CN109687862A - A kind of bidirectional level conversion circuit and two-way level converting chip - Google Patents
A kind of bidirectional level conversion circuit and two-way level converting chip Download PDFInfo
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- CN109687862A CN109687862A CN201910115541.1A CN201910115541A CN109687862A CN 109687862 A CN109687862 A CN 109687862A CN 201910115541 A CN201910115541 A CN 201910115541A CN 109687862 A CN109687862 A CN 109687862A
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- 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
- H03K19/017509—Interface arrangements
- H03K19/017518—Interface arrangements using a combination of bipolar and field effect transistors [BIFET]
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- 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
- H03K19/01759—Coupling arrangements; Interface arrangements with a bidirectional operation
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Abstract
The present invention provides a kind of bidirectional level conversion circuit and two-way level converting chip, including signal transfer tube, trombone slide on first, trombone slide and pull-up control module on second；The first end of trombone slide is electrically connected with first voltage end on first, second end is electrically connected with the first end of signal transfer tube, and the first end of trombone slide is electrically connected with second voltage end on second, second end is electrically connected with the second end of signal transfer tube；First signal input part of pull-up control module is electrically connected with the first end of signal transfer tube, second signal input terminal is electrically connected with the second end of signal transfer tube, output end is electrically connected with the grid of trombone slide on trombone slide on first and second, for in the first end and second end of signal transfer tube either end by the first level overturning be second electrical level when, export the first level pulse.Two upper trombone slides are controlled by a pull-up control module in the present invention, to can not only reduce module number and design complexities, but also can reduce chip area and cost.
Description
Technical field
The present invention relates to semiconductor integrated circuit technology fields, more specifically to a kind of bidirectional level conversion circuit
With two-way level converting chip.
Background technique
Electrical level transferring chip is one of chip type common in integrated circuit, is widely used in data transmission, logic
In the systems such as control and digital-to-analogue conversion.The effect of electrical level transferring chip is to pass the logic level signal under the lower voltage domain of one end
It transports under the higher voltage domains of the other end, alternatively, the logic level signal under the higher voltage domains of one end is transmitted to the other end
Under lower voltage domain, and reduce transmission delay as far as possible in transmission process, while keeping the integrality of signal.
In order to reduce the delay of level conversion, it usually needs fast pull-up pipe is added in output end.And in order to reduce pull-up
Power consumption caused by pipe constant conduction, it will usually the turn-on and turn-off of trombone slide on this are controlled using control module.But in two-way electricity
It in flat conversion chip, needs to be added two upper trombone slides and two control modules, not only increases module number in this way and design is multiple
Miscellaneous degree, and increase chip area and cost.
Summary of the invention
In view of this, the present invention provides a kind of two-way detection control circuit and two-way level converting chips, to reduce mould
Number of blocks and design complexities reduce chip area and cost.
To achieve the above object, the invention provides the following technical scheme:
A kind of bidirectional level conversion circuit, including signal transfer tube, trombone slide on first, trombone slide and pull-up control mould on second
Block；
The first end of trombone slide is electrically connected with first voltage end on described first, on described first the second end of trombone slide with it is described
The first end of signal transfer tube is electrically connected, and the first end of trombone slide is electrically connected with second voltage end on described second, on described second
The second end of trombone slide is electrically connected with the second end of the signal transfer tube；
It is described pull-up control module the first signal input part be electrically connected with the first end of the signal transfer tube, it is described on
The second signal input terminal of control module is drawn to be electrically connected with the second end of the signal transfer tube, it is described to pull up the defeated of control module
Outlet is electrically connected with the grid of trombone slide on trombone slide on described first and described second；
It is electric by first that the pull-up control module is used for the either end in the first end and second end of the signal transfer tube
When flat overturning is second electrical level, the first level pulse is exported, trombone slide conducting on trombone slide and described second in control described first will
It is second electrical level that the other end is drawn by the first level in the first end and second end.
Optionally, the pull-up control module includes the first signal input part, second signal input terminal, Port detecting mould
Block, two-way detection trigger module and pulse generation module；
The port detecting module is electrically connected with first signal input part and the second signal input terminal, is used for
When first signal input part and the second signal input terminal are all second electrical level, the first level is exported, described first
When at least one end is the first level in signal input part and the second signal input terminal, second electrical level is exported；
The two-way detection trigger module is electrically connected with first signal input part and the second signal input terminal, is used
In when first signal input part and the second signal input terminal are all the first level, second electrical level is exported, described
When at least one end is second electrical level in first signal input part and the second signal input terminal, the first level is exported；
The pulse generation module is electrically connected with the port detecting module and the two-way detection trigger module, is used for
First is converted to by second electrical level in the output of the port detecting module output second electrical level, the two-way detection trigger module
When level, the first level pulse is exported, exports second electrical level in other periods.
Optionally, the port detecting module includes NAND gate and the first phase inverter to the 4th phase inverter；
The input terminal of first phase inverter is electrically connected with first signal input part, the input of second phase inverter
End is electrically connected with the output end of first phase inverter, the output end of second phase inverter and an input of the NAND gate
End electrical connection；
The input terminal of the third phase inverter is electrically connected with the second signal input terminal, the input of the 4th phase inverter
End is electrically connected with the output end of the third phase inverter, and another of the output end of the 4th phase inverter and the NAND gate are defeated
Enter end electrical connection；
The output end of the NAND gate is electrically connected with the output end of the port detecting module.
Optionally, the two-way detection trigger module includes or door, the first transistor to the 5th transistor, the 5th phase inverter
With hex inverter；
Described or door the input terminal is electrically connected with first signal input part, another described or door input terminal
It is electrically connected with the second signal input terminal, described or door output end is electrically connected with the grid of the first transistor；
The first end of the first transistor is electrically connected with the second end of the second transistor, the second transistor
First end is electrically connected with power end, and the second end of the first transistor is electrically connected with the second end of third transistor, and described
The grid of three transistors is electrically connected with first signal input part, and first end and the ground terminal of the third transistor are electrically connected
It connects；
The second end of the first transistor is electrically connected with the second end of the 4th transistor, and the second of the 4th transistor
End is electrically connected by the 5th phase inverter with the grid of the 4th transistor, and the grid of the 4th transistor passes through the 6th reverse phase
Device is electrically connected with the grid of the second transistor；
The grid of 5th transistor is electrically connected with the second signal input terminal, the first end of the 5th transistor
It is electrically connected with ground terminal, the second end of the 5th transistor is electrically connected with the second end of the 4th transistor；
The second end of 4th transistor is electrically connected with the output end of the two-way detection trigger module.
Optionally, the first transistor, second transistor and the 4th transistor are PMOS transistor, the third crystal
Pipe and the 5th transistor are NMOS transistor.
Optionally, the pulse generation module includes the 6th transistor to the 8th transistor, first resistor, the second electricity
Resistance, the 7th phase inverter, the 8th phase inverter, the 9th phase inverter and nor gate；
The first end of 6th transistor is electrically connected with power end, the grid of the 6th transistor and the two-way inspection
The output end electrical connection of trigger module is surveyed, the second end of the 6th transistor is electrically connected with one end of the first resistor, institute
The other end for stating first resistor is electrically connected with one end of the second resistance, the other end of the second resistance and the 7th crystalline substance
The first end of body pipe is electrically connected, and the second end of the 7th transistor is electrically connected with ground terminal, the grid of the 7th transistor
It is electrically connected with the output end of the two-way detection trigger module；
The grid of 8th transistor is electrically connected with the output end of the port detecting module, the 8th transistor
First end is electrically connected with one end of the first resistor, the second end of the 8th transistor and the other end of the first resistor
Electrical connection；
The input terminal of 7th phase inverter is electrically connected with the other end of the second resistance, the 7th phase inverter it is defeated
Outlet is electrically connected with the input terminal of the 8th phase inverter, and one of the output end of the 8th phase inverter and the nor gate is defeated
Enter end electrical connection, the output end of the two-way detection trigger module is electrically connected with another input terminal of the nor gate, described
The output end of nor gate is electrically connected with the input terminal of the 9th phase inverter, the output end and the simple venation of the 9th phase inverter
Rush the output end electrical connection of generation module.
Optionally, the 6th transistor and the 8th transistor are PMOS transistor, and the 7th transistor is
NMOS transistor.
Optionally, trombone slide is PMOS transistor on trombone slide and described second on described first；First level is low electricity
Flat, the second electrical level is high level.
It optionally, further include driving circuit；
The driving circuit is used for when the both ends of the signal transfer tube are all the first level, controls the signal transmission
Pipe conducting.
A kind of two-way level converting chip, including as above described in any item bidirectional level conversion circuits.
Compared with prior art, the technical scheme provided by the invention has the following advantages:
Bidirectional level conversion circuit provided by the present invention and two-way level converting chip, pull-up control module are passed in signal
In the first end and second end of defeated pipe either end by the first level overturning be second electrical level when, export the first level pulse, control
Trombone slide is connected on trombone slide and second on first, and the other end in first end and second end is drawn by the first level as second electrical level,
That is trombone slide is controlled by a pull-up control module on trombone slide and second on first in the present invention, to can not only reduce
Module number and design complexities, and can reduce chip area and cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of existing structural schematic diagram of bidirectional level conversion circuit；
Fig. 2 is a kind of structural schematic diagram of bidirectional level conversion circuit provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of pull-up control module provided in an embodiment of the present invention；
Fig. 4 is the signal timing diagram of pull-up control module provided in an embodiment of the present invention.
Specific embodiment
As described in background, in existing two-way level converting chip, need to be added two upper trombone slides and two controls
Molding block.As shown in FIG. 1, FIG. 1 is a kind of existing structural schematic diagrams of two-way level converting chip, when signal transmission end MN's
First end A by the first level overturning be second electrical level when, the second control module control second on trombone slide MP2 conducting, signal is passed
It is second electrical level that the second end B of defeated end MN is drawn by the first level；When the second end B of signal transmission end MN is by the overturning of the first level
When second electrical level, trombone slide MP1 conducting in the first control module control first, by the first end A of signal transmission end MN by the first electricity
Horizontal drawing is second electrical level.Since two upper trombone slides in Fig. 1 pass through control module control respectively, not only increase module
Quantity and design complexities, and increase chip area and cost.
Based on this, the present invention provides a kind of bidirectional level conversion circuits, to overcome the above problem of the existing technology,
Including trombone slide on trombone slide on signal transfer tube, first, second and pull-up control module；
The first end of trombone slide is electrically connected with first voltage end on described first, on described first the second end of trombone slide with it is described
The first end of signal transfer tube is electrically connected, and the first end of trombone slide is electrically connected with second voltage end on described second, on described second
The second end of trombone slide is electrically connected with the second end of the signal transfer tube；
It is described pull-up control module the first signal input part be electrically connected with the first end of the signal transfer tube, it is described on
The second signal input terminal of control module is drawn to be electrically connected with the second end of the signal transfer tube；The two-way detection control circuit
Output end be electrically connected with the grid of trombone slide on trombone slide on described first and described second；
It is electric by first that the pull-up control module is used for the either end in the first end and second end of the signal transfer tube
When flat overturning is second electrical level, the first level pulse is exported, trombone slide conducting on trombone slide and described second in control described first will
It is second electrical level that the other end is drawn by the first level in the first end and second end.
Bidirectional level conversion circuit provided by the invention, first end and second end of the pull-up control module in signal transfer tube
Middle either end by the first level overturning be second electrical level when, export the first level pulse, control first on trombone slide and second pull-up
Pipe conducting, the other end in first end and second end is drawn by the first level as second electrical level, that is to say, that on first in the present invention
Trombone slide is controlled by a pull-up control module on trombone slide and second, so that module number and design complexities can be not only reduced,
And it can reduce chip area and cost.
It is core of the invention thought above, to keep the above objects, features and advantages of the present invention more obvious easily
Understand, following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of bidirectional level conversion circuit, which can be applied to electricity
Flat conversion chip, logic control chip and data transmission chip etc., as shown in Fig. 2, the bidirectional level conversion circuit includes signal
Transfer tube MN, trombone slide MP1 on first, trombone slide MP2 and pull-up control module on second.
Wherein, the first end of trombone slide MP1 is electrically connected with first voltage end VA on first, the second end of trombone slide MP1 on first
It being electrically connected with the first end A of signal transfer tube MN, the first end of trombone slide MP2 is electrically connected with second voltage end VB on second, and second
The second end of upper trombone slide MP2 is electrically connected with the second end B of signal transfer tube MN；
First signal input part LA of pull-up control module is electrically connected with the first end A of signal transfer tube MN, pull-up control
The second signal input terminal LB of module is electrically connected with the second end B of signal transfer tube MN, pulls up the output end LOUT of control module
With the grid of trombone slide MP2 is electrically connected on trombone slide MP1 and second on first；
Pull-up control module is used for the either end in the first end A and second end B of signal transfer tube MN and is turned over by the first level
When switching to second electrical level, the first level pulse is exported, i.e. output duration is the first level of t, controls trombone slide MP1 on first
With second on trombone slide MP2 conducting, the other end in first end A and second end B is drawn by the first level as second electrical level.
That is, the output of pull-up control module is at the first time when first end A is second electrical level by the overturning of the first level
First level of section controls trombone slide MP2 conducting on trombone slide MP1 and second on first.Due to trombone slide MP2 conducting on second,
Second end B can be drawn by the first level as second electrical level, be equivalent to and the second electrical level signal of first end A has been transferred to second
Hold B.
When second end B is second electrical level by the overturning of the first level, the first of pull-up control module output first time period
Level controls trombone slide MP2 conducting on trombone slide MP1 and second on first.Due to trombone slide MP1 conducting on first, it can be by the
It is second electrical level that one end A is drawn by the first level, is equivalent to the second electrical level signal of second end B being transferred to first end A.
Based on this, the two-way of level shifting circuit can be realized by a pull-up control module in the embodiment of the present invention
Second electrical level transmission, without two pull-up control modules, and then can reduce module number and design complexities, reduce
Chip area and cost.
Wherein, when trombone slide MP2 is PMOS transistor on trombone slide MP1 and second on first, the first level is low level, when
When trombone slide MP2 is NMOS transistor on trombone slide MP1 and second on first, the first level is high level.In the embodiment of the present invention only
It is said so that trombone slide MP2 is PMOS transistor, signal transfer tube MN is NMOS transistor on trombone slide MP1 and second on first as an example
It is bright.
It should be noted that as shown in Fig. 2, the bidirectional level conversion circuit in the embodiment of the present invention further includes driving electricity
Road；Driving circuit is used for when the both ends of signal transfer tube MN are all the first level, control signal transfer tube MN conducting.Specifically
Ground, when signal transfer tube MN is NMOS transistor, driving circuit is used for when the both ends of signal transfer tube MN are all low level,
Signal transfer tube MN conducting is controlled, when the both ends of signal transfer tube MN are all high level, control signal transfer tube MN is disconnected.
That is, the bidirectional level conversion circuit in the embodiment of the present invention, is all low electricity in first end A and second end B
Usually, control signal transfer tube MN conducting, realizes the transmission of two voltage domain signals, the either end in first end A and second end B
When for high level, the other end pull up as high level, realization two by trombone slide MP2 conducting on trombone slide MP1 or second in control first
The transmission of voltage domain signal.
As shown in figure 3, the pull-up control module in the embodiment of the present invention is defeated including the first signal input part LA, second signal
Enter to hold LB, port detecting module, two-way detection trigger module and pulse generation module.
Wherein, port detecting module is electrically connected with the first signal input part LA and second signal input terminal LB, for the
When one signal input part LA and second signal input terminal LB is second electrical level, the first level is exported, in the first signal input part
When at least one end is the first level in LA and second signal input terminal LB, second electrical level is exported；Two-way detection trigger module and
One signal input part LA and second signal input terminal LB electrical connection, in the first signal input part LA and second signal input terminal
When LB is the first level, second electrical level is exported, at least one end in the first signal input part LA and second signal input terminal LB
When for second electrical level, the first level is exported；Pulse generation module is electrically connected with port detecting module and two-way detection trigger module
It connects, for being converted to first by second electrical level in the output of port detecting module output second electrical level, two-way detection trigger module
When level, the first level pulse is exported, exports second electrical level in other periods.
Optionally, as shown in figure 3, port detecting module includes NAND gate NA and the first phase inverter NV1 to the 4th phase inverter
NV4；The input terminal of first phase inverter NV1 is electrically connected with the first signal input part LA, the input terminal and first of the second phase inverter NV2
The output end of phase inverter NV1 is electrically connected, and the output end of the second phase inverter NV2 is electrically connected with an input terminal of NAND gate NA；The
The input terminal of three phase inverter NV3 is electrically connected with second signal input terminal LB, the input terminal and third phase inverter of the 4th phase inverter NV4
The output end of NV3 is electrically connected, and the output end of the 4th phase inverter NV4 is electrically connected with another input terminal of NAND gate NA；NAND gate
The output end of NA is electrically connected with the output terminals A 1 of port detecting module.
As shown in figure 3, two-way detection trigger module includes or door OR, the first transistor M1 are to the 5th transistor M5, the 5th
Phase inverter NV5 and hex inverter NV6；Or an input terminal of door OR is electrically connected with the first signal input part LA or door OR
Another input terminal is electrically connected with second signal input terminal LB or the output end of door OR and the grid of the first transistor M1 are electrically connected
It connects；The first end of the first transistor M1 is electrically connected with the second end of second transistor M2, the first end and electricity of second transistor M2
Source VDD electrical connection, the second end of the first transistor M1 are electrically connected with the second end of third transistor M3, third transistor M3's
Grid is electrically connected with the first signal input part LA, and the first end of third transistor M3 is electrically connected with ground terminal GND；The first transistor
The second end of M1 is electrically connected with the second end of the 4th transistor M4, and the second end of the 4th transistor M4 passes through the 5th phase inverter NV5
It is electrically connected with the grid of the 4th transistor M4, the grid of the 4th transistor M4 passes through hex inverter NV6 and second transistor M2
Grid electrical connection；The grid of 5th transistor M5 is electrically connected with second signal input terminal LB, the first end of the 5th transistor M5
It is electrically connected with ground terminal GND, the second end of the 5th transistor M5 is electrically connected with the second end of the 4th transistor M4；4th transistor
The second end of M4 is electrically connected with the output terminals A 2 of two-way detection trigger module.
As shown in figure 3, pulse generation module includes the 6th transistor M6 to the 8th transistor M8, first resistor R1, the
Two resistance R2, the 7th phase inverter NV7, the 8th phase inverter NV8, the 9th phase inverter NV9 and nor gate NOR；6th transistor M6's
First end is electrically connected with power end VDD, and the grid of the 6th transistor M6 is electrically connected with the output terminals A 2 of two-way detection trigger module,
The second end of 6th transistor M6 is electrically connected with one end of first resistor R1, and the other end of first resistor R1 is with second resistance R2's
One end electrical connection, the other end of second resistance R2 are electrically connected with the first end of the 7th transistor M7, and the second of the 7th transistor M7
End is electrically connected with ground terminal GND, and the grid of the 7th transistor M7 is electrically connected with the output terminals A 2 of two-way detection trigger module；8th
The grid of transistor M8 is electrically connected with the output terminals A 1 of port detecting module, the first end and first resistor R1 of the 8th transistor M8
One end electrical connection, the second end of the 8th transistor M8 is electrically connected with the other end of first resistor R1；7th phase inverter NV7's is defeated
Enter end to be electrically connected with the other end of second resistance R2, the output end of the 7th phase inverter NV7 and the input terminal electricity of the 8th phase inverter NV8
Connection, the output end AND OR NOT gate NOR of the 8th phase inverter NV8 an input terminal electrical connection, two-way detection trigger module it is defeated
Another input terminal of outlet A2 AND OR NOT gate NOR is electrically connected, the input of the output end of nor gate NOR and the 9th phase inverter NV9
End electrical connection, the output end of the 9th phase inverter NV9 are electrically connected with the output end LOUT of pulse generation module.
Wherein, the first transistor M1, second transistor M2 and the 4th transistor M4 are PMOS transistor, third transistor M3
It is NMOS transistor with the 5th transistor M5, the 6th transistor M6 and the 8th transistor M8 are PMOS transistor, the 7th transistor
M7 is NMOS transistor.Certainly, the present invention is not limited to this, in other embodiments, the first transistor M1, second transistor
M2 and the 4th transistor M4 can also be NMOS transistor, and third transistor M3 and the 5th transistor M5 can also be PMOS crystal
Pipe, the 6th transistor M6 and the 8th transistor M8 can also be NMOS transistor, and the 7th transistor M7 can also be PMOS crystal
Pipe.
It is that high level is illustrated using the first level as low level, second electrical level, when first end A and second end with reference to Fig. 4
When B is low level, i.e. when the first signal input part LA and second signal input terminal LB is low level, output terminals A 1 exports high electricity
Flat or door OR exports low level, the first transistor M1 conducting, since the first signal input part LA and second signal input terminal LB are
Low level, therefore, third transistor M3 and the 5th transistor M5 disconnect, and output terminals A 2 exports high level, so that the 4th transistor
M4 conducting, 2 weak pull-up of output terminals A is locked.Since output terminals A 1 exports high level, the 8th transistor M8 is disconnected.Due to
Output terminals A 2 exports high level, and therefore, the 6th transistor M6 is disconnected, and the 7th transistor M7 conducting is defeated by one of nor gate NOR
Entering to hold A3 drop-down is low level.It is connected since nor gate NOR obtained another input terminal with output terminals A 2, nor gate NOR
Low level is exported, output end LOUT exports high level, and trombone slide MP2 is disconnected on trombone slide MP1 and second in control first.
When in first end A and second end B either end by low level overturning be high level when, as first end A is turned over by low level
When switching to high level, the first signal input part LA is high level, third transistor M3 conducting, by output terminals A 2 by low level overturning
Drop-down is low level, at this point, it is high level that node A4 can be overturn by low level, still, since electric current can be by first resistor at this time
R1 and second resistance R2 limitation, causes node A4 that can generate delay, so that node A3 is that high level can also produce from low level overturning
Raw delay, therefore, output end LOUT can export the low level of certain period of time t, trombone slide on trombone slide MP1 and second in control first
MP2 conducting, second end B is pulled up by low level as high level.Wherein, t=(R1+R2) * C, C are the parasitic capacitance of node A4.
Also, after the t time, node A3 overturning is high level, and output end LOUT exports high level, trombone slide MP1 and the in control first
Trombone slide MP2 is disconnected on two.In addition, t1 is less than t when second end B is pulled to high level at t1, the overturning of output terminals A 1 is low
Level, the 8th transistor M8 conducting, so that the electric current for flowing through the 6th transistor M6 increases, so that output end LOUT is mentioned
Preceding overturning is high level, and trombone slide on trombone slide MP1 and second can be quickly disconnected on first after second end B is pulled to high level
MP2, and then can reduce the power consumption of trombone slide MP2 on trombone slide MP1 and second on first.
When first end A and second end B are high level, i.e. the first signal input part LA and second signal input terminal LB are
When for high level, output terminals A 1 is high level, and output terminals A 2 is low level, second transistor M2 conducting, and the first transistor M1 is disconnected
It opens, the 8th transistor M8 conducting, output end LOUT exports high level, and trombone slide MP2 is disconnected on trombone slide MP1 and second in control first
It opens.
When in first end A and second end B either end by high level overturning be low level when, i.e. the first signal input part LA and
When either end by high level overturning is low level in second signal input terminal LB, output terminals A 1 exports high level, and output terminals A 2 is
Low level, the 8th transistor M8 are disconnected, other maintain the original state, and output end LOUT exports high level, trombone slide MP1 in control first
With second on trombone slide MP2 disconnect.
When first end A and second end B are low level, i.e. the first signal input part LA and second signal input terminal LB are
When for low level, third transistor M3 and the 5th transistor M5 are disconnected, the first transistor M1 conducting, and output terminals A 2 is drawn as high electricity
Second transistor M2 is disconnected after flat, and node A3 and A4 overturning are low level, and output end LOUT exports high level, at this point, pull-up control
Molding block be wait state, when in first end A and second end B either end by low level overturning be high level when, pull-up control mould
Block exports low level pulse, trombone slide MP2 conducting on trombone slide MP1 and second in control first.
The embodiment of the invention also provides a kind of two-way level converting chips, provide including any of the above-described embodiment two-way
Level shifting circuit.
Bidirectional level conversion circuit provided by the invention and two-way level converting chip, pull-up control module are transmitted in signal
When either end by the overturning of the first level is second electrical level in the first end and second end of pipe, the first level pulse, control the are exported
Trombone slide is connected on trombone slide and second on one, the other end in first end and second end is drawn by the first level as second electrical level, also
It is to say, trombone slide is controlled by a pull-up control module on trombone slide and second on first in the present invention, to can not only reduce mould
Number of blocks and design complexities, and can reduce chip area and cost.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.To the upper of the disclosed embodiments
It states bright, enables those skilled in the art to implement or use the present invention.Various modifications to these embodiments are to ability
Will be apparent for the professional technician in domain, the general principles defined herein can not depart from it is of the invention
In the case where spirit or scope, realize in other embodiments.Therefore, the present invention be not intended to be limited to it is shown in this article these
Embodiment, and it is to fit to the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. a kind of bidirectional level conversion circuit, which is characterized in that including trombone slide on trombone slide on signal transfer tube, first, second and
Pull up control module；
The first end of trombone slide is electrically connected with first voltage end on described first, the second end of trombone slide and the signal on described first
The first end of transfer tube is electrically connected, and the first end of trombone slide is electrically connected with second voltage end on described second, trombone slide on described second
Second end be electrically connected with the second end of the signal transfer tube；
First signal input part of the pull-up control module is electrically connected with the first end of the signal transfer tube, the pull-up control
The second signal input terminal of molding block is electrically connected with the second end of the signal transfer tube, the output end of the pull-up control module
It is electrically connected with the grid of trombone slide on trombone slide on described first and described second；
The pull-up control module is used for the either end in the first end and second end of the signal transfer tube and is turned over by the first level
When switching to second electrical level, the first level pulse is exported, trombone slide conducting on trombone slide and described second in control described first will be described
It is second electrical level that the other end is drawn by the first level in first end and second end.
2. circuit according to claim 1, which is characterized in that the pull-up control module include the first signal input part,
Second signal input terminal, port detecting module, two-way detection trigger module and pulse generation module；
The port detecting module is electrically connected with first signal input part and the second signal input terminal, for described
When first signal input part and the second signal input terminal are all second electrical level, the first level is exported, in first signal
When at least one end is the first level in input terminal and the second signal input terminal, second electrical level is exported；
The two-way detection trigger module is electrically connected with first signal input part and the second signal input terminal, is used for
When first signal input part and the second signal input terminal are all the first level, second electrical level is exported, described first
When at least one end is second electrical level in signal input part and the second signal input terminal, the first level is exported；
The pulse generation module is electrically connected with the port detecting module and the two-way detection trigger module, in institute
The output for stating port detecting module output second electrical level, the two-way detection trigger module is converted to the first level by second electrical level
When, the first level pulse is exported, exports second electrical level in other periods.
3. circuit according to claim 2, which is characterized in that the port detecting module includes NAND gate and the first reverse phase
Device is to the 4th phase inverter；
The input terminal of first phase inverter is electrically connected with first signal input part, the input terminal of second phase inverter with
The output end of first phase inverter is electrically connected, the output end of second phase inverter and an input terminal electricity of the NAND gate
Connection；
The input terminal of the third phase inverter is electrically connected with the second signal input terminal, the input terminal of the 4th phase inverter with
The output end of the third phase inverter is electrically connected, the output end of the 4th phase inverter and another input terminal of the NAND gate
Electrical connection；
The output end of the NAND gate is electrically connected with the output end of the port detecting module.
4. circuit according to claim 3, which is characterized in that the two-way detection trigger module includes or door, first brilliant
Five transistor of body Guan Zhi, the 5th phase inverter and hex inverter；
Described or door the input terminal is electrically connected with first signal input part, another described or door input terminal and institute
The electrical connection of second signal input terminal is stated, described or door output end is electrically connected with the grid of the first transistor；
The first end of the first transistor is electrically connected with the second end of the second transistor, and the first of the second transistor
End is electrically connected with power end, and the second end of the first transistor is electrically connected with the second end of third transistor, and the third is brilliant
The grid of body pipe is electrically connected with first signal input part, and the first end of the third transistor is electrically connected with ground terminal；
The second end of the first transistor is electrically connected with the second end of the 4th transistor, and the second end of the 4th transistor is logical
The 5th phase inverter is crossed to be electrically connected with the grid of the 4th transistor, the grid of the 4th transistor by hex inverter with
The grid of the second transistor is electrically connected；
The grid of 5th transistor is electrically connected with the second signal input terminal, the first end of the 5th transistor with connect
Ground terminal electrical connection, the second end of the 5th transistor are electrically connected with the second end of the 4th transistor；
The second end of 4th transistor is electrically connected with the output end of the two-way detection trigger module.
5. circuit according to claim 4, which is characterized in that the first transistor, second transistor and the 4th crystal
Pipe is PMOS transistor, and the third transistor and the 5th transistor are NMOS transistor.
6. circuit according to claim 4, which is characterized in that the pulse generation module includes the 6th transistor to the
Eight transistors, first resistor, second resistance, the 7th phase inverter, the 8th phase inverter, the 9th phase inverter and nor gate；
The first end of 6th transistor is electrically connected with power end, and the grid of the 6th transistor and the two-way detection are touched
The output end electrical connection of module is sent out, the second end of the 6th transistor is electrically connected with one end of the first resistor, and described the
The other end of one resistance is electrically connected with one end of the second resistance, the other end of the second resistance and the 7th transistor
First end electrical connection, the second end of the 7th transistor is electrically connected with ground terminal, the grid of the 7th transistor and institute
State the output end electrical connection of two-way detection trigger module；
The grid of 8th transistor is electrically connected with the output end of the port detecting module, and the first of the 8th transistor
End is electrically connected with one end of the first resistor, and the other end of the second end and the first resistor of the 8th transistor is electrically connected
It connects；
The input terminal of 7th phase inverter is electrically connected with the other end of the second resistance, the output end of the 7th phase inverter
It is electrically connected with the input terminal of the 8th phase inverter, the output end of the 8th phase inverter and an input terminal of the nor gate
Electrical connection, the output end of the two-way detection trigger module is electrically connected with another input terminal of the nor gate, described or non-
The output end of door is electrically connected with the input terminal of the 9th phase inverter, and the output end and the pulse of the 9th phase inverter produce
The output end electrical connection of raw module.
7. circuit according to claim 6, which is characterized in that the 6th transistor and the 8th transistor are PMOS
Transistor, the 7th transistor are NMOS transistor.
8. described in any item circuits according to claim 1~8, which is characterized in that on described first on trombone slide and described second
Trombone slide is PMOS transistor；First level is low level, and the second electrical level is high level.
9. circuit according to claim 1, which is characterized in that further include driving circuit；
The driving circuit is used for when the both ends of the signal transfer tube are all the first level, is controlled the signal transfer tube and is led
It is logical.
10. a kind of two-way level converting chip, which is characterized in that turn including bidirectional level according to any one of claims 1 to 9
Change circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910115541.1A CN109687862A (en) | 2019-02-14 | 2019-02-14 | A kind of bidirectional level conversion circuit and two-way level converting chip |
| PCT/CN2020/074417 WO2020164434A1 (en) | 2019-02-14 | 2020-02-06 | Bidirectional level conversion circuit and bidirectional level conversion chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910115541.1A CN109687862A (en) | 2019-02-14 | 2019-02-14 | A kind of bidirectional level conversion circuit and two-way level converting chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109687862A true CN109687862A (en) | 2019-04-26 |
Family
ID=66195825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910115541.1A Pending CN109687862A (en) | 2019-02-14 | 2019-02-14 | A kind of bidirectional level conversion circuit and two-way level converting chip |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109687862A (en) |
| WO (1) | WO2020164434A1 (en) |
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| CN110138359A (en) * | 2019-05-20 | 2019-08-16 | 上海艾为电子技术股份有限公司 | Pulse generation circuit and level shifting circuit |
| WO2020164434A1 (en) * | 2019-02-14 | 2020-08-20 | 上海艾为电子技术股份有限公司 | Bidirectional level conversion circuit and bidirectional level conversion chip |
| CN111817705A (en) * | 2020-07-27 | 2020-10-23 | 中国电子科技集团公司第五十八研究所 | Self-induction self-acceleration bidirectional level conversion circuit |
| CN112769428A (en) * | 2019-11-04 | 2021-05-07 | 广东美芝制冷设备有限公司 | Electronic equipment and bidirectional level conversion communication method and circuit |
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| WO2020164434A1 (en) | 2020-08-20 |
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