一种串行逐次逼近10位D/A转换器  

A Serial Successive Approximation 10-Bit D/A Converter

作　　者：张红[1,2] 李红宝[3] 陈海燕[4] 张管兴[5] 张正璠[3] 

机构地区：[1]重庆邮电大学 [2]中国电子科技集团公司第二十四研究所,重庆400060 [3]重庆大学 [4]西南科技大学 [5]西安电子科技大学

出　　处：《微电子学》2006年第6期798-801,共4页Microelectronics

摘　　要：首先对几种形式的D/A转换器进行了比较,设计了一种电容型D/A转换器。这些电容在逐次逼近结构中构成二进制权阵列。这种结构的D/A转换器动态范围大、建立时间短,精度易于保证;且它的温度系数、电压系数、功耗及面积均优于电阻型D/A转换器。在Cadence SpectreS环境下进行仿真验证,该转换器信噪比为49 dB,积分非线性为±0.5 LSB。Several types of D/A converters are compared, and a capacitive D/A converter is designed. These capacitors form binary weight array in successive approximation architecture. The D/A converter using this architecture has a broad dynamic range, short settling time, and guaranteed precision, and it also has better temperature and voltage coefficients, lower power consumption and smaller area, compared with the resistive D/A converter. Results from simulation with Cadence SpectreS show that an SNR of 49 dB and an integral nonlinearity of ±0. 5 LSB are achieved.

关 键 词：逐次比较D/A转换器 比较器 二进制权阵列 

分 类 号：TN792[电子电信—电路与系统]