CN206058022U - A kind of charge pump output voltage temperature compensation circuit - Google Patents
A kind of charge pump output voltage temperature compensation circuit Download PDFInfo
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- CN206058022U CN206058022U CN201620994014.4U CN201620994014U CN206058022U CN 206058022 U CN206058022 U CN 206058022U CN 201620994014 U CN201620994014 U CN 201620994014U CN 206058022 U CN206058022 U CN 206058022U
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- charge pump
- output voltage
- voltage
- temperature
- operational amplifier
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Abstract
The utility model discloses a kind of charge pump output voltage temperature compensation circuit, including charge pump, operational amplifier and bleeder circuit.Wherein, bleeder circuit is by resistance and just has, the current source of negative temperature characteristic is composed in series, charge pump output voltage obtains sampled voltage after being electrically connected to bleeder circuit, the reference voltage of sampled voltage and input is electrically connected to the input of operational amplifier, the output of operational amplifier is electrically connected to charge pump, sampled voltage is compared by operational amplifier with reference voltage, the input of the output control charge pump of operational amplifier, voltage characteristic of the bleeder circuit using the temperature characterisitic control resistance two ends of current source, realization carries out temperature-compensating to charge pump output voltage, using current source just, the voltage characteristic at negative temperature characteristic control resistance two ends, so as to carry out temperature-compensating to charge pump output voltage.The output voltage temperature characterisitic scalable of charge pump, can both realize the negative temperature characteristic of output voltage, can realize the positive temperature characterisitic of output voltage again.
Description
Technical field
This utility model is related to cmos semiconductor field, more particularly to memorizer and charge pumping technique field.
Background technology
At present, general charge pump adopts feedback control circuit regulated output voltage as shown in Figure 1, comprising bleeder circuit 11,
Operational amplifier 12, charge pump 13.Voltage on the basis of wherein Vref, Vout represent charge pump output voltage, resistor voltage divider circuit
It is in series by resistance R1 and resistance R0, charge pump is charge pump liter (drop) volt circuits at different levels.Charge pump output voltage Vout Jing
Sampled voltage Vdet is obtained after crossing bleeder circuit partial pressure, by a high-precision operational amplifier by sampled voltage Vdet and base
Quasi- voltage Vref compares, the input of the output control charge pump of operational amplifier, so as to export expected burning voltage, electric charge
Pump Output Voltage Formula is：
Vout=R1*（Vref/R0）+ Vref,
Wherein Vout be charge pump output voltage, R1 and R0 be divider resistance resistance, voltage on the basis of Vref.Vref conducts
Reference voltage is without temperature characterisitic, therefore the output voltage values Vout of charge pump is also without temperature characterisitic, and the root in reservoir designs
According to the demand of technique, under different temperatures, cell's is different by erasable complexity, and the characteristic such as threshold voltage is different, so memorizer
Program voltage, read voltage need certain temperature characterisitic.
As shown in Fig. 2 for a kind of existing charge pump with temperature-compensating, such as Chinese patent CN103138564A is proposed
Charge pump construction, comprising bleeder circuit 21, operational amplifier 22, charge pump 23, wherein, two poles are increased in bleeder circuit
Pipe, using the temperature characterisitic of diode PN junction, has carried out temperature-compensating to charge pump output voltage.But, this charge pump construction
In diode circuit parasitic triode leakage effect is easily produced in laying out pattern, and temperature coefficient is wayward.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of charge pump output voltage temperature compensation circuit, and it can
Effective temperature-compensating is carried out to charge pump output voltage according to system requirements.
In order to solve above technical problem, this utility model provides a kind of charge pump output voltage temperature compensation circuit,
Including charge pump, operational amplifier and bleeder circuit, wherein, bleeder circuit is source-series by resistance and the electric current with temperature characterisitic
Composition, charge pump output voltage obtain the reference voltage electricity of sampled voltage, sampled voltage and input after being electrically connected to bleeder circuit
It is connected to the input of operational amplifier, the output of operational amplifier is electrically connected to charge pump, operational amplifier is by sampled voltage
Compared with reference voltage, the input of the output control charge pump of operational amplifier；Bleeder circuit is special using the temperature of current source
Property control resistance two ends voltage characteristic, realization carries out temperature-compensating to charge pump output voltage.
Preferably, the current source has positive temperature characterisitic and negative temperature characteristic.
Preferably, the charge pump output voltage has positive temperature characterisitic and negative temperature characteristic.
The beneficial effects of the utility model are, using the voltage at the positive and negative temperature characterisitic control resistance two ends of current source
Characteristic, so as to effectively carry out temperature-compensating to charge pump output voltage.
With reference to the accompanying drawings and detailed description this utility model is described further.
Description of the drawings
Fig. 1 is a kind of existing charge pump construction schematic diagram with regulated output voltage.
Fig. 2 is a kind of existing charge pump construction schematic diagram with temperature-compensating.
Fig. 3 is a kind of charge pump output voltage temperature compensation circuit structural representation of this utility model specific embodiment.
Fig. 4 is another kind of charge pump output voltage temperature compensation circuit structural representation of this utility model specific embodiment
Figure.
Fig. 5 is a kind of charge pump implementation schematic diagram of this utility model specific embodiment.
Fig. 6 is a kind of operational amplifier configuration schematic diagram of employing telescoping structure of the present utility model.
Fig. 7 is a kind of current source structure schematic diagram of this utility model specific embodiment.
Specific embodiment
As shown in figure 3, for a kind of charge pump output voltage temperature compensation circuit structure of this utility model specific embodiment
Schematic diagram, the charge pump output voltage temperature compensation circuit are made up of bleeder circuit 31, operational amplifier 32 and charge pump 33, its
In, 33 output voltage Vout of charge pump obtains sampled voltage Vdet after being connected to bleeder circuit 31, will by operational amplifier 32
Compared with reference voltage V ref of outside input, the output of operational amplifier 32 adjusts the defeated of charge pump 33 to sampled voltage Vdet
Enter, bleeder circuit 31 is in series by resistance R1 and with the current source I0 for having temperature characterisitic, centre tap goes out a sampling electricity
Pressure Vdet, using the voltage characteristic at the temperature characterisitic control resistance R1 two ends of current source I0, realizes that the negative temperature of current source I0 is special
Property and positive temperature characterisitic.33 Output Voltage Formula of charge pump is：
Vout=I0* R1+Vref
Wherein
I0=I0i+k(T-25℃ )
Vout is charge pump output voltage, and I0i is current constant, and k is temperature coefficient, and T represents the temperature under any environment,
25 DEG C of finger room temperature, R1 is divider resistance, voltage on the basis of Vref.Vref has temperature characterisitic without temperature characterisitic, I0, when temperature is sent out
During changing, the change with I0 is changed by output voltage Vout, realizes effective temperature-compensating.
As shown in figure 4, another kind of charge pump output voltage temperature compensation circuit for this utility model specific embodiment is tied
Structure schematic diagram.43 output voltage Vout of charge pump is connected to bleeder circuit 41, and 43 output voltage Vout of charge pump is through partial pressure electricity
Sampled voltage Vdet is obtained after 41 partial pressure of road, by operational amplifier 42 by the reference voltage of sampled voltage Vdet and outside input
Vref compares, the input of the output control charge pump 43 of operational amplifier 42.Its validity feature is that bleeder circuit 41 is by electricity
Resistance R1, resistance R0 and current source Iptat are in series, and Iptat is expressed as the current source of positive temperature characterisitic.Charge pump 43 exports table
Up to formula it is：
Vout=(Iptat+Vref/R0)* R1+Vref
When the temperature increases, the electric current of Iptat becomes big, and the electric current Vref/R0 for flowing through RO is constant, flows through the current value of R1
Iptat+Vref/R0 phases are strained greatly, so output voltage (Iptat+Vref/R0) the * R1+Vref of charge pump 43 become big, Vout
Realize that positive temperature characterisitic is exported.
As shown in figure 5, being a kind of charge pump implementation of the present utility model 50.Wherein, CK and CKB are represented and biphase are not handed over
Folded clock, IN is input signal, and charge pump output result VOUT is electrically connected to sample circuit.
As shown in fig. 6, illustrate Figure 60 for a kind of operational amplifier configuration of employing telescoping structure of the present utility model, its
In, VCC is power supply signal, and VB1, VB2 are two bias voltages, inputs of the VDET and VREF for amplifier, operational amplifier
Output result APO be connected to charge pump.
As shown in fig. 7, a kind of current source structure for this utility model specific embodiment illustrates Figure 70.The current source
In Iptat, VCC is power supply signal, and current source Iptat includes three image current branch roads, respectively by PMOS M101, M102
Constitute with M103, and be respectively configured to provide electric current I101, I102 and the I103 being in proportion；Charge pump current source Iptat
Also include two PNP transistors Q101 and PNP transistor Q102, the emitter area of Q102 is emitter area N times of Q101；
Resistance R100 is connected between the emitter stage of PNP transistor Q102 and PMOS transistor M102.Current source Iptat also includes fortune
Calculate amplifier, two inputs of operational amplifier A MP connect A points and B points respectively, node A and B be respectively PMOS M101 and
The drain electrode of M102, outfan connection PMOS M101, M102 and the grid of M103 of operational amplifier A MP.Current source Iptat
Also include M104, M105 mirror image circuits and resistance R100.The producing method of current source Iptat circuits is：Two PNP transistors
Base radio pressure difference i.e. be Δ VBE, the electric current for flowing through resistance R100 is IR100=Δ VBE/R100；Δ VBE is positive temperature
Coefficient；Δ VBE/R100 also be positive temperature coefficient, obtain the electric current I102 of positive temperature coefficient, electric current again through metal-oxide-semiconductor M103,
Export Iptat electric currents to use directly to charge pump output voltage temperature compensation circuit after M104, M105 mirror image circuit.
Integral Thought of the present utility model is, using the voltage characteristic at the temperature characterisitic control resistance two ends of current source,
So as to temperature-compensating is effectively carried out to charge pump output voltage, output voltage is capable of achieving negative temperature characteristic or positive temperature characterisitic.
The current source implementation of charge pump of the present utility model is not limited to embodiment discussed above.Based on this reality
Should also be as being considered within protection domain of the present utility model with the obvious conversion or replacement of new enlightenment.Tool above
Body embodiment is used for disclosing optimal implementation of the present utility model, so that one of ordinary skill in the art can apply
Numerous embodiments of the present utility model and various alternative are reaching the purpose of this utility model.
Claims (3)
1. a kind of charge pump output voltage temperature compensation circuit, including charge pump, operational amplifier and bleeder circuit, its feature exist
In,
Bleeder circuit is composed in series by resistance and the current source with temperature characterisitic, and charge pump output voltage is electrically connected to partial pressure electricity
The reference voltage that sampled voltage, sampled voltage and input are obtained behind road is electrically connected to the input of operational amplifier, operation amplifier
The output of device is electrically connected to charge pump, and sampled voltage is compared by operational amplifier with reference voltage, the output of operational amplifier
The input of control charge pump；
Voltage characteristic of the bleeder circuit using the temperature characterisitic control resistance two ends of current source, realization enter to charge pump output voltage
Trip temperature is compensated.
2. charge pump output voltage temperature compensation circuit as claimed in claim 1, the current source have positive temperature characterisitic and
Negative temperature characteristic.
3. charge pump output voltage temperature compensation circuit as claimed in claim 1, the charge pump output voltage have positive temperature
Degree characteristic and negative temperature characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620994014.4U CN206058022U (en) | 2016-08-31 | 2016-08-31 | A kind of charge pump output voltage temperature compensation circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620994014.4U CN206058022U (en) | 2016-08-31 | 2016-08-31 | A kind of charge pump output voltage temperature compensation circuit |
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| Publication Number | Publication Date |
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| CN206058022U true CN206058022U (en) | 2017-03-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107783583A (en) * | 2016-08-31 | 2018-03-09 | 北京同方微电子有限公司 | A kind of charge pump output voltage temperature compensation circuit |
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2016
- 2016-08-31 CN CN201620994014.4U patent/CN206058022U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107783583A (en) * | 2016-08-31 | 2018-03-09 | 北京同方微电子有限公司 | A kind of charge pump output voltage temperature compensation circuit |
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