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发明公开
CN101257290A 一种环形压控振荡器 失效 - 权利终止 许可

一种环形压控振荡器
摘要：
本发明公开了一种环形压控振荡器，包括3至5级延时单元和输出缓冲电路；各级延时单元成环形首尾相连，每一级的正相和负相输入端分别与前一级的负相与正相延时输出端相连，第一级延时单元的正相和负相输入端分别与最末一级延时单元的负相与正相输出端相连；每一级正相和负相信号输出端分别与各输出缓冲电路的正相和负相输入端相连。本发明具有调节范围宽、抖动低的特点。采用五级延时结构时，得到的输出信号频率调节范围为100M－1.3GHz；中心频率为900MHz时，相位噪声为－87dBc/Hz@100KHz和－108dBc/Hz@1MHz；占空比约为50％；平均电流为15mA。
摘要（英）：

The invention discloses a ring shape voltage controlled oscillator, comprising 3 to 5 stages of time-delay unit and output buffer circuit, each stage of the time-delay unit is connected in a ring shape, and the input ends of positive phase and negative phase of each stage are respectively connected with the input ends of positive phase and negative phase of former stage. The input ends of positive phase and negative phase of the first time-delay unit are respectively connected with the output ends of positive phase and negative phase of the last time-delay unit. The signal input ends of positive phase and negative phase of each stage are respectively connected with the input ends of positive phase and negative phase of the output buffer circuit. The invention has characters of wide regulating range and low wobble. When a five stages time-delay structural is adopted, the frequency adjustment range of the obtained output signal is 100M to 1. 3GHz,when the center frequency is 900 MHz, the phase noise is -87dBc/Hz 100KHz and -108dBc/Hz 1MHz,the dutyfactor is about 50and the average current is 15mA.

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