收藏本站
ISL5239
Pre-Distorter (PD)
0
-20
-40
-60
-80
-100
-120
HALFBAND FILTER 2 RESPONSE
The function of the Pre-distorter is to compute the
magnitude of the input signal, look up a complex distortion
vector based on the magnitude, and apply that distortion to
the input signal.
The signal magnitude may be computed by any of three
different methods: log of power, linear magnitude or linear
power. The result is scaled and offset by programmable
amounts and becomes the address into a Look-up Table
(LUT).
Two LUTs are available, one of which is ‘live’ in the circuit
-140
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
NORMALIZED FREQUENCY (NYQUIST=1)
1
and the other is offline and can be loaded via the processor
interface. This configuration allows instantaneous switching
of pre-distortion characteristics without unpredictable
FIGURE 3A. X4, HB1 AND HB2 ENABLED FREQUENCY
effects on the processed signal.
RESPONSE
The LUTs contain a complex distortion vector, as well as
complex delta values which interact with an external
0
-20
-40
-60
-80
-100
-120
HALFBAND FILTER 3 RESPONSE
Thermal/Memory calculation circuit to predict the effects of
temperature changes on the RF amplifier’s behavior and
compensate. The average power into the amplifier is
computed and transmitted serially off chip. The external
circuits compute one or two memory effect coefficients
which are combined with the complex delta values in the
LUT to derive the final distortion vector. The distortion
vector is a rectangular complex value which is multiplied
with the input signal resulting in a magnitude based non-
linearity. Access to the LUT is optimized by the use of an
auto incrementing address register which allows the tables
to be updated with only one address register write
-140
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
operation. Control words 0x10 through 0x1d apply to the
NORMALIZED FREQUENCY (NYQUIST=1)
FIGURE 3B. X8, HB1-HB3 ENABLED FREQUENCY RESPONSE
7
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ISL5416EVAL1 EVALUATION PLATFORM FOR ISL5416
ISL55005IEZ-T7 IC AMP MMIC BIPO BROADBND SC70-6
ISL55007IEZ-T7 IC AMP MMIC BIPO BROADBND SC70-6
ISL55008IEZ-T7 IC AMP MMIC BIPO BROADBND SC70-6
ISL55009IEZ-T7 IC AMP MMIC BIPO BROADBND SC70-6
ISL55010IEZ-T7 IC AMP MMIC BIPO BROADBND SC70-6
ISL55011IEZ-T7 IC AMP MMIC BIPO BROADBND SC70-6
ISL55012IEZ-T7 IC AMP MMIC BIPO BROADBND SC70-6
相关代理商/技术参数
ISL5314 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Direct Digital Synthesizer
ISL5314_05 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Direct Digital Synthesizer
ISL5314EVAL2 制造商:Intersil Corporation 功能描述:DEV TOOL FOR COMMLINK DIRECT DGTL SYNTHESIZER - Bulk
ISL5314IN 功能描述:IC SYNTHESIZER DIGITAL 48-MQFP RoHS:否 类别:集成电路 (IC) >> 接口 - 直接数字合成 (DDS) 系列:- 产品变化通告:Product Discontinuance 27/Oct/2011 标准包装:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 调节字宽（位）:32 b 电源电压:2.97 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR)
ISL5314INZ 功能描述:IC SYNTHESIZER DIGITAL 48-MQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 直接数字合成 (DDS) 系列:- 产品变化通告:Product Discontinuance 27/Oct/2011 标准包装:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 调节字宽（位）:32 b 电源电压:2.97 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR)
ISL54000 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Integrated Audio Amplifier Systems
ISL54000IRTZ 功能描述:IC AMP AUDIO PWR 1.23W AB 20TQFN RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:D 类 输出类型:1-通道（单声道），带立体声耳机 在某负载时最大输出功率 x 通道数量:930mW x 1 @ 8 欧姆; 40mW x 2 @ 16 欧姆 电源电压:2.7 V ~ 5.5 V 特点:消除爆音，差分输入，I²C，静音，关闭，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) 其它名称:MAX97000EWA+T-ND
ISL54000IRTZ-T 功能描述:IC AMP AUDIO PWR 1.23W AB 20TQFN RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:D 类 输出类型:1-通道（单声道），带立体声耳机 在某负载时最大输出功率 x 通道数量:930mW x 1 @ 8 欧姆; 40mW x 2 @ 16 欧姆 电源电压:2.7 V ~ 5.5 V 特点:消除爆音，差分输入，I²C，静音，关闭，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) 其它名称:MAX97000EWA+T-ND