CN107682005A - A kind of level shifting circuit - Google Patents
A kind of level shifting circuit Download PDFInfo
- Publication number
- CN107682005A CN107682005A CN201711086242.7A CN201711086242A CN107682005A CN 107682005 A CN107682005 A CN 107682005A CN 201711086242 A CN201711086242 A CN 201711086242A CN 107682005 A CN107682005 A CN 107682005A
- Authority
- CN
- China
- Prior art keywords
- circuit
- switch pipe
- connects
- tie point
- level shifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/0185—Coupling arrangements; Interface arrangements using field effect transistors only
- H03K19/018507—Interface arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0008—Arrangements for reducing power consumption
- H03K19/0013—Arrangements for reducing power consumption in field effect transistor circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0008—Arrangements for reducing power consumption
- H03K19/0016—Arrangements for reducing power consumption by using a control or a clock signal, e.g. in order to apply power supply
Abstract
The embodiment of the present application discloses a kind of level shifting circuit, including：Tie point, the second branch road, on-off circuit and first switch pipe；The input of tie point is the first control terminal and the second control terminal of the input of level shifting circuit, the first output end and the second output difference connecting valve circuit；The first end of on-off circuit connects the first accessory power supply, and the second end connects the first end of the second branch road, the second end ground connection；Second end of the control terminal connecting valve circuit of first switch pipe, first end connect the second accessory power supply, and the second end is the output end of level shifting circuit.In discharge process, on-off circuit discharges through tie point, on-off circuit quickly disconnects, the control terminal of first switch pipe is discharged through the second branch road, shorten the time needed for the shut-off of first switch pipe, allow the output of level shifting circuit to be quickly changed into low level from high level, reduce the power consumption of level shifting circuit, reduce system power consumption.
Description
Technical field
The application is related to electric and electronic technical field, more particularly to a kind of level shifting circuit.
Background technology
In design of electronic circuits, usually there is the problem of logic that inputs and export is uncoordinated in internal system, so as to carry
The high complexity of system design.For example, when 1.8V digital circuit is communicated with being operated in 3.3V analog circuit, need
To solve the transfer problem of two kinds of level first, at this moment just need level shifting circuit so that two circuit proper communications.
Fig. 1 shows a kind of existing level shifting circuit.In the discharge process from high level to low transition, the
Three switching tube K3 discharge through route shown by arrows in Fig. 1, and the voltage at node g_hv is reduced to switching tube K1 shut-offs, level
Change-over circuit exports low level.In above-mentioned discharge process, switching tube K3 shut-off is time-consuming longer, and power supply hv_sup continues to section
Charged at point g_hv, guiding discharge process power consumption is larger, increases the power consumption of system.
The content of the invention
In order to solve prior art problem, this application provides a kind of level shifting circuit, to reduce level shifting circuit
Power consumption, lower system power consumption.
A kind of level shifting circuit that the embodiment of the present application provides, including：Tie point, the second branch road, on-off circuit and
First switch pipe；
The input of the tie point is the input of the level shifting circuit, and the first of the tie point exports
End connects the first control terminal of the on-off circuit, and the second output end of the tie point connects the second of the on-off circuit
Control terminal；
The first end of the on-off circuit connects the first accessory power supply, the second end connection described second of the on-off circuit
The first end of branch road, the second end ground connection of second branch road；
The control terminal of the first switch pipe connects the second end of the on-off circuit, the first end of the first switch pipe
The second accessory power supply is connected, the second end of the first switch pipe is the output end of the level shifting circuit.
Optionally, the circuit also includes：Electric discharge isolation branch road；
The first end of the electric discharge isolation branch road connects the first output end of the tie point, the electric discharge isolation branch road
The second end connect the first end of second branch road.
Optionally, the tie point, including：First phase inverter and the second phase inverter；
The input of first phase inverter is the input of the tie point, and the output end of first phase inverter connects
Connect the first control terminal of the on-off circuit；
The input of second phase inverter connects the output end of first phase inverter, the output of second phase inverter
End connects the second control terminal of the on-off circuit.
Optionally, the on-off circuit, including：Second switch pipe and the 3rd switching tube；
The control terminal of the second switch pipe connects the first output end of the tie point, and the of the second switch pipe
One end connects first accessory power supply, and the second end of the second switch pipe connects the first end of the 3rd switching tube；
Second end of the 3rd switching tube connects the first end of second branch road, the control terminal of the 3rd switching tube
Connect the second output end of the tie point.
Optionally, second branch road, including：4th switching tube；
The first end of 4th switching tube connects the second end of the on-off circuit, the second end of the 4th switching tube
Ground connection, the control terminal of the 4th switching tube connect the second output end of the tie point.
Optionally,
The electric discharge isolation circuit, including at least one isolation resistance；
Or the electric discharge isolation circuit, include the isolation resistances of at least two serial or parallel connections；
Or the electric discharge isolation circuit, include the isolation resistance that at least three connection in series-parallel connect.
Another level shifting circuit that the embodiment of the present application provides, including：Tie point, the second branch road, on-off circuit,
Isolation circuit of discharging and first switch pipe；
The first end of the on-off circuit connects the first accessory power supply, the second end connection described first of the on-off circuit
First output end of branch road, the first control terminal of the on-off circuit connect the first end of second branch road, the switch electricity
Second control terminal on road connects the second output end of the tie point；
The input of the tie point is the input of the level shifting circuit, and the second of second branch road terminates
Ground；
The first end of the electric discharge isolation circuit connects the first output end of the tie point, the electric discharge isolation circuit
The second end connect the first end of second branch road；
The control terminal of the first switch pipe connects the second end of the on-off circuit, the first end of the first switch pipe
The second accessory power supply is connected, the second end of the first switch pipe is the output end of the level shifting circuit.
Optionally, the tie point, including：First phase inverter and the second phase inverter；
The input of first phase inverter be the level shifting circuit input, the output of first phase inverter
End connects the second control terminal of the on-off circuit；
The input of second phase inverter connects the output end of first phase inverter, the output of second phase inverter
End connects the second end of the on-off circuit.
Optionally, the on-off circuit, including：Second switch pipe and the 3rd switching tube；
The control terminal of the second switch pipe connects the first end of second branch road, the first end of the second switch pipe
First accessory power supply is connected, the second end of the second switch pipe connects the first end of the 3rd switching tube；
Second end of the 3rd switching tube connects the first output end of the tie point, the control of the 3rd switching tube
End processed connects the second output end of the tie point.
Optionally, second branch road, including：4th switching tube；
The first end of 4th switching tube connects the first control terminal of the on-off circuit, and the of the 4th switching tube
Two ends are grounded, and the control terminal of the 4th switching tube connects the second output end of the tie point.
Optionally,
The electric discharge isolation circuit, including at least one isolation resistance；
Or the electric discharge isolation circuit, include the isolation resistances of at least two serial or parallel connections；
Or the electric discharge isolation circuit, include the isolation resistance that at least three connection in series-parallel connect.
Compared with prior art, the embodiment of the present application at least has advantages below：
In the embodiment of the present application, the high level or low level inputted according to the input of tie point, through on-off circuit,
First switch pipe is controlled to turn on so that level shifting circuit exports high level, or control first switch according to the second accessory power supply
Pipe is turned off so that level translation circuit output low level.Changed in input by high level to during low level, on-off circuit
Discharged through tie point, the connection of the control terminal of the first accessory power supply and first switch pipe can be disconnected faster, shorten the
Path between one accessory power supply and first switch pipe control terminal disconnect needed for time, through the at the control terminal of first switch pipe
Two branch roads discharge, and the time needed for the shut-off of first switch pipe are shortened, so that the output of level shifting circuit can be quick
The power consumption for being changed into low level from high level, reducing level shifting circuit, reduce system power consumption.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of existing circuit topology of level shifting circuit；
Fig. 2 is a kind of structural representation for level shifting circuit that the embodiment of the present application provides；
Fig. 3 is the structural representation for another level shifting circuit that the embodiment of the present application provides；
Fig. 4 is the circuit topology figure of existing another level shifting circuit；
Fig. 5 is a kind of circuit topology figure for level shifting circuit that the application specific embodiment provides；
Fig. 6 is the structural representation for another level shifting circuit that the embodiment of the present application provides；
Fig. 7 is the circuit topology figure for another level shifting circuit that the application specific embodiment provides.
Embodiment
In order that those skilled in the art more fully understand application scheme, below in conjunction with the embodiment of the present application
Accompanying drawing, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only this
Apply for part of the embodiment, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art exist
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of the application protection.
A kind of circuit topology of existing level shifting circuit is as shown in Figure 1.
The input IN of level shifting circuit connects section with protection circuit through the first phase inverter Inv1, the second phase inverter Inv2
Point g_hv；
Second switch pipe K2 first end connects the first accessory power supply hv_sup, second switch pipe K2 the second end connection the
Three switching tube K3 first end, second switch pipe K2 control terminal connecting node g_hv；
3rd switching tube K3 the second end connecting node g_hv, the 3rd switching tube K3 control terminal connect the first phase inverter
Inv1 output end；
First switch pipe K1 first end connects the second accessory power supply in_hv, and first switch pipe K1 the second end is level
The output end out_hv of change-over circuit, first switch pipe K1 control terminal connecting node g_hv.
The operation principle of level shifting circuit shown in Fig. 1 is as follows：
When the input IN of level shifting circuit is high level, the 3rd switching tube K3 control terminal is low level, the 3rd
Switching tube K3 is turned on, and the first accessory power supply hv_sup turns on the path between node g_hv, and the first accessory power supply hv_sup is
Charged at node g_hv, first switch pipe K1 control terminal be high level, and first switch pipe K1 is turned on, level shifting circuit it is defeated
The high level for going out to hold out_hv output voltages to be equal to the second accessory power supply in_hv.
It is anti-to second through the 3rd switching tube K3 at node g_hv when the input IN of level shifting circuit is changed into low level
Path electric discharge where phase device Inv2, pulling down node g_hv locate voltage until first switch pipe K1 shut-offs, level shifting circuit it is defeated
Go out to hold out_hv to export low level.In above-mentioned discharge process, due to second switch pipe K2 control terminal connecting nodes g_hv, first
Accessory power supply hv_sup continues to charge to node g_hv, causes the time needed for second switch pipe K2 shut-offs longer, causes to discharge
During unnecessary power consumption, level shifting circuit switchs to export from high level low level takes longer, level conversion
Circuit it is less efficient, influence system effectiveness.
Therefore, the embodiment of the present application provides a kind of level shifting circuit, put using tie point and the second branch road two
Electric branch road is respectively second switch pipe K2 and node g_hv electric discharges, can disconnect second switch pipe K2 faster, so as to disconnect the
Path between one accessory power supply hv_sup and first switch pipe K1 control terminal, shorten needed for first switch pipe K1 shut-offs
Time, so as to reduce the power consumption of anti-discharge process, accelerate level shifting circuit and switch to export low level from high level
Speed, reduce system energy consumption.
Based on above-mentioned thought, to enable the above-mentioned purpose of the application, feature and advantage more obvious understandable, with reference to
Accompanying drawing is described in detail to the embodiment of the application.
Embodiment one：
Referring to Fig. 2, the figure is a kind of structural representation for level shifting circuit that the embodiment of the present application provides.
The level shifting circuit that the embodiment of the present application provides, including：Tie point 100, the second branch road 200, on-off circuit
300 and first switch pipe K1；
The input of tie point 100 is the input IN of level shifting circuit, and the first output end of tie point 100 connects
Connect the first control terminal of on-off circuit 300, the second control terminal of the second output end connecting valve circuit 300 of tie point 100；
The first end of on-off circuit 300 connects the first accessory power supply hv_sup, the second end connection second of on-off circuit 300
The first end of branch road 200, the second end ground connection of the second branch road 200；
Second end of first switch pipe K1 control terminal connecting valve circuit 300, first switch pipe K1 first end connection
Second accessory power supply in_hv, first switch pipe K1 the second end are the output end out_hv of level shifting circuit.
In the embodiment of the present application, when 100 input high level of tie point, the first output end of tie point 100 and
Two output end controlling switch circuits 300 turn on, so that the control terminal that the first accessory power supply hv_sup is first switch pipe K1 charges,
Increase the voltage of first switch pipe K1 control terminal, so as to control first switch pipe K1 conducting, make the level shifting circuit defeated
Go out high level corresponding with the second accessory power supply in_hv；When the input of tie point 100 switchs to low level, Switching Power Supply 300 passes through
Tie point 100 is discharged, and disconnects the connection of the first accessory power supply hv_sup and first switch pipe K1 control terminal, first switch pipe
K1 control terminal voltage is discharged through the second branch road 200, and the control terminal for being first switch pipe K1 is discharged so that first switch pipe K1 energy
Enough to turn off within a short period of time, the output of the level shifting circuit is converted to low level by high level.
Specifically, during the input IN input high levels of level shifting circuit, the controlling switch circuit 300 of tie point 100
Conducting, the control terminal that the first accessory power supply hv_sup is first switch pipe K1 charge, the voltage of first switch pipe K1 control terminal
Rise, first switch pipe K1 conductings, the output end out_hv outputs of level shifting circuit are corresponding with the second accessory power supply in_hv
High level.It is understood that when it is implemented, can be corresponding by being carried out to the second accessory power supply in_hv magnitude of voltage
Set so that level shifting circuit exports the high level of corresponding voltage, realizes the conversion of level.For example, work as level shifting circuit
Input IN and output end out_hv connect the first circuit and second circuit respectively, the first circuit is operated in high level output
1.8V voltages, and 3.3V voltages need to be inputted when second circuit is operated in high level, now can be by the second accessory power supply in_hv's
Voltage is arranged to 3.3V so that during the input IN inputs 1.8V of level shifting circuit high level, 3.3V high level is exported,
Realize the communication between the first circuit and second circuit.
When the input IN input low levels of level shifting circuit, on-off circuit 300 discharges through tie point 100, cuts
Disconnected first accessory power supply hv_sup and the connection of first switch pipe K1 control terminals, first switch pipe K1 control terminal is through the second branch road
200 electric discharge so that the voltage rapid decrease of first switch pipe K1 control terminals, shorten first switch pipe K1 shut-off needed for when
Between, so as to reduce the time that the first accessory power supply persistently charges to on-off circuit 300, the electric power for reducing discharge process disappears
Consumption.When first switch pipe K1 control terminal voltage drops to blanking voltage, first switch pipe K1 shut-offs, level shifting circuit
Output end out_hv outputs switch to low level.
In the embodiment of the present application, the high level or low level inputted according to the input of tie point, through on-off circuit,
First switch pipe is controlled to turn on so that level shifting circuit exports high level, or control first switch according to the second accessory power supply
Pipe is turned off so that level translation circuit output low level.Changed in input by high level to during low level, on-off circuit
Discharged through tie point, the connection of the control terminal of the first accessory power supply and first switch pipe can be disconnected faster, shorten the
Path between one accessory power supply and first switch pipe control terminal disconnect needed for time, through the at the control terminal of first switch pipe
Two branch roads discharge, and the time needed for the shut-off of first switch pipe are shortened, so that the output of level shifting circuit can be quick
The power consumption for being changed into low level from high level, reducing level shifting circuit, reduce system power consumption.
Embodiment two：
Referring to Fig. 3, the figure is the structural representation for another level shifting circuit that the embodiment of the present application provides.Compared to
Fig. 2, this figure provides a kind of more specifical level shifting circuit.
In the embodiment of the present application, level shifting circuit can also include：Electric discharge isolation circuit 400；
First output end of the first end connection tie point 100 for isolation circuit 400 of discharging, electric discharge isolation circuit 400
Second end connects the first end of the second branch road 200.
When the input IN inputs of level shifting circuit switch to low level, electric discharge isolation circuit 400 can be with disconnecting switch
Circuit 300 and first switch pipe K1 control terminal can discharge through the branch road 200 of tie point 100 and second respectively；Turn in level
, can be along the first of the first output end-on-off circuit 300 of tie point 100 when changing the input IN input high levels of circuit
Control terminal and electric discharge isolation circuit 400 accelerate the conducting speed of on-off circuit 300, so as to shorten needed for first switch pipe K1 conductings
Time, shorten the time-consuming of level shifting circuit output high level.
As an example, electric discharge isolation circuit 400 can be resistor network, can specifically include at least one isolation electricity
Resistance；Or include the isolation resistance of at least two serial or parallel connections；Or include the isolation electricity of at least three connection in series-parallel connection
Resistance.Those skilled in the art can also set electric discharge isolation circuit others specific implementation, here not according to actual conditions
Enumerate again.
Fig. 4 shows existing another level shifting circuit.
First phase inverter Inv input be level shifting circuit output end IN, the first phase inverter Inv1 output end
Connect the second phase inverter Inv2 input；
Control terminal of the second phase inverter Inv2 output end through node g_hv connection first switch pipes K1；
Second switch pipe K2 first end through first resistor R1 connection the first accessory power supply hv_sup, second switch pipe K2's
First end of second end through the switching tube K3 of second resistance R2 connections the 3rd, second switch pipe K2 control terminal connecting node g_hv；
3rd switching tube K3 the second end connects through 3rd resistor R3 connecting node g_hv, the 3rd switching tube K3 control terminal
First phase inverter Inv1 output end；
First switch pipe K1 first end connects the second accessory power supply in_hv, and first switch pipe K1 the second end is level
The output end out_hv of change-over circuit.
When the input IN of level shifting circuit is changed into low level from high level, although first resistor R1, second resistance
R2 and 3rd resistor R3 can reduce node g_hv discharge current, so as to reduce the power consumption of discharge process.But
The input IN of level translation circuit is changed into high level from low level, and the first accessory power supply hv_sup is along first resistor R1- second
The switching tube K3- 3rd resistors (path as shown in solid arrow in Fig. 5) of switching tube K2- second resistances R2- the 3rd are node g_hv
During place's charging, first resistor R1, second resistance R2 and 3rd resistor R3 have slowed down the elevated speed of voltage at node g_hv, influence
The efficiency of level shifting circuit.
And in the embodiment of the present application, when the input IN input high levels of level shifting circuit, the first accessory power supply
The first control terminal and electric discharge isolation circuit 400 of first output end-on-off circuits 300 of the hv_sup along tie point 100 are accelerated
The conducting speed of on-off circuit 300, so as to shorten the time needed for first switch pipe K1 conductings, it is defeated to shorten level shifting circuit
Go out the time-consuming of high level, improve the efficiency of level translation circuit.
Embodiment three：
Referring to Fig. 5, the figure is a kind of circuit topology figure for level shifting circuit that the application specific embodiment provides.Compare
In Fig. 2 and Fig. 3, this figure provides a kind of more specifical level shifting circuit.
Fig. 5 only includes an isolation resistance R to be illustrated the offer of the application specific embodiment using isolation circuit of discharging
The circuit topology of level shifting circuit, isolation resistance R both ends connect the first output end and the second branch road of tie point respectively
The second end, other implementations for isolation circuit of discharging will not enumerate here.
In the embodiment of the present application, tie point, it can specifically include：First phase inverter Inv1 and the second phase inverter Inv2；
First phase inverter Inv1 input is the input of tie point, and the first phase inverter Inv1 output end connection is opened
First control terminal on powered-down road；
Second phase inverter Inv2 input connects the first phase inverter Inv1 output end, the second phase inverter Inv2 output
Hold the second control terminal of connecting valve circuit.
In some possible implementations, tie point can also include protection circuit, to prevent the abnormal feelings such as excessively stream
Condition causes the damage of device, and those skilled in the art can be configured according to actual conditions to protection circuit, not another here
One is repeated, and the protection circuit is also not shown in FIG. 5.
Optionally, on-off circuit, can specifically include：Second switch pipe K2 and the 3rd switching tube K3；
First output end of second switch pipe K2 control terminal connection tie point, second switch pipe K2 first end connection
First accessory power supply hv_sup, second switch pipe K2 the second end connect the 3rd switching tube K3 first end；
3rd switching tube K3 the second end connects the first end (i.e. node g_hv in Fig. 5) of the second branch road, the 3rd switch
Second output end of pipe K3 control terminal connection tie point.
Second branch road, it can specifically include：4th switching tube K4；
Second end of the 4th switching tube K4 first end connecting valve circuit, the 4th switching tube K4 the second end ground connection, the
Second output end of four switching tube K4 control terminal connection tie point.
Similarly, the second branch road can also include protection circuit, should to prevent the abnormal conditions such as excessively stream from causing the damage of device
Protection circuit is also not shown in FIG. 5.
When the input IN input high levels of level shifting circuit, the first phase inverter Inv1 output low levels, second is anti-
Phase device Inv2 exports high level, and second switch pipe K2 and the 3rd switching tube K3 are both turned on, the 4th switching tube K4 shut-offs, the first auxiliary
Power supply hv_sup charges through the switching tube K3 of second switch pipe K2- the 3rd for node g_hv, and is second switch pipe through isolation resistance R
K2 control terminal charging (path as indicated by dotted line in Fig. 5), accelerate the ramp-up rate of second switch pipe K2 control terminal voltage,
Increase the charging current that the first accessory power supply hv_sup charges to node g_hv, quickly draw high the electricity of first switch pipe K1 control terminals
Pressure, after first switch pipe K1 conductings, the output end out_hv outputs of level shifting circuit are corresponding with the second accessory power supply in_hv
Time needed for high level, shortening first switch pipe K1 conductings and level shifting circuit output high level.
When the input IN of level shifting circuit switchs to input low level, the first phase inverter Inv1 output high level, the
Two switching tube K2 discharge along tie point through the second phase inverter Inv2 (such as path indicated by the solid arrow of Fig. 5 tops) quickly to close
Disconnected, the 3rd switching tube K3 shut-offs, the 4th switching tube K4 is turned on, and is put at node g_hv along the second branch road through the 4th switching tube K4 to ground
Electric (such as the path indicated by Fig. 5 lower solid line arrows), the switches of the first accessory power supply hv_sup and the 3rd can be disconnected faster
Path between pipe K3 control terminal, the time needed for first switch pipe K1 shut-offs is shortened, so as to reduce anti-discharge process
Power consumption, reduce system energy consumption.
Example IV：
Referring to Fig. 6, the figure is the structural representation for another level shifting circuit that the embodiment of the present application provides.
The level shifting circuit that the embodiment of the present application provides, including：Tie point 100, the second branch road 200, on-off circuit
300th, discharge isolation circuit 400 and first switch pipe K1；
The first end of on-off circuit 300 connects the first accessory power supply hv_sup, the second end connection first of on-off circuit 300
First output end of branch road 100, the first control terminal of on-off circuit 300 connect the first end of the second branch road 200, on-off circuit
Second output end of 300 the second control terminal connection tie point 100；
The input of tie point 100 is the input IN of level shifting circuit, and the second end of the second branch road 200 is grounded；
First output end of the first end connection tie point 100 for isolation circuit 400 of discharging, electric discharge isolation circuit 400
Second end connects the first end of the second branch road 200；
As an example, electric discharge isolation circuit 400 can be resistor network, can specifically include at least one isolation electricity
Resistance；Or include the isolation resistance of at least two serial or parallel connections；Or include the isolation electricity of at least three connection in series-parallel connection
Resistance.
Second end of first switch pipe K1 control terminal connecting valve circuit 300, first switch pipe K1 first end connection
Second accessory power supply in_hv, the second end of first switch pipe are the output end out_hv of level shifting circuit.
In the embodiment of the present application, when the input IN input high levels of level shifting circuit, through tie point 100
One output end and the second output end and the electric discharge controlling switch circuit 300 of isolation circuit 400 turn on, so that the first accessory power supply
The control terminal that hv_sup is first switch pipe K1 charges, and increases the voltage of first switch pipe K1 control terminals, so as to control first to open
Pipe K1 conducting is closed, the level shifting circuit is exported high level corresponding with the second accessory power supply in_hv；Work as tie point
When 100 inputs switch to low level, electric discharge isolation circuit 400 causes on-off circuit 300 discharges through tie point 100 to turn off, cut-out
The connection of first accessory power supply hv_sup and first switch pipe K1 control terminal, and be first switch pipe K1 through the second branch road 200
Control terminal electric discharge so that first switch pipe K1 can be turned off within a short period of time, and the output of the level shifting circuit is by high electricity
Flat turn is changed to low level.
Specifically, during the input IN input high levels of level shifting circuit, the controlling switch circuit 300 of tie point 100
Conducting, the control terminal that the first accessory power supply hv_sup is first switch pipe K1 charge, the voltage of first switch pipe K1 control terminal
Rise, first switch pipe K1 conductings, the output end out_hv outputs of level shifting circuit are corresponding with the second accessory power supply in_hv
High level.It is understood that when it is implemented, can be corresponding by being carried out to the second accessory power supply in_hv magnitude of voltage
Set so that level shifting circuit exports the high level of corresponding voltage, realizes the conversion of level.For example, work as level shifting circuit
Input IN and output end out_hv connect the first circuit and second circuit respectively, the first circuit is operated in high level output
1.8V voltages, and 3.3V voltages need to be inputted when second circuit is operated in high level, now can be by the second accessory power supply in_hv's
Voltage is arranged to 3.3V so that during the input IN inputs 1.8V of level shifting circuit high level, 3.3V high level is exported,
Realize the communication between the first circuit and second circuit.
When the input IN input low levels of level shifting circuit, electric discharge isolation circuit 400 causes on-off circuit 300 to pass through
The electric discharge shut-off of tie point 100, fast shut-off the first accessory power supply hv_sup and the connection of first switch pipe K1 control terminals, first
Switching tube K1 control terminal is discharged through the second branch road 200 so that the voltage rapid decrease of first switch pipe K1 control terminals, is shortened
Time needed for first switch pipe K1 shut-offs, so as to reduce the time that the first accessory power supply persistently charges to on-off circuit 300,
Reduce the power consumption of discharge process.When first switch pipe K1 control terminal voltage drops to blanking voltage, first switch
Pipe K1 is turned off, and the output end out_hv outputs of level shifting circuit switch to low level.
In the embodiment of the present application, the high level or low level inputted according to the input of tie point, through on-off circuit,
First switch pipe is controlled to turn on so that level shifting circuit exports high level, or control first switch according to the second accessory power supply
Pipe is turned off so that level translation circuit output low level.Changed in input by high level to during low level, on-off circuit
Discharged through tie point, the connection of the control terminal of the first accessory power supply and first switch pipe can be disconnected faster, shorten the
Path between one accessory power supply and first switch pipe control terminal disconnect needed for time, through the at the control terminal of first switch pipe
Two branch roads discharge, and the time needed for the shut-off of first switch pipe are shortened, so that the output of level shifting circuit can be quick
The power consumption for being changed into low level from high level, reducing level shifting circuit, reduce system power consumption.
Embodiment five：
Referring to Fig. 7, the figure is the circuit topology figure for another level shifting circuit that the application specific embodiment provides.Phase
Compared with Fig. 6, this figure provides a kind of more specifical level shifting circuit.
Fig. 7 only includes level of the isolation resistance R to be illustrated the embodiment of the present application offer using isolation circuit of discharging
The physical circuit topology of change-over circuit, isolation resistance R both ends connect the first output end and the second branch road of tie point respectively
First end, other implementations for isolation circuit of discharging will not enumerate here.
In the embodiment of the present application, tie point, can specifically include：First phase inverter Inv1 and the second phase inverter
Inv2；
First phase inverter Inv1 input is the input of level shifting circuit, and the first phase inverter Inv1 output end connects
Connect the second control terminal of on-off circuit；
Second phase inverter Inv2 input connects the first phase inverter Inv1 output end, the second phase inverter Inv2 output
Hold the second end of connecting valve circuit.
In some possible implementations, tie point can also include protection circuit, to prevent the abnormal feelings such as excessively stream
Condition causes the damage of device, and those skilled in the art can be configured according to actual conditions to protection circuit, not another here
One is repeated, and the protection circuit is also not shown in FIG. 7.
Optionally, on-off circuit, can specifically include：Second switch pipe K2 and the 3rd switching tube K3；
Second switch pipe K2 control terminal connects the first end of the second branch road, second switch pipe K2 first end connection first
Accessory power supply hv_sup, second switch pipe K2 the second end connect the 3rd switching tube K3 first end；
First output end of the 3rd switching tube K3 the second end connection tie point, the 3rd switching tube K3 control terminal connection
Second output end of tie point.
Second branch road, it can specifically include：4th switching tube K4；
First control terminal of the 4th switching tube K4 first end connecting valve circuit, the 4th switching tube K4 the second termination
Ground, the second output end of the 4th switching tube K4 control terminal connection tie point.
Similarly, the second branch road can also include protection circuit, should to prevent the abnormal conditions such as excessively stream from causing the damage of device
Protection circuit is also not shown in FIG. 7.
When the input IN input high levels of level shifting circuit, the first phase inverter Inv1 output low levels, second is anti-
Phase device Inv2 exports high level, and second switch pipe K2 and the 3rd switching tube K3 are both turned on, the 4th switching tube K4 shut-offs, the first auxiliary
Power supply hv_sup is that node g_hv charges in (path as indicated by dotted line in Fig. 7) through the switching tube K3 of second switch pipe K2- the 3rd, is drawn
The voltage of high first switch pipe K1 control terminals, after first switch pipe K1 conductings, the output end out_hv outputs of level shifting circuit
High level corresponding with the second accessory power supply in_hv.
When the input IN of level shifting circuit switchs to input low level, the first phase inverter Inv1 output high level, the
Three switching tube K3 are turned off, and the 4th switching tube K4 conductings, second switch pipe K2 is along the second branch road through the 4th switching tube K4 (such as on Fig. 5
Path indicated by portion's solid arrow) rapidly switched off to ground electric discharge, along tie point through the second phase inverter Inv2 at node g_hv
Electric discharge can disconnect the first accessory power supply hv_sup and the 3rd faster and open (such as the path indicated by Fig. 7 lower solid line arrows)
The path between pipe K3 control terminal is closed, the time needed for first switch pipe K1 shut-offs is shortened, so as to reduce counter discharged
The power consumption of journey, reduces system energy consumption.
It should be noted that each embodiment is described by the way of progressive in this specification, each embodiment emphasis is said
Bright is all the difference with other embodiment, between each embodiment identical similar portion mutually referring to.
It should also be noted that, herein, such as first and second or the like relational terms are used merely to one
Entity or operation make a distinction with another entity or operation, and not necessarily require or imply between these entities or operation
Any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant are intended to contain
Lid nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element also be present in process, method, article or equipment including the key element.
It is described above, only it is the preferred embodiment of the application, not makees any formal limitation to the application.Though
Right the application is disclosed above with preferred embodiment, but is not limited to the application.It is any to be familiar with those skilled in the art
Member, in the case where not departing from technical scheme ambit, all using the methods and technical content of the disclosure above to the application
Technical scheme makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every without departing from
The content of technical scheme, the technical spirit according to the application is to any simple modification made for any of the above embodiments, equivalent
Change and modification, still fall within technical scheme protection in the range of.
Claims (11)
- A kind of 1. level shifting circuit, it is characterised in that including：Tie point, the second branch road, on-off circuit and first switch Pipe；The input of the tie point is the input of the level shifting circuit, and the first output end of the tie point connects The first control terminal of the on-off circuit is connect, the second output end of the tie point connects the second control of the on-off circuit End；The first end of the on-off circuit connects the first accessory power supply, and the second end of the on-off circuit connects second branch road First end, second branch road the second end ground connection；The control terminal of the first switch pipe connects the second end of the on-off circuit, the first end connection of the first switch pipe Second accessory power supply, the second end of the first switch pipe are the output end of the level shifting circuit.
- 2. level shifting circuit according to claim 1, it is characterised in that the circuit also includes：Electric discharge isolation branch road；The first end of the electric discharge isolation branch road connects the first output end of the tie point, and the of the electric discharge isolation branch road Two ends connect the first end of second branch road.
- 3. level shifting circuit according to claim 1 or 2, it is characterised in that the tie point, including：First is anti- Phase device and the second phase inverter；The input of first phase inverter is the input of the tie point, and the output end of first phase inverter connects institute State the first control terminal of on-off circuit；The input of second phase inverter connects the output end of first phase inverter, and the output end of second phase inverter connects Connect the second control terminal of the on-off circuit.
- 4. level shifting circuit according to claim 1 or 2, it is characterised in that the on-off circuit, including：Second opens Close pipe and the 3rd switching tube；The control terminal of the second switch pipe connects the first output end of the tie point, the first end of the second switch pipe First accessory power supply is connected, the second end of the second switch pipe connects the first end of the 3rd switching tube；Second end of the 3rd switching tube connects the first end of second branch road, the control terminal connection of the 3rd switching tube Second output end of the tie point.
- 5. level shifting circuit according to claim 1 or 2, it is characterised in that second branch road, including：4th opens Guan Guan；The first end of 4th switching tube connects the second end of the on-off circuit, the second termination of the 4th switching tube Ground, the control terminal of the 4th switching tube connect the second output end of the tie point.
- 6. level shifting circuit according to claim 2, it is characterised in thatThe electric discharge isolation circuit, including at least one isolation resistance；Or the electric discharge isolation circuit, include the isolation resistances of at least two serial or parallel connections；Or the electric discharge isolation circuit, include the isolation resistance that at least three connection in series-parallel connect.
- A kind of 7. level shifting circuit, it is characterised in that including：Tie point, the second branch road, on-off circuit, electric discharge isolation electricity Road and first switch pipe；The first end of the on-off circuit connects the first accessory power supply, and the second end of the on-off circuit connects the tie point The first output end, the first control terminal of the on-off circuit connects the first end of second branch road, the on-off circuit Second control terminal connects the second output end of the tie point；The input of the tie point is the input of the level shifting circuit, and the second end of second branch road is grounded；The first end of the electric discharge isolation circuit connects the first output end of the tie point, and the of the electric discharge isolation circuit Two ends connect the first end of second branch road；The control terminal of the first switch pipe connects the second end of the on-off circuit, the first end connection of the first switch pipe Second accessory power supply, the second end of the first switch pipe are the output end of the level shifting circuit.
- 8. level shifting circuit according to claim 7, it is characterised in that the tie point, including：First phase inverter With the second phase inverter；The input of first phase inverter is the input of the level shifting circuit, and the output end of first phase inverter connects Connect the second control terminal of the on-off circuit；The input of second phase inverter connects the output end of first phase inverter, and the output end of second phase inverter connects Connect the second end of the on-off circuit.
- 9. level shifting circuit according to claim 7, it is characterised in that the on-off circuit, including：Second switch pipe With the 3rd switching tube；The control terminal of the second switch pipe connects the first end of second branch road, the first end connection of the second switch pipe First accessory power supply, the second end of the second switch pipe connect the first end of the 3rd switching tube；Second end of the 3rd switching tube connects the first output end of the tie point, the control terminal of the 3rd switching tube Connect the second output end of the tie point.
- 10. level shifting circuit according to claim 7, it is characterised in that second branch road, including：4th switch Pipe；The first end of 4th switching tube connects the first control terminal of the on-off circuit, the second end of the 4th switching tube Ground connection, the control terminal of the 4th switching tube connect the second output end of the tie point.
- 11. according to the level shifting circuit described in claim 7-10 any one, it is characterised in thatThe electric discharge isolation circuit, including at least one isolation resistance；Or the electric discharge isolation circuit, include the isolation resistances of at least two serial or parallel connections；Or the electric discharge isolation circuit, include the isolation resistance that at least three connection in series-parallel connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086242.7A CN107682005B (en) | 2017-11-07 | 2017-11-07 | A kind of level shifting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086242.7A CN107682005B (en) | 2017-11-07 | 2017-11-07 | A kind of level shifting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107682005A true CN107682005A (en) | 2018-02-09 |
| CN107682005B CN107682005B (en) | 2019-04-30 |
Family
ID=61145758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711086242.7A Active CN107682005B (en) | 2017-11-07 | 2017-11-07 | A kind of level shifting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107682005B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040104756A1 (en) * | 2002-12-03 | 2004-06-03 | Payne James E. | Voltage level shifter circuit having high speed and low switching power |
| CN101312342A (en) * | 2007-05-23 | 2008-11-26 | 中芯国际集成电路制造(上海)有限公司 | Level switching circuit |
| CN101312345A (en) * | 2007-05-25 | 2008-11-26 | 三星电子株式会社 | Level conversion trigger and its operation method |
| CN102118156A (en) * | 2009-12-31 | 2011-07-06 | 中国科学院微电子研究所 | Level switching circuit and level switching method for OTP (One Time Programmable) peripheral circuit |
| US8384431B2 (en) * | 2010-12-09 | 2013-02-26 | Integrated Device Technology, Inc. | Voltage level shifting apparatuses and methods |
| CN104318957A (en) * | 2014-10-24 | 2015-01-28 | 中国人民解放军国防科学技术大学 | Level shifter |
-
2017
- 2017-11-07 CN CN201711086242.7A patent/CN107682005B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040104756A1 (en) * | 2002-12-03 | 2004-06-03 | Payne James E. | Voltage level shifter circuit having high speed and low switching power |
| CN101312342A (en) * | 2007-05-23 | 2008-11-26 | 中芯国际集成电路制造(上海)有限公司 | Level switching circuit |
| CN101312345A (en) * | 2007-05-25 | 2008-11-26 | 三星电子株式会社 | Level conversion trigger and its operation method |
| CN102118156A (en) * | 2009-12-31 | 2011-07-06 | 中国科学院微电子研究所 | Level switching circuit and level switching method for OTP (One Time Programmable) peripheral circuit |
| US8384431B2 (en) * | 2010-12-09 | 2013-02-26 | Integrated Device Technology, Inc. | Voltage level shifting apparatuses and methods |
| CN104318957A (en) * | 2014-10-24 | 2015-01-28 | 中国人民解放军国防科学技术大学 | Level shifter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107682005B (en) | 2019-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106602504B (en) | A kind of photovoltaic Quick shut-off device and photovoltaic system | |
| CN204425003U (en) | A kind of pre-charge circuit and hybrid vehicle | |
| CN105553246B (en) | Upper and lower electric drive circuit and its control method | |
| CN104979796A (en) | Pre-charged high speed direct current breaker and control method therefor | |
| CN206932057U (en) | The switching system of power supply circuit | |
| CN103368750A (en) | Power supply time sequence circuit and power supplying method | |
| CN107895982A (en) | Charging/discharging apparatus, method and device | |
| CN105186636B (en) | power charging circuit | |
| CN106655125A (en) | Method for online quit of single valve banks in hybrid direct-current systems | |
| CN107317568A (en) | Eliminate the oscillator of comparator imbalance voltage | |
| CN206922676U (en) | A kind of direct current generator and its positive and reverse rotation control circuit | |
| CN108390362A (en) | A kind of current diverting device and method suitable for hybrid dc circuit breaker | |
| CN105610425A (en) | Energizing protection circuit | |
| CN102412608A (en) | Charging and discharging circuit for electrical system | |
| CN107682005A (en) | A kind of level shifting circuit | |
| CN103354193A (en) | Relay drive circuit and relay control method | |
| CN207510227U (en) | Pre-charging device, system and electric vehicle | |
| CN209692351U (en) | A kind of car networking equipment reverse-connection preventing circuit and vehicle electronic device | |
| CN108400702A (en) | A kind of safety protective circuit and its control method | |
| CN210297244U (en) | Fast DC switch | |
| CN208094432U (en) | Power inverter protects circuit | |
| CN206727011U (en) | A kind of protection device | |
| CN109445511B (en) | 10 kilovolt thyristor valve group power regulating system | |
| CN104038032A (en) | Low-voltage precharging system for high-voltage variable frequency system, and control method of low-voltage precharging system | |
| CN110854961B (en) | Power-on impact current suppression circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |