CN103001493B - Simple linear power source circuit - Google Patents
Simple linear power source circuit Download PDFInfo
- Publication number
- CN103001493B CN103001493B CN201210431740.1A CN201210431740A CN103001493B CN 103001493 B CN103001493 B CN 103001493B CN 201210431740 A CN201210431740 A CN 201210431740A CN 103001493 B CN103001493 B CN 103001493B
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- China
- Prior art keywords
- pmos
- manages
- pipe
- resistance
- nmos
- Prior art date
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Abstract
The invention discloses a simple linear power source circuit. The simple linear power source circuit generates current via threshold voltage of an active device, the current is adopted as reference current of the circuit, namely the reference current is generated by bootstrap reference and the MOS (metal oxide semiconductor) threshold voltage is used as reference voltage, and a simple linear power source is realized by combining with a feedback principle, and the power source is free of affection from a system power source VDD (voltage drain drain).
Description
Technical field
The present invention relates generally to the design field of power circuit, refers in particular to a kind of simple linear power supply circuit.
Background technology
For analog integrated circuit, the quality of its performance depends on several factors, wherein the quality of power supply is also a key factor that affects analog integrated circuit performance, particularly some high-precision analog circuit, as high-precision adc (ADC), high precision digital-to-analog converter (DAC), instrument amplifier etc., this class circuit all needs a high-quality Power supply conventionally, conventionally be all to adopt linear power supply (LDO), LDO converts a bad power supply signal of performance to performance power supply output relatively preferably, the performance of LDO is conventionally all fine, but the area taking is also larger, for some simple modules, or the circuit module that scale is less, and not again in extra high situation to the performance requirement of power supply, LDO is not a wise selection.
Summary of the invention
The problem to be solved in the present invention is just: the technical problem existing for prior art, proposes a kind of simple linear power supply circuit.
The solution that the present invention proposes is: this circuit is by the threshold voltage generation current of active device, and adopt the reference current of this electric current as circuit, produce reference current with bootstrapping benchmark, with metal-oxide-semiconductor threshold voltage as with reference to voltage, realized a simple linear power supply in conjunction with negative-feedback principle again, this power supply is not subject to the impact of system power supply VDD.
Brief description of the drawings
Fig. 1 is circuit theory schematic diagram of the present invention;
Embodiment
Below with reference to accompanying drawing and concrete enforcement, the present invention is described in further details.
As shown in Figure 1, PMOS pipe M
3the diode form that is grid leak short circuit connects, and its source voltage is M
3threshold voltage, suppose that it is V
tH3, this threshold voltage is managed M as PMOS
8gate bias voltage, NMOS manages M
10grid voltage be always M
10threshold voltage, suppose that it is V
tH10, PMOS manages M
4, M
5size identical, NMOS manages M
9, M
10size also identical, M
9and M
10leakage current I
dSequate i.e. I
dS9=I
dS10, I
dS10m flows through
10produce voltage V
gS10, I
dS9r flows through
2produce voltage I
dS9r
2, these two voltages are same voltage,
Wherein
suppose I
dS9=I
dS10=I
q, through type (1) can draw
Can find out I from formula (2)
qirrelevant with power vd D.
Resistance R
3resistance be resistance R
2half, NMOS manages M
9and M
10size just the same, flow through NMOS pipe M
11electric current I
dS11=I
q, reach the balance of circuit, PMOS pipe M
8leakage current also equal I
q,
I
Q=K
p(V
O-|V
TH3|-|V
TH8|)
2(3)
Wherein V
tH8pMOS pipe M
8threshold voltage,
through type (2) and formula (3) can obtain the value of output voltage,
Can be found out output voltage V by formula (4)
oirrelevant with supply voltage VDD, only and technological parameter and the resistance R of metal-oxide-semiconductor
2relevant, its concrete value can be by adjusting metal-oxide-semiconductor size and resistance R
2resistance change.
As shown in Figure 1, resistance R
lit is load.Suppose M
11source voltage be V
pif, load R
lreduce, i.e. I
lincrease V
oreduce I
dS8reduce V
preduce, because I
dS11=I
qsteady state value, therefore M
11drain-source voltage V
dSreduce, i.e. PMOS pipe M
7v
gSincrease, output driving current increases, compensation I
l, keep V
oconstant; Together should load R
lwhen increase, i.e. I
lreduce, V
oincrease I
dS8increase V
praise, because I
dS11=I
qsteady state value, therefore M
11drain-source voltage V
dSincrease, i.e. PMOS pipe M
7v
gSreduce, output driving current reduces, compensation I
l, keep V
oconstant.
In sum, this circuit produces reference current with bootstrapping benchmark, has realized a simple linear power supply in conjunction with negative-feedback principle, and this power supply is not subject to the impact of system power supply VDD.
Claims (1)
1. a simple linear power supply circuit, is characterized in that:
Circuit is managed M by PMOS
1, PMOS manages M
2, PMOS manages M
3, PMOS manages M
4, PMOS manages M
5, PMOS manages M
6, PMOS manages M
7, PMOS manages M
8, NMOS manages M
9, NMOS manages M
10, NMOS manages M
11, resistance R
1, resistance R
2and resistance R
3composition; System power supply VDD is connected to PMOS pipe M
1, M
4, M
5, M
6and M
7source electrode, earth signal GND is connected to PMOS pipe M
3grid and drain electrode, resistance R
2one end, resistance R
3one end and NMOS pipe M
10source electrode; Resistance R
1one end be connected to PMOS pipe M
1drain electrode, the other end is connected to PMOS pipe M
4, PMOS manages M
5with PMOS pipe M
6grid and PMOS pipe M
2source electrode, PMOS manages M
2drain electrode is connected to PMOS pipe M
3source electrode and PMOS pipe M
8grid, PMOS manages M
2grid is connected to PMOS pipe M
1grid, PMOS manage M
4drain electrode and NMOS pipe M
9drain electrode; NMOS manages M
9source electrode be connected to resistance R
2the other end and NMOS pipe M
10grid, NMOS manages M
9grid is connected to NMOS pipe M
10drain electrode, NMOS manage M
11grid and PMOS pipe M
5drain electrode; PMOS manages M
6drain electrode is connected to PMOS pipe M
7grid and NMOS pipe M
11drain electrode, NMOS manages M
11source electrode be connected to PMOS pipe M
8drain electrode and resistance R
3the other end, PMOS manages M
7drain electrode and PMOS pipe M
8source electrode links together and forms the output V of linear power supply
o; Wherein PMOS pipe M
4, M
5size identical, NMOS manages M
9, M
10size also identical, resistance R
3resistance be resistance R
2half.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210431740.1A CN103001493B (en) | 2012-11-02 | 2012-11-02 | Simple linear power source circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210431740.1A CN103001493B (en) | 2012-11-02 | 2012-11-02 | Simple linear power source circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
CN103001493A CN103001493A (en) | 2013-03-27 |
CN103001493B true CN103001493B (en) | 2014-08-13 |
Family
ID=47929730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201210431740.1A Active CN103001493B (en) | 2012-11-02 | 2012-11-02 | Simple linear power source circuit |
Country Status (1)
Country | Link |
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CN (1) | CN103001493B (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101571728A (en) * | 2009-06-09 | 2009-11-04 | 中国人民解放军国防科学技术大学 | Non-bandgap high-precision reference voltage source |
CN102662427A (en) * | 2012-05-25 | 2012-09-12 | 中国科学院微电子研究所 | Voltage source circuit |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4034126B2 (en) * | 2002-06-07 | 2008-01-16 | Necエレクトロニクス株式会社 | Reference voltage circuit |
TW200928648A (en) * | 2007-12-20 | 2009-07-01 | Airoha Tech Corp | Voltage reference circuit |
-
2012
- 2012-11-02 CN CN201210431740.1A patent/CN103001493B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101571728A (en) * | 2009-06-09 | 2009-11-04 | 中国人民解放军国防科学技术大学 | Non-bandgap high-precision reference voltage source |
CN102662427A (en) * | 2012-05-25 | 2012-09-12 | 中国科学院微电子研究所 | Voltage source circuit |
Also Published As
Publication number | Publication date |
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CN103001493A (en) | 2013-03-27 |
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