CN208459893U - A kind of reference circuit applied in Internet of Things - Google Patents
A kind of reference circuit applied in Internet of Things Download PDFInfo
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- CN208459893U CN208459893U CN201820824999.5U CN201820824999U CN208459893U CN 208459893 U CN208459893 U CN 208459893U CN 201820824999 U CN201820824999 U CN 201820824999U CN 208459893 U CN208459893 U CN 208459893U
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Abstract
The utility model discloses a kind of reference circuits applied in Internet of Things, comprising: a start-up circuit one, for starting the self-regulating votage circuit of the reference circuit；One self-regulating votage circuit uses self-control technology, and circuit power is significantly improved in wider frequency range and inhibits ratio；One start-up circuit two avoids power supply coupled noise caused by conventional start-up circuit for starting the reference generating circuit of the reference circuit；One reference generating circuit generates high-precision reference voltage by temperature-compensating using self-biasing current mirror structure.A kind of reference circuit of high PSRR of the utility model does not use operational amplifier, does not use filter capacitor yet, with self-regulation technology, generates the reference voltage of high PSRR.
Description
Technical field
The present invention relates to reference voltage circuit field more particularly to a kind of reference circuits applied in Internet of Things.
Background technique
In IoT applications, the recent tendency of modern system on chip (SOC) design is by analog circuit and noisy number
Word circuit, switched capacitor and RF circuit are placed on together on same tube core, therefore the noise from power supply is with regard to very important.This
Kind of noise can significant reduction whole system performance, especially in High Definition Systems.It is steady in order to be generated in high-precision applications
Fixed reference voltage, reference circuit must all have high PSRR (PSRR) in low frequency and high frequency.Common method is
It the use of low dropout voltage regulator (LDO) is the power supply of benchmark circuit.But this method needs the fortune of a high open-loop gain and wide bandwidth
Amplifier is calculated, this obviously increases silicon area and power consumption.Another method is using a High Gain Feedback loop, this is also avoided not
Power requirement.
Summary of the invention
To overcome the above-mentioned problems of the prior art, the main purpose of the present invention is to provide one kind to have the suppression of high power supply
The reference circuit of ratio processed does not use operational amplifier, does not use filter capacitor yet, with self-regulation technology, generates high power supply suppression
The reference voltage of ratio processed.In view of the above and other objects, the present invention provides a kind of reference circuit applied in Internet of Things, until
Include: less
One start-up circuit one, for starting the self-regulating votage circuit of the reference circuit；One self-regulating votage circuit, is adopted
With self-control technology, circuit power is significantly improved in wider frequency range and inhibits ratio；One start-up circuit two, for opening
The reference generating circuit for moving the reference circuit avoids power supply coupled noise caused by conventional start-up circuit；One benchmark generates
Circuit generates high-precision reference voltage by temperature-compensating using self-biasing current mirror structure.
The invention proposes a kind of reference circuits applied in Internet of Things, comprising:
The start-up circuit one is by first capacitor C1, the first PMOS tube PM1, the first NMOS tube NM1 and the second NMOS tube NM2
It constitutes；The source electrode of PM1 pipe connects supply voltage VDD；The drain electrode of the grid and PM1 pipe of PM1 pipe, the grid of NM1 pipe, NM2 pipe
Drain electrode is connected with one end of capacitor C1；The other end of capacitor C1, the source electrode of NM1 pipe and the source electrode ground connection of NM2 pipe.
The self-regulating votage circuit is by the second PMOS tube PM2, third PMOS tube PM3, the 4th PMOS tube PM4, the 5th
PMOS tube PM5, the 6th PMOS tube PM6, third NMOS tube NM3, the 4th NMOS tube NM4, the 5th NMOS tube NM5, the 6th NMOS tube
NM6, the 7th NMOS tube NM7, the 8th NMOS tube NM8 and the 9th NMOS tube NM9 are constituted；The source electrode of the source electrode of PM2 pipe and PM3 pipe is all
It is connected with supply voltage VD；The grid of PM2 pipe and the grid of PM3 pipe, the drain electrode of PM2 pipe, the drain electrode of NM1 pipe, the leakage of NM3 pipe
Pole is connected；The drain electrode of PM3 pipe and the source electrode of PM4 pipe, the source electrode of PM6 pipe are connected with the drain electrode of NM9 pipe, and node label is
A, the output end as the reference generating circuit reference voltage VREG；The drain electrode of PM4 pipe is connected with the source electrode of PM5 pipe；PM5
The drain electrode of pipe and the drain electrode of NM5 pipe, the grid of the grid of NM5 pipe, NM7 pipe are connected with the grid of NM3 pipe；The drain electrode of PM6 pipe
Drain electrode with the grid of NM9 pipe, NM7 pipe is connected with the grid of NM2 pipe；The source electrode of NM3 pipe is connected with the drain electrode of NM4 pipe；
The grid of NM4 pipe and the grid of NM6 pipe, the source electrode of the drain electrode of NM6 pipe, NM5 pipe are connected with the grid of NM8 pipe；The source of NM7 pipe
Pole is connected with the drain electrode of NM8 pipe；The source electrode of NM4 pipe, the source electrode of NM6 pipe, the source electrode of NM8 pipe and the source electrode of NM9 pipe are all grounded.
The start-up circuit two is by the 7th PMOS tube PM7, the 8th PMOS tube PM8, the 9th PMOS tube PM9, the tenth NMOS tube
NM10, the 11st NMOS tube NM11, the 12nd NMOS tube NM12 and the 13rd NMOS tube NM13 are constituted；The source electrode of PM7 pipe connects
Supply voltage VDD；The source electrode of PM8 pipe is connected with the drain electrode of PM3 pipe；The drain electrode of PM8 pipe is connected with the source electrode of PM9 pipe；PM8
The grid of pipe is connected with the grid of PM4 pipe；The grid of PM9 pipe is connected with the drain electrode of the grid of PM5 pipe and NM10 pipe；PM9
The drain electrode of pipe is connected with the grid of the drain electrode of NM12 pipe and NM12 pipe；The drain electrode of the grid and PM7 pipe of PM7 pipe, NM10 pipe
Grid is connected with the drain electrode of NM11 pipe；The drain electrode of the source electrode and NM13 pipe of NM12 pipe, the grid of NM13 pipe and the grid of NM11 pipe
Pole is connected；The source electrode of NM10 pipe, the source electrode of NM11 pipe and the source electrode of NM13 pipe are all grounded.
The reference generating circuit is by first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the one or three
Pole pipe Q1, the second triode Q2, third transistor Q3, the tenth PMOS tube PM10, the 11st PMOS tube PM11, the 12nd PMOS tube
PM12, the 13rd PMOS tube PM13, the 14th PMOS tube PM14, the 15th PMOS tube PM15, the 14th NMOS tube NM14, the tenth
Five NMOS tube NM15, the 16th NMOS tube NM16 and the 17th NMOS tube NM17 are constituted；The leakage of the source electrode and PM3 pipe of PM10 pipe
The source electrode of pole, PM12 pipe is connected with the source electrode of PM14 pipe；The grid of PM10 pipe and the grid of PM4 pipe, the grid of PM12 pipe,
The drain electrode of the grid of PM14 pipe, PM11 pipe is connected with one end of resistance R1；The drain electrode of PM10 pipe is connected with the source electrode of PM11 pipe
It connects；The drain electrode of PM12 pipe is connected with the source electrode of PM13 pipe；The drain electrode of PM14 pipe is connected with the source electrode of PM15 pipe；PM11 pipe
The other end of the grid of grid and PM5 pipe, the grid of PM13 pipe, the grid of PM15 pipe, resistance R1 is connected with the drain electrode of NM14 pipe
It connects；The drain electrode of PM13 pipe and one end of resistance R2, the grid of NM15 pipe are connected with the grid of NM17 pipe；The other end of resistance R2
It is connected with the grid of the drain electrode of NM16 pipe, NM14 pipe with the grid of NM16 pipe；The drain electrode phase of the source electrode of NM14 pipe and NM15 pipe
Connection；The source electrode of NM16 pipe is connected with the drain electrode of NM17 pipe；The source electrode of NM15 pipe is connected with the emitter of triode Q1；
The source electrode of NM17 pipe is connected with one end of resistance R3；The other end of resistance R3 is connected with the emitter of triode Q2；PM15
The drain electrode of pipe is connected with one end of the grid of PM6 pipe and resistance R4, node label B, the output as reference voltage VBG
End；The other end of resistance R4 is connected with the emitter of triode Q3；The base stage of triode Q1, the collector of Q1, the base stage of Q2,
The collector of the collector of Q2, the base stage of Q3, Q3 is all grounded.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of reference circuit figure applied in Internet of Things of the present invention.
Specific embodiment
As shown in connection with fig. 1, in the following embodiments, the reference circuit applied in Internet of Things, includes at least:
One start-up circuit one, for starting the self-regulating votage circuit of the reference circuit；One self-regulating votage circuit uses self
Regulation technology significantly improves circuit power in wider frequency range and inhibits ratio；One start-up circuit two, for starting the base
The reference generating circuit of quasi- circuit avoids power supply coupled noise caused by conventional start-up circuit；One reference generating circuit uses
Self-biasing current mirror structure generates high-precision reference voltage by temperature-compensating.
The start-up circuit one is by first capacitor C1, the first PMOS tube PM1, the first NMOS tube NM1 and the second NMOS tube NM2
It constitutes；When the moment powered on, supply voltage VDD is a high voltage, and PM1 is connected, so the grid end of NM1 pipe is also a high voltage,
NM1 pipe is in the conductive state, to start self-regulating votage circuit, wherein capacitor C1 may production in start-up course for eliminating
Raw shakes certainly.
The self-regulating votage circuit is by the second PMOS tube PM2, third PMOS tube PM3, the 4th PMOS tube PM4, the 5th
PMOS tube PM5, the 6th PMOS tube PM6, third NMOS tube NM3, the 4th NMOS tube NM4, the 5th NMOS tube NM5, the 6th NMOS tube
NM6, the 7th NMOS tube NM7, the 8th NMOS tube NM8 and the 9th NMOS tube NM9 are constituted；Wherein, NM7 pipe, NM8 pipe, NM9 pipe and
PM6 pipe form Low ESR branch circuit, for VREG voltage sensing node A at variation and will feed current to PM3 manage, to subtract
The fluctuation of small VREG；NM7 pipe and the cascade of NM8 pipe, further decrease branch impedance, preferably to completely cut off power supply noise；On because
It states transistor to work in saturation region, transistor transconductance is much larger than drain-source conductance, and PM2 pipe and PM3 pipe have all selected long channel brilliant
Body pipe, to obtain higher power supply rejection ratio, its channel length takes 10um in the design.
The start-up circuit two is by the 7th PMOS tube PM7, the 8th PMOS tube PM8, the 9th PMOS tube PM9, the tenth NMOS tube
NM10, the 11st NMOS tube NM11, the 12nd NMOS tube NM12 and the 13rd NMOS tube NM13 are constituted；Start-up circuit two is for opening
Dynamic reference generating circuit, compared to conventional start-up circuit, in circuit design, the W/L of the NM11 pipe in start-up circuit two is long-range
In PM7 pipe, that is to say, that PM7 pipe works at saturation region, and NM11 works in deep triode region, the i.e. conducting resistance of NM11 pipe
Much smaller than the conducting resistance of PM7 pipe, the voltage fluctuation at NM10 tube grid is very small, it is meant that power supply noise is being coupled to benchmark
To be isolated before generation circuit, the performance of reference circuit is improved.
The reference generating circuit is by first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the one or three
Pole pipe Q1, the second triode Q2, third transistor Q3, the tenth PMOS tube PM10, the 11st PMOS tube PM11, the 12nd PMOS tube
PM12, the 13rd PMOS tube PM13, the 14th PMOS tube PM14, the 15th PMOS tube PM15, the 14th NMOS tube NM14, the tenth
Five NMOS tube NM15, the 16th NMOS tube NM16 and the 17th NMOS tube NM17 are constituted；Using self-biasing current mirror structure, by force
Voltage is equal to the emitter base voltage of Q1 pipe at voltage and NM17 pipe source electrode at NM15 pipe source electrode processed；Wherein M be PM12 pipe and
The ratio between the W/L of PM14 pipe, N are the ratio between the emitter areas of Q1 pipe and Q2 pipe, suitable by the size and selection that adjust M and N
R4/R3, the reference voltage that available temperature coefficient is zero.
The invention proposes a kind of reference circuits applied in Internet of Things, propose self-regulation technology and improved starting
Circuit obtains the power supply rejection ratio of superelevation with lower power in wider frequency range, compared with other circuits, does not make
With operational amplifier, filter capacitor is not used, is designed and emulates using 0.18 technique of smic yet, emulation display acquisition-
The PSRR of 112dB.
Although the present invention is illustrated using specific embodiment, the explanation of embodiment is not intended to limit of the invention
Range.One skilled in the art is by reference to explanation of the invention, without departing substantially from the spirit and scope of the present invention
In the case of, it is easy to carry out various modifications or embodiment can be combined, these also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of reference circuit applied in Internet of Things characterized by comprising
One start-up circuit one, for starting the self-regulating votage circuit of the reference circuit；One self-regulating votage circuit, uses
Self-control technology；One start-up circuit two, for starting the reference generating circuit of the reference circuit；One reference generating circuit,
Using self-biasing current mirror structure.
2. as described in claim 1 applied to the reference circuit in Internet of Things, it is characterised in that: the start-up circuit one is by the
One capacitor C1, the first PMOS tube PM1, the first NMOS tube NM1 and the second NMOS tube NM2 are constituted；The source electrode connection power supply electricity of PM1 pipe
Press VDD；The drain electrode of the grid and PM1 pipe of PM1 pipe, the drain electrode of the grid of NM1 pipe, NM2 pipe are connected with one end of capacitor C1；Electricity
Hold the other end of C1, the source electrode of NM1 pipe and the source electrode ground connection of NM2 pipe.
3. as described in claim 1 applied to the reference circuit in Internet of Things, it is characterised in that: the self-regulating votage circuit
By the second PMOS tube PM2, third PMOS tube PM3, the 4th PMOS tube PM4, the 5th PMOS tube PM5, the 6th PMOS tube PM6, third
NMOS tube NM3, the 4th NMOS tube NM4, the 5th NMOS tube NM5, the 6th NMOS tube NM6, the 7th NMOS tube NM7, the 8th NMOS tube
NM8 and the 9th NMOS tube NM9 is constituted；The source electrode of PM2 pipe and the source electrode of PM3 pipe are all connected with supply voltage VDD；PM2 pipe
The drain electrode of the grid of grid and PM3 pipe, the drain electrode of PM2 pipe, the drain electrode of NM1 pipe, NM3 pipe is connected；The drain electrode of PM3 pipe and PM4
The source electrode of the source electrode of pipe, PM6 pipe is connected with the drain electrode of NM9 pipe, node label A, joins as the reference generating circuit
Examine the output end of voltage VREG；The drain electrode of PM4 pipe is connected with the source electrode of PM5 pipe；The drain electrode and the drain electrode of NM5 pipe of PM5 pipe,
The grid of the grid of NM5 pipe, NM7 pipe is connected with the grid of NM3 pipe；The drain electrode of PM6 pipe and the grid of NM9 pipe, the leakage of NM7 pipe
Pole is connected with the grid of NM2 pipe；The source electrode of NM3 pipe is connected with the drain electrode of NM4 pipe；The grid of NM4 pipe and the grid of NM6 pipe
The source electrode of pole, the drain electrode of NM6 pipe, NM5 pipe is connected with the grid of NM8 pipe；The source electrode of NM7 pipe is connected with the drain electrode of NM8 pipe；
The source electrode of NM4 pipe, the source electrode of NM6 pipe, the source electrode of NM8 pipe and the source electrode of NM9 pipe are all grounded.
4. as described in claim 1 applied to the reference circuit in Internet of Things, it is characterised in that: the start-up circuit two is by the
Seven PMOS tube PM7, the 8th PMOS tube PM8, the 9th PMOS tube PM9, the tenth NMOS tube NM10, the 11st NMOS tube NM11, the tenth
Two NMOS tube NM12 and the 13rd NMOS tube NM13 are constituted；The source electrode of PM7 pipe connects supply voltage VDD；The source electrode of PM8 pipe with
The drain electrode of PM3 pipe is connected；The drain electrode of PM8 pipe is connected with the source electrode of PM9 pipe；The grid of PM8 pipe is connected with the grid of PM4 pipe
It connects；The grid of PM9 pipe is connected with the drain electrode of the grid of PM5 pipe and NM10 pipe；The drain electrode of PM9 pipe and the drain electrode of NM12 pipe and
The grid of NM12 pipe is connected；The drain electrode of the grid and PM7 pipe of PM7 pipe, the grid of NM10 pipe are connected with the drain electrode of NM11 pipe；
The drain electrode of the source electrode and NM13 pipe of NM12 pipe, the grid of NM13 pipe are connected with the grid of NM11 pipe；The source electrode of NM10 pipe, NM11
The source electrode of pipe and the source electrode of NM13 pipe are all grounded.
5. as described in claim 1 applied to the reference circuit in Internet of Things, it is characterised in that: the reference generating circuit by
First resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the first triode Q1, the second triode Q2, the three or three
Pole pipe Q3, the tenth PMOS tube PM10, the 11st PMOS tube PM11, the 12nd PMOS tube PM12, the 13rd PMOS tube PM13, the tenth
Four PMOS tube PM14, the 15th PMOS tube PM15, the 14th NMOS tube NM14, the 15th NMOS tube NM15, the 16th NMOS tube
NM16 and the 17th NMOS tube NM17 is constituted；The drain electrode of the source electrode and PM3 pipe of PM10 pipe, the source electrode of PM12 pipe and the source of PM14 pipe
Pole is connected；The grid of PM10 pipe and the grid of PM4 pipe, the grid of PM12 pipe, the grid of PM14 pipe, the drain electrode of PM11 pipe and electricity
One end of resistance R1 is connected；The drain electrode of PM10 pipe is connected with the source electrode of PM11 pipe；The drain electrode of PM12 pipe and the source electrode of PM13 pipe
It is connected；The drain electrode of PM14 pipe is connected with the source electrode of PM15 pipe；The grid of PM11 pipe and the grid of PM5 pipe, the grid of PM13 pipe
The other end of pole, the grid of PM15 pipe, resistance R1 is connected with the drain electrode of NM14 pipe；The drain electrode of PM13 pipe and the one of resistance R2
End, the grid of NM15 pipe are connected with the grid of NM17 pipe；The drain electrode of the other end and NM16 pipe of resistance R2, the grid of NM14 pipe
It is connected with the grid of NM16 pipe；The source electrode of NM14 pipe is connected with the drain electrode of NM15 pipe；The source electrode of NM16 pipe and NM17 pipe
Drain electrode is connected；The source electrode of NM15 pipe is connected with the emitter of triode Q1；One end phase of the source electrode of NM17 pipe and resistance R3
Connection；The other end of resistance R3 is connected with the emitter of triode Q2；The drain electrode of PM15 pipe and the grid and resistance R4 of PM6 pipe
One end be connected, node label B, the output end as reference voltage VBG；The other end of resistance R4 is with triode Q3's
Emitter is connected；The base stage of triode Q1, the collector of Q1, the base stage of Q2, the collector of Q2, the base stage of Q3, the current collection of Q3
Pole is all grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820824999.5U CN208459893U (en) | 2018-05-30 | 2018-05-30 | A kind of reference circuit applied in Internet of Things |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820824999.5U CN208459893U (en) | 2018-05-30 | 2018-05-30 | A kind of reference circuit applied in Internet of Things |
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| Publication Number | Publication Date |
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| CN208459893U true CN208459893U (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820824999.5U Active CN208459893U (en) | 2018-05-30 | 2018-05-30 | A kind of reference circuit applied in Internet of Things |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469870A (en) * | 2018-05-30 | 2018-08-31 | 丹阳恒芯电子有限公司 | A kind of reference circuit applied in Internet of Things |
| TWI789671B (en) * | 2021-01-04 | 2023-01-11 | 紘康科技股份有限公司 | Reference circuit with temperature compensation |
-
2018
- 2018-05-30 CN CN201820824999.5U patent/CN208459893U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469870A (en) * | 2018-05-30 | 2018-08-31 | 丹阳恒芯电子有限公司 | A kind of reference circuit applied in Internet of Things |
| TWI789671B (en) * | 2021-01-04 | 2023-01-11 | 紘康科技股份有限公司 | Reference circuit with temperature compensation |
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