以0.18微米CMOS製程設計和實現之10位元250MHz電流導向數位類比轉換器

Design and Implementation of a 10-bit 250-MS/s Current Steering Digital-to-Analog Converter in 0.18μm CMOS Process

劉昱昌(Yu-Chang Liu)

指導教授 ： 林佑昇

國立暨南國際大學/科技學院/電機工程學系/碩士(2012年)

https://doi.org/10.6837/NCNU.2012.00015

摘要

本論文模擬和佈局實現一個十位元取樣頻率250MHz的電流導向式數位類比轉換器，並利用台積電提供的TSMC 0.18µm 1P6M實現一個電路，電路架構分數位和類比兩個部分，為了減少突波效應、整體非線性誤差、差異非線性誤差，且為了保持轉移曲線的單調性，所以使用分段式架構，輸入為十位元的數位訊號，其最高六位元使用溫度計碼，最低四位元為二進位權重碼，而架構主要分四個部分（一）、數位電路（二）、時脈電路、緩衝器（三）、deglitch閂鎖電路 （四）、電流源單元。且電流導向數位類比轉換器的輸出電流不需要一輸出緩衝器就可以直接驅動負載電阻，因此在速度上相較於其他架構有優勢。最後在量測時先以類似此架構量測TSMC 0.35µm DAC chip以其量測方式及其結果，做為本論文的量測為參考。

關鍵字

電流導向式數位類比轉換器 ； 溫度計碼 ； 二進位權重碼

並列摘要

The simulation and layout of the thesis is to achieve a 250MHz 10bits current steering DAC, and is expected to complete tape out by 0.18um 1p6m process provided by Taiwan Semiconductor Manufacturing Company provided . The circuit layout design has two parts - digital and analog. To reduce the glitch and differential nonlinearity (DNL), integral nonlinearity (INL) and to maintain the transfer curve monotonic the circuit is designed to be segmented structure, in which the highest 6bits MSB is the thermometer decoder and the lowest 4bits LSB is weighted binary code. The circuit is composed of 4 main parts: (1) digital circuit (2) clock drive, buffer (3) Deglitch Latch (4) current units. And current steering DAC output current do not need to output buffer can Directly drive the load resistance, so better than other architecture has speed advantages. Finally, first measurements to similar measurements of this structure TSMC 0.35μm the DAC chip for its measurement method and its results as a measurement of the paper as a reference.

並列關鍵字

current steering DAC ； thermometer decoder ； weighted binary code

參考文獻

[1] Steven Shepard,〝RFID Radio Frequency Identification〞New York,McGraw-Hill , 2005

[2] 林佑昇,邱弘緯,梁效彬,〝RFID 晶片設計〞中華民國100年1月初版發行

[3]Rudy van de Plassche, Broadcom Netherlands BV, The Netherlands and Broadcom, Irvine, CA, U.S.A.〝CMOS Integrated Analog-to-Digital and Digital-to-Analog Converters 2nd Edition〞Baker & Taylor Books, 2003-05-31

[4]Allen、Holberg 〝CMOS Analog circuit Design〞oxford university press all rights reserved 2002

[5]R.Jacob Baker 〝CMOS Mixed-Signal Circuit Design second edition〞WILEY 2009