CN206585543U - Level conversion circuit and electrical equipment - Google Patents
Level conversion circuit and electrical equipment Download PDFInfo
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- CN206585543U CN206585543U CN201720239755.6U CN201720239755U CN206585543U CN 206585543 U CN206585543 U CN 206585543U CN 201720239755 U CN201720239755 U CN 201720239755U CN 206585543 U CN206585543 U CN 206585543U
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- power supply
- shifting circuit
- level shifting
- default power
- triode
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- 238000006243 chemical reaction Methods 0.000 title abstract description 16
- 230000005611 electricity Effects 0.000 claims description 10
- 238000010411 cooking Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model provides a level conversion circuit and electrical equipment. Wherein, level shift circuit includes: the power supply comprises a first preset power supply, a second preset power supply, a triode, a first resistor and a second resistor; the voltage of the first preset power supply is greater than that of the second preset power supply; the first preset power supply is connected with one end of a first resistor, and the other end of the first resistor is connected with a collector of the triode; the second preset power supply is connected with one end of a second resistor, and the other end of the second resistor is connected with the base electrode of the triode; the emitter of the triode is used as the input end of the level switching circuit, and the collector of the triode is used as the output end of the level switching circuit. The utility model provides a level shift circuit can reduce circuit cost, and then has reduced the electrical equipment's of using this level shift circuit cost.
Description
Technical field
The utility model is related to technical field of electric appliances, more particularly to a kind of level shifting circuit and electric equipment.
Background technology
The supply voltage of the inside chip of small household electrical appliance is usually 5V.But, with chip technology, the innovation of technique and
The demand of low-power chip, new chip power supply voltage is more and more lower.For example, 3.3V, 2.5V etc. different voltage.So, when
During the chip for using supply voltage different inside electric equipment simultaneously, needed mutually between the chip of two kinds of different power voltages
When transmitting signal, it is necessary to pass through voltage conversion.Otherwise wafer damage will be caused.
At present, the voltage conversion of low and high level signal is realized usually using special electrical level transferring chip.But, level
Conversion chip it is expensive, cause the cost of electric equipment higher.
Utility model content
In order to solve at least one problem mentioned in background technology, the utility model provide a kind of level shifting circuit and
Electric equipment, the circuit realiration that is made up of the low component of the cost conversion of low and high level, reduces circuit cost so that
Cost using the electric equipment of the level shifting circuit is relatively low.
In a first aspect, the utility model provides a kind of level shifting circuit, including：First default power supply, the second default electricity
Source, triode, first resistor and second resistance；The voltage of described first default power supply is more than the electricity of the described second default power supply
Pressure；Described first default power supply is connected with one end of the first resistor, the other end of the first resistor and the triode
Colelctor electrode connection；Described second default power supply is connected with one end of the second resistance, the other end of the second resistance and
The base stage connection of the triode；The emitter stage of the triode is used as the input of the level shifting circuit, three pole
The colelctor electrode of pipe as the level shifting circuit output end；The input input and described second of the level shifting circuit
Default power supply corresponding high level signal or low level signal, the output end output of the level shifting circuit and described the
One default power supply corresponding high level signal or low level signal.
Conducting and cut-off principle by triode, it is possible to achieve the conversion of low level to high level.It is additionally, since circuit
In only include a triode, two resistance and two default power supplys, including electronic component it is seldom and with low cost.
The cost of level shifting circuit is greatly reduced, and then reduces the cost of the electric equipment using the level shifting circuit.
Level shifting circuit as described above, the voltage of the high level signal corresponding with the described second default power supply
It is equal with the voltage of the described second default power supply.
Level shifting circuit as described above, the first resistor and the second resistance are current-limiting resistance.
Second aspect, the utility model provides a kind of electric equipment, including：First chip, the second chip, and first party
The level shifting circuit that face is provided；The level shifting circuit is connected between first chip and second chip.
By the relatively low level shifting circuit of application cost, the cost of electric equipment is reduced.
The third aspect, the utility model provides a kind of level shifting circuit, including：Default power supply, diode and resistance；Institute
One end that default power supply is stated with the resistance is connected, and the other end of the resistance is connected with the positive pole of the diode；Described two
The negative pole of pole pipe is as the input of the level shifting circuit, and the positive pole of the diode is used as the level shifting circuit
Output end；The input of the level shifting circuit inputs first high level signal or low corresponding with the default power supply
Level signal, output end output the second high level signal or low corresponding with the default power supply of the level shifting circuit
Level signal.
Conducting and cut-off principle by diode, it is possible to achieve high level to low level conversion.It is additionally, since circuit
In only include a diode, a resistance and a default power supply, including electronic component it is seldom and with low cost.
The cost of level shifting circuit is greatly reduced, and then reduces the cost of the electric equipment using the level shifting circuit.
Level shifting circuit as described above, the voltage of first high level signal corresponding with the default power supply
Higher than the difference of the voltage and the blanking voltage of the diode of the default power supply.
Level shifting circuit as described above, the resistance is current-limiting resistance.
Fourth aspect, the utility model provides a kind of electric equipment, including：First chip, the second chip, and the 3rd
The level shifting circuit that aspect is provided；The level shifting circuit is connected between first chip and second chip.
By the relatively low level shifting circuit of application cost, the cost of electric equipment is reduced.
Construction of the present utility model and its other utility model purposes and beneficial effect will be by with reference to accompanying drawings
Description of preferred embodiments and it is more obvious understandable.
Brief description of the drawings
Fig. 1 is the structural representation for the level shifting circuit that the utility model embodiment one is provided；
Fig. 2 is the structural representation for the level shifting circuit that the utility model embodiment two is provided；
Fig. 3 is the structural representation for the electric equipment that the utility model embodiment one is provided.
Description of reference numerals：
10：Level shifting circuit； 11：First default power supply； 12：Second default power supply；
13：Triode； 14：First resistor； 15：Second resistance；
20：Level shifting circuit； 21：Default power supply； 22：Diode；
23：Resistance； 31：First chip； 32：Second chip；
33：Level shifting circuit.
Embodiment
Fig. 1 is the structural representation for the level shifting circuit that the utility model embodiment one is provided.As shown in figure 1, this reality
The level shifting circuit 10 provided with new embodiment, can include：First default power supply 11, second presets power supply 12, three poles
Pipe 13, first resistor 14 and second resistance 15.The voltage of first default power supply 11 is more than the voltage of the second default power supply 12.
First default power supply 11 is connected with one end of first resistor 14, the other end of first resistor 14 and the collection of triode 13
Electrode is connected.Second default power supply 12 is connected with one end of second resistance 15, the other end and the triode 13 of second resistance 15
Base stage is connected.
The emitter stage of triode 13 is as the input of level shifting circuit 10, and the colelctor electrode of triode 13 is used as level to turn
Change the output end of circuit 10.
The input input of level shifting circuit 10 high level signal or low electricity corresponding with the second default power supply 12
Ordinary mail number, the output end output of level shifting circuit 10 high level signal corresponding with the first default power supply 11 or low level
Signal.
The level shifting circuit 10 that the present embodiment is provided, principle is as follows：
When the high level signal that the emitter stage input of triode 13 is corresponding with the second default power supply 12,13 sections of triode
Only.The colelctor electrode output of triode 13 high level signal corresponding with the first default power supply 11.
When the low level signal that the emitter stage input of triode 13 is corresponding with the second default power supply 12, triode 13 is led
It is logical.The colelctor electrode output of triode 13 low level signal corresponding with the first default power supply 11.Wherein, second resistance 15 is used for
Triode 13 is protected, to prevent the base stage of triode 13 excessive and cause triode 13 to damage to the electric current of emitter stage.First electricity
Resistance 14 is used to protect triode 13, causes triode 13 to damage to prevent the electric current of colelctor electrode to emitter stage of triode 13 excessive
It is bad.
Wherein, in order to which the emitter stage met in triode 13 inputs the high level signal corresponding with the second default power supply 12
When triode 13 end, the voltage of the high level signal corresponding with the second default power supply 12 can be higher than the second default power supply 12
Voltage.Or, the voltage of the high level signal corresponding with the second default power supply 12 can with the second voltage for presetting power supply 12
With equal.Or, the voltage of the high level signal corresponding with the second default power supply 12 can be less than and the second default power supply 12
Voltage, and the difference between the voltage of the voltage of the corresponding high level signal of the second default power supply 12 and the second default power supply 12
Threshold voltage of the value less than triode 13.
Wherein, first resistor 14 and second resistance 15 can be current-limiting resistance.
Wherein, triode 13 can be NPN type triode.
It can be seen that, the level shifting circuit that the utility model embodiment is provided, can by conducting and the cut-off principle of triode
To realize low level to the conversion of high level.When the input input of the level shifting circuit height corresponding with the second default power supply
During level signal, the output end output of the level shifting circuit high level signal corresponding with the first default power supply.Level conversion
During the input input of the circuit low level signal corresponding with the second default power supply, the output end output of level shifting circuit and
The corresponding low level signal of first default power supply.
Moreover, the utility model embodiment provide level shifting circuit, only include a triode, two resistance with
And two default power supplys, including electronic component it is seldom and with low cost.Compared to special electrical level transferring chip, drop significantly
Low circuit cost, and then reduce the cost of the electric equipment using the level shifting circuit.It can be widely applied to electromagnetism
The device interiors such as stove, electric cooker, insulating pot, electric pressure cooking saucepan are needed in the electric equipment that high-low voltage is changed.
Wherein, the voltage of the first default power supply 11 can be 5V, 3.3V, 2.5V or 1.8V.Second default power supply 12
Voltage can be 3.3V, 2.5V or 1.8V.As long as the voltage for meeting the first default power supply 11 is more than the second default power supply 12
Voltage.For example：When the voltage of first default power supply 11 is 3.3V, the voltage of the second default power supply 12 can for 2.5V or
1.8V。
It is 3.3V, preset with second as 5V, the second default power supply 12 voltage using the first voltage for presetting power supply 11 below
The voltage of the corresponding high level signal of power supply 12 is 3.3V, the voltage of the low level signal corresponding with the second default power supply 12
Exemplified by 0V, the level shifting circuit that the present embodiment is provided is described in detail.
When the emitter stage of triode 13 inputs 3.3V, the voltage difference between the base stage and emitter stage of triode 13 is
0V, triode 13 ends.The colelctor electrode output 5V of triode 13, realizes low level to the conversion of high level.
When the emitter stage of triode 13 inputs 0V, the voltage difference between the base stage and emitter stage of triode 13 is
3.3V, has exceeded threshold voltage, and triode 13 is turned on.The colelctor electrode output 0V of triode 13.Now, first resistor 14 and second
Resistance 15 is used to protect triode 13, excessive and cause triode 13 to damage by the electric current of triode 13 to prevent.
A kind of level shifting circuit is present embodiments provided, including：First default power supply, the second default power supply, triode,
First resistor and second resistance.The voltage of first default power supply is more than the voltage of the second default power supply.The electricity that the present embodiment is provided
Flat change-over circuit, reduces circuit cost, and then reduce the cost of the electric equipment using the level shifting circuit.
Fig. 2 is the structural representation for the level shifting circuit that the utility model embodiment two is provided.As shown in Fig. 2 this reality
The level shifting circuit 20 of example offer is provided, can be included：Default power supply 21, diode 22 and resistance 23.
Default power supply 21 is connected with one end of resistance 23, and the other end of resistance 23 is connected with the positive pole of diode 22.
The negative pole of diode 22 is as the input of level shifting circuit 20, and the positive pole of diode 22 is used as level conversion electricity
The output end on road 20.
The input of level shifting circuit 20 inputs first high level signal or low electricity corresponding with presetting power supply 21
Ordinary mail number, the output end of level shifting circuit 20 exports second high level signal corresponding with presetting power supply 21 or low level letter
Number.
The level shifting circuit 20 that the present embodiment is provided, principle is as follows：
When the negative pole of diode 22 inputs first high level signal corresponding with presetting power supply 21,22 sections of diode
Only.The positive pole of diode 22 exports second high level signal corresponding with presetting power supply 21.
When the negative pole of diode 22 inputs the low level signal corresponding with presetting power supply 21, diode 22 is turned on.Two
The positive pole of pole pipe 22 exports the low level signal corresponding with presetting power supply 21.Wherein, resistance 23 is used for protection diode 22, with
Prevent the electric current of positive pole to the negative pole of diode 22 excessive and cause diode 22 to damage.
Wherein, in order to meet when the negative pole of diode 22 inputs corresponding with presetting power supply 21 first high level signal
Diode 22 ends, and the voltage of first high level signal corresponding with default power supply 21 is higher than the voltage and two of default power supply 21
The difference of the blanking voltage of pole pipe 22.
Wherein, the voltage of second high level signal corresponding with default power supply 21 can be equal to the electricity of default power supply 21
Pressure.
Wherein, resistance 23 can be current-limiting resistance.
It can be seen that, the level shifting circuit that the present embodiment is provided passes through conducting and the cut-off principle of diode, it is possible to achieve high
Level is to low level conversion.When the input of level shifting circuit inputs first high level signal corresponding with presetting power supply
When, the output end of level shifting circuit exports second high level signal corresponding with presetting power supply.Level shifting circuit it is defeated
When entering the low level signal for holding input corresponding with default power supply, the output end output of level shifting circuit is relative with presetting power supply
The low level signal answered.
Moreover, the utility model embodiment provide level shifting circuit, only include a diode, a resistance with
And a default power supply, including electronic component it is seldom and with low cost.Compared to special electrical level transferring chip, drop significantly
Low circuit cost, and then reduce the cost of the electric equipment using the level shifting circuit.It can be widely applied to electromagnetism
The device interiors such as stove, electric cooker, insulating pot, electric pressure cooking saucepan are needed in the electric equipment that high-low voltage is changed.
Wherein, the voltage for presetting power supply 21 can be 3.3 volts, 2.5 volts or 1.8 volts.
Below using preset the voltage of power supply 21 as 3.3V, the voltage of corresponding with default power supply 21 first high level signal
For 5V, exemplified by the voltage of corresponding with default power supply 21 low level signal is 0V, the level that the present embodiment is provided is described in detail
Change-over circuit.
When the negative pole of diode 22 inputs 5V, the cathode voltage of diode 22 is higher than cathode voltage, and diode 22 ends.
The positive pole output 3.3V of diode 22, realizes high level to low level conversion.
When the negative pole of diode 22 inputs 0V, the voltage difference between the positive pole and negative pole of diode 22 is 3.3V, is surpassed
Blanking voltage is crossed, diode 22 is turned on.The positive pole output 0V of diode 22.Now, resistance 23 is used for protection diode 22, with
Prevent excessive and cause diode 22 to damage by the electric current of diode 22.
A kind of level shifting circuit is present embodiments provided, including：Default power supply, diode and resistance.The present embodiment is carried
The level shifting circuit of confession, reduces circuit cost, and then reduce the cost of the electric equipment using the level shifting circuit.
Fig. 3 is the structural representation for the electric equipment that the utility model embodiment one is provided.As shown in figure 3, the present embodiment
The electric equipment of offer, can include：First chip 31, the second chip 32, and the offer of Fig. 1 or Fig. 2 any embodiments
Level shifting circuit 33.
Level shifting circuit 33 is connected between the first chip 31 and the second chip 32.
Wherein, the first chip 31 is different from the supply voltage of the second chip 32.
By the way that level shifting circuit 33 is connected between the first chip 31 and the second chip 32, supply voltage can be caused
The conversion of low and high level is realized between the first different chips 31 and the second chip 32, so that the chip of different power voltage
It can apply in a circuit.
Wherein, electric equipment can need the electric equipment of level conversion for arbitrary device interior, for example, electromagnetic oven,
Electric cooker, insulating pot, electric pressure cooking saucepan etc..
The electric equipment that the present embodiment is provided, including the level shifting circuit that Fig. 1 or embodiment illustrated in fig. 2 are provided, its
Technical principle is similar with technique effect, and here is omitted.
Finally it should be noted that：Various embodiments above only to the technical scheme for illustrating the utility model embodiment, rather than
It is limited；Although the utility model embodiment is described in detail with reference to foregoing embodiments, this area it is common
Technical staff should be understood：It can still modify to the technical scheme described in foregoing embodiments, or to wherein
Some or all of technical characteristic carries out equivalent substitution；And these modifications or replacement, do not make the essence of appropriate technical solution
Depart from the scope of the utility model embodiment technical scheme.
Claims (8)
1. a kind of level shifting circuit (10), it is characterised in that including：First default power supply (11), the second default power supply (12),
Triode (13), first resistor (14) and second resistance (15)；The voltage of described first default power supply (11) is more than described second
The voltage of default power supply (12)；
Described first default power supply (11) is connected with one end of the first resistor (14), the other end of the first resistor (14)
It is connected with the colelctor electrode of the triode (13)；Described second default power supply (12) and one end of the second resistance (15) connect
Connect, the other end of the second resistance (15) is connected with the base stage of the triode (13)；
The emitter stage of the triode (13) is used as the input of the level shifting circuit (10), the collection of the triode (13)
Electrode as the level shifting circuit (10) output end；
The input input of the level shifting circuit (10) high level signal corresponding with the described second default power supply (12)
Or low level signal, the level shifting circuit (10) output end output with described first preset power supply (11) it is corresponding
High level signal or low level signal.
2. level shifting circuit (10) according to claim 1, it is characterised in that described to preset power supply with described second
(12) voltage of corresponding high level signal is equal with the voltage of the described second default power supply (12).
3. level shifting circuit (10) according to claim 1 or 2, it is characterised in that the first resistor (14) and institute
Second resistance (15) is stated for current-limiting resistance.
4. a kind of electric equipment, it is characterised in that including：First chip (31), the second chip (32), and such as claim 1
To the level shifting circuit (10) described in 3 any one；
The level shifting circuit (10) is connected between first chip (31) and second chip (32).
5. a kind of level shifting circuit (20), it is characterised in that including：Default power supply (21), diode (22) and resistance (23)；
The default power supply (21) is connected with one end of the resistance (23), the other end and the diode of the resistance (23)
(22) positive pole connection；
The negative pole of the diode (22) is used as the input of the level shifting circuit (20), the positive pole of the diode (22)
It is used as the output end of the level shifting circuit (20)；
The input of the level shifting circuit (20) inputs first high level signal corresponding with the default power supply (21)
Or low level signal, the output end output of the level shifting circuit (20) is corresponding with the default power supply (21) second high
Level signal or low level signal.
6. level shifting circuit (20) according to claim 5, it is characterised in that described with default power supply (21) phase
The voltage of corresponding first high level signal is higher than the voltage of the default power supply (21) and the cut-off electricity of the diode (22)
The difference of pressure.
7. the level shifting circuit (20) according to claim 5 or 6, it is characterised in that the resistance (23) is current limliting electricity
Resistance.
8. a kind of electric equipment, it is characterised in that including：First chip (31), the second chip (32), and such as claim 5
To the level shifting circuit (20) described in 7 any one；
The level shifting circuit (20) is connected between first chip (31) and second chip (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720239755.6U CN206585543U (en) | 2017-03-13 | 2017-03-13 | Level conversion circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720239755.6U CN206585543U (en) | 2017-03-13 | 2017-03-13 | Level conversion circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206585543U true CN206585543U (en) | 2017-10-24 |
Family
ID=60113403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720239755.6U Active CN206585543U (en) | 2017-03-13 | 2017-03-13 | Level conversion circuit and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206585543U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175561A (en) * | 2019-12-30 | 2020-05-19 | 漳州科华技术有限责任公司 | Dual-power voltage detection circuit and system |
-
2017
- 2017-03-13 CN CN201720239755.6U patent/CN206585543U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175561A (en) * | 2019-12-30 | 2020-05-19 | 漳州科华技术有限责任公司 | Dual-power voltage detection circuit and system |
| CN111175561B (en) * | 2019-12-30 | 2022-07-05 | 漳州科华电气技术有限公司 | Dual-power voltage detection circuit and system |
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