用于蓝牙射频芯片发送通道的电流驱动型7位20 MHz CMOS DAC  

Current-steering 7-bit 20 MHz CMOS DAC Applied in Transmitter of Blue-tooth RF Circuit

作　　者：李丹[1] 王方林[1] 朱臻[1] 洪志良[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海200433

出　　处：《复旦学报（自然科学版）》2004年第1期40-44,共5页Journal of Fudan University：Natural Science

摘　　要：介绍了一种应用在蓝牙射频芯片发送通道中的7位电流驱动型CMOS数模转换器,采样频率为20MHz.电路设计中使用单位电流源阵列和数字同步控制单元来提高电流源的匹配性和动态范围;版图设计利用梯度和温度误差的分布规律通过误差平均化的电流源阵列布局方案来避免误差积累.该芯片采用0.35μm标准CMOS制造工艺,面积为0.03mm2.在3.3V工作电压下,测试结果显示芯片的静态分辨率达到了设计目标,功耗为0.86mW.A 7-bit binary weighted current-steering CMOS DAC applied to transmitter of blue-tooth RF circuit is presented, the sampling frequency is 20 MHz. In the circuit design, unit current source arrays and digital synchronizing cells are used to improve the matching and dynamic range of DAC. In the layout design, gradient error and temperature error are compensated by the optimization of current sources sequences. The circuit is realized with 0.35 μm CMOS technology and its die area is 0.03 mm^2. The test results show that the circuit has 7-bit static resolution while the power consumption is 0.86 mW under 3.3 V supply voltage.

关 键 词：集成电路 蓝牙 射频 数模转换器 电流驱动型 二进制译码 

分 类 号：TN402[电子电信—微电子学与固体电子学] TN492