数字锁相环(PLL) PLL内部的功能框图如下图所示:Logos PLL 主要由鉴频鉴相器(PFD,Phase Frequency Detector)、环路滤波器(LF,Loop Filter)和压控振荡器(VCO,Voltage Controlled Oscillator) 等组成。通过不同的参数配置,可实现信号的调频、调相、同步、频率综合等功能。 LogosPLL 的电路框图如下图所示: 想了解更...
数字锁相环(PLL) PLL内部的功能框图如下图所示:Logos PLL 主要由鉴频鉴相器(PFD,Phase Frequency Detector)、环路滤波器(LF,Loop Filter)和压控振荡器(VCO,Voltage ControlledOscillator) 等组成。通过不同的参数配置,可实现信号的调频、调相、同步、频率综合等功能。 LogosPLL 的电路框图如下图所示: 想了解更多...
数字锁相环(PLL) PLL内部的功能框图如下图所示:Logos PLL 主要由鉴频鉴相器(PFD,Phase Frequency Detector)、环路滤波器(LF,Loop Filter)和压控振荡器(VCO,Voltage Controlled Oscillator) 等组成。通过不同的参数配置,可实现信号的调频、调相、同步、频率综合等功能。 LogosPLL 的电路框图如下图所示: 想了解更...
A loop filter’s bandwidth can be doubled by doubling either the PFD frequency or the charge-pump current. If the actual Kv of the VCO is significantly higher than the nominal Kv used to design the loop filter, the loop bandwidth will be significantly wider than expected. The variation of...
The program designs a loop filter and displays key parameters including phase noise, reference spurs, lock time, lock detect performance, and others.ADIsimPLL operates with spreadsheet-like simplicity and interactivity. The full range of design parameters such as loop bandwidth, phase 56、 margin, ...
Detector,PD)、环路滤波器(Loop Filter,LF)和压控振荡器(Voltage Controlled Oscillator,VCO)。其中,鉴相器用于检测输入信号fint和输出信号fout的相 位差,并根据输入信号fint和输出信号fout的相位差生成误差电压Ud。环路滤波器实质上 是低通滤波器,用于滤除误差电压Ud中的高频及干扰成分,得到控制电压Uc。压控振荡...
Achieving optimal design of phase-locked loop (PLL) is a major challenge in WiMax technology in order to improve system behavior against noise and to enhance Quality of Service (QOS). A new loop filter design method for phase locked loop (PLLs) is introduced taking into consideration various ...
In contrast to the existing approaches, the design is based on a discrete-time model with loop delay. In addition to the closed-loop stability, this method deals with the practical considerations: ripple swing, reference spur, and stability margin. One advantage of the proposed method is that ...
The program designs a loop filter and displays key parameters including phase noise, reference spurs, lock time, lock detect performance, and others. ADIsimPLL operates with spreadsheet-like simplicity and interactivity. The full range of design parameters such as loop bandwidth, phase margin, VCO ...
design was tested with theADF4150HV evaluation board, using a PLL loop bandwidth of 20 kHz. From Figure 7, a PSR of about 70 dB might be expected. Due to the excellent PSR, this setup showed no evident switching spurs (< –110 dBm) at the VCO output—even when the noise filter was...