摘要
设计了一种适用于DVB-C标准的高频调谐器中的CM06可变增益放大器．该放大器由指数控制电路、放大电路和共模反馈电路三部分组成，其中指数控制电路是通过构造一个近似的指数函数来实现．仿真结果表明放大器在3．3V供电电压时，核心电路功耗为4．63mW，增益范围0～30dB，频率范围是46～268MHz，噪声系数小于10dB．
A CMOS variable gain amplifier（VGA）is designed, which is suitable for the turner of digital video broadeastingcable（DVB-C）. The amplifier is consists of exponential control circuit, amplifier circuit and common mode feedback circuit. The exponential circuit is presented by an approximate exponential function. Simulation results show that the VGA core consumes 4.63mW at 3.3V supply voltage and has a gain range from 0 to 32dB. The frequency range is 46 268MHz and noise figure is less than 10dB.
出处
《微电子学与计算机》
CSCD
北大核心
2008年第3期58-60,共3页
Microelectronics & Computer
