【摘要】 设计了一种全集成交叉耦合变压器反馈的LC压控振荡器(LC-VCO),该VCO在电源电压低于阈值电压的情况下实现了超低功率消耗和低相位噪声。该超低功耗的VCO采用SMIC 0.18μm数模混合RF1P6MCMOS工艺进行了流片验证。测试结果表明:电路在0.4V电源供电和工作频率为2.433GHz时,相位噪声为-125.3dBc/Hz(频偏1MHz),核心直流功耗仅为720μW。芯片的工作频率为2.28~2.48GHz,调谐范围为200MHz(8.7%),电路的优值为-193.7dB,信号的输出功率约为1dBm。该VCO完全可以满足IEEE 802.11b接收机的应用要求。更多还原

【Abstract】 A fully integrated cross-coupled LC tank voltage-controlled oscillator(LC-VCO) using transformer feedback is proposed to achieve an ultra-low-power and low phase noise design even at a supply below the threshold voltage.The ultra-low-power VCO is implemented in mixed-signal and RF 1P6M 0.18μm CMOS technology of SMIC.The measured phase noise is-125.3dBc/Hz at offset frequency 1MHz from the carrier of 2.433GHz while the VCO core circuit draws only 720μW from a 0.4V supply.The designed VCO can cover the frequency range from 2.28 to 2.48GHz.The tuning range of the circuit is 200MHz(8.7%),the FOM is-193.7dB and the output power is about 1dBm which is suitable for IEEE 802.11b receiver.更多还原