CN106027023A - Voltage division circuit outputting constant impedance - Google Patents
Voltage division circuit outputting constant impedance Download PDFInfo
- Publication number
- CN106027023A CN106027023A CN201610303806.7A CN201610303806A CN106027023A CN 106027023 A CN106027023 A CN 106027023A CN 201610303806 A CN201610303806 A CN 201610303806A CN 106027023 A CN106027023 A CN 106027023A
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- China
- Prior art keywords
- resistance
- bleeder circuit
- voltage
- equal
- voltage division
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0005—Modifications of input or output impedance
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a voltage division circuit outputting constant impedance. According to the invention, in a manner of substituting resistors with a circuit, output impedance of the voltage division circuit can be constant, such method is relatively simple to realize, and can be realized just by forming that three resistors in the circuit satisfy a certain relationship. Moreover, output voltage of the voltage division circuit can be obtained quickly.
Description
Technical field
The present invention relates to electronic technology field, be specifically related to a kind of bleeder circuit exporting constant impedance.
Background technology
At electronic technology field, bleeder circuit is a kind of very important basic element circuit, is widely used in
Output signal regulation, gain control etc..
The most common bleeder circuit is the mode using resistant series dividing potential drop, as shown in Figure 1.This
Dividing potential drop mode is simple, but when adopt in this way voltage is carried out Multilevel partial-pressure when, its output impedance is not
For steady state value.As in Fig. 1, A point output resistance is 2R, and B point output resistance is R.
Summary of the invention
In view of this, the invention provides a kind of bleeder circuit exporting constant impedance, it is possible to realize equal proportion
The output constant impedance of bleeder circuit.
A kind of bleeder circuit exporting constant impedance, if n level bleeder circuit, including voltage input end, ground connection
End and 2n resistance;
Wherein, 2n resistance by a resistance equal to the resistance Z of R0, n resistance be equal to the resistance Z of R11With
N-1 resistance is equal to the resistance Z of R22Constitute;And
Voltage input end is sequentially connected in series n resistance Z1After, then by resistance Z0Ground connection;Adjacent resistor Z1Between,
By a resistance Z2It is connected to ground;Adjacent resistor Z1Between common port and resistance Z1With resistance Z0Between
Common port, respectively as the outfan of bleeder circuit, and output end voltage is Vi=ki× V, wherein, i generation
Table level number, i=(1,2 ..., n) wherein, k is dividing potential drop coefficient,During use, according to required electricity
Pressure, selects corresponding outfan.
Beneficial effect:
The present invention is by the way of using circuit to replace resistance so that the output constant impedance of bleeder circuit, this
The method of kind realizes relatively simple, it is only necessary to constituting in this circuit three resistor satisfied certain relations can realize.
And can quickly obtain the output voltage of bleeder circuit.
Accompanying drawing explanation
Fig. 1 is prior art resistant series bleeder circuit.
Fig. 2 is one-level bleeder circuit in the present invention.
Fig. 3 is the alternate figures of resistance R in the present invention.
Fig. 4 is two grades of bleeder circuits in the present invention.
Fig. 5 is bleeder circuit figure of the present invention.
Fig. 6 is embodiment bleeder circuit figure in the present invention.
Detailed description of the invention
Develop simultaneously embodiment below in conjunction with the accompanying drawings, describes the present invention.
The invention provides a kind of bleeder circuit exporting constant impedance;Its main thought is: such as Fig. 2 institute
The bleeder circuit figure that one-level ratio is k shown;Between voltage input end and ground, series resistance Z0And Z,
Its resistance value is respectively R and R1, then at resistance Z and Z0Between the dividing potential drop coefficient k of output terminals A be then:
The voltage V of outfanAIt is multiplied by dividing potential drop coefficient for input voltage:
Wherein, V is input electricity;
Now, the output impedance of input A is R;
When needs realize two grades of dividing potential drops, in order to ensure that output impedance is constant, resistance R is entered by the present invention
Go deformation as shown in Figure 3;As shown in Figure 4, resistance is the resistance Z of R0' and resistance be the resistance Z of R13
Two ends, resistance in parallel is the resistance Z of R22, and
It is to say, use circuit as shown in Figure 3, replacing resistance in Fig. 2 is the resistance Z of R0', formed
Fig. 4;This have the advantage that: in the bleeder circuit after replacement, resistance Z0' and Z3Between outfan B
Output impedance be still R;The voltage V of outfan B nowBFor:
VB=k × k × V
To sum up, when needs realize n level dividing potential drop, then according to above-mentioned theory, by the resistance in n-1 level bleeder circuit
After the resistance that resistant series resistance is R1 that resistance resistance is R that value is R, then in its two ends parallel connection resistance
For the resistance of R2, andAnd to keep resistance be R resistance one end ground connection.
Specifically: as it is shown in figure 5,
If n level bleeder circuit, including voltage input end, earth terminal and 2n resistance;
Wherein, 2n resistance by a resistance equal to the resistance Z of R0, n resistance be equal to the resistance Z of R11With
N-1 resistance is equal to the resistance Z of R22Constitute;Voltage input end is sequentially connected in series n resistance Z1After, then pass through
Resistance Z0Ground connection;Adjacent resistor Z1Between, by a resistance Z2It is connected to ground;Adjacent resistor Z1Between
Common port and resistance Z1With resistance Z0Between common port, respectively as the outfan of bleeder circuit
Relation between resistance R1, R2 and R is:
And:
Wherein,
K is dividing potential drop coefficient;
Now, the output voltage of the n-th step voltage outfan is:
Vi=ki×V
Wherein, i represents progression, and i=(1,2 ..., n);During use, according to required voltage, select the most defeated
Go out end.
Embodiment:
The constituted mode of circuit is: as shown in Figure 6:
1. resistance Z0、Z2、Z4End points 1 ground connection;
2. resistance Z1End points 1 and resistance Z0End points 2 connects, resistance Z1End points 2 and resistance Z2End points 2 is even
Connect;Resistance Z3End points 1 and resistance Z1End points 2 connects, resistance Z3End points 2 and resistance Z4End points 2 connects
3. resistance Z5End points 1 and resistance Z4End points 2 connects, resistance Z5End points 2 is as voltage input end.
By this connected mode, constitute circuit diagram as shown in Figure 5.Then in this circuit, tri-end points of A, B, C divide
It is not the 1st, 2,3 step voltage outfans.
According to each resistance relation, can calculate the impedance between A end points and earth terminal is R, output
Voltage is VA=V*R/ (R+R1)=V*k;Can calculate B end points output voltage further is
VB=VA* R/ (R+R1)=V*k2;C end points output voltage is VC=VB* R/ (R+R1)=V*k3;And output impedance
It is equal to R.
In sum, these are only presently preferred embodiments of the present invention, be not intended to limit the guarantor of the present invention
Protect scope.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made,
Should be included within the scope of the present invention.
Claims (1)
1. the bleeder circuit exporting constant impedance, it is characterised in that set n level bleeder circuit, including electricity
Pressure input, earth terminal and 2n resistance;
Wherein, 2n resistance by a resistance equal to the resistance Z of R0, n resistance be equal to the resistance Z of R11With
N-1 resistance is equal to the resistance Z of R22Constitute;And
Voltage input end is sequentially connected in series n resistance Z1After, then by resistance Z0Ground connection;Adjacent resistor Z1Between,
By a resistance Z2It is connected to ground;Adjacent resistor Z1Between common port and resistance Z1With resistance Z0Between
Common port, respectively as the outfan of bleeder circuit, and output end voltage is Vi=ki× V, wherein, i generation
Table level number, i=(1,2 ..., n) wherein, k is dividing potential drop coefficient,During use, according to required electricity
Pressure, selects corresponding outfan.
Priority Applications (1)
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CN201610303806.7A CN106027023A (en) | 2016-05-10 | 2016-05-10 | Voltage division circuit outputting constant impedance |
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CN201610303806.7A CN106027023A (en) | 2016-05-10 | 2016-05-10 | Voltage division circuit outputting constant impedance |
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CN201610303806.7A Pending CN106027023A (en) | 2016-05-10 | 2016-05-10 | Voltage division circuit outputting constant impedance |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110398519A (en) * | 2019-08-26 | 2019-11-01 | 广西玉柴机器集团有限公司 | A kind of three array NOx sensor measuring circuits |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6154060A (en) * | 1998-06-03 | 2000-11-28 | Intel Corporation | Signaling circuit with substantially constant output impedance |
US6236255B1 (en) * | 1997-11-27 | 2001-05-22 | Nec Corporation | Output impedance adjustment circuit |
CN1422132A (en) * | 2000-02-03 | 2003-06-04 | 奥特控制有限公司 | Indicator for liquid heating appliances |
CN1514540A (en) * | 2002-11-12 | 2004-07-21 | Lg电子株式会社 | Variable attenuator system and method |
-
2016
- 2016-05-10 CN CN201610303806.7A patent/CN106027023A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6236255B1 (en) * | 1997-11-27 | 2001-05-22 | Nec Corporation | Output impedance adjustment circuit |
US6154060A (en) * | 1998-06-03 | 2000-11-28 | Intel Corporation | Signaling circuit with substantially constant output impedance |
CN1422132A (en) * | 2000-02-03 | 2003-06-04 | 奥特控制有限公司 | Indicator for liquid heating appliances |
CN1514540A (en) * | 2002-11-12 | 2004-07-21 | Lg电子株式会社 | Variable attenuator system and method |
Non-Patent Citations (3)
Title |
---|
孙骆生: "《电工学基本教程(第三版)》", 31 July 2003 * |
孙骆生: "《电工学基本教程(第二版)》", 30 September 1990 * |
武治华等: "《简明电工学》", 31 May 1992 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110398519A (en) * | 2019-08-26 | 2019-11-01 | 广西玉柴机器集团有限公司 | A kind of three array NOx sensor measuring circuits |
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Application publication date: 20161012 |
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