一种低电压的全差分OTA  

A Low-Voltage Fully-Differential OTA

作　　者：朱云涛[1] 谢毅[1] 邵丙铣[1] 

机构地区：[1]复旦大学国家微分析中心,上海200433

出　　处：《微电子学与计算机》2005年第10期124-128,共5页Microelectronics & Computer

摘　　要：文章介绍了一种低电压的全差分OTA的实现,通过电流驱动体效应(CDB)使低电源电压OTA设计成为可能。提出了一种新的共模反馈结构(CMFB)实现了全差分输出,提高了OTA的输出范围。文章采用0.18umCMOS工艺库。SPICE仿真结果表明:在电源电压为800mV时,OTA的增益为59.2DB,单位增益带宽为14.3MHz,输出范围为674mV。In this paper, a low-power fully differential OTA was proposed with the new CDB technique and a new CMFB structure, which achieved more output swing. Using 0.18um CMOS model, the OTA was simulated by SPICE. The measurement indicted that the new OTA has a 59.2DB de gain, 14.3MHz bandwidth,and 674mV output swing at a 800mV power supply.

关 键 词：低电压 电流驱动体效应 全差分运算跨导放大器 共模反馈 

分 类 号：TN402[电子电信—微电子学与固体电子学]