CN104168026A - Sectional type current-steering DAC circuit - Google Patents
Sectional type current-steering DAC circuit Download PDFInfo
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- CN104168026A CN104168026A CN201410421771.8A CN201410421771A CN104168026A CN 104168026 A CN104168026 A CN 104168026A CN 201410421771 A CN201410421771 A CN 201410421771A CN 104168026 A CN104168026 A CN 104168026A
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- 239000004065 semiconductor Substances 0.000 claims description 3
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Abstract
The invention provides a sectional type current-steering DAC circuit, and belongs to the field of integrated circuits. The sectional type current-steering DAC circuit comprises a resistance attenuation network composed of a resistor R0, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6, a switch circuit composed of a switch S0, a switch S1, a switch S2, a switch S3, a switch S4, a switch S5, a switch S6, a switch S7, a switch S8, a switch S9, a switch S10 and a switch S11, and a current source circuit composed of a current source I0, a current source I1, a current source I2, a current source I3, a current source I4, a current source I5, a current source I6, a current source I7, a current source I8, a current source I9, a current source I10 and a current source I11. The sectional type current-steering DAC circuit has the key advantages that a 12-bit current type DAC is sectioned reasonably through the resistance attenuation network, the complex degree of the circuits (the current sources and a decoding circuit) is lowered, the area of a chip is reduced, power dissipation of the chip is lowered, and meanwhile performance of the DAC is improved.
Description
Technical field
The invention belongs to integrated circuit fields, particularly a kind of segmented current steering DAC circuit.
Background technology
DAC is the abbreviation of digital to analog converter.As the bridge that connects digital signal and analog signal, DAC has been widely used in the various fields such as computer, communication now.
The current source DAC structure of extensive use at present has three kinds, is respectively the segmented current source structure that binary weighted current source structure, unit current source type current source structure and this two kinds of structures are combined into.
The common practice of traditional segmented current source structure is that low level adopts binary weighted current source structure to save area, and the high-order unit current source type current source structure that adopts is to improve performance.This segmented current source structure still exists the shortcomings such as complex structure, area is large, power consumption is high.
Summary of the invention
In view of this, the invention provides a kind of segmented current steering DAC circuit, to reduce the area of existing DAC, reduce its power consumption, improve its performance.
A kind of segmented current steering DAC circuit, is characterized in that comprising the current source circuit that the resistance decrement network that is made up of resistance R 0～R6, switching circuit that switch S 0～S11 forms and current source I0～I11 form;
Wherein, resistance R 0 one end ground connection, another terminated nodes A; Resistance R 1 one terminated nodes A, another termination Node B; Resistance R 2 one end ground connection, another termination Node B; Resistance R 3 one termination Node B, another terminated nodes C; Resistance R 4 one end ground connection, another terminated nodes C; Resistance R 5 one terminated nodes C, another termination output VOUT; Resistance R 6 one end ground connection, another termination output VOUT; Current source I0 one end is connected with switch S 0 one end, another termination power vd of current source I0 D, switch S 0 another terminated nodes A; Current source I1 one end is connected with switch S 1 one end, another termination power vd of current source I1 D, switch S 1 another terminated nodes A; Current source I2 one end is connected with switch S 2 one end, another termination power vd of current source I2 D, switch S 2 another terminated nodes A; Current source I3 one end is connected with switch S 3 one end, another termination power vd of current source I3 D, switch S 3 another termination Node B; Current source I4 one end is connected with switch S 4 one end, another termination power vd of current source I4 D, switch S 4 another termination Node B; Current source I5 one end is connected with switch S 5 one end, another termination power vd of current source I5 D, switch S 5 another termination Node B; Current source I6 one end is connected with switch S 6 one end, another termination power vd of current source I6 D, switch S 6 another terminated nodes C; Current source I7 one end is connected with switch S 7 one end, another termination power vd of current source I7 D, switch S 7 another terminated nodes C; Current source I8 one end is connected with switch S 8 one end, another termination power vd of current source I8 D, switch S 8 another terminated nodes C; Current source I9 is connected with switch S 9 one end, another termination power vd of current source I9 D, switch S 9 another termination output VOUT; Current source I10 is connected with switch S 10 one end, another termination power vd of current source I10 D, switch S 10 another termination output VOUT; Current source I11 is connected with switch S 11 one end, another termination power vd of current source I11 D, switch S 11 another termination output VOUT.
Further, described segmented current steering DAC circuit also comprises switching signal generation unit, and described switching signal generation unit is made up of the register being connected successively, decoder and latch; Input signal D0～D11 inputs described switching signal generation unit, the break-make of output switch control signal control switch S0～S11.
Further, described current source I0～I11 size is I0:I1:I2:I3:I4:I5:I6:I7:I8:I9:I10:I11=1:2:4:1:2:4:1:2:4: 1:2:4.
Further, described resistance R 0～R6 size is R0:R1:R2:R3:R4:R5:R6=7:49:8:49:8:49:8.
Further, described switch S 0～S11 is metal-oxide-semiconductor switch.
The major advantage of segmented current steering DAC circuit provided by the invention is to utilize resistance decrement network, current mode DAC is carried out to equitable subsection, reduced the complexity of circuit, reduced the area of chip, reduce the power consumption of chip, can also improve the performance of DAC simultaneously.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is segmented current steering DAC circuit diagram provided by the invention.
The switching signal generation unit electrical block diagram that Fig. 2 provides for the embodiment of the present invention 1.
Embodiment
The invention discloses a kind of segmented current steering DAC circuit, described segmented current steering DAC circuit utilizes resistance decrement network, 12 digit current type DAC are carried out to equitable subsection, reduce the complexity of circuit (current source and decoding circuit), reduce the area of chip, reduce the power consumption of chip, can also improve the performance of DAC simultaneously.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
A kind of segmented current steering DAC circuit, as shown in Figure 1, comprises the current source circuit that the resistance decrement network that is made up of resistance R 0～R6, switching circuit that switch S 0～S11 forms and current source I0～I11 form;
Wherein, resistance R 0 one end ground connection, another terminated nodes A; Resistance R 1 one terminated nodes A, another termination Node B; Resistance R 2 one end ground connection, another termination Node B; Resistance R 3 one termination Node B, another terminated nodes C; Resistance R 4 one end ground connection, another terminated nodes C; Resistance R 5 one terminated nodes C, another termination output VOUT; Resistance R 6 one end ground connection, another termination output VOUT; Current source I0 one end is connected with switch S 0 one end, another termination power vd of current source I0 D, switch S 0 another terminated nodes A; Current source I1 one end is connected with switch S 1 one end, another termination power vd of current source I1 D, switch S 1 another terminated nodes A; Current source I2 one end is connected with switch S 2 one end, another termination power vd of current source I2 D, switch S 2 another terminated nodes A; Current source I3 one end is connected with switch S 3 one end, another termination power vd of current source I3 D, switch S 3 another termination Node B; Current source I4 one end is connected with switch S 4 one end, another termination power vd of current source I4 D, switch S 4 another termination Node B; Current source I5 one end is connected with switch S 5 one end, another termination power vd of current source I5 D, switch S 5 another termination Node B; Current source I6 one end is connected with switch S 6 one end, another termination power vd of current source I6 D, switch S 6 another terminated nodes C; Current source I7 one end is connected with switch S 7 one end, another termination power vd of current source I7 D, switch S 7 another terminated nodes C; Current source I8 one end is connected with switch S 8 one end, another termination power vd of current source I8 D, switch S 8 another terminated nodes C; Current source I9 is connected with switch S 9 one end, another termination power vd of current source I9 D, switch S 9 another termination output VOUT; Current source I10 is connected with switch S 10 one end, another termination power vd of current source I10 D, switch S 10 another termination output VOUT; Current source I11 is connected with switch S 11 one end, another termination power vd of current source I11 D, switch S 11 another termination output VOUT.
As embodiments of the invention, as shown in Figure 2, described segmented current steering DAC circuit also comprises switching signal generation unit, and described switching signal generation unit is made up of the register being connected successively, decoder and latch; Input signal D0～D11 inputs described switching signal generation unit, the break-make of output switch control signal control switch S0～S11.
As embodiments of the invention, described current source I0～I11 size is I0:I1:I2:I3:I4:I5:I6:I7:I8:I9:I10:I11=1:2:4:1:2:4:1:2:4: 1:2:4.
As embodiments of the invention, described resistance R 0～R6 size is R0:R1:R2:R3:R4:R5:R6=7:49:8:49:8:49:8.
As embodiments of the invention, described switch S 0～S11 is metal-oxide-semiconductor switch.
By the above-mentioned setting of described resistance R 0～R6 size and current source I0～I11 size, resistance R 0～R6 has formed the attenuation network of 8 times, and it is 1:8:8 that current source I0, I3, I6, I9 flow into the voltage ratio producing at output point VOUT after resistance decrement network
2: 8
3; And current source I0～I11 size is I0:I1:I2:I3:I4:I5:I6:I7:I8:I9:I10:I11=1:2:4:1:2:4:1:2:4: 1:2:4, this just makes the combination of current source array and resistance decrement network just in time form the DAC of 12, and the voltage ratio that current source I0～I11 produces on output point VOUT is 1:2:2
2: 2
3: 2
4: 2
5: 2
6: 2
7: 2
8: 2
9: 2
10: 2
11.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a segmented current steering DAC circuit, is characterized in that comprising the current source circuit that the resistance decrement network that is made up of resistance R 0 ~ R6, switching circuit that switch S 0 ~ S11 forms and current source I0 ~ I11 form;
Wherein, resistance R 0 one end ground connection, another terminated nodes A; Resistance R 1 one terminated nodes A, another termination Node B; Resistance R 2 one end ground connection, another termination Node B; Resistance R 3 one termination Node B, another terminated nodes C; Resistance R 4 one end ground connection, another terminated nodes C; Resistance R 5 one terminated nodes C, another termination output VOUT; Resistance R 6 one end ground connection, another termination output VOUT; Current source I0 one end is connected with switch S 0 one end, another termination power vd of current source I0 D, switch S 0 another terminated nodes A; Current source I1 one end is connected with switch S 1 one end, another termination power vd of current source I1 D, switch S 1 another terminated nodes A; Current source I2 one end is connected with switch S 2 one end, another termination power vd of current source I2 D, switch S 2 another terminated nodes A; Current source I3 one end is connected with switch S 3 one end, another termination power vd of current source I3 D, switch S 3 another termination Node B; Current source I4 one end is connected with switch S 4 one end, another termination power vd of current source I4 D, switch S 4 another termination Node B; Current source I5 one end is connected with switch S 5 one end, another termination power vd of current source I5 D, switch S 5 another termination Node B; Current source I6 one end is connected with switch S 6 one end, another termination power vd of current source I6 D, switch S 6 another terminated nodes C; Current source I7 one end is connected with switch S 7 one end, another termination power vd of current source I7 D, switch S 7 another terminated nodes C; Current source I8 one end is connected with switch S 8 one end, another termination power vd of current source I8 D, switch S 8 another terminated nodes C; Current source I9 is connected with switch S 9 one end, another termination power vd of current source I9 D, switch S 9 another termination output VOUT; Current source I10 is connected with switch S 10 one end, another termination power vd of current source I10 D, switch S 10 another termination output VOUT; Current source I11 is connected with switch S 11 one end, another termination power vd of current source I11 D, switch S 11 another termination output VOUT.
2. segmented current steering DAC circuit as claimed in claim 1, is characterized in that, also comprises switching signal generation unit, and described switching signal generation unit is made up of the register being connected successively, decoder and latch; Input signal D0 ~ D11 inputs described switching signal generation unit, the break-make of output switch control signal control switch S0 ~ S11.
3. segmented current steering DAC circuit as claimed in claim 1, is characterized in that, described current source I0 ~ I11 size is I0:I1:I2:I3:I4:I5:I6:I7:I8:I9:I10:I11=1:2:4:1:2:4:1:2:4: 1:2:4.
4. segmented current steering DAC circuit as claimed in claim 1, is characterized in that, described resistance R 0 ~ R6 size is R0:R1:R2:R3:R4:R5:R6=7:49:8:49:8:49:8.
5. segmented current steering DAC circuit as claimed in claim 1, is characterized in that, described switch S 0 ~ S11 is metal-oxide-semiconductor switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421771.8A CN104168026B (en) | 2014-08-25 | 2014-08-25 | A kind of segmented current steering DAC circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410421771.8A CN104168026B (en) | 2014-08-25 | 2014-08-25 | A kind of segmented current steering DAC circuit |
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| CN104168026A true CN104168026A (en) | 2014-11-26 |
| CN104168026B CN104168026B (en) | 2017-09-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253906A (en) * | 2015-06-06 | 2016-12-21 | 硅实验室公司 | There is the device for digital-to-analogue conversion and the correlation technique improving performance |
| CN106446416A (en) * | 2016-09-27 | 2017-02-22 | 中国电子科技集团公司第五十八研究所 | Circuit simulation method for segmented current-steering DAC |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060061500A1 (en) * | 2004-09-20 | 2006-03-23 | Analog Devices, Inc. | Digital-to-analog converter structures |
| CN103023506A (en) * | 2013-02-16 | 2013-04-03 | 华东光电集成器件研究所 | DAC (Digital-to-Analog Converter) circuit of segmented current source |
-
2014
- 2014-08-25 CN CN201410421771.8A patent/CN104168026B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060061500A1 (en) * | 2004-09-20 | 2006-03-23 | Analog Devices, Inc. | Digital-to-analog converter structures |
| CN103023506A (en) * | 2013-02-16 | 2013-04-03 | 华东光电集成器件研究所 | DAC (Digital-to-Analog Converter) circuit of segmented current source |
Non-Patent Citations (1)
| Title |
|---|
| 范茂成: "12位分段式电流舵DAC的设计", 《万方数据知识服务平台》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253906A (en) * | 2015-06-06 | 2016-12-21 | 硅实验室公司 | There is the device for digital-to-analogue conversion and the correlation technique improving performance |
| CN106446416A (en) * | 2016-09-27 | 2017-02-22 | 中国电子科技集团公司第五十八研究所 | Circuit simulation method for segmented current-steering DAC |
| CN106446416B (en) * | 2016-09-27 | 2019-07-26 | 中国电子科技集团公司第五十八研究所 | A kind of circuit emulation method applied to segmented current-steering DAC |
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| CN104168026B (en) | 2017-09-15 |
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