基于吉尔伯特单元,设计了一款高线性度低失真模拟乘法器。通过在输入端加入一个电平移位器,使线性输入范围增大,并由一个跨导运算放大器给吉尔伯特单元提供尾电流,有效地改善了乘法器的线性特性。设计的电路基于UMC 0.6μm BCD工艺,采用HSPICE进行仿真验证。结果表明,该乘法器的线性输入范围可达±2 V,非线性误差和总谐波失真分别小于1%和0.3%,适用于要求输入范围大、非线性误差小及失真低的系统。 Based on the Gilbert cell, a high linearity and low distortion analog multiplier is designed. By adding a level shifter at the input, the linear input range is increased, and a transconductance operational amplifier is used to provide tail currents to the Gilbert cell, effectively improving the linearity of the multiplier. The designed circuit is based on the UMC 0.6μm BCD process and is simulated by HSPICE. The results show that the multiplier has a linear input range of ± 2 V and a nonlinearity error of less than 1% and total harmonic distortion of 0.3%. It is suitable for systems that require a large input range, small nonlinear errors and low distortion.