用于锁相环的低电源电压振荡器电路

By employing a transconductance-enhanced differential Colpitts circuit structure, a PMOS tail current source, and a negative feedback circuit in the phase-locked loop, the problem of traditional oscillators being unable to adapt to low power supply voltages is solved, thus realizing a phase-locked loop oscillator design with low power consumption and high quality factor.

CN117220607BActive Publication Date: 2026-07-17UNIV OF SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF SCI & TECH OF CHINA
Filing Date
2023-10-12
Publication Date
2026-07-17

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Abstract

提供一种用于锁相环的低电源电压振荡器电路，包括：主振荡器核心电路，用于产生振荡正弦波信号，主振荡器核心电路包括第二PMOS晶体管和跨导增强差分Colpitts电路；偏置电路，用于为主振荡器核心电路提供尾电流源偏置电压，偏置电路包括电流支路、负反馈电路、以及运算放大器；跨导增强差分Colpitts电路与第二PMOS晶体管的漏极相连的连接处设置有第一节点；运算放大器的正向输入端连接至第一节点，运算放大器的反向输入端与电流支路相连处设置有第二节点，偏置电路通过运算放大器进行钳位，使第一节点和第二节点电位相等；负反馈电路包括第三PMOS晶体管，与运算放大器、第二PMOS晶体管共同作用形成负反馈回路，确保电路稳定性。
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