多年来,微波频率生成使工程师面临严峻的挑战,不仅需要对模拟、数字、射频(RF)和微波电子有深入的了解,尤其是锁相环(PLL)和压控振荡器(VCO)集成电路组件方面,还需要具备可调滤 波、宽带放大以及增益均衡等专业知识。 本文重点介绍近些年微波电路设计取得的进步,这意味着现在采用硅芯片技术中的低相位噪声VCO可以覆盖一...
Beat Frequency设成中心频率1G即可,不必过于精确,一般只要你设置的频率在1/4的实际频率到4倍的实际频率之间,就不会出啥问题。 Run transient?选项下面的那个Tstab是用来设置给振荡器预热的时间的(就是让振荡器进入稳定的震荡预留的时间),这里选Decide automatically就行。 然后Oscillator那里勾上并且选上两个输出节点。
全温度范围内电压转换增益与RF频率的关系 6 4 2 0 640 TTTAAA = = = –40°C +25°C +85°C 1140 1640 2140 2640 LO FREQUENCY (MHz) 图7. 输入P1dB与LO频率的关系 90 BWSEL = 0 80 70 60 IIP2 50 40 30 20 10 600 IIP3 –40°C +25°C +85°C 800 1000 1200 1400 1600 1800 2000...
Method for a Constant Loop Bandwidth in LC-VCO PLL Frequency Synthesizers 热度: PLL,VCO技术经验总结 锁相环通常由鉴相器(PD,PhaseDetector)、环路滤波器(LF,LoopFilter)和 压控振荡器(VCO,VoltageControlledOscillator)三部分组成。目前常用锁相环有整 ...
but CLK0_OUT is also 400 MHz which I do not need. My feedback will run at this frequency....
The RF2057 is a low power, high performance, wideband RF frequency conversion chip with integrated local oscillator (LO) generation and a pair of RF mixers. The RF synthesizer includes an integrated fractional-N phase locked loop with voltage controlled oscillator (VCO) and dividers to produce a...
Is best IOPLL performance obtained by minimizing the VCO frequency, or maximizing it? The IOPLL IP generator GUI appears to be confused on this issue, at least for Stratix 10. It describes one thing and does the opposite. The GUI provides the option of either manually s...
LO Frequency from 300 MHz to 4.8 GHz 76-dBc Single-Carrier WCDMA ACPR at –8-dBm Channel Power OIP3 of 26 dBm P1dB of 11.5 dBm Integer/Fractional PLL Phase Noise –132 dBc/Hz (at 1 MHz, fVCO of 2.3 GHz) Low Noise Floor: –160 dBm/Hz ...
The system uses the second analog fine tuning inputs to compensate the VCO for frequency shifts due to temperature fluctuation. When the PLL transitions to the fine lock (FL) mode, the system starts driving the second fine tuning input with a differential amplifier. The differential amplifier ...
HPS PLL VCO Frequency Range Table 41. HPS PLL VCO Frequency Range for Cyclone® V Devices DescriptionSpeed GradeMinimumMaximumUnit VCO range –C7, –I7, –A7, –C8 320 1,600 MHz –C6 320 1,850 MHz HPS PLL Specifications HPS PLL Input Clock Range Company...