基于0.18 μm CMOS工艺的电流型模拟运算电路

Current mode analog operational circuit based on 0.18 μm CMOS process

提出了一种新的低电压低功耗CMOS电流型模拟多功能运算电路,该电路能够运行乘法器、求平方器、除法器以及不同类型的可控增益放大器。该设计基于跨导线性原则,使用场效晶体管(MOSFET)且运行在亚阈值区,其由6个相匹配的晶体管组成,并形成两个重叠的跨导线性回路,电路设计采用0.18μm CMOS技术,使用±0.6 V低压直流电源供电。通过Tanner TSpice软件进行了仿真验证,仿真结果表明,当将其配置为一个放大器时,-3 d B频率约为1.5 MHz,线性误差为0.63%,总谐波失真为0.08%,最大功耗为1.16μW。

A new CMOS current mode muhifunction analog operational circuit with low vohage and low power consumption is proposed, which can run multiplier, squarer, divider and different types of controllable gain amplifiers. The design is based on translinear principle, in which MOSFET is adopted and runs in the subthreshold region. The proposed circuit is composed of six inter-matching transistors to form two overlapping tranlinear loops. The circuit is based on 0.18 μm CMOS process, and supplied with ±0.6 V low voltage DC source. The circuit was verified by simulation of Tanner TSpice software. The simulation resuits show that when the circuit is configured as an amplifier, its frequency is about 1.5 MHz at -3 dB, linear error is 0.63%, total harmonic distortion is 0.08%, and maximum power consumption is 1.16 μW.