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中文摘要：
设计了一种低功耗、宽频率调谐范围的伪差分环形压控振荡器（VCO）。电路设计分为振荡环路设计和电流源设计两部分。在振荡器的振荡环路部分,提出了一种新颖的降低功耗的方法,即通过动态地调节接入振荡环路的锁存器,减小驱动电流,降低功耗;在振荡器的控制电源部分,采用gain-boost结构,设计了一款理想的可控双电流源,实现了振荡器的宽频率调谐范围。基于SMIC 65 nm工艺,在1.8 V工作电压下,对振荡器进行了后仿验证。结果表明,在频率为900 MHz时,振荡器的功耗仅为3.564 m W;当控制电压在0.6~1.8 V变化时,振荡器的频率调谐范围可宽达0.495~1.499 GHz。
英文摘要：
A low power, wide tuning range pseudo different ring voltage-controlled oscillator （VCO） was designed. The design of VCO was divided into two parts, VCO-ring design and current source design. In the design of VCO-ring, a novel method to reduce power consumption was proposed. The dynamic adjustment of latch connected in the VCO-ring decreased the driving current, hence reduces power consumption. In the design of controlled current source, a ideal controlled dual current source was designed by using gain-boost structure, the wide frequency tuning range of this VCO was achieved. Based on the SMIC 65 nm process, under a supply voltage of 1.8 V, the VCO was verified by post simula- tion. The results show that the power consumption of the VCO is only 3. 564 mW at 900 MHz, a wide frequency tuning range from 0. 495 GHz to 1. 499 GHz when the controlled-voltage is from 0. 6 V to 1.8 V.
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