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The Design and Implementation of a low-power 10 - bit current-steering DAC

Author: XiaZuo
Tutor: XuJun；FuYaoXian
School: Fudan University
Course: IC Engineering
Keywords: Mixed analog-digital circuits Digital-to-Analog Converter Segmented Thermometer-coded Current Steering
CLC: TN792
Type: Master's thesis
Year: 2011
Downloads: 122
Quote: 0
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Abstract


This paper a more comprehensive overview of the digital - to - analog converter (DAC, Digital Analog Convertor) developments at home and abroad , introduces the basic principles and performance parameters of the DAC , carried out a detailed analysis of several typical DAC structure . The paper designed a method for SOC internal low-power 10 - bit segmented current steering DAC . Temperature code and binary code two different current-steering DAC structure analysis using 10 segmented current steering structure , high seven thermometer-coded weighted current source structure , low three binary weighted current sources . The paper introduces the input data latch, thermometer codec unit current source , and the band gap voltage reference circuit module design . The DAC is based on the SMIC 0.18um 1P6M mixed-signal technology , the simulation results show that under the conditions of a load of 500 ohms , the output voltage swing of ± 320mV, the full-scale current of 640mA , integral nonlinearity error of less than ± 0.27LSB differential non- linearity error is less than ± 0.3LSB, SFDR of 56.59dB when the working frequency of 100MHz . DAC is a typical power consumption is 4.73mW. The effective chip area of ??1.38mm × 0.36mm.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Digital circuits > Digital-analog , digital to analog conversion circuit
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