参数资料
| 型号： | IP-NCO |
| 厂商： | Altera |
| 文件页数： | 50/54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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A–4
Appendix A: Example Multichannel Design
Multichannel Design
Implementation Settings
The design uses the following implementation settings:
■
■
■
■
Frequency modulation —The frequency modulation setting allows the use of an
external frequency for modulating input signal. The modulator resolution is 32
bits and the modulator pipeline level is 1.
P hase modulation — A phase modulation input is necessary with 32 bits for
modulator precision and the modulator pipeline level is 1.
Output —Dual output is used for generating both the sine and cosine outputs.
Multi-Channels NCO —The number of channels is 4.
Simulation Specification
The provided ModelSim simulation script generates signals with different frequencies
and phases in four separate channels as shown in Table A–1 . The table also shows the
parameter settings that are needed to generate the required signals in four separate
channels.
Table A–1. ModelSim Simulation Map
Channel
Generated Signal
Settings
Frequency
5 MHz
f 0
5 MHz
0
Phase
0
f MOD
0
p MOD
0
Frequency
2 MHz
f 0
500 KHz
1
Phase
? /4
f MOD
1,500 KHz
p MOD
? /4
Frequency
1 MHz
f 0
100 KHz
2
Phase
? /2
f MOD
900 KHz
p MOD
? /2
Frequency
500 KHz
f 0
10 KHz
3
Phase
p
f MOD
490 KHz
NCO MegaCore Function
User Guide
p MOD
p
November 2013 Altera Corporation
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