WO2024139108A1 - 模数转换装置及方法 - Google Patents
模数转换装置及方法 Download PDFInfo
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- WO2024139108A1 WO2024139108A1 PCT/CN2023/102897 CN2023102897W WO2024139108A1 WO 2024139108 A1 WO2024139108 A1 WO 2024139108A1 CN 2023102897 W CN2023102897 W CN 2023102897W WO 2024139108 A1 WO2024139108 A1 WO 2024139108A1
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- WIPO (PCT)
- Prior art keywords
- analog
- digital
- digital converters
- sar
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/002—Provisions or arrangements for saving power, e.g. by allowing a sleep mode, using lower supply voltage for downstream stages, using multiple clock domains or by selectively turning on stages when needed
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
- H03M1/16—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit with scale factor modification, i.e. by changing the amplification between the steps
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/1205—Multiplexed conversion systems
- H03M1/121—Interleaved, i.e. using multiple converters or converter parts for one channel
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/1205—Multiplexed conversion systems
- H03M1/121—Interleaved, i.e. using multiple converters or converter parts for one channel
- H03M1/1215—Interleaved, i.e. using multiple converters or converter parts for one channel using time-division multiplexing
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/34—Analogue value compared with reference values
- H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
- H03M1/46—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter
- H03M1/466—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter using switched capacitors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/34—Analogue value compared with reference values
- H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
- H03M1/46—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter
- H03M1/466—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter using switched capacitors
- H03M1/468—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter using switched capacitors in which the input S/H circuit is merged with the feedback DAC array
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/50—Analogue/digital converters with intermediate conversion to time interval
- H03M1/56—Input signal compared with linear ramp
Definitions
- N is greater than 1
- M is greater than 1
- the output ends of the N SAR analog-to-digital converters are connected one by one to the input ends of the inter-stage gain module
- the output ends of the inter-stage gain module are connected one by one to the input ends of the M ramp analog-to-digital converters to form a third sampling channel.
- Step S604 obtaining a quantization residual of the SAR analog-to-digital converter according to the completed successive approximation analog-to-digital conversion signal and the analog voltage signal, and obtaining a first quantization output signal;
- Step S606 the quantized residual enters the ramp analog-to-digital converter through the inter-stage gain module, and the ramp analog-to-digital converter compares and processes the quantized residual according to the timing information to obtain a second quantized output signal;
- SAR ADC Slope ADC
- Pipeline ADC the advantages of SAR ADC, Slope ADC and Pipeline ADC are absorbed to form a new type of analog-to-digital converter architecture.
- SAR ADC and Slope ADC are cascaded, with the front stage being SAR ADC, which takes advantage of its high speed and low power consumption, and can obtain the quantized residual by successive approximation, and the back stage being Slope ADC, which takes advantage of its simple structure, and there is an optional interstage amplification module between the two stages to set a specific interstage gain to scale the front stage residual.
- group C SAR ADCs
- group L Slope ADCs
- L, K, and C are all positive integers.
- the front stage uses a single SAR ADC, and the back stage uses several (L groups) Slope ADCs that work in time interleaving, forming a cascade connection.
- a single SAR ADC and a single Slope ADC are cascaded, with the SAR ADC as the front stage and the Slope ADC as the back stage.
- An inter-stage amplification module is optional.
- the amplification module can be used as a channel to expand the time-interleaved operation to several channels (K groups).
- the front stage is composed of several groups (Group C) of SAR ADCs
- the back stage is composed of several groups (Group L) of Slope ADCs.
- the front and back stages form a cascade connection and perform time interleaving.
- the two-stage structure of SAR-Slope ADC is expanded into sar(several stages of SAR ADC)-Slope(1st stage Slope ADC), x(several stages of other ADCs with available residuals)-SAR(several stages of SAR ADC)-Slope(1st stage Slope ADC), SAR(several stages of SAR ADC)-x(several stages of other ADCs with available residuals)-Slope(1st stage Slope ADC).
- the second stage After the SAR ADC obtains the residual, it samples the residual (after an optional interstage gain module) to the subsequent M-bit slope ADC, keeps the signal, and compares it with the specified slope signal under the control of the clock (clock_slope) to obtain the quantized output of the slope ADC (M-bit effective digital code).
- This process can be serial or parallel with the first stage.
- the third stage align the timing of the N-bit effective digital code of the previous stage and the M-bit effective digital code of the next stage according to the relationship between the inter-stage gains, and encode and output;
- the fourth stage If time interleaving is involved, align the N-bit effective digital code of the previous stage and the M-bit effective digital code of the next stage according to the timing relationship, and encode and output according to the relationship between the inter-stage gains. If time interleaving is not performed, there is no such stage.
- the low level indicates the sampling stage of the first channel, and the high level indicates the quantization stage of the first channel
- Q indicates the quantization stage of the first channel
- S indicates the sampling stage of the first channel
- the Process(ch K) signal and clk(ch K) correspond to the Kth channel
- S indicates the sampling stage
- Q indicates the quantization stage.
- the timing within the channel refers to the optimal solution 1. Time coordination requires that the sampling time of a single channel is not higher than 1/K of the conversion time of each channel.
- FIG11 is a diagram of a scenario embodiment according to the present disclosure.
- the structural schematic diagram of the analog-to-digital conversion device is shown in Figure 11.
- the recommended configuration is: the quantization accuracy of the front-stage SAR and the back-stage slope is N>M, and the number of channels is C ⁇ L; it is suitable for high-speed and high-precision application scenarios (8 ⁇ 14bit, 1xGS/s).
- the recommended configuration does not represent the only configuration, and different configurations under the same or similar architecture are also within the technical protection scope of the embodiments of the present disclosure.
- Other alternative or expandable types described in the specific schemes (4) and (5) of scenario embodiment one are also within the technical protection scope of the embodiments of the present disclosure.
- the layout can be divided into two parts, one of which has a large-area symmetrical and regular capacitor (metal layer), accompanied by a symmetrical and compact transistor device circuit (polysilicon, metal wires, etc.) nearby; the other part also has a large-area capacitor (metal layer), accompanied by a transistor device circuit (polysilicon, metal wires, etc.) with a small area nearby, which should also be within the protection scope of the embodiments of the present disclosure.
- metal layer symmetrical and regular capacitor
- transistor device circuit polysilicon, metal wires, etc.
- the analog-to-digital conversion device has the following effects: it combines the advantages of sar ADC, slope ADC, and pipeline ADC, splits an ADC into several sections, one part is processed in sar ADC, and the other part is processed in slope ADC, and quantized in parallel or serially.
- the final quantization results of the two types of ADCs are encoded and outputted to obtain a complete ADC output result.
- the front stage uses sar ADC, which takes advantage of its high energy efficiency ratio and high speed characteristics, because sar ADC is particularly suitable for fast conversion of medium precision, and it is easy to obtain quantized residuals after the conversion is completed.
- the residual of the front stage is sampled to the slope ADC of the back stage through an optional inter-stage gain.
- the idle time after the sar ADC conversion can be used, and the back stage works serially or in parallel to improve the time utilization (typically increasing the rate by 2 times).
- the back stage uses slope ADC, which has a simple structure and is suitable for multi-channel expansion to form time interleaving work.
- the disclosed embodiments are not a simple superposition of SAR ADC, slope ADC, and pipeline ADC, but a sophisticated combination of structure and timing to form a new type of analog-to-digital converter architecture, achieving high-speed and high-precision analog-to-digital conversion characteristics.
- the analog-to-digital converter technology provided by the embodiment of the present disclosure can convert analog signals into digital signals. Possible applications include but are not limited to: signal base stations, mobile phone communications, wifi, bluetooth, optical communications, precision measuring instruments, sensor systems, automobiles, radars, underwater acoustics, etc.
- the technical solution of the embodiment of the present disclosure can realize high-speed/ultra-high-speed analog-to-digital converters, and can also realize high-/low-speed high-/low-precision analog-to-digital converters, that is, compatible with the previous low-precision and low-speed directions. It can also be used to solve the problems that affect the accuracy, such as the matching and noise of sar ADC and slope ADC, and is compatible with the realization of ultra-high-precision analog-to-digital converters.
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
Description
Claims (10)
- 一种模数转换装置,包括:模数转换器,其中,所述模数转换器包括N个逐次逼近型SAR模数转换器、M个斜坡模数转换器,其中,N为大于或者等于1的正整数,M为大于1的正整数;所述N个SAR模数转换器的输出端与所述M个斜坡模数转换器的输入端连接。
- 根据权利要求1所述的装置,其中,所述模数转换器还包括:级间增益模块,所述N个SAR模数转换器的输出端连接至所述级间增益模块的输入端,所述级间增益模块的输出端连接至所述M个斜坡模数转换器的输入端。
- 根据权利要求1所述的装置,其中,N等于1,M大于1,一个所述SAR模数转换器的输出端连接级间增益模块的输入端,所述级间增益模块的输出端分别连接M个所述斜坡模数转换器的输入端。
- 根据权利要求1所述的装置,其中,N大于1,M大于1,且M是N的k倍,k为大于1的整数,其中N个SAR模数转换器中的每个SAR模数转换器连接至一级间增益模块的输入端,该级间增益模块的输出端连接至M个斜坡模数转换器中对应的k个斜坡模数转换器的输入端,形成一个第一采样通道,从而形成N个并联的所述第一采样通道。
- 根据权利要求1所述的装置,其中,N大于1,M大于1,且N等于M,N个所述SAR模数转换器中的每个所述SAR模数转换器的输出端分别连接所述级间增益模块的输入端,所述级间增益模块的输出端分别连接至M个所述斜坡模数转换器中的每个所述斜坡模数转换器的输入端,使得每个所述SAR模数转换器与一个对应的SAR模数转换器形成一个第二采样通道,以形成N个并联的所述第二采样通道。
- 根据权利要求1所述的装置,其中,N大于1,M大于1,N个所述SAR模数转换器的输出端逐一连接所述级间增益模块的输入端,所述级间增益模块的输出端逐一对应连接M个所述斜坡模数转换器的输入端,以形成一个第三采样通道。
- 根据权利要求2所述的装置,其中,还包括:多个第一模数转换器,其中,所述第一模数转换器设置为获取量化残差;多个所述第一模数转化器的输出端连接至所述N个SAR模数转换器的输入端,所述N个SAR模数转换器的输入端连接至级间增益模块的输入端,所述级间增益模块的输出端连接至所述M个斜坡模数转换器的输入端;或者,所述N个SAR模数转换器的输入端连接至多个所述第一模数转化器的输入端,多个所述第一模数转化器的输出端连接至所述级间增益模块的输入端,所述级间增益模块的输出端连接至所述M个斜坡模数转换器的输入端。
- 根据权利要求1所述的装置,其中,还包括:时序控制模块,设置为向所述模数转换装置提供时序信息;对齐编码模块,设置为根据所述时序信息,对所述SAR模数转换器输出的第一量化输出 信号和所述斜坡模数转换器输出的第二量化输出信号,进行时序对齐并编码输出。
- 根据权利要求1所述的装置,其中,还包括:参考电平模块,设置为向所述模数转换装置提供参考电平;电源模块,设置为向所述模数转换装置提供电源。
- 一种模数转换方法,采用权利要求1-9任一所述的模数转换装置实现,包括:所述SAR模数转换器采集模拟电压信号,并根据时序信息对所述模拟电压信号进行逐次逼近模数转换;根据完成逐次逼近模数转换信号与所述模拟电压信号,获得所述SAR模数转换器的量化残差,并获得第一量化输出信号;所述量化残差经过所述级间增益模块进入所述斜坡模数转换器,所述斜坡模数转换器根据所述时序信息对所述量化残差进行比较处理,获得第二量化输出信号;对齐编码模块根据所述时序信息将所述第一量化输出信号和所述第二量化输出信号对齐,并根据级间增益关系对所述第一量化输出信号和所述第二量化输出信号进行编码输出。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23909053.3A EP4601199A4 (en) | 2022-12-31 | 2023-06-27 | ANALOG-TO-DIGITAL CONVERSION DEVICE AND METHOD |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211735587.1 | 2022-12-31 | ||
| CN202211735587.1A CN118282395A (zh) | 2022-12-31 | 2022-12-31 | 模数转换装置及方法 |
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| Publication Number | Publication Date |
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| WO2024139108A1 true WO2024139108A1 (zh) | 2024-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/CN2023/102897 Ceased WO2024139108A1 (zh) | 2022-12-31 | 2023-06-27 | 模数转换装置及方法 |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4601199A4 (zh) |
| CN (1) | CN118282395A (zh) |
| WO (1) | WO2024139108A1 (zh) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120074521A (zh) * | 2025-01-15 | 2025-05-30 | 西安电子科技大学 | 基于时间域模数转换器的单通道混合域流水线模数转换器 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888141A (zh) * | 2014-04-09 | 2014-06-25 | 华为技术有限公司 | 流水线逐次比较模数转换器的自校准方法和装置 |
| CN104320141A (zh) * | 2014-10-21 | 2015-01-28 | 华南理工大学 | 一种低功耗12位流水线式逐次逼近模数转换器 |
| CN111464186A (zh) * | 2020-04-28 | 2020-07-28 | 合肥工业大学 | 一种高速Pipeline-SAR型的模数转换电路 |
| CN114978165A (zh) * | 2022-06-08 | 2022-08-30 | 上海交通大学 | 时间交织流水线逐次逼近模数转换器 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8471751B2 (en) * | 2011-06-30 | 2013-06-25 | Intel Corporation | Two-stage analog-to-digital converter using SAR and TDC |
| US11784653B2 (en) * | 2020-10-28 | 2023-10-10 | Digital Analog Integration, Inc. | Hybrid analog-to-digital converter |
-
2022
- 2022-12-31 CN CN202211735587.1A patent/CN118282395A/zh active Pending
-
2023
- 2023-06-27 WO PCT/CN2023/102897 patent/WO2024139108A1/zh not_active Ceased
- 2023-06-27 EP EP23909053.3A patent/EP4601199A4/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888141A (zh) * | 2014-04-09 | 2014-06-25 | 华为技术有限公司 | 流水线逐次比较模数转换器的自校准方法和装置 |
| CN104320141A (zh) * | 2014-10-21 | 2015-01-28 | 华南理工大学 | 一种低功耗12位流水线式逐次逼近模数转换器 |
| CN111464186A (zh) * | 2020-04-28 | 2020-07-28 | 合肥工业大学 | 一种高速Pipeline-SAR型的模数转换电路 |
| CN114978165A (zh) * | 2022-06-08 | 2022-08-30 | 上海交通大学 | 时间交织流水线逐次逼近模数转换器 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4601199A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4601199A1 (en) | 2025-08-13 |
| EP4601199A4 (en) | 2026-01-14 |
| CN118282395A (zh) | 2024-07-02 |
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