The Phase Frequency Detector is operated at 1.8V power supply. The proposed architecture of PFD has been implemented using 0.18碌m CMOS Technology in ELDO- Mentor Graphics tool.Jaimini Prajapati*1International Journal of Engineering Sciences & Research Technology...
Reference frequency 0.32…10 MHz. Output current is 43.5...155.5 uA. The block is fabricated on iHP SiGe BiCMOS 0.25 um (SGB25V) technology. View PLL ECL phase-frequency detector with ECL charge pump full description to... see the entire PLL ECL phase-frequency detector with ECL charge ...
9.3 II类PLL 对于简单PLL的第二个缺点,I类PLL捕获范围低的原因是鉴相器PD在其两个输入频率不一致时无法好好工作。解决办法是引入鉴频鉴相器,phase/frequency detector PFD。 9.3.1 鉴频鉴相器 PFD PFD工作原理: 其输入两个信号A和B,输出两个信号 Q_A 和Q_B: 若Q_A 为低电平,A上升沿触发Q_A上升沿...
Reference frequency 0.32…10 MHz. Output current is 40...140.5 uA. The block is fabricated on iHP SiGe BiCMOS 0.25 um (SGB25V) technology. View PLL CMOS phase-frequency detector with ECL charge pump full description to... see the entire PLL CMOS phase-frequency detector with ECL charge ...
The PLL includes a phase frequency detector, a charge pump, a low pass filter, a voltage controlled oscillator and a frequency divider . 该PLL电路由一个鉴频鉴相器电路、一个电荷泵、一个低通滤波器、一个压控振荡器和分频器组成。 epub.cnki.net 3. The nonideal factor of the phase-frequency de...
suchas 802.11andWiMaxforexample. IndexTerms—phasefrequencydetector,PFD,Chargepump, CP,loopfilter,PLL,frequencysynthesizer. I.INTRODUCTION F IGURE1showsablockdiagramofaphaselocked loop(PLL)typefrequencysynthesizer.Theresearch workpresentedinthispaperisfocusedonthedesignand performancesofthePFDandtheCPas...
Phase detector: 检测input frequency和feedback frequency的相位差。 Loop filter: 通常是low pass的filter,用来稳定反馈系统和平稳控制信号。 VCO: 由电压控制的振荡器,它的输出频率可以看做是输入电压的函数。 这里需要用到一点自控的知识,现在我们来看一下经过拉普拉斯变换后的系统: ...
DIFFERENTIAL PHASE-FREQUENCY DETECTORA phase-frequency detector (PFD) is electrically coupled to a charge pump of a phase-locked-loop (PLL). The PFD includes a first differential latch electrically coupled to the charge pump. The first differential latch drives a differential pair of increment ...
The present invention provides a cycle slip detector circuit for use with a phase and frequency detector circuit having first and second signal inputs, and arranged to provide first and second PLL control signal outputs responsive to clock edges in the first and second input signals respectively; ...
We discuss the reasons producing dead zone in PFD-design. And propose a new phase frequency detector with zero dead zone.The PFD bases on the structure wit... QU Qiang - 《》 被引量: 17发表: 2006年 Design of Phase Frequency Detector and Charge Pump for High Frequency PLL A simple new...