一种Q-f与L-f特性增强的高线性有源电感

提出了一种品质因数(Q)-频率(f)特性与电感值(L)-频率(f)特性增强的新型高线性有源电感,主要由负跨导器、新型正跨导器、Q值增强调制模块、反馈电阻、两级电平转换电路和负跨导器分流支路组成。通过多个电路单元间的协同配合和所设置的三个外部偏置端电压的联合调谐,该有源电感不但具有高Q值,Q值相对于电感值可独立调节,而且高Q峰值及电感值在不同频率下能够基本保持不变,同时也有高的线性度。验证结果表明,在6 GHz下,Q值可在275~4 471之间变化,调谐率为176.8%,而电感值的变化率仅为1.5%；在4.8 GHz、5.2 GHz、5.6 GHz和6 GHz的4个频点下,分别获得了4 480、4 469、4 473和4 471的高Q峰值,变化率仅为0.24%,且电感值分别为7.532 nH、7.467 nH、7.909 nH、7.977 nH,变化率仅为6.3%；电感值的-1 dB压缩点为-13 dBV。

A High Linearity Active Inductor with Enhanced Q-f and L-f Characteristics

A novel high linearity active inductor with enhanced characteristics of quality factor (Q)-frequency (f) and inductance value (L)-frequency (f) was proposed, which is mainly composed of a negative transconductor, a novel positive transconductor, a Q-enhanced modulation module, a feedback resistance, a two-stage level shift circuits and a negative transconductor shunt branch. By the cooperation among the above multiple circuit units and the joint tuning of the constructed three external bias terminal voltages, the active inductor not only had a high Q values and had ability to make the Q values be able to be ajusted independently relative to the inductance values, but also the high Q peaks and inductance values could remain almost unchanged at different frequencies, and at the same time had high linearity. The verification results show that at 6 GHz, the Q value can vary from 275 to 4 471 with the tuning percentage of 176.8%, while the inductance value variation is only 1.5%; at the operating frequencies of 4.8 GHz, 5.2 GHz, 5.6 GHz and 6 GHz, the Q peak values of 4 480,4 469,4 473 and 4 471 with a variation of only 0.24% are obtained, respectively, while the inductance values are 7.532 nH, 7.467 nH, 7.909 nH and 7.977 nH with a change of only 6.3% respectively; the -1 dB compression point of the inductance value is -13 dBV.