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Issue:
diao pin guang bo de shu zi shi xian fang shi
Author(s):
WANG Zhuo
,
ZENG Qingjun
Pages:
53
-
55
Year:
1997
Issue:
9
Journal:
Radio & Television Information
Keyword:
变容
;
压控振荡器
;
调制信号
;
振荡电路
;
振荡器频率
;
设计电路
;
二级管
;
电容组
;
杂散信号
;
数控振荡器
;
Abstract:
<正> 模拟调频是利用一个调谐到某一频率上的振荡器,其振荡电路由电感和电容组成,当电容值随调制信号变化,就使振荡频率发生变化,从而实现调频。这种振荡器即我们熟悉的压控振荡器(VCO),而最常用的压控变容器件就是变容二级管。 这种技术比较直观,但设计电路时必须面对许多问题,特别是实际应用中变容二极管的电容
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