公开(公告)号：KR100884114B1

公开(公告)日：2009-02-17

申请号：KR1020070106712

申请日：2007-10-23

Applicant: 한국정보통신대학교 산학협력단

Inventor： 김철회 ,  서민우 ,  유형준

IPC: H03B5/12

CPC classification number: H03B27/00 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1246 ,  H03B2200/0078

Abstract: A quadrature voltage controlled oscillator with low power and low phase noise characteristic is provided to reduce a phase noise and a flicker noise by using a filer inductor. A quadrature voltage controlled oscillator includes a first delay cell(200) and a second delay cell(300). The first delay cell outputs a first in-phase signal and a second in-phase signal. The second delay cell outputs a first orthogonal phase signal and a second orthogonal phase signal. The first and second delay cells include a resonance circuit(100), first and second complementary transistors(M1,M2), third and fourth complementary transistors(M3,M4), and fifth and sixth transistors(M5,M6) and a filter inductor. The resonance circuit corresponds to the control voltage and controls the frequency of the oscillation signal. The first and second transistors are connected to the one electrode of the resonance circuit in series and maintain the oscillation signal. The third and fourth transistors are connected to the other electrode of the resonance circuit in series and maintain the oscillation signal. The fifth and sixth transistors are connected between the first and second transistors and the power terminal in series and generate the orthogonal phase. The filter inductor is connected between the third and fourth transistors and the ground terminal and reduces the phase noise.

Abstract translation: 提供具有低功耗和低相位噪声特性的正交压控振荡器，以通过使用滤波电感来减少相位噪声和闪烁噪声。 正交压控振荡器包括第一延迟单元（200）和第二延迟单元（300）。 第一延迟单元输出第一同相信号和第二同相信号。 第二延迟单元输出第一正交相位信号和第二正交相位信号。 第一和第二延迟单元包括谐振电路（100），第一和第二互补晶体管（M1，M2），第三和第四互补晶体管（M3，M4）以及第五和第六晶体管（M5，M6）和滤波电感器 。 谐振电路对应于控制电压并控制振荡信号的频率。 第一和第二晶体管串联连接到谐振电路的一个电极并保持振荡信号。 第三和第四晶体管串联连接到谐振电路的另一个电极并保持振荡信号。 第五和第六晶体管串联连接在第一和第二晶体管与电源端子之间，并产生正交相位。 滤波电感连接在第三和第四晶体管与接地端子之间，并降低相位噪声。