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【简答题】
在习题8.8图所示的锁相频率合成器中，已知fL=40MHz，fs=10MHz，要求输出频率的频率间隔为0.1MHz，输出频率fo=70~99.9MHz，求fr、m和n的值。
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Computers have many uses today. Computers can solve difficult (56) and control complex machines. Many people use small computers (57) calculators to add, subtract, multiply, and divide (58) quickly. S...
A.
numbers
B.
sums
C.
columns
D.
amounts
【单选题】Computers have many uses today. Computers can solve difficult (56) and control complex machines. Many people use small computers (57) calculators to add, subtract, multiply, and divide (58) quickly. S...
A.
opens
B.
turns
C.
reads
D.
holds
【单选题】Computers have many uses today. Computers can solve difficult (56) and control complex machines. Many people use small computers (57) calculators to add, subtract, multiply, and divide (58) quickly. S...
A.
book
B.
page
C.
copy
D.
message
【单选题】音乐合成器是__________。
A.
完成各种信号的记录和播放任务
B.
负责将数字音频波形数据或MIDI消息合成为声音
C.
完成许多处理工作，如压缩和解压缩、改变采样频率、解释MIDI指令等
D.
将不同途径，如话筒或线路输入、CD输入的声音信号进行混合