参数资料
| 型号： | IP-NCO |
| 厂商： | Altera |
| 文件页数： | 35/54页 |
| 文件大小： | 0K |
| 描述： | IP NCO COMPILER |
| 标准包装： | 1 |
| 系列： | * |
| 类型： | MegaCore |
| 功能： | 数控振荡器编译器 |
| 许可证： | 初始许可证 |
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Chapter 4: Functional Description
Functional Description
Functional Description
Figure 4–1 shows a block diagram of a generic NCO.
Figure 4–1. NCO Block Diagram
4–3
Req u ired
Optional
Freq u ency
Dither
Generator
Phase
Mod u lation
Inp u t
? FM
Internal
Dither
? DITH
Mod u lation
Inp u t
? PM
Phase
Increment
? I N C
W aveform
Generation
Unit
sine
cosine
D
Phase Acc u m u lator
The NCO MegaCore function allows you to generate a variety of NCO architectures.
You can create your custom NCO using an IP Toolbench-driven interface that includes
both time- and frequency-domain analysis tools. The custom NCO outputs a
sinusoidal waveform in two’s complement representation.
The waveform for the generated sine wave is defined by the following equation:
s ? nT ? = A sin 2 ? ? ? f O + f FM ? nT + ? PM + ? DITH ?
where:
( P width ) used for this value by the equation: ? PM = ---------------
? DITH is the internal dithering value
■
■
■
■
■
■
T is the operating clock period
f O is the unmodulated output frequency based on the input value ? INC
f FM is a frequency modulating parameter based on the input value ? FM
? PM is derived from the phase modulation input value P and the number of bits
P
P width
2
A is 2 N -1 where N is the magnitude precision (and N is an integer in the range
10–32)
The generated output frequency, f o for a given phase increment, ? inc is determined by
the following equation:
? inc f clk
M
f o = ------------------ Hz
2
where M is the accumulator precision and f clk is the clock frequency
The minimum possible output frequency waveform is generated for the case where
? inc = 1. This case is also the smallest observable frequency at the output of the NCO,
also known as the frequency resolutio n of the NCO, f res given in Hz by the following
equation:
November 2013
Altera Corporation
NCO MegaCore Function
User Guide
相关PDF资料 |
PDF描述 |
|---|---|
| IP-NIOS | IP NIOS II MEGACORE |
| IP-PCI/MT64 | IP PCI 64BIT MASTER/TARGET |
| IP-PCIE/8 | IP PCI EXPRESS, X8 |
| IP-POSPHY4 | IP POS-PHY L4 |
| IP-RIOPHY | IP RAPID I/O |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IP-NIOS | 功能描述:开发软件 Nios II MegaCore RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors |
| IPO-002-VSF-LF | 制造商:PROXISTOR AB ELECTRONIC 功能描述:PROXIMITY SWITCH, PNP; Sensor Input:Inductive; Sensing Range Max:2mm; Supply Voltage DC Min:10V; Supply Voltage DC Max:30V; SVHC:No SVHC (19-Dec-2012); External Depth:10.5mm; External Length / Height:16.5mm; External Width:30mm; |
| IPOD TOUCH4-C-B | 制造商:Distributed By MCM 功能描述:Apple® iPod Black Touch 4th Gen Digitizer + Glass 制造商:Distributed By MCM 功能描述:APPLE IPOD TOUCH DIGITIZER BLACK |
| IPOD TOUCH4-C-W | 制造商:Distributed By MCM 功能描述:APPLE IPOD TOUCH DIGITIZER WHITE 制造商:Distributed By MCM 功能描述:Apple® iPod White Touch 4th Gen Digitizer + Glass |
| IPP015N04N G | 功能描述:MOSFET OptiMOS 3 PWR TRANST 40V 120A RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
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