• 易迪拓培训,专注于微波、射频、天线设计工程师的培养
首页 > 测试测量 > 技术文章 > Linear LTC6946高性能低噪音5.7GHz PLL解决方案

Linear LTC6946高性能低噪音5.7GHz PLL解决方案

录入:edatop.com    点击:
Linear 公司的LTC6946是集成了VCO的高性能低噪音5.7GHz 锁相环(PLL),包括基准电源分压器,带锁相指示器的锁相频率检测器(PFD),超低噪音电荷泵,整数反馈除法器,VCO输出驱动器。归一化带内本底相位噪音-226dBc/Hz,归一化带内1/f噪音为-274dBc/Hz,宽带输出相位噪音为-157dBc/Hz,主要用于无线基站(LTE, WiMAX, W-CDMA, PCS),宽带无线接入,军用和安全无线电,测试测量。本文介绍了LTC6946主要特性,方框图,5.7GHz宽带接收器电路图和驱动调制器电路图。

The LTC®6946 is a high performance, low noise, 5.7GHz phase-locked loop (PLL) with a fully integrated VCO, including a reference divider, phase-frequency detector (PFD) with phase-lock indicator, ultralow noise charge pump, integer feedback divider, and VCO output divider. The charge pump contains selectable high and low voltage clamps useful for VCO monitoring.

The integrated low noise VCO uses no external components. It is internally calibrated to the correct output frequency with no external system support.

The part features a buffered, programmable VCO output divider with a range of 1 through 6, providing a wide frequency range.

LTC6946主要特性:

Low Noise Integer-N PLL with Integrated VCO

–226dBc/Hz Normalized In-Band Phase Noise Floor

–274dBc/Hz Normalized In-Band 1/f Noise

–157dBc/Hz Wideband Output Phase Noise Floor

Excellent Spurious Performance

Output Divider (1 to 6, 50% Duty Cycle)

Output Buffer Muting

Low Noise Reference Buffer

Charge Pump Current Adjustable from 250μA to 11.2mA

Configurable Status Output
SPI Compatible Serial Port Control

PLLWizard™ Software Design Tool Support

LTC6946应用:

Wireless Base Stations (LTE, WiMAX, W-CDMA, PCS)

Broadband Wireless Access

Military and Secure Radio

Test and Measurement

20111010105644133.gif
图1。LTC6946方框图
20111010105644573.gif
图2。LTC6946 5.7GHz宽带接收器电路图
20111010105644637.gif
图3。采用LTC6946-2驱动调制器电路图

详情清见:
6946f.pdf(313.58 KB, 下载次数: 0)

点击浏览:矢量网络分析仪、频谱仪、示波器,使用操作培训教程

上一篇:基于MCU+FPGA的航空总线接口板测试平台设计
下一篇:Linear LTC2991八路I2C电压电流和温度监测方案

微波射频测量操作培训课程详情>>
射频和天线工程师培训课程详情>>

  网站地图