10 Bits 100MS/s DAC for IEEE 802.11a

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10 Bits 100MS/s Digital to Analog Converter for IEEE 802.11a


10 Bits 100MS/s Digital to Analog Converter
for IEEE 802.11a
student：Liang Chuchen Advisors：Dr. Lan-Rong Dung
Degree Program of Electrical Engineering Computer Science
National Chiao Tung University
ABSTRACT
This thesis describes a 10-bit 100MS/s digital to analog converter (DAC) for
IEEE 802.11a. For high-speed application, The current-source mode has been
popular in high speed digital to analog converter applications. However, to
obtain accurate current-source is not easy due to process variation. Although
several calibration circuits are proposed to improve the accuracy, the cost and
circuit complexity are usually very large. In this thesis, based on traditional
threshold-voltage compensation method, we use a new current source biasing
technique to reduce the current error caused by inevitable threshold-voltage
variation, transistor (w/l) size variation, power-source variation and temperature
change. Finally we apply this technique to 10-bit weighted-current-source digital
to analog converter. SPICE simulations show that for 0.35-μm TSMC Mixed
Signal 2P4M process with a 3.3 V power supply; the digital to analog converter
variation is reduced significantly.

目錄

中文摘要.................................................................................................................................................................I

ENGLISH ABSTRACT ...................................................................................................................................... II

志谢..................................................................................................................................................................... III

目錄......................................................................................................................................................................IV

表目錄......................................................................................................................................................................... VII

图目錄...............................................................................................................................................................VIII

第一章 绪論..................................................................................................................................................... 1

1.1 简介..................................................................................................................................................... 1

1.2 研究动机............................................................................................................................................. 2

1.3 論文组织............................................................................................................................................. 3

第二章
數位/類比转换器原理....................................................................................................................... 4

2.1 數位/類比转换器(DAC) ...................................................................................................................... 4

2.2 理想數位/類比转换器(IDEAL DAC) .................................................................................................... 4

2.3 數位/類比转换器(DAC)规格參數...................................................................................................... 5

2.3.1
解析度(Resolution) ..................................................................................................................... 5

2.3.2
偏移误差(Offset error) ............................................................................................................. 5

2.3.3
增益误差(Gain error) ................................................................................................................. 6

2.3.4
精确度(Accuracy) ......................................................................................................................... 7

2.3.5
累积非线性误差(Integral nonlinearity error INL)............................................................ 7

2.3.6
差动非线性误差(differential nonlinearity error DNL).................................................... 8

2.3.7
稳定时间(settling time) ........................................................................................................... 8

2.3.8
转换率(Conversion rate ) ......................................................................................................... 8

2.3.9
单调增加特性( Monotonicity ) ................................................................................................. 8

2.4 數位類比转换器基本架构............................................................................................................. 9

2.4.1
电阻串列式數位/類比转换器(Resistor-String DAC).............................................................. 9

2.4.2
兩级电阻式數位/類比转换器(2-STAGE RESISTOR-STRING DAC) ................................................... 10

2.4.3
权重电阻式數位/類比转换器(BINARY-WEIGHTED RESISTOR DAC) .................................................. 10

2.4.4
R-2R 电阻梯式數位/類比转换器(R-2R ladders DAC)............................................................. 11

2.4.5
电容电荷重新分布式數位/類比转换器(CHARGE-REDISTRIBUTION SWITCHED-CAPACITOR DAC) ........ 12

2.4.6
二进制代码权重电流切换式數位/類比转换器.............................................................................. 14

2.4.7
温度计码电流切换式數位/類比转换器(CURRENT MODE THERMOMETER CODE DAC) .......................... 16

2.4.8
温度计码与二进制权重码共享的区段式电流源數位/類比转换器.......................................... 18

2.4.9
超取样频率數位/類比转换器(OVERSAMPLING DAC) ...................................................................... 21

第三章
切换电流源式數位/類比转换器电路设计...................................................................................... 27

3.1 12 BIT 數位/類比转换器规格........................................................................................................... 27

3.2 12-BIT 數位/類比转换器电路.......................................................................................................... 28

3.2.1 12-bit 數位/類比转换器电路架构............................................................................................ 28

3.2.2 电流源电路—抗制程变因的偏压电流源技术............................................................................ 29

3.2.3 差动式切换开关驱动控制电路................................................................................................... 30

3.2.4 减少开关切换所产生突波对DAC 输出影响................................................................................ 32

3.2.5 电流源电路—增加电流源输出阻抗技术................................................................................... 35

3.2.6 电流源gradient error 问题解决技术.................................................................................... 35

3.2.7 二进码转温度计码编码电路....................................................................................................... 38

3.2.8 完整电路...................................................................................................................................... 41

3.3 电路模拟结果............................................................................................................................... 42

第四章 芯片布局........................................................................................................................................... 47

4.1 电流源设计和布局.................................................................................................................................. 47

4.1.1 电流源设计..................................................................................................................................... 47

4.1.2 温度计码电流源布局................................................................................................................... 50

5.1 温度计码编码电路设计和布局........................................................................................................ 51

5.1.1 二进制代码转温度计码编码电路................................................................................................... 52

5.2 Post simulation 模拟结果
....................................................................................................... 59

第五章 测试设定和量测结果........................................................................................................................ 62

5.1 测试环境设定................................................................................................................................... 62

5.2 量测结果........................................................................................................................................... 65

第六章结論与未來工作展望........................................................................................................................ 69

hanfei1889

有简介有目录，不错！

tm1986

有简介有目录
有简介有目录

shanchuang

thx very much

xiao3586906

很好，下来看看

sehilly

no measurement results

yungying

Thank!!!

chaoqunlv

谢谢分享啊

guihanshu

谢谢分享

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