CN101902215B - Four-input terminal comparator - Google Patents
Four-input terminal comparator Download PDFInfo
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- CN101902215B CN101902215B CN2010102427268A CN201010242726A CN101902215B CN 101902215 B CN101902215 B CN 101902215B CN 2010102427268 A CN2010102427268 A CN 2010102427268A CN 201010242726 A CN201010242726 A CN 201010242726A CN 101902215 B CN101902215 B CN 101902215B
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Abstract
The invention discloses a four-input terminal comparator which is provided with four input terminals. When the comparator is applied to a similar proposal for a plurality of batteries, only one reference source is required, thus saving chip area and cost and improving circuit performance. The technical scheme of the invention is as follows: the comparator is provided with a first MOS, a second MOS, a third MOS and a fourth MOS, wherein the grid electrodes of the first MOS and the second MOS are respectively connected with a first input voltage and a second input voltage, and the source electrodes of the first MOS and the second MOS are respectively connected with a third input voltage and a fourth input voltage; the third MOS and the fourth MOS form a current mirror structure, and the third MOS forms a diode connection mode; and the drain electrode of the third MOS is connected to the drain electrode of the first MOS, the drain electrode of the fourth MOS is connected to the drain electrode of the second MOS, and drain output is taken as output of the comparator.
Description
Technical field
The present invention relates to a kind of comparator, relate in particular to a kind of comparator, and be suitable in the monolithic integrated circuit chip, using with four inputs.
Background technology
In field of analog integrated circuit, the application of comparator is very extensive.Comparator is to supply late-class circuit to handle through two voltages being compared and export the high-low level signal.
Traditional comparator is as shown in Figure 1, and comparator is made up of the first order and the second level, and the first order is by importing managing M1 and M2, load to pipe M3 and M4 and current source I
B1Constitute, the second level is by metal-oxide-semiconductor M5 and current source I
bConstitute.Comparative voltage is connected to the grid of M1, M2 respectively, from Fig. 1, sees, i.e. the first input voltage V
InInput to the grid of M1, the second input voltage V
IpInput to the grid of M2.
The input comparative voltage V of tradition comparator
InAnd V
IpAll be with respect to same current potential (V
Gnd), this comparator is to V
In-V
GndAnd V
Ig-V
GndTwo voltage differences compare.
Work as V
In-V
Gnd=V
Ip-V
Gnd, promptly work as V
In=V
IpThe time comparator output voltage V
OutUpset.If do not consider the power supply potential V of comparator
DDAnd earth potential V
Gnd, the input voltage of traditional comparator has two V
InAnd V
Ip, therefore can claim that the conventional voltage comparator is the double input end voltage comparator, also can be expressed as as shown in Figure 2.
In actual application, one of them input of comparator shown in Figure 2 is connected to reference voltage V
Ref, the other end is connected to the voltage that needs detection.
Because two inputs of traditional comparator all are with respect to same current potential, so when the relative current potential of the voltage that needs to detect changes, corresponding reference voltage V
RefNeed too to change.
For example in multi-section lithium ion battery applications scheme; Need detect voltage of batteries; The implementation method that adopts traditional comparator is that a reference voltage need be provided between every batteries, then the dividing potential drop of multiple batteries is compared with corresponding reference voltage.For example as shown in Figure 3, owing to be four batteries, therefore need four reference voltages.VC1～VC4 represents the positive input terminal of four batteries respectively among Fig. 3, and Vd1～Vd4 represents four batteries dividing potential drop separately, V respectively
Ref1～V
Ref4Represent the corresponding reference voltage of each batteries respectively, satisfy relational expression:
V
ref4-V
gnd＝V
ref3-V
c4＝V
ref2-V
c3＝V
ref1-V
c2
There is certain limitation in this implementation:
(1) each batteries needs a reference voltage, and along with the increase of number of batteries, reference source circuit also increases thereupon, and corresponding area of chip and cost can increase thereupon.
(2) the not matching property of the reference source circuit between every batteries (Mismatch) can be introduced extra error, can bring influence to the precision of integral body.
Summary of the invention
The objective of the invention is to address the above problem, a kind of four-input terminal comparator is provided, have four inputs, only need an a reference source in the time of in being applied in similar multiple batteries scheme, saved chip area and cost, improved circuit performance.
Technical scheme of the present invention is: the present invention has disclosed a kind of four-input terminal comparator, comprising:
First metal-oxide-semiconductor and second metal-oxide-semiconductor, wherein the grid of first metal-oxide-semiconductor connects first input voltage, and the grid of second metal-oxide-semiconductor connects second input voltage, and the source electrode of first metal-oxide-semiconductor connects the 3rd input voltage, and the source electrode of second metal-oxide-semiconductor connects the 4th input voltage;
The 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor; Wherein the grid of the 3rd metal-oxide-semiconductor with the drain electrode short circuit; The source electrode of the 3rd metal-oxide-semiconductor connects supply voltage, and the drain electrode of the 3rd metal-oxide-semiconductor connects the drain electrode of first metal-oxide-semiconductor, and the grid of the 4th metal-oxide-semiconductor links to each other with the grid of the 3rd metal-oxide-semiconductor; The source electrode of the 4th metal-oxide-semiconductor connects supply voltage, and the drain electrode of the 4th metal-oxide-semiconductor connects the drain electrode of second metal-oxide-semiconductor and is the output of four-input terminal comparator.
According to an embodiment of four-input terminal comparator of the present invention, first metal-oxide-semiconductor and second metal-oxide-semiconductor measure-alike, the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor measure-alike.
According to an embodiment of four-input terminal comparator of the present invention, this four-input terminal comparator also comprises:
The 5th metal-oxide-semiconductor, its grid connects the drain electrode of the 4th metal-oxide-semiconductor, and its source electrode connects supply voltage, and its drain electrode connects a current source and is the output of four-input terminal comparator, the other end ground connection of current source.
According to an embodiment of four-input terminal comparator of the present invention, the source electrode of first metal-oxide-semiconductor is connected with first resistance, and the source electrode of second metal-oxide-semiconductor is connected with second resistance.
According to an embodiment of four-input terminal comparator of the present invention, the source ground of first metal-oxide-semiconductor.
The present invention has also disclosed a kind of four-input terminal comparator, comprising:
First metal-oxide-semiconductor and second metal-oxide-semiconductor, wherein the grid of first metal-oxide-semiconductor connects first input voltage, and the grid of second metal-oxide-semiconductor connects second input voltage, and the source electrode of first metal-oxide-semiconductor connects the 3rd input voltage, and the source electrode of second metal-oxide-semiconductor connects the 4th input voltage;
The 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor; The drain and gate short circuit of the 3rd metal-oxide-semiconductor wherein; The source ground of the 3rd metal-oxide-semiconductor, the drain electrode of the 3rd metal-oxide-semiconductor connects the drain electrode of first metal-oxide-semiconductor, and the grid of the 4th metal-oxide-semiconductor links to each other with the grid of the 3rd metal-oxide-semiconductor; The source ground of the 4th metal-oxide-semiconductor, the drain electrode of the 4th metal-oxide-semiconductor connect the drain electrode of second metal-oxide-semiconductor and are the output of four-input terminal comparator.
According to an embodiment of four-input terminal comparator of the present invention, first metal-oxide-semiconductor and second metal-oxide-semiconductor measure-alike, the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor measure-alike.
According to an embodiment of four-input terminal comparator of the present invention, this four-input terminal comparator also comprises:
The 5th metal-oxide-semiconductor, its grid connects the drain electrode of the 4th metal-oxide-semiconductor, its source ground, its drain electrode connects a current source and is the output of four-input terminal comparator, another termination supply voltage of current source.
According to an embodiment of four-input terminal comparator of the present invention, the source electrode of first metal-oxide-semiconductor is connected with first resistance, and the source electrode of second metal-oxide-semiconductor is connected with second resistance.
According to an embodiment of four-input terminal comparator of the present invention, the grid of second metal-oxide-semiconductor connects a reference voltage.
The present invention has disclosed a kind of four-input terminal comparator again, comprising:
First triode and second triode; Wherein the base stage of first triode connects first input voltage; The base stage of second triode connects second input voltage, and the emitter of first triode connects the 3rd input voltage, and the emitter of second triode connects the 4th input voltage;
The 3rd triode and the 4th triode; The wherein base stage of the 3rd triode and collector electrode short circuit; The emitter of the 3rd triode connects supply voltage, and the collector electrode of the 3rd triode connects the collector electrode of first triode, and the base stage of the 4th triode links to each other with the base stage of the 3rd triode; The emitter of the 4th triode connects supply voltage, and the collector electrode of the collector electrode of the 4th triode and second triode links to each other and is the output of four-input terminal comparator.
According to an embodiment of four-input terminal comparator of the present invention, first triode and second triode measure-alike, the 3rd triode and the 4th triode measure-alike.
According to an embodiment of four-input terminal comparator of the present invention, this four-input terminal comparator also comprises:
The 5th triode, its base stage connects the collector electrode of the 4th triode, and its emitter connects supply voltage, and its collector electrode connects a current source and is the output of four-input terminal comparator, the other end ground connection of current source.
According to an embodiment of four-input terminal comparator of the present invention, the emitter of first triode is connected with first resistance, and the emitter of second triode is connected with second resistance.
The present invention has disclosed a kind of four-input terminal comparator in addition, comprising:
First triode and second triode; Wherein the base stage of first triode connects first input voltage; The base stage of second triode connects second input voltage, and the emitter of first triode connects the 3rd input voltage, and the emitter of second triode connects the 4th input voltage;
The 3rd triode and the 4th triode; The wherein collector electrode of the 3rd triode and base stage short circuit; The collector electrode of the 3rd triode connects the collector electrode of first triode, the grounded emitter of the 3rd triode, and the base stage of the 4th triode links to each other with the base stage of the 3rd triode; The grounded emitter of the 4th triode, the collector electrode of the 4th triode links to each other with the collector electrode of second triode and is the output of four-input terminal comparator.
According to an embodiment of four-input terminal comparator of the present invention, first triode and second triode measure-alike, the 3rd triode and the 4th triode measure-alike.
According to an embodiment of four-input terminal comparator of the present invention, this four-input terminal comparator also comprises:
The 5th triode, its base stage connects the collector electrode of the 4th triode, its grounded emitter, its collector electrode connects a current source and is the output of four-input terminal comparator, another termination supply voltage of current source.
According to an embodiment of four-input terminal comparator of the present invention, the emitter of first triode is connected with first resistance, and the emitter of second triode is connected with second resistance.
The present invention contrasts prior art has following beneficial effect: comparator of the present invention has first metal-oxide-semiconductor, second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor; Wherein the grid of first metal-oxide-semiconductor and second metal-oxide-semiconductor is connected first input voltage and second input voltage respectively, and the source electrode of first metal-oxide-semiconductor and second metal-oxide-semiconductor is connected the 3rd input voltage and the 4th input voltage respectively.The 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor constitute current-mirror structure, and the 3rd metal-oxide-semiconductor constitutes the diode connected mode, and the drain electrode of the 3rd metal-oxide-semiconductor is connected to the drain electrode of first metal-oxide-semiconductor, and the drain electrode of the 4th metal-oxide-semiconductor is connected to the drain electrode of second metal-oxide-semiconductor and is the output of comparator.The contrast prior art; In above-mentioned multiple batteries scheme; The present invention can directly compare the cell voltage of each string and the same reference voltage under the low pressure, therefore only needs a reference voltage source circuit, has saved a plurality of a reference sources; Thereby saved chip cost, improved the performance of circuit.
Description of drawings
Fig. 1 is the sketch map of traditional comparator internal circuit.
Fig. 2 is the sketch map of traditional two input terminal comparators.
Fig. 3 adopts traditional comparator to realize the sketch map of voltage of batteries detection mode.
Fig. 4 is the circuit diagram of first embodiment of four-input terminal comparator of the present invention.
Fig. 5 is the circuit diagram of second embodiment of four-input terminal comparator of the present invention.
Fig. 6 is the sketch map of four-input terminal comparator of the present invention.
Fig. 7 is the circuit diagram of the 3rd embodiment of four-input terminal comparator of the present invention.
Fig. 8 adopts the present invention to realize the sketch map of voltage of batteries detection mode.
Fig. 9 is the sketch map that each level changes in Fig. 7 comparator toggles process.
Figure 10 is the circuit diagram of the 4th embodiment of four-input terminal comparator of the present invention.
Figure 11 is the circuit diagram of the 5th embodiment of four-input terminal comparator of the present invention.
Figure 12 is the circuit diagram of the 6th embodiment of four-input terminal comparator of the present invention.
Figure 13 is the circuit diagram of the 7th embodiment of four-input terminal comparator of the present invention.
Figure 14 is the circuit diagram of the 8th embodiment of four-input terminal comparator of the present invention.
Figure 15 is the circuit diagram of the 9th embodiment of four-input terminal comparator of the present invention.
Figure 16 is the circuit diagram of the tenth embodiment of four-input terminal comparator of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further description.
First embodiment of four-input terminal comparator
Fig. 4 shows the circuit of first embodiment of four-input terminal comparator of the present invention.See also Fig. 4, the four-input terminal comparator of present embodiment comprises: the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4.
The grid of the first metal-oxide-semiconductor M1 connects the first input voltage V
In, the grid of the second metal-oxide-semiconductor M2 connects the second input voltage V
Ip, the source electrode of the first metal-oxide-semiconductor M1 connects the 3rd input voltage V1, and the source electrode of the second metal-oxide-semiconductor M2 connects the 4th input voltage V2.
The 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 constitute the connected mode of current mirror.Particularly; The grid of the 3rd metal-oxide-semiconductor M3 (is labeled as grid and drain electrode with N1 line M3 with the drain electrode short circuit in Fig. 4; Thereby constitute the diode connected mode), the source electrode of the 3rd metal-oxide-semiconductor M3 connects supply voltage VDD, and the drain electrode of the 3rd metal-oxide-semiconductor M3 connects the drain electrode of the first metal-oxide-semiconductor M1.The grid of the 4th metal-oxide-semiconductor M4 links to each other with the grid of the 3rd metal-oxide-semiconductor M3; The source electrode of the 4th metal-oxide-semiconductor M4 connects supply voltage VDD; The drain electrode of the 4th metal-oxide-semiconductor M4 connects the drain electrode of the second metal-oxide-semiconductor M2, and the output of the drain electrode of the 4th metal-oxide-semiconductor M4 is exactly the output (mark is for being drawn the output of comparator by N2 in Fig. 4) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th metal-oxide-semiconductor M5 and a current source I
b, the grid of the 5th metal-oxide-semiconductor M5 connects the drain electrode (in Fig. 4, be shown and connect N2) of the 4th metal-oxide-semiconductor M4, and the source electrode of the 5th metal-oxide-semiconductor M5 connects supply voltage VDD.The drain electrode of the 5th metal-oxide-semiconductor M5 connects current source I
b, and drain electrode leads to the output of comparator, and (output of comparator is labeled as V in Fig. 4
Out), current source I
bOther end ground connection.
In a kind of preferred implementation, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2's is measure-alike, and the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4's is measure-alike.
The form of expression of this four-input terminal comparator is as shown in Figure 6, and it is except input voltage V
InAnd V
IpOutside, also having input voltage V1 and V2, this is the present invention's two inputs that traditional comparator increased relatively.This four-input terminal comparator is to V
In-V1 and V
IpV is worked as in the comparison of two voltage differences of-V2
In-V1=V
IpDuring-V2, the comparator output voltage V
OutUpset.
Second embodiment of four-input terminal comparator
Fig. 5 shows the circuit of second embodiment of four-input terminal comparator of the present invention.See also Fig. 5, the four-input terminal comparator of present embodiment comprises: the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3, the 4th metal-oxide-semiconductor M4 and two resistance R 1 and R2.
The grid of the first metal-oxide-semiconductor M1 connects the first input voltage V
In, the grid of the second metal-oxide-semiconductor M2 connects the second input voltage V
Ip, the source electrode of the first metal-oxide-semiconductor M1 connects the 3rd input voltage V1 through resistance R 1, and the source electrode of the second metal-oxide-semiconductor M2 connects the 4th input voltage V2 through resistance R 2.
The 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 constitute the connected mode of current mirror.Particularly; The grid of the 3rd metal-oxide-semiconductor M3 (is labeled as grid and drain electrode with N1 line M3 with the drain electrode short circuit in Fig. 5; Thereby constitute the diode connected mode), the source electrode of the 3rd metal-oxide-semiconductor M3 connects supply voltage VDD, and the drain electrode of the 3rd metal-oxide-semiconductor M3 connects the drain electrode of the first metal-oxide-semiconductor M1.The grid of the 4th metal-oxide-semiconductor M4 links to each other with the grid of the 3rd metal-oxide-semiconductor M3; The source electrode of the 4th metal-oxide-semiconductor M4 connects supply voltage VDD; The drain electrode of the 4th metal-oxide-semiconductor M4 connects the drain electrode of the second metal-oxide-semiconductor M2, and the output of the drain electrode of the 4th metal-oxide-semiconductor M4 is exactly the output (mark is for being drawn the output of comparator by N2 in Fig. 5) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th metal-oxide-semiconductor M5 and a current source I
b, the grid of the 5th metal-oxide-semiconductor M5 connects the drain electrode (in Fig. 5, be shown and connect N2) of the 4th metal-oxide-semiconductor M4, and the source electrode of the 5th metal-oxide-semiconductor M5 connects supply voltage VDD.The drain electrode of the 5th metal-oxide-semiconductor M5 connects current source I
b, and drain electrode leads to the output of comparator, and (output of comparator is labeled as V in Fig. 5
Out), current source I
bOther end ground connection.
In a kind of preferred implementation, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2's is measure-alike, and the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4's is measure-alike.
In a kind of preferred implementation, the resistance of resistance R 1 and R2 is identical.
The form of expression of this four-input terminal comparator is as shown in Figure 6, and it is except input voltage V
InAnd V
IpOutside, also having input voltage V1 and V2, this is the present invention's two inputs that traditional comparator increased relatively.This four-input terminal comparator is to V
In-V1 and V
IpV is worked as in the comparison of two voltage differences of-V2
In-V1=V
IpDuring-V2, the comparator output voltage V
OutUpset.
The 3rd embodiment of four-input terminal comparator
Fig. 7 shows the circuit of the 3rd embodiment of four-input terminal comparator of the present invention.See also Fig. 7, the four-input terminal comparator of present embodiment comprises: the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4.
The grid of the first metal-oxide-semiconductor M1 connects the first input voltage V
In, the grid of the second metal-oxide-semiconductor M2 connects the second input voltage V
Ip, the source ground (V of the first metal-oxide-semiconductor M1
Gnd), the source electrode of the second metal-oxide-semiconductor M2 connects the 4th input voltage V2.
The 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 constitute the connected mode of current mirror.Particularly; The grid of the 3rd metal-oxide-semiconductor M3 (is labeled as grid and drain electrode with N1 line M3 with the drain electrode short circuit in Fig. 7; Thereby constitute the diode connected mode), the source electrode of the 3rd metal-oxide-semiconductor M3 connects supply voltage VDD, and the drain electrode of the 3rd metal-oxide-semiconductor M3 connects the drain electrode of the first metal-oxide-semiconductor M1.The grid of the 4th metal-oxide-semiconductor M4 links to each other with the grid of the 3rd metal-oxide-semiconductor M3; The source electrode of the 4th metal-oxide-semiconductor M4 connects supply voltage VDD; The drain electrode of the 4th metal-oxide-semiconductor M4 connects the drain electrode of the second metal-oxide-semiconductor M2, and the output of the drain electrode of the 4th metal-oxide-semiconductor M4 is exactly the output (mark is for being drawn the output of comparator by N2 in Fig. 7) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th metal-oxide-semiconductor M5 and a current source I
b, the grid of the 5th metal-oxide-semiconductor M5 connects the drain electrode (in Fig. 7, be shown and connect N2) of the 4th metal-oxide-semiconductor M4, and the source electrode of the 5th metal-oxide-semiconductor M5 connects supply voltage VDD.The drain electrode of the 5th metal-oxide-semiconductor M5 connects current source I
b, and drain electrode leads to the output of comparator, and (output of comparator is labeled as V in Fig. 7
Out), current source I
bOther end ground connection.
In a kind of preferred implementation, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2's is measure-alike, and the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4's is measure-alike.
Compare with first embodiment of Fig. 4, the unique difference of present embodiment is source ground rather than the 3rd input voltage V1 that connects shown in Figure 4 of the first metal-oxide-semiconductor M1.In practical application, can the grid of the first metal-oxide-semiconductor M1 be connected reference voltage V
Ref
So V among first embodiment
In-V1=V
IpThe equality of-V2 just can be reduced to V
Ref=V
Ip-V2, as long as therefore a stable V2 voltage is provided, just can be with high voltage V
IpWith low-voltage V
RefDirectly compare, as shown in Figure 7.
In circuit shown in Figure 7, work as V
Ip-V
2＞V
Ref-V
GndThe time, the electric current that the current ratio that flows through the first metal-oxide-semiconductor M1 flows through the second metal-oxide-semiconductor M2 is little, the electric current of the 4th metal-oxide-semiconductor M4 mirror image the 3rd metal-oxide-semiconductor M3; So the electric current of the current ratio second metal-oxide-semiconductor M2 of the 4th metal-oxide-semiconductor M4 is little; The voltage that N2 is ordered is by drop-down, the 5th metal-oxide-semiconductor M5 heavily conducting, V
OutOutput high level VDD.
Work as V
Ip-V
2=V
Ref-V
GndThe time; The electric current that flows through the first metal-oxide-semiconductor M1 equals to flow through the electric current of the second metal-oxide-semiconductor M2, and the electric current of the 4th metal-oxide-semiconductor M4 mirror image the 3rd metal-oxide-semiconductor M3 is so the electric current of the 4th metal-oxide-semiconductor M4 equals the electric current of the second metal-oxide-semiconductor M2; The N2 point voltage state that mediates, the 5th metal-oxide-semiconductor M5 electric current equals I
b, V
OutBeginning is by the past low level V of high level VDD
GndChange.
Work as V
Ip-V
2＜V
Ref-V
GndThe time, the electric current that flows through the first metal-oxide-semiconductor M1 is greater than the electric current that flows through the second metal-oxide-semiconductor M2, the electric current of the 4th metal-oxide-semiconductor M4 mirror image the 3rd metal-oxide-semiconductor M3; So the electric current of the 4th metal-oxide-semiconductor M4 is greater than the electric current of the second metal-oxide-semiconductor M2; The voltage that N2 is ordered is drawn high VDD, and the 5th metal-oxide-semiconductor M5 closes V
OutOutput low level V
Gnd
The variation of each level is as shown in Figure 9 in the comparator toggles process.
Present embodiment is further extended the detection that can realize voltage of batteries.In Fig. 8, VC1～VC4 represents the positive input terminal of four batteries respectively, and Vd1～Vd4 represents four batteries dividing potential drop separately, V respectively
RefRepresent reference voltage, comparator toggles when satisfying following relational expression:
V
ref-V
gnd＝V
d4-V
gnd＝V
d3-V
c4＝V
d2-V
c3＝V
d1-V
c2
Compare the implementation method of traditional comparator; The present invention can directly compare the cell voltage of each string and the same reference voltage under the low pressure, so only need a reference voltage source circuit, has saved a plurality of a reference sources; Thereby saved chip cost, improved circuit performance.
The 4th embodiment of four-input terminal comparator
Figure 10 shows the circuit of the 4th embodiment of four-input terminal comparator of the present invention.See also Figure 10, the four-input terminal comparator of present embodiment comprises: the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3, the 4th metal-oxide-semiconductor M4 and resistance R 1 and R2.
The grid of the first metal-oxide-semiconductor M1 connects the first input voltage V
In(in practical application, can make the grid of the first metal-oxide-semiconductor M1 connect reference voltage V
Ref), the grid of the second metal-oxide-semiconductor M2 connects the second input voltage V
Ip, the source electrode of the first metal-oxide-semiconductor M1 is through resistance R 1 ground connection (V
Gnd), the source electrode of the second metal-oxide-semiconductor M2 connects the 4th input voltage V2 through resistance R 2.
The 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 constitute the connected mode of current mirror.Particularly; The grid of the 3rd metal-oxide-semiconductor M3 (is labeled as grid and drain electrode with N1 line M3 with the drain electrode short circuit in Figure 10; Thereby constitute the diode connected mode), the source electrode of the 3rd metal-oxide-semiconductor M3 connects supply voltage VDD, and the drain electrode of the 3rd metal-oxide-semiconductor M3 connects the drain electrode of the first metal-oxide-semiconductor M1.The grid of the 4th metal-oxide-semiconductor M4 links to each other with the grid of the 3rd metal-oxide-semiconductor M3; The source electrode of the 4th metal-oxide-semiconductor M4 connects supply voltage VDD; The drain electrode of the 4th metal-oxide-semiconductor M4 connects the drain electrode of the second metal-oxide-semiconductor M2, and the output of the drain electrode of the 4th metal-oxide-semiconductor M4 is exactly the output (mark is for being drawn the output of comparator by N2 in Figure 10) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th metal-oxide-semiconductor M5 and a current source I
b, the grid of the 5th metal-oxide-semiconductor M5 connects the drain electrode (in Figure 10, be shown and connect N2) of the 4th metal-oxide-semiconductor M4, and the source electrode of the 5th metal-oxide-semiconductor M5 connects supply voltage VDD.The drain electrode of the 5th metal-oxide-semiconductor M5 connects current source I
b, and drain electrode leads to the output of comparator, and (output of comparator is labeled as V in Figure 10
Out), current source I
bOther end ground connection.
In a kind of preferred implementation, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2's is measure-alike, and the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4's is measure-alike.
In a kind of preferred implementation, the resistance of resistance R 1 and R2 is identical.
The 5th embodiment of four-input terminal comparator
Figure 11 shows the circuit of the 5th embodiment of four-input terminal comparator of the present invention.See also Figure 11; The four-input terminal comparator of present embodiment is with respect to the four-input terminal comparator of previous embodiment; Its input is the PMOS pipe to pipe (the just first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2), and load is the NMOS pipe to pipe (just the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4).
The four-input terminal comparator of present embodiment comprises: the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3, the 4th metal-oxide-semiconductor M4, resistance R 1 and R2.
The grid of the first metal-oxide-semiconductor M1 connects the first input voltage V
In, the grid of the second metal-oxide-semiconductor M2 connects the second input voltage V
Ip, the source electrode of the first metal-oxide-semiconductor M1 connects the 3rd input voltage V1 through resistance R 1, and the source electrode of the second metal-oxide-semiconductor M2 connects the 4th input voltage V2 through resistance R 2.
The 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 constitute the connected mode of current mirror.Particularly, the grid of the 3rd metal-oxide-semiconductor M3 and drain electrode short circuit (in Figure 11, be labeled as grid and drain electrode, thereby constitute the diode connected mode), the source ground (V of the 3rd metal-oxide-semiconductor M3 with N1 line M3
Gnd), the drain electrode of the 3rd metal-oxide-semiconductor M3 connects the drain electrode of the first metal-oxide-semiconductor M1.The grid of the 4th metal-oxide-semiconductor M4 links to each other with the grid of the 3rd metal-oxide-semiconductor M3, the source ground (V of the 4th metal-oxide-semiconductor M4
Gnd), the drain electrode of the 4th metal-oxide-semiconductor M4 connects the drain electrode of the second metal-oxide-semiconductor M2, and the output of the drain electrode of the 4th metal-oxide-semiconductor M4 is exactly the output (mark is for being drawn the output of comparator by N2 in Figure 11) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th metal-oxide-semiconductor M5 and a current source I
b, the grid of the 5th metal-oxide-semiconductor M5 connects the drain electrode (in Figure 11, be shown and connect N2) of the 4th metal-oxide-semiconductor M4, the source ground of the 5th metal-oxide-semiconductor M5.The drain electrode of the 5th metal-oxide-semiconductor M5 connects current source I
b, and drain electrode leads to the output of comparator, and (output of comparator is labeled as V in Figure 11
Out), current source I
bAnother termination supply voltage VDD.
In a kind of preferred implementation, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2's is measure-alike, and the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4's is measure-alike.
In a kind of preferred implementation, the resistance of resistance R 1 and R2 is identical.
The 6th embodiment of four-input terminal comparator
Figure 12 shows the 6th embodiment of four-input terminal comparator of the present invention.See also Figure 12, the four-input terminal comparator of present embodiment is the same with the 5th embodiment, and its input is the PMOS pipe to pipe (the just first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2), and load is the NMOS pipe to pipe (just the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4).
The four-input terminal comparator of present embodiment comprises: the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3, the 4th metal-oxide-semiconductor M4.
The grid of the first metal-oxide-semiconductor M1 connects the first input voltage V
In, the grid of the second metal-oxide-semiconductor M2 connects the second input voltage V
Ip(in practical application, make the second input voltage V
IpBe reference voltage V
Ref), the source electrode of the first metal-oxide-semiconductor M1 connects the 3rd input voltage V1, and the source electrode of the second metal-oxide-semiconductor M2 connects the 4th input voltage V2.
The 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 constitute the connected mode of current mirror.Particularly, the grid of the 3rd metal-oxide-semiconductor M3 and drain electrode short circuit (in Figure 12, be labeled as grid and drain electrode, thereby constitute the diode connected mode), the source ground (V of the 3rd metal-oxide-semiconductor M3 with N1 line M3
Gnd), the drain electrode of the 3rd metal-oxide-semiconductor M3 connects the drain electrode of the first metal-oxide-semiconductor M1.The grid of the 4th metal-oxide-semiconductor M4 links to each other with the grid of the 3rd metal-oxide-semiconductor M3, the source ground (V of the 4th metal-oxide-semiconductor M4
Gnd), the drain electrode of the 4th metal-oxide-semiconductor M4 connects the drain electrode of the second metal-oxide-semiconductor M2, and the output of the drain electrode of the 4th metal-oxide-semiconductor M4 is exactly the output (mark is for being drawn the output of comparator by N2 in Figure 12) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th metal-oxide-semiconductor M5 and a current source I
b, the grid of the 5th metal-oxide-semiconductor M5 connects the drain electrode (in Figure 12, be shown and connect N2) of the 4th metal-oxide-semiconductor M4, the source ground of the 5th metal-oxide-semiconductor M5.The drain electrode of the 5th metal-oxide-semiconductor M5 connects current source I
b, and drain electrode leads to the output of comparator, and (output of comparator is labeled as V in Figure 12
Out), current source I
bAnother termination power vd D.
In a kind of preferred implementation, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2's is measure-alike, and the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4's is measure-alike.
The 7th embodiment of four-input terminal comparator
Figure 13 shows the 7th embodiment of four-input terminal comparator of the present invention.See also Figure 13, present embodiment is with respect to the difference of previous embodiment, has replaced original metal-oxide-semiconductor with BJT pipe (triode).
The four-input terminal comparator of present embodiment comprises: the first triode Q1, the second triode Q2, the 3rd triode Q3 and the 4th triode Q4.
The base stage of the first triode Q1 connects the first input voltage V
In, the base stage of the second triode Q2 connects the second input voltage V
Ip, the emitter of the first triode Q1 connects the 3rd input voltage V1, and the emitter of the second triode Q2 connects the 4th input voltage V2.
The 3rd triode pipe Q3 and the 4th triode Q4 constitute the connected mode of current mirror.Particularly; The base stage of the 3rd triode Q3 and collector electrode short circuit (are labeled as base stage and collector electrode with N1 line Q3 in Figure 13; Thereby constitute the diode connected mode); The emitter of the 3rd triode Q3 meets supply voltage VDD, and the collector electrode of the 3rd triode Q3 connects the collector electrode of the first triode Q1.The base stage of the 4th triode Q4 links to each other with the base stage of the 3rd triode Q3; The emitter of the 4th triode Q4 meets supply voltage VDD; The collector electrode of the 4th triode Q4 connects the collector electrode of the second triode Q2, and the output of the collector electrode of the 4th triode Q4 is exactly the output (mark is for being drawn the output of comparator by N2 in Figure 13) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th triode Q5 and a current source I
b, the base stage of the 5th triode Q5 connects the collector electrode (in Figure 13, be shown and connect N2) of the 4th triode Q4, and the emitter of the 5th triode Q5 meets supply voltage VDD.The collector electrode of the 5th triode Q5 connects current source I
b, and collector electrode leads to the output of comparator, and (output of comparator is labeled as V in Figure 13
Out), current source I
bOther end ground connection.
In a kind of preferred implementation, the first triode Q1 and the second triode Q2's is measure-alike, and the 3rd triode Q3 and the 4th triode Q4's is measure-alike.
The 8th embodiment of four-input terminal comparator
Figure 14 shows the 8th embodiment of four-input terminal comparator of the present invention.See also Figure 14, the same with the embodiment of Figure 13, present embodiment has been replaced original metal-oxide-semiconductor with BJT pipe (triode).
The four-input terminal comparator of present embodiment comprises: the first triode Q1, the second triode Q2, the 3rd triode Q3, the 4th triode Q4, resistance R 1 and R2.
The base stage of the first triode Q1 connects the first input voltage V
In, the base stage of the second triode Q2 connects the second input voltage V
Ip, the emitter of the first triode Q1 connects the 3rd input voltage V1 through resistance R 1, and the emitter of the second triode Q2 connects the 4th input voltage V2 through resistance R 2.
The 3rd triode pipe Q3 and the 4th triode Q4 constitute the connected mode of current mirror.Particularly; The base stage of the 3rd triode Q3 and collector electrode short circuit (are labeled as base stage and collector electrode with N1 line Q3 in Figure 14; Thereby constitute the diode connected mode); The emitter of the 3rd triode Q3 meets supply voltage VDD, and the collector electrode of the 3rd triode Q3 connects the collector electrode of the first triode Q1.The base stage of the 4th triode Q4 links to each other with the base stage of the 3rd triode Q3; The emitter of the 4th triode Q4 meets supply voltage VDD; The collector electrode of the 4th triode Q4 connects the collector electrode of the second triode Q2, and the output of the collector electrode of the 4th triode Q4 is exactly the output (mark is for being drawn the output of comparator by N2 in Figure 14) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th triode Q5 and a current source I
b, the base stage of the 5th triode Q5 connects the collector electrode (in Figure 14, be shown and connect N2) of the 4th triode Q4, and the emitter of the 5th triode Q5 meets supply voltage VDD.The collector electrode of the 5th triode Q5 connects current source I
b, and collector electrode leads to the output of comparator, and (output of comparator is labeled as V in Figure 14
Out), current source I
bOther end ground connection.
In a kind of preferred implementation, the first triode Q1 and the second triode Q2's is measure-alike, and the 3rd triode Q3 and the 4th triode Q4's is measure-alike.
In a kind of preferred implementation, the resistance of resistance R 1 and R2 is identical.
The 9th embodiment of four-input terminal comparator
Figure 15 shows the 9th embodiment of four-input terminal comparator of the present invention.See also Figure 15, the four-input terminal comparator of present embodiment comprises: the first triode Q1, the second triode Q2, the 3rd triode Q3 and the 4th triode Q4.
The base stage of the first triode Q1 connects the first input voltage V
In, the base stage of the second triode Q2 connects the second input voltage V
Ip(can make in practical application that second input voltage is a reference voltage V
Ref), the emitter of the first triode Q1 connects the 3rd input voltage V1, and the emitter of the second triode Q2 connects the 4th input voltage V2.
The 3rd triode pipe Q3 and the 4th triode Q4 constitute the connected mode of current mirror.Particularly, the base stage of the 3rd triode Q3 and collector electrode short circuit (in Figure 15, be labeled as base stage and collector electrode, thereby constitute the diode connected mode), the grounded emitter (V of the 3rd triode Q3 with N1 line Q3
Gnd), the collector electrode of the 3rd triode Q3 connects the collector electrode of the first triode Q1.The base stage of the 4th triode Q4 links to each other with the base stage of the 3rd triode Q3; The grounded emitter of the 4th triode Q4; The collector electrode of the 4th triode Q4 connects the collector electrode of the second triode Q2, and the output of the collector electrode of the 4th triode Q4 is exactly the output (mark is for being drawn the output of comparator by N2 in Figure 15) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th triode Q5 and a current source I
b, the base stage of the 5th triode Q5 connects the collector electrode (in Figure 15, be shown and connect N2) of the 4th triode Q4, the grounded emitter of the 5th triode Q5.The collector electrode of the 5th triode Q5 connects current source I
b, and collector electrode leads to the output of comparator, and (output of comparator is labeled as V in Figure 15
Out), current source I
bAnother termination supply voltage VDD.
In a kind of preferred implementation, the first triode Q1 and the second triode Q2's is measure-alike, and the 3rd triode Q3 and the 4th triode Q4's is measure-alike.
The tenth embodiment of four-input terminal comparator
Figure 16 shows the tenth embodiment of four-input terminal comparator of the present invention.See also Figure 16, the four-input terminal comparator of present embodiment comprises: the first triode Q1, the second triode Q2, the 3rd triode Q3, the 4th triode Q4, resistance R 1 and R2.
The base stage of the first triode Q1 connects the first input voltage V
In, the base stage of the second triode Q2 connects the second input voltage V
Ip(in practical application, can make the second input voltage V
IpBe reference voltage V
Ref), the emitter of the first triode Q1 connects the 3rd input voltage V1 through resistance R 1, and the emitter of the second triode Q2 connects the 4th input voltage V2 through resistance R 2.
The 3rd triode pipe Q3 and the 4th triode Q4 constitute the connected mode of current mirror.Particularly, the base stage of the 3rd triode Q3 and collector electrode short circuit (in Figure 16, be labeled as base stage and collector electrode, thereby constitute the diode connected mode), the grounded emitter (V of the 3rd triode Q3 with N1 line Q3
Gnd), the collector electrode of the 3rd triode Q3 connects the collector electrode of the first triode Q1.The base stage of the 4th triode Q4 links to each other with the base stage of the 3rd triode Q3; The grounded emitter of the 4th triode Q4; The collector electrode of the 4th triode Q4 connects the collector electrode of the second triode Q2, and the output of the collector electrode of the 4th triode Q4 is exactly the output (mark is for being drawn the output of comparator by N2 in Figure 16) of comparator.
For four-input terminal comparator, above circuit can constitute a four-input terminal comparator the most basic.In order better to realize its effect on the basis of foregoing circuit, can also increasing by one the 5th triode Q5 and a current source I
b, the base stage of the 5th triode Q5 connects the collector electrode (in Figure 16, be shown and connect N2) of the 4th triode Q4, the grounded emitter of the 5th triode Q5.The collector electrode of the 5th triode Q5 connects current source I
b, and collector electrode leads to the output of comparator, and (output of comparator is labeled as V in Figure 16
Out), current source I
bAnother termination supply voltage VDD.
In a kind of preferred implementation, the first triode Q1 and the second triode Q2's is measure-alike, and the 3rd triode Q3 and the 4th triode Q4's is measure-alike.
In a kind of preferred implementation, the resistance of resistance R 1 and R2 is identical.
Comprehensive the above embodiments can find out that two inputs of four-input terminal comparator of the present invention are with respect to different potential, when the relative current potential of the voltage that detects when needs changes, and corresponding reference voltage V
RefNeed not to change.In described multi-section lithium ion battery applications scheme etc. similarly in the application scenario like background technology; Compare the implementation method of traditional comparator; The present invention can directly compare the cell voltage of each string and the same reference voltage under the low pressure, so only need a reference voltage source circuit, has saved a plurality of a reference sources; Thereby saved chip cost, improved the performance of circuit.
The foregoing description provides to those of ordinary skills and realizes or use of the present invention; Those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; The foregoing description is made various modifications or variation; Thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (14)
1. four-input terminal comparator comprises:
First metal-oxide-semiconductor and second metal-oxide-semiconductor, wherein the grid of first metal-oxide-semiconductor connects first input voltage, and the grid of second metal-oxide-semiconductor connects second input voltage;
The 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor; Wherein the grid of the 3rd metal-oxide-semiconductor with the drain electrode short circuit; The source electrode of the 3rd metal-oxide-semiconductor connects supply voltage, and the drain electrode of the 3rd metal-oxide-semiconductor connects the drain electrode of first metal-oxide-semiconductor, and the grid of the 4th metal-oxide-semiconductor links to each other with the grid of the 3rd metal-oxide-semiconductor; The source electrode of the 4th metal-oxide-semiconductor connects supply voltage, and the drain electrode of the 4th metal-oxide-semiconductor connects the drain electrode of second metal-oxide-semiconductor and is the output of four-input terminal comparator;
The source electrode of first metal-oxide-semiconductor is connected with first resistance, and the source electrode of second metal-oxide-semiconductor is connected with second resistance, and the other end of first resistance connects the 3rd input voltage, and the other end of second resistance connects the 4th input voltage.
2. four-input terminal comparator according to claim 1 is characterized in that, first metal-oxide-semiconductor and second metal-oxide-semiconductor measure-alike, the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor measure-alike.
3. four-input terminal comparator according to claim 1 is characterized in that, this four-input terminal comparator also comprises:
The 5th metal-oxide-semiconductor, its grid connects the drain electrode of the 4th metal-oxide-semiconductor, and its source electrode connects supply voltage, and its drain electrode connects a current source and is the output of four-input terminal comparator, the other end ground connection of current source.
4. four-input terminal comparator according to claim 1 is characterized in that the 3rd input voltage is a ground voltage.
5. four-input terminal comparator comprises:
First metal-oxide-semiconductor and second metal-oxide-semiconductor, wherein the grid of first metal-oxide-semiconductor connects first input voltage, and the grid of second metal-oxide-semiconductor connects second input voltage;
The 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor; The drain and gate short circuit of the 3rd metal-oxide-semiconductor wherein; The source ground of the 3rd metal-oxide-semiconductor, the drain electrode of the 3rd metal-oxide-semiconductor connects the drain electrode of first metal-oxide-semiconductor, and the grid of the 4th metal-oxide-semiconductor links to each other with the grid of the 3rd metal-oxide-semiconductor; The source ground of the 4th metal-oxide-semiconductor, the drain electrode of the 4th metal-oxide-semiconductor connect the drain electrode of second metal-oxide-semiconductor and are the output of four-input terminal comparator;
The source electrode of first metal-oxide-semiconductor is connected with first resistance, and the source electrode of second metal-oxide-semiconductor is connected with second resistance, and the other end of first resistance connects the 3rd input voltage, and the other end of second resistance connects the 4th input voltage.
6. four-input terminal comparator according to claim 5 is characterized in that, first metal-oxide-semiconductor and second metal-oxide-semiconductor measure-alike, the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor measure-alike.
7. four-input terminal comparator according to claim 5 is characterized in that, this four-input terminal comparator also comprises:
The 5th metal-oxide-semiconductor, its grid connects the drain electrode of the 4th metal-oxide-semiconductor, its source ground, its drain electrode connects a current source and is the output of four-input terminal comparator, another termination supply voltage of current source.
8. four-input terminal comparator according to claim 5 is characterized in that the grid of second metal-oxide-semiconductor connects a reference voltage.
9. four-input terminal comparator comprises:
First triode and second triode, wherein the base stage of first triode connects first input voltage, and the base stage of second triode connects second input voltage;
The 3rd triode and the 4th triode; The wherein base stage of the 3rd triode and collector electrode short circuit; The emitter of the 3rd triode connects supply voltage, and the collector electrode of the 3rd triode connects the collector electrode of first triode, and the base stage of the 4th triode links to each other with the base stage of the 3rd triode; The emitter of the 4th triode connects supply voltage, and the collector electrode of the collector electrode of the 4th triode and second triode links to each other and is the output of four-input terminal comparator;
The emitter of first triode is connected with first resistance, and the emitter of second triode is connected with second resistance, and the other end of first resistance connects the 3rd input voltage, and the other end of second resistance connects the 4th input voltage.
10. four-input terminal comparator according to claim 9 is characterized in that, first triode and second triode measure-alike, the 3rd triode and the 4th triode measure-alike.
11. four-input terminal comparator according to claim 9 is characterized in that, this four-input terminal comparator also comprises:
The 5th triode, its base stage connects the collector electrode of the 4th triode, and its emitter connects supply voltage, and its collector electrode connects a current source and is the output of four-input terminal comparator, the other end ground connection of current source.
12. a four-input terminal comparator comprises:
First triode and second triode, wherein the base stage of first triode connects first input voltage, and the base stage of second triode connects second input voltage;
The 3rd triode and the 4th triode; The wherein collector electrode of the 3rd triode and base stage short circuit; The collector electrode of the 3rd triode connects the collector electrode of first triode, the grounded emitter of the 3rd triode, and the base stage of the 4th triode links to each other with the base stage of the 3rd triode; The grounded emitter of the 4th triode, the collector electrode of the 4th triode links to each other with the collector electrode of second triode and is the output of four-input terminal comparator;
The emitter of first triode is connected with first resistance, and the emitter of second triode is connected with second resistance, and the other end of first resistance connects the 3rd input voltage, and the other end of second resistance connects the 4th input voltage.
13. four-input terminal comparator according to claim 12 is characterized in that, first triode and second triode measure-alike, the 3rd triode and the 4th triode measure-alike.
14. four-input terminal comparator according to claim 12 is characterized in that, this four-input terminal comparator also comprises:
The 5th triode, its base stage connects the collector electrode of the 4th triode, its grounded emitter, its collector electrode connects a current source and is the output of four-input terminal comparator, another termination supply voltage of current source.
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| CN103105885B (en) * | 2012-12-28 | 2014-09-17 | 中颖电子股份有限公司 | Circuit producing reference voltage of high voltage |
| CN110311562A (en) * | 2019-07-26 | 2019-10-08 | 佛山中科芯蔚科技有限公司 | A kind of DC-DC converter |
| CN114689934B (en) * | 2022-06-01 | 2022-09-30 | 苏州贝克微电子股份有限公司 | Modular voltage detection circuit |
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| JPH11202004A (en) * | 1998-01-16 | 1999-07-30 | Toyota Autom Loom Works Ltd | Comparator |
| US7920436B2 (en) * | 2008-12-17 | 2011-04-05 | Atmel Corporation | Sense amplifier |
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| US6316978B1 (en) * | 2000-05-03 | 2001-11-13 | National Semiconductor Corporation | Comparator with process and temperature insensitive hysteresis and threshold potentials |
| CN1777026A (en) * | 2004-11-17 | 2006-05-24 | 恩益禧电子股份有限公司 | Voltage comparator circuit with symmetric circuit topology |
| CN1758540A (en) * | 2005-02-23 | 2006-04-12 | 威盛电子股份有限公司 | Comparator with output offset correction and mos logical circuit |
| CN101192827A (en) * | 2007-12-05 | 2008-06-04 | 来新泉 | A comparator with multiple logic function |
| CN101557216A (en) * | 2009-03-05 | 2009-10-14 | 深圳市民展科技开发有限公司 | Comparator and D-class audio power amplifier comprising comparator |
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