the first resistor R1 are respectively connected with；Institute
Second resistance R2 is stated to be connected between the collector of the PNP triode Q1 and the base stage of the NPN triode Q2；Described first
It is connected between the base stage and common end of the NPN triode Q2 after switch S1 and the 4th resistance R4 is in parallel；The PNP tri-
The collector of pole pipe Q1 is connected with the DC output power VDD；The emitter of the NPN triode Q2 and the common end
It is connected.
Specifically, the direct-current input power supplying VCC can provide for electronic scale internal cell, it can also be by external dc electricity
Source provides, and the embodiment of the present invention is not particularly limited.The DC output power VDD is electronic scale supply voltage.
Specifically, the first switch S1 includes but is not limited to button switch or key switch, as long as can be realized this hair
The switch of improving eyesight, the embodiment of the present invention are not particularly limited.The second switch S2 include but is not limited to button switch or
Key switch, as long as can be realized the object of the invention switch, the present invention is not particularly limited.
Application principle of the Sofe Switch of the present invention on electronic scale is as follows: pressing the second switch S2, the PNP triode
Q1 conducting, the NPN triode Q2 are also switched on, and the DC output power vdd voltage is normal, electronic scale energization booting work；
The first switch S1 is pressed, the PNP triode Q1 is not turned on, and the NPN triode Q2 is also not turned on, DC output power
Vdd voltage drops to 0, electronic scale power-off shutdown.
Embodiment 4
It is shown in Figure 6, a kind of soft switch circuit applied on electronic scale, comprising: first switch S1, second switch
S2, PNP triode Q1, N-channel MOS pipe Q2, first resistor R1 and second resistance R2；The first resistor R1 and second switch S2
It is connected to after series connection between direct-current input power supplying VCC and common end；It is connected after the second resistance R2 and first switch S1 series connection
Between DC output power VDD and common end；The PNP triode Q1 is connected to the direct-current input power supplying VCC and described
Between DC output power VDD；The N-channel MOS pipe Q2 is connected between the first resistor R1 and the second resistance R2；
The PNP triode Q1 is connected with the N-channel MOS pipe Q2.
In the present embodiment, the soft switch circuit further include: 3rd resistor R3.
The soft switch circuit specifically includes: direct current input is connected to after the first resistor R1 and second switch S2 series connection
Between power supply VCC and common end；One end of the one end the 3rd resistor R3 and the first resistor R1, the second switch S2
The source electrode of one end and the N-channel MOS pipe Q2 are respectively connected with, and the other end is connected with the base stage of the PNP triode Q1；Institute
The other end and direct-current input power supplying VCC of the emitter and the first resistor R1 of stating PNP triode Q1 are respectively connected with；It is described
Second resistance R2 is connected between the collector of the PNP triode Q1 and the grid of the N-channel MOS pipe Q2；Described first
Switch S1 is connected between the grid and common end of the N-channel MOS pipe Q2；The collector of the PNP triode Q1 with it is described
DC output power VDD is connected；The drain electrode of the N-channel MOS pipe Q2 is connected with the common end.
Specifically, the direct-current input power supplying VCC can provide for electronic scale internal cell, it can also be by external dc electricity
Source provides, and the embodiment of the present invention is not particularly limited.The DC output power VDD is electronic scale supply voltage.
Specifically, the first switch S1 includes but is not limited to button switch or key switch, as long as can be realized this hair
The switch of improving eyesight, the embodiment of the present invention are not particularly limited.The second switch S2 include but is not limited to button switch or
Key switch, as long as can be realized the object of the invention switch, the present invention is not particularly limited.
Application principle of the Sofe Switch of the present invention on electronic scale is as follows: pressing the second switch S2, the PNP triode
Q1 conducting, the N-channel MOS pipe Q2 are also switched on, and the DC output power vdd voltage is normal, electronic scale energization booting work；
The first switch S1 is pressed, the PNP triode Q1 is not turned on, and the N-channel MOS pipe Q2 is also not turned on, direct current output electricity
Source vdd voltage drops to 0, electronic scale power-off shutdown.
The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited to this, all to utilize this
Design makes a non-material change to the present invention, and should all belong to behavior that violates the scope of protection of the present invention.
Claims (10)
1. a kind of soft switch circuit applied on electronic scale characterized by comprising first switch, second switch, first are entirely
Control type device, the second wholly-controled device, first resistor and second resistance；It is connected to after the first resistor and second switch series connection
Between direct-current input power supplying and common end；DC output power and public is connected to after the second resistance and first switch series connection
Between end；First wholly-controled device is connected between the direct-current input power supplying and the DC output power；Described
Two wholly-controled devices are connected between the first resistor and the second resistance；First wholly-controled device and described second
Wholly-controled device is connected.
2. the soft switch circuit according to claim 1 applied on electronic scale, which is characterized in that first full-control type
Device is N-channel MOS pipe；Second wholly-controled device is NPN triode.
3. the soft switch circuit according to claim 2 applied on electronic scale, which is characterized in that the soft switch circuit
Further include: 3rd resistor and the 4th resistance；Direct-current input power supplying and public affairs are connected to after the first resistor and second switch series connection
Altogether between end；Described 3rd resistor one end is respectively connected with one end of the first resistor and one end of the second switch,
The other end is respectively connected with the grid of the N-channel MOS pipe and the collector of the NPN triode；The N-channel MOS pipe
Source electrode and the other end and direct-current input power supplying of the first resistor be respectively connected with；The second resistance is connected to the N
Between the drain electrode of channel MOS tube and the base stage of the NPN triode；It is connected after the first switch and the 4th resistor coupled in parallel
Between the base stage and common end of the NPN triode；The drain electrode of the N-channel MOS pipe is connected with the DC output power
It connects；The emitter of the NPN triode is connected with the common end.
4. the soft switch circuit according to claim 1 applied on electronic scale, which is characterized in that first full-control type
Device is the first N-channel MOS pipe；Second wholly-controled device is the second N-channel MOS pipe.
5. the soft switch circuit according to claim 4 applied on electronic scale, which is characterized in that the soft switch circuit
Further include: 3rd resistor；It is connected between direct-current input power supplying and common end after the first resistor and second switch series connection；Institute
One end of one end and the second switch for stating 3rd resistor one end and the first resistor is respectively connected with, the other end with it is described
The source electrode of the grid of first N-channel MOS pipe and the second N-channel MOS pipe is respectively connected with；The first N-channel MOS pipe
Source electrode and the other end and direct-current input power supplying of the first resistor are respectively connected with；The second resistance is connected to described first
Between the drain electrode of N-channel MOS pipe and the grid of the second N-channel MOS pipe；The first switch is connected to described second
Between the grid and common end of N-channel MOS pipe；The drain electrode of the first N-channel MOS pipe is connected with the DC output power
It connects；The drain electrode of the second N-channel MOS pipe is connected with the common end.
6. the soft switch circuit according to claim 1 applied on electronic scale, which is characterized in that first full-control type
Device is PNP triode；Second wholly-controled device is NPN triode.
7. the soft switch circuit according to claim 6 applied on electronic scale, which is characterized in that the soft switch circuit
Further include: 3rd resistor and the 4th resistance；Direct-current input power supplying and public affairs are connected to after the first resistor and second switch series connection
Altogether between end；Tri- pole of one end and the NPN of described 3rd resistor one end and one end of the first resistor, the second switch
The collector of pipe is respectively connected with, and the other end is connected with the base stage of the PNP triode；The emitter of the PNP triode
It is respectively connected with the other end and direct-current input power supplying of the first resistor；The second resistance is connected to tri- pole PNP
Between the collector of pipe and the base stage of the NPN triode；Institute is connected to after the first switch and the 4th resistor coupled in parallel
It states between the base stage of NPN triode and common end；The collector of the PNP triode is connected with the DC output power；
The emitter of the NPN triode is connected with the common end.
8. the soft switch circuit according to claim 1 applied on electronic scale, which is characterized in that first full-control type
Device is PNP triode；Second wholly-controled device is N-channel MOS pipe.
9. the soft switch circuit according to claim 6 applied on electronic scale, which is characterized in that the soft switch circuit
Further include: 3rd resistor；It is connected between direct-current input power supplying and common end after the first resistor and second switch series connection；Institute
State the source electrode point of one end of 3rd resistor one end and the first resistor, one end of the second switch and the N-channel MOS pipe
It is not connected, the other end is connected with the base stage of the PNP triode；The emitter of the PNP triode and first electricity
The other end and direct-current input power supplying of resistance are respectively connected with；The second resistance be connected to the PNP triode collector and
Between the grid of the N-channel MOS pipe；The first switch is connected between the grid and common end of the N-channel MOS pipe；
The collector of the PNP triode is connected with the DC output power；The drain electrode of the N-channel MOS pipe with it is described public
End is connected.
10. the soft switch circuit according to claim 1 applied on electronic scale, which is characterized in that the first switch
Including button switch or key switch；The second switch includes button switch or key switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811020893.0A CN109029676A (en) | 2018-09-03 | 2018-09-03 | A kind of soft switch circuit applied on electronic scale |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811020893.0A CN109029676A (en) | 2018-09-03 | 2018-09-03 | A kind of soft switch circuit applied on electronic scale |
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| CN109029676A true CN109029676A (en) | 2018-12-18 |
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| CN201811020893.0A Withdrawn CN109029676A (en) | 2018-09-03 | 2018-09-03 | A kind of soft switch circuit applied on electronic scale |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813455A (en) * | 2019-04-09 | 2019-05-28 | 杭州万高科技股份有限公司 | A kind of CMOS temperature transmitter |
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| CN203537358U (en) * | 2013-10-31 | 2014-04-09 | 河南东陆高科实业有限公司 | One-key switching circuit |
| CN204361899U (en) * | 2015-02-10 | 2015-05-27 | 西安科技大学 | A kind of Sofe Switch quasi-resonance circuit |
| CN205195682U (en) * | 2015-12-16 | 2016-04-27 | 上海沪工焊接集团股份有限公司 | Switch control circuit and electric welding |
| CN105591640A (en) * | 2016-03-03 | 2016-05-18 | 长沙威胜信息技术有限公司 | Electronic switching circuit and measuring instrument made by using circuit |
| CN208721230U (en) * | 2018-09-03 | 2019-04-09 | 厦门佰伦斯电子科技有限公司 | A kind of soft switch circuit applied on electronic scale |
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| CN203537358U (en) * | 2013-10-31 | 2014-04-09 | 河南东陆高科实业有限公司 | One-key switching circuit |
| CN204361899U (en) * | 2015-02-10 | 2015-05-27 | 西安科技大学 | A kind of Sofe Switch quasi-resonance circuit |
| CN205195682U (en) * | 2015-12-16 | 2016-04-27 | 上海沪工焊接集团股份有限公司 | Switch control circuit and electric welding |
| CN105591640A (en) * | 2016-03-03 | 2016-05-18 | 长沙威胜信息技术有限公司 | Electronic switching circuit and measuring instrument made by using circuit |
| CN208721230U (en) * | 2018-09-03 | 2019-04-09 | 厦门佰伦斯电子科技有限公司 | A kind of soft switch circuit applied on electronic scale |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109813455A (en) * | 2019-04-09 | 2019-05-28 | 杭州万高科技股份有限公司 | A kind of CMOS temperature transmitter |
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Application publication date: 20181218 |