一种高Q值且频带可独立调谐的差分有源电感

设计了一种高Q值、频带可独立调谐的新型差分有源电感。采用多重共源-共栅调制结构,使有源电感具有小的等效串联电阻和高的Q值。采用多重共源负反馈结构,使有源电感具有小的等效并联电容、高的自谐振频率和宽的工作频带。通过对正跨导器跨导的调谐来实现对工作频带的调谐,同时,对负跨导器中共源管的跨导进行调谐,补偿因调谐工作频带而对Q值带来的影响,从而实现频带相对于Q值的独立调谐。对该新型差分有源电感进行性能验证,结果表明, 5.9 GHz时,有源电感的Q值高达1 143,电感值可达154 nH。工作频带在6.1~7.7 GHz之间调谐时,调谐范围可达26.2%,而Q值峰值在1 162~1 120之间变化,变化范围仅为3.6%。

A Differential Tunable Active Inductor with High Q Value andIndependent Adjustment of Operation Band

A novel differential tunable active inductor (DTAI) with high Q value and independent adjustment of operation band was presented. The adoption of the multiple common source-common gate regulated structure made the DTAI have low equivalent series resistance and high Q value. The adoption of the multiple common source negative feedback structure made the DTAI have low equivalent parallel capacitance, high self-resonant frequency and wide operation band. By tuning the transconductance of the positive transconductor, the tuning of operation band was realized. Simultaneously, by adjusting the transconductance of the common source transistor in the negative transconductor, the impact of the frequency tuning on the Q factor was mitigated, therefore the band independent adjustment relative to Q value was realized. The performance verification results showed that the peak Q value was as high as 1 143 and the inductance value was up to 154 nH at the operation frequency of 5.9 GHz. Meanwhile, when the operation band was tuned from 6.1 GHz to 7.7 GHz, the peak Q value was varied from 1 162 to 1 120, and the Q variation was only 3.6% compared to the variation of operation band of 26.2%.