CN104079270A - Electronic device and comparator thereof - Google Patents
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- CN104079270A CN104079270A CN201410312025.5A CN201410312025A CN104079270A CN 104079270 A CN104079270 A CN 104079270A CN 201410312025 A CN201410312025 A CN 201410312025A CN 104079270 A CN104079270 A CN 104079270A
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Abstract
The invention discloses an electronic device and a comparator thereof. The sampling unit selectively samples the first input signal and the second input signal and generates a difference signal. The amplifying unit receives the difference signal and generates an output signal, wherein the amplifying unit is driven by a first preset voltage, a second preset voltage, a first system supply voltage and a second system supply voltage. The first preset voltage is used for setting an operating point of the amplifying unit, and the second preset voltage is greater than the first system supply voltage.
Description
Technical field
The invention relates to a kind of electronic installation, and relate to especially a kind of comparator.
Background technology
Comparator is often used in various sensing application, sensing circuit of for example contact panel etc.Comparator is in order to compare input signal and reference voltage, to produce comparative result.
Common comparator is realized mainly with modes such as CMOS (Complementary Metal Oxide Semiconductor) (CMOS) at present.But, utilize the framework of the comparator of CMOS realization conventionally can use P transistor npn npn and N-type transistor, therefore need to use more loaded down with trivial details fabrication schedule, and cost is increased.In addition,, if variation appears in the fabrication schedule of CMOS, may make the operation failure of comparator or produce wrong comparative result.
Therefore, how can effectively reduce manufacturing cost and the operation reliability of comparator, real one of the current important research and development problem that belongs to, also becomes current association area and needs improved target badly.
Summary of the invention
One aspect of content of the present invention lies in provides a kind of electronic installation.Electronic installation comprises sampling unit and amplifying unit.Sampling unit is in order to optionally the first input signal and the second input signal are sampled, and produces difference signal.Amplifying unit is in order to receive difference signal and to produce output signal, and wherein amplifying unit drives via the first predeterminated voltage, the second predeterminated voltage, the first system supply voltage and second system supply voltage.The first predeterminated voltage is in order to the operating point of amplifying unit to be set, and the second predeterminated voltage is greater than the first system supply voltage.
In sum, the disclosed electronic installation of content of the present invention can be by multiple voltage set-up mode lifting operation reliability effectively under process variation.
Brief description of the drawings
For above and other object of the present invention, feature, advantage and embodiment can be become apparent, the description of the drawings is as follows:
Figure 1A is the schematic diagram that an embodiment of the content according to the present invention illustrates comparator;
Figure 1B is the time sequential routine figure that an embodiment of the content according to the present invention illustrates the comparator in Figure 1A;
Fig. 2 is the schematic diagram that an embodiment of the content according to the present invention illustrates a kind of amplifying unit;
Fig. 3 A is the schematic diagram that an embodiment of the content according to the present invention illustrates a kind of amplifying unit;
Fig. 3 B is an embodiment of the content according to the present invention voltage gain of amplifying unit before predeterminated voltage is adjusted that illustrate Fig. 3 A and the graph of relation of difference signal;
Fig. 3 C is an embodiment of the content according to the present invention voltage gain Q of amplifying unit after predeterminated voltage is adjusted that illustrate Fig. 3 A and the graph of relation of difference signal;
Fig. 4 is the schematic diagram that an embodiment of the content according to the present invention illustrates a kind of amplifying unit;
Fig. 5 is the application schematic diagram that an embodiment of the content according to the present invention illustrates a kind of light sensing system; And
Fig. 6 is the application schematic diagram that an embodiment of the content according to the present invention illustrates a kind of Hall sensing apparatus.
For content of the present invention can be become apparent, being described as follows of appended symbol:
100: comparator 140,200,300,400: amplifying unit
VIN1, VIN2: input signal VC1, VC2: control signal
VSIG: difference signal α: deviant
VINIT, VCC, VEE: predeterminated voltage 501,502: OPTICAL SENSORS
T1, T2, T3, T4, T5, T6, SW1, SW2, SW3: switch
VCC1, VINIT1, VEE1, VS1, VS3: voltage 120: sampling unit
142: amplifying circuit VOUT: output signal
Q: voltage gain A, B: node
VDD, VSS: system supply voltage light sensing apparatus: 500
Light shield: 503 Hall sensing apparatus: 600
Hall element: 601 C: electric capacity
IDS1, IDS2, IDS3, IDS4, IDS6, IF1, IF2: electric current
Embodiment
Below coordinate accompanying drawing to elaborate for embodiment, but the scope that the embodiment providing is not contained in order to limit the present invention, and the description of structure operation is non-in order to limit the order of its execution, any structure being reconfigured by element, the device with impartial effect that produces, is all the scope that the present invention is contained.In addition, accompanying drawing only for the purpose of description, is not mapped according to life size.For making to be convenient to understand, in following explanation, similar elements will illustrate with identical symbology.
In addition, about " coupling " used herein or " connection ", all can refer to two or multiple element mutually directly make entity or in electrical contact, or mutually indirectly put into effect body or in electrical contact, also can refer to two or multiple element mutual operation or action.
Please refer to Figure 1A, Figure 1A is the schematic diagram that an embodiment of the content according to the present invention illustrates comparator 100.As shown in Figure 1A, comparator 100 comprises sampling unit 120 and amplifying unit 140.Sampling unit 120 is in order to optionally input signal VIN1 and input signal VIN2 are sampled, and produces difference signal VSIG.Amplifying unit 140 electric property coupling sampling units 120, and in order to receive difference signal VSIG, to produce output signal VOUT.
In each embodiment of content of the present invention, amplifying unit 140 arranges to be driven via predeterminated voltage VINIT, predeterminated voltage VCC, system supply voltage VDD and system supply voltage VSS.Above-mentioned predeterminated voltage VINIT can be in order to arrange the operating point of amplifying unit 140, and wherein predeterminated voltage VCC arranges with higher than system supply voltage VDD, and system supply voltage VDD arranges with higher than system supply voltage VSS.By above-mentioned configuration mode, when the inner member of amplifying unit 140 is because of fabrication errors or long-term use while producing variation, can correspondingly predeterminated voltage VINIT be heightened or be turned down together with predeterminated voltage VCC, to reduce the impact of inner member variation.So, amplifying unit 140 operation reliabilities are improved.Associative operation herein will describe in detail in subsequent paragraph.
As shown in Figure 1A, in some embodiment, sampling unit 120 comprises switch SW 1, switch SW 2 and capacitor C.The first end of switch SW 1 is in order to receive input signal VIN1, and the control end of switch SW 1 is in order to reception control signal VC1.The first end of switch SW 2 is in order to receive input signal VIN2, and the control end of switch SW 2 is in order to reception control signal VC2, and wherein above-mentioned control signal VC1 and control signal VC2 are set to anti-phase.The first end (that is node A) of capacitor C is electrically coupled to the second end of switch SW 1 and the second end of switch SW 2.
Moreover amplifying unit 140 comprises switch SW 3 and amplifying circuit 142.Second end (that is Node B) of the first end electric property coupling capacitor C of switch SW 3, the second end of switch SW 3 is in order to receive predeterminated voltage VINIT, and the control end of switch SW 3 is in order to reception control signal VC1.Amplifying circuit 142 is electrically coupled to the first end (being Node B) of switch SW 3, and receives difference signal VSIG and predeterminated voltage VINIT according to the sequential of control signal VC1.For example, amplifying circuit 142 can receive predeterminated voltage VINIT in the time of switch SW 3 controlled signal VC1 conducting, and in the time that switch SW 3 controlled signal VC1 close, receive the signal after difference signal VSIG and predeterminated voltage VINIT superposition, and then produce output signal VOUT.
With function, switch SW 1, in order to according to optionally conducting of control signal VC1, stores so that input signal VIN1 is sent to capacitor C.Similarly, switch SW 2 can, according to optionally conducting of control signal VC2, be sent to capacitor C by input signal VIN2 and store.Capacitor C can be according to stored control signal VC1 and control signal VC2 and output difference value signal VSIG.Switch SW 3, according to optionally conducting of control signal VC1, predeterminated voltage VINIT is sent to the second end of capacitor C, is adjusted by this signal level of difference signal VSIG, and then the operating point of amplifying circuit 142 is set.
Figure 1B is the time sequential routine figure that an embodiment of the content according to the present invention illustrates the comparator 100 in Figure 1A.For convenience of description, please with reference to Figure 1A and Figure 1B.
In the time of time T 1, control signal VC1 switches to high-level voltage, switch SW 1 and therefore conducting of switch SW 3.Input signal VIN1 can be sent to capacitor C via switch SW 1, and makes the voltage level of node A switch to the position standard of input signal VIN1.Meanwhile, predeterminated voltage VINIT is sent to capacitor C via switch SW 3, and makes the voltage level of Node B switch to the position standard of predeterminated voltage VINIT.
In the time of time T 2, control signal VC1 switches to low level voltage, therefore switch SW 1 turn-offs with switch SW 3, and the voltage level of node A still maintains the voltage level of input signal VIN1, and the voltage level of Node B also maintains the voltage level of predeterminated voltage VINIT.
In the time of time T 3, control signal VC2 switches to high-level voltage, therefore conducting of switch SW 2.Input signal VIN2 can be sent to capacitor C via switch SW 2, and make the voltage level of node A by the accurate position standard that switches to input signal VIN2 in position of input signal VIN1, the variation of this potential difference is difference signal VSIG, that is difference signal VSIG=VIN2-VIN1.Simultaneously, due to the characteristic of capacitor C, in Node B, also can produce the variation of identical potential difference, therefore the voltage level of Node B has up promoted identical potential difference (that is be about difference signal VSIG amplitude) by the voltage level of predeterminated voltage VINIT.Therefore, amplifying circuit 142 can amplify this difference signal VSIG.If the voltage gain of amplifying circuit 142 is Q, exportable Q difference signal VSIG doubly, that is output signal VOUT=Q*VSIG.
As shown in Figure 1B, be greater than input signal VIN1, the exportable output signal VOUT with high-level voltage of comparator 100 if work as input signal VIN2.Otherwise, be less than input signal VIN1, the exportable output signal VOUT with low level voltage of comparator 100 if work as input signal VIN2.Therefore, can learn by the voltage level of output signal VOUT the comparative result of input signal VIN1 and input signal VIN2.
The following paragraph of content of the present invention will propose several embodiment, can be in order to realize function and the operation described in above-mentioned amplifying unit 140, but content of the present invention the not only embodiment of following row are limited.
Please refer to Fig. 2, Fig. 2 is the schematic diagram that an embodiment of the content according to the present invention illustrates a kind of amplifying unit 200.As shown in Figure 2, the amplifying circuit 142 in amplifying unit 200 comprises switch T1 and switch T2.The first end of switch T1 is in order to receiving system supply voltage VDD, and the second end of switch T1 is in order to produce output signal VOUT, and the control end of switch T1 is in order to receive predeterminated voltage VCC.The second end of the first end electric property coupling switch T1 of switch T2, and the second end of switch T2 is in order to receiving system supply voltage VSS, be all the second end of electric property coupling switch T1 and first ends of switch T2 of output signal VOUT, and the control end of switch T2 is in order to receive difference signal VSIG.
In implementation, aforesaid switch T1 and switch T2 have critical voltage (thresholdvoltage) VTH separately.Under normal running, predeterminated voltage VCC can be set to be greater than the voltage VCC1 of system supply voltage VDD and critical voltage VTH sum, that is VCC=VCC1>VDD+VTH, and predeterminated voltage VINIT is set to voltage VINIT1.As shown in Figure 2, predeterminated voltage VINT puts on the control end of switch T2, and the operating point of amplifying circuit 142 is set by this.Therefore, the value of voltage VINIT1 is adjusted in visual actual demand, so that amplifying circuit 142 is operated in to suitable operating condition.When processing procedure produces variation or component ageing, and the critical voltage VTH of switch T1 and switch T2 is produced while variation, can be by adjusting predeterminated voltage VINIT and predeterminated voltage VCC, to improve the reliability of amplifying unit 140.
For example, comparator 100 can be applicable in the sensing circuit of contact panel.In the time of normal running, via above-mentioned voltage setting, switch T2 operates in saturation region, and switch T1 operates in linear zone, therefore the electric current I DS1 of the electric current I DS2 of switch T2 and switch T1 can be expressed as following formula (1) and formula (2), and wherein β is the process parameter of switch T1 and switch T2:
IDS2＝(β/2)×[(VINT1+VSIG-VSS)-VTH]
2…(1)
IDS1＝(β/2)×[(VCC1-VOUT)-VTH-1/2(VDD-VOUT)]×(VDD-VOUT)…(2)
After multiple contact panel manufactures complete, see through each panel is tested, can learn whether the element of each panel occurs variation.Suppose because process variation, make the critical voltage VTH of switch T1 in the corresponding sensing circuit of one of them panel and switch T2 compare the switch T1 of other panels and the critical voltage VTH of switch T2 has produced deviant α, wherein α can be arbitrary value.Now the electric current I DS1A of the IDS2A of switch T2 and switch T1 can be expressed as following formula (3) and formula (4):
IDS2A＝(β/2)×[(VINIT1+VSIG-VSS)-(VTH+α)]
2…(3)
IDS1A＝(β/2)×[(VCC1-VOUT)-(VTH+α)-1/2(VDD-VOUT)]×(VDD-VOUT)…(4)
Above-mentioned deviant α can carry out various electrical parameters (for example voltage, electric current, critical voltage etc.) to each panel by automatic test equipment to be measured and learns.Cause voltage gain Q skew or the operation failure of amplifying unit 120 for fear of process variation, in this embodiment, can predeterminated voltage VINT be set to the summation of voltage VINT1 and deviant α, that is VINT=VINT1+ α, and predeterminated voltage VCC is set to the summation of voltage VCC1 and deviant α, that is VCC=VCC1+ α.Again bring the predeterminated voltage VINT after adjusting and predeterminated voltage VCC into above-mentioned formula (3) and formula (4), can obtain original formula (1) and formula (2).That is to say, by above-mentioned configuration, can improve the impact that process variation or component ageing bring switch T1 and switch T2, and then make switch T1 and switch T2 can keep stable operating current.The operation of above-mentioned adjustment voltage, can complete by automated test device or controller, but content of the present invention is not as limit.
Please refer to Fig. 3 A, Fig. 3 A is the schematic diagram that an embodiment of the content according to the present invention illustrates a kind of amplifying unit 300.Amplifying circuit 142 in the amplifying unit 200 of above-mentioned Fig. 2 is one-stage amplifier.In certain embodiments, the amplifier that amplifying circuit 142 has comprised multi-stage serial connection, to have higher voltage gain Q.For example, compared to amplifying unit 200, amplifying unit 300 is more driven by voltage VEE through default, and amplifying circuit 142 in amplifying unit 300 more comprises switch T3, switch T4, switch T5 and switch T6.Wherein switch T1 and switch T2 form the 1st grade of amplifier, and switch T3 and switch T4 have formed the 2nd grade of amplifier, and switch T5 and switch T6 have formed 3rd level amplifier.Above are only illustration, content of the present invention is not as limit, and those skilled in the art can select according to needed voltage gain Q the framework of corresponding amplifying circuit 142.
Particularly, the first end of switch T1 is in order to receiving system supply voltage VDD, and the control end of switch T1 is in order to receive predeterminated voltage VCC.The second end of the first end electric property coupling switch T1 of switch T2, and the second end of switch T2 is in order to receiving system supply voltage VSS, and the control end of switch T2 is in order to receive difference signal VSIG.The first end of switch T3 is in order to receive predeterminated voltage VCC, and the control end of switch T3 is also in order to receive predeterminated voltage VCC.The second end of the first end electric property coupling switch T3 of switch T4, the second end of switch T4 is in order to receive predeterminated voltage VEE, and the second end of the control end electric property coupling switch T1 of switch T4, i.e. all the second end of electric property coupling switch T1 and first ends of switch T2 of the control end of switch T4.The first end of switch T5 is in order to receiving system supply voltage VDD, the second end of switch T5 is in order to produce output signal VOUT, and the second end of the control end electric property coupling switch T3 of switch T5, i.e. all the second end of electric property coupling switch T3 and first ends of switch T4 of the control end of switch T5.The second end of the first end electric property coupling switch T5 of switch T6, the second end of switch T6 is in order to receive predeterminated voltage VEE, and the control end of the control end electric property coupling switch T4 of switch T6, i.e. all control end, the second end of switch T1 and first ends of switch T2 of electric property coupling switch T4 of the control end of switch T6.
Under normal operation, predeterminated voltage VEE be set to be more than or equal to supply voltage VSS and critical voltage VTH's and voltage VEE1, that is voltage VEE1≤VSS+VTH, so that switch T3, switch T4 and switch T6 all operate in saturation region.Therefore the electric current I DS4 of the electric current I DS3 of switch T3, switch T4 and the electric current I DS6 of switch T6 can be expressed as following formula (5), formula (6) and formula (7), wherein β is the process parameter of switch T1～T6, VS1 is the voltage of the second end of switch T1, and VS3 is the voltage of the second end of switch T3:
IDS3＝(β/2)×[(VCC1-VS3)-VTH]
2…(5)
IDS4＝(β/2)×[(VS1-VEE1)-VTH]
2…(6)
IDS6＝(β/2)×[(VS1-VEE1)-VTH]
2…(7)
If the critical voltage VTH of the multiple switch T1～T6 in sensing circuit is because of process variation generation deviant α, now the electric current I DS4A of the IDS3A of switch T3, switch T4 can be expressed as following formula (8), formula (9) and formula (10) with the electric current I DS6A of the switch T6 that flows through:
IDS3A＝(β/2)×[(VCC1-VS3)-(VTH+α)]
2…(8)
IDS4A＝(β/2)×[(VS1-VEE1)-(VTH+α)]
2…(9)
IDS6A＝(β/2)×[(VS1-VEE1)-(VTH+α)]
2…(10)
Similarly, for fear of the impact of process variation, can predeterminated voltage VCC be set to the summation of voltage VCC1 and deviant α, that is VCC=VCC1+ α, and predeterminated voltage VEE is set to the difference of voltage VEE1 and deviant α, that is VEE=VEE1-α.Again bring the predeterminated voltage VCC after adjusting and predeterminated voltage VEE into above-mentioned formula (8), formula (9) and formula (10), can obtain original formula (5), formula (6) and formula (7).
Because switch T1 and switch T2 were with previously amplifying unit 200 was similar, the relation of its operating current is also same as aforesaid formula (1)～formula (4), therefore repeat no more in this.By the configuration mode of above-mentioned multiple predeterminated voltages, can effectively improve the impact that switch T1, switch T2, switch T3, switch T4 and switch T6 are made a variation.
Fig. 3 B is an embodiment of the content according to the present invention voltage gain Q of amplifying unit 300 before predeterminated voltage is adjusted that illustrate Fig. 3 A and the graph of relation of difference signal VSIG.Fig. 3 C is an embodiment of the content according to the present invention voltage gain Q of amplifying unit 300 after predeterminated voltage is adjusted that illustrate Fig. 3 A and the graph of relation of difference signal VSIG.
Please with reference to Fig. 3 A and Fig. 3 B, wherein suppose be respectively+3V of above-mentioned deviant α ,+2V ,+1V ,-1V ,-2V and-3V.As shown in Figure 3A, before predeterminated voltage VINIT, predeterminated voltage VCC and predeterminated voltage VEE not yet adjust, if multiple switch T1～T6 produces variation, can allow the voltage gain Q of amplifying unit 300 produce approximately 2～10 variation.If excessive as the voltage gain Q of amplifying unit 300, may make output signal VOUT supersaturation, and make the operation failure of the sensing circuit of contact panel.
On the contrary, as shown in Figure 3 C, after predeterminated voltage VINIT, VCC and VEE adjust, the voltage gain Q that can find out amplifying unit 300 obviously diminishes because of the scope that impact changes of process variation, and voltage gain Q all can stablize the number range falling about 6～7.
Please refer to Fig. 4, Fig. 4 is the schematic diagram that an embodiment of the content according to the present invention illustrates a kind of amplifying unit 400.Compared to the amplifying unit 300 in Fig. 3 A, the first end setting of the switch T3 of amplifying unit 400 is with receiving system supply voltage VDD.In this example, switch T3 changes and operates in linear zone, and reaches the application of different voltage gain Q.Wherein, the embodiment shown in all the other elements in amplifying unit 400 and its associative operation and above-mentioned Fig. 2 and Fig. 3 A is similar, therefore associated description is in this, it is no longer repeated.
If when processing procedure produces variation, the electric current I DS3 of switch T3 can be expressed as following formula (11):
IDS3＝(β/2)×[(VCC-VS3)-(VTH+α)-1/2(VDD-VS3)]×(VDD-VS3)…(11)
Similarly, predeterminated voltage VCC can be set to the summation of voltage VCC1 and deviant α, that is VCC=VCC1+ α, and reduces the variation of electric current I DS3.
It should be noted that the framework of above-mentioned amplifying unit 200,300 or 400 only uses the switch of single type, therefore can make processing procedure cost, and can have preferably yield.Those skilled in the art can be required according to the actual requirements voltage gain or circuit cost and the framework of the above-mentioned amplifying unit 200,300 or 400 of choice for use.The framework of above-mentioned amplifying unit 200,300 or 400 is only for illustrating, and content of the present invention is as limit, and those skilled in the art can its internal switch element of corresponding displacement, to reach different voltage gains.
In each embodiment of content of the present invention, each switch can be all types of transistors, for example, be metal oxide semiconductcor field effect transistor (MOSFET), bottom gate type transistor, top gate type transistor, thin-film transistor etc.Above are only illustration, the present invention is not as limit
Please refer to Fig. 5, Fig. 5 is the application schematic diagram that an embodiment of the content according to the present invention illustrates a kind of light sensing system 500.Comparator 100 shown in content of the present invention can be applicable to multiple electronic installation, the application such as the sensing circuit of such as aforesaid contact panel, light sensing apparatus, Hall sensing apparatus.For example, as shown in Figure 5, light sensing apparatus 500 comprises OPTICAL SENSORS 501, OPTICAL SENSORS 502, light shield 503 and comparator 100.OPTICAL SENSORS 501 can be photodiode, photo resistance etc. with light sensing 502.OPTICAL SENSORS 501 produces input signal VIN1 in order to detect the luminous intensity of environment to be measured.Light shield 503 is arranged in OPTICAL SENSORS 502, so that OPTICAL SENSORS 502 is only detected the background noise of environment to be measured, to export input signal VIN2.So, the output signal VOUT that utilizes comparator 100 to export, can learn the luminous intensity after wiping out background noise.Wherein, for example, for example, embodiment shown in operation and aforementioned Figure 1A of sampling unit (: the sampling unit 120 in Figure 1A) and amplifying unit (: the amplifying unit 140 in Figure 1A) is identical, therefore it is no longer repeated for associated description.
Please refer to Fig. 6, Fig. 6 is the application schematic diagram that an embodiment of the content according to the present invention illustrates a kind of Hall sensing apparatus 600.As shown in Figure 6, Hall sensing apparatus 600 comprises Hall element 601 and comparator 100.Hall element 601 is in order to produce input signal VIN1 and the input signal VIN2 of different numerical value according to electric current I F1 and electric current I F2.When output signal, VOUT is larger, represents that the voltage difference of input signal VIN1 and input signal VIN2 is larger, that is the magnetic field producing because of electric current I F1 and electric current I F2 is larger.So, can measure by comparator 100 magnetic field intensity of the two ends generation of Hall element 100.Wherein, for example, for example, embodiment shown in operation and aforementioned Figure 1A of sampling unit (: the sampling unit 120 in Figure 1A) and amplifying unit (: the amplifying unit 140 in Figure 1A) is identical, therefore it is no longer repeated for associated description.
In sum, the comparator that content of the present invention is invented can have multiple application, and can be by multiple voltage set-up mode lifting operation reliability effectively under process variation.
Although content of the present invention with execution mode openly as above; but it is not in order to limit the present invention; any those skilled in the art; not departing from the spirit and scope of content of the present invention; when doing various changes and amendment, therefore the protection range of content of the present invention is when being as the criterion depending on accompanying claims protection range person of defining.
Claims (10)
1. an electronic installation, is characterized in that, comprises:
One sampling unit, in order to optionally one first input signal and one second input signal are sampled, and produces a difference signal; And
One amplifying unit, in order to receive this difference signal and to produce an output signal, wherein this amplifying unit drives via one first predeterminated voltage, one second predeterminated voltage, a first system supply voltage and second system supply voltage,
Wherein this first predeterminated voltage is in order to an operating point of this amplifying unit to be set, and this second predeterminated voltage is greater than this first system supply voltage.
2. electronic installation as claimed in claim 1, it is characterized in that, this amplifying unit comprises a switch, there is a critical voltage, in the time of normal running, this first predeterminated voltage is one first voltage, this second predeterminated voltage is a second voltage that is greater than the summation of this first system supply voltage and this critical voltage, in the time that this switch morphs, this first predeterminated voltage is set to the summation of a deviant of this first voltage and this critical voltage, and this second predeterminated voltage is set to the summation of this second voltage and this deviant.
3. electronic installation as claimed in claim 1, is characterized in that, this sampling unit comprises:
One electric capacity, in order to produce this difference signal;
One first switch, in order to according to one first control signal selectivity conducting, to transmit this first input signal to this electric capacity; And
One second switch, in order to according to one second control signal selectivity conducting, to transmit this second input signal to this electric capacity, wherein this first control signal and this second control signal are anti-phase.
4. electronic installation as claimed in claim 3, is characterized in that, this amplifying unit comprises:
One the 3rd switch, in order to transmit this first predeterminated voltage to this electric capacity according to this first control signal selectivity conducting, to adjust the position standard of this difference signal.
5. electronic installation as claimed in claim 4, it is characterized in that, this amplifying unit also drives via one the 3rd predeterminated voltage, the 3rd predeterminated voltage is more than or equal to this second system supply voltage, this amplifying unit more comprises multiple switches, each those switch comprises a first end, one second end and a control end, and those switches comprise:
One the 4th switch, wherein this first end of the 4th switch is supplied voltage in order to receive this first system, and this control end of the 4th switch is in order to receive this second predeterminated voltage;
One the 5th switch, wherein this second end of this first end electric property coupling the 4th switch of the 5th switch, this second end of the 5th switch is in order to receive this second system supply voltage, and this control end of the 5th switch is in order to receive this difference signal;
One the 6th switch, wherein this first end of the 6th switch is supplied voltage in order to receive this second predeterminated voltage or this first system, and this control end of the 6th switch is in order to receive this second predeterminated voltage;
One minion is closed, this second end of this first end electric property coupling the 6th switch that wherein this minion is closed, and this second end that this minion is closed is in order to receive the 3rd predeterminated voltage, and this second end of this control end electric property coupling the 4th switch of this minion pass;
One the 8th switch, wherein this first end of the 8th switch is in order to receive this first system supply voltage, and this second end of the 8th switch is in order to export this output signal, and this second end of this control end electric property coupling the 6th switch of the 8th switch; And
One the 9th switch, wherein this second end of this first end electric property coupling the 8th switch of the 9th switch, this second end of the 9th switch is in order to receive the 3rd predeterminated voltage, and this second end of this control end electric property coupling the 4th switch of the 9th switch.
6. electronic installation as claimed in claim 5, it is characterized in that, in the time of normal running, the 3rd predeterminated voltage is one first voltage, in the time that those switches morph, this first predeterminated voltage is set to the summation of a deviant of a critical voltage of this first voltage and those switches, and this second predeterminated voltage is set to the summation of this second voltage and this deviant, and the 3rd predeterminated voltage is set to the difference of this first voltage and this deviant.
7. electronic installation as claimed in claim 4, is characterized in that, this amplifying unit also comprises:
One the 4th switch, comprise a first end, one second end and a control end, wherein this first end of the 4th switch is in order to receive this first system supply voltage, this second end of the 4th switch is in order to produce this output signal, and this control end of the 4th switch is in order to receive this second predeterminated voltage; And
One the 5th switch, comprise a first end, one second end and a control end, wherein this second end of this first end electric property coupling the 4th switch of the 5th switch, this first end of the 5th switch is in order to receive this second system supply voltage, and this control end of the 5th switch is in order to receive this difference signal.
8. a comparator, this comparator has an output, in order to export an output signal, it is characterized in that, and this comparator comprises:
One first switch, comprises a first end, one second end and a control end, and wherein this first end of this first switch is in order to receive one first input signal, and this control end of this first switch is in order to receive one first control signal;
One second switch, comprise a first end, one second end and a control end, wherein this first end of this second switch is in order to receive one second input signal, and this control end of this second switch is in order to receive one second control signal, and wherein this first control signal and this second control signal are anti-phase;
One electric capacity, wherein this second end of this first switch of first end electric property coupling of this electric capacity and this second end of this second switch;
One the 3rd switch, comprise a first end, one second end and a control end, wherein one second end of this this electric capacity of first end electric property coupling of the 3rd switch, this second end of the 3rd switch is in order to receive one first predeterminated voltage, and this control end of the 3rd switch is in order to receive this first control signal;
One the 4th switch, comprise a first end, one second end and a control end, wherein this first end of the 4th switch is in order to receive a first system supply voltage, this second end of the 4th switch is electrically coupled to the output of this comparator, and this control end of the 4th switch is in order to receive one second predeterminated voltage; And
One the 5th switch, comprise a first end, one second end and a control end, wherein this first end of the 5th switch is electrically coupled to this second end of this electric capacity, this second end of the 5th switch is in order to receive a second system supply voltage, and this control end of the 5th switch is electrically coupled to this second end of this electric capacity.
9. comparator as claimed in claim 8, is characterized in that, also comprises:
One the 6th switch, comprises a first end, one second end and a control end, and wherein this first end of the 6th switch is supplied voltage in order to receive this second predeterminated voltage or this first system, and this control end of the 6th switch is in order to receive this second predeterminated voltage;
One minion is closed, comprise a first end, one second end and a control end, this second end of this first end electric property coupling the 6th switch that wherein this minion is closed, this second end that this minion is closed is in order to receive one the 3rd predeterminated voltage, and this second end of this control end electric property coupling the 4th switch of this minion pass;
One the 8th switch, comprise a first end, one second end and a control end, wherein this first end of the 8th switch is in order to receive this first system predeterminated voltage, this second end of the 8th switch is electrically coupled to this output, and this second end of this control end electric property coupling the 6th switch of the 8th switch; And
One the 9th switch, comprise a first end, one second end and a control end, wherein this second end of this first end electric property coupling the 8th switch of the 9th switch, this second end of the 9th switch is in order to receive the 3rd predeterminated voltage, and this second end of this control end electric property coupling the 4th switch of the 9th switch.
10. comparator as claimed in claim 9, it is characterized in that, in the time of normal running, this first predeterminated voltage is one first voltage, this second predeterminated voltage is a second voltage that is greater than the summation of a critical voltage of this first system supply voltage and those switches, the 3rd predeterminated voltage is a tertiary voltage that is more than or equal to this second system supply voltage, in the time that those switches morph, this first predeterminated voltage is set to the summation of a deviant of this first voltage and this critical voltage, this the second predeterminated voltage is set to the summation of this second voltage and this deviant, and the 3rd predeterminated voltage is set to the difference of this tertiary voltage and this deviant.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW103116568A TWI545890B (en) | 2014-05-09 | 2014-05-09 | Electronic device and comparator thereof |
| TW103116568 | 2014-05-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104079270A true CN104079270A (en) | 2014-10-01 |
| CN104079270B CN104079270B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410312025.5A Active CN104079270B (en) | 2014-05-09 | 2014-07-02 | Electronic device and comparator thereof |
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| Country | Link |
|---|---|
| CN (1) | CN104079270B (en) |
| TW (1) | TWI545890B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572603A (en) * | 2014-10-17 | 2016-05-11 | 财团法人金属工业研究发展中心 | Power management system and detector for power supply module of power management system |
| CN106441562A (en) * | 2016-09-13 | 2017-02-22 | 友达光电股份有限公司 | Piezoelectric sensor reading circuit |
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| US3663888A (en) * | 1970-02-16 | 1972-05-16 | Gte Laboratories Inc | All-fet linear voltage difference amplifier |
| US4697153A (en) * | 1986-09-18 | 1987-09-29 | Standard Microsystems Corp. | Cascode auto bias circuit |
| CN1682437A (en) * | 2002-09-10 | 2005-10-12 | 沃福森微电子股份有限公司 | Transconductance amplifiers |
| US20080111587A1 (en) * | 2006-11-13 | 2008-05-15 | Wei-Li Liu | Input receiver with negative voltage generator and related method |
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- 2014-05-09 TW TW103116568A patent/TWI545890B/en active
- 2014-07-02 CN CN201410312025.5A patent/CN104079270B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3663888A (en) * | 1970-02-16 | 1972-05-16 | Gte Laboratories Inc | All-fet linear voltage difference amplifier |
| US4697153A (en) * | 1986-09-18 | 1987-09-29 | Standard Microsystems Corp. | Cascode auto bias circuit |
| CN1682437A (en) * | 2002-09-10 | 2005-10-12 | 沃福森微电子股份有限公司 | Transconductance amplifiers |
| US20080111587A1 (en) * | 2006-11-13 | 2008-05-15 | Wei-Li Liu | Input receiver with negative voltage generator and related method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572603A (en) * | 2014-10-17 | 2016-05-11 | 财团法人金属工业研究发展中心 | Power management system and detector for power supply module of power management system |
| CN106441562A (en) * | 2016-09-13 | 2017-02-22 | 友达光电股份有限公司 | Piezoelectric sensor reading circuit |
| CN106441562B (en) * | 2016-09-13 | 2018-12-07 | 友达光电股份有限公司 | Piezoelectric sensor reading circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI545890B (en) | 2016-08-11 |
| CN104079270B (en) | 2017-05-10 |
| TW201543806A (en) | 2015-11-16 |
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