參數(shù)資料
型號: LMF100CIWM
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 模擬濾波器
英文描述: High Performance Dual Switched Capacitor Filter
中文描述: DUAL SWITCHED CAPACITOR FILTER, RESISTOR PROGRAMMABLE, UNIVERSAL, PDSO20
封裝: SOP-20
文件頁數(shù): 26/28頁
文件大?。?/td> 868K
代理商: LMF100CIWM
3.0 Applications Information
(Continued)
signals. In noise-sensitive applications, a ratio of 100:1 will
result in 3 dB lower output noise for the same filter configu-
ration.
The accuracy of the f
/f
ratio is dependent on the value of
Q. This is illustrated in the curves under the heading “Typical
Performance Characteristics”. As Q is changed, the true
value of the ratio changes as well. Unless the Q is low, the
error in f
/f
will be small. If the error is too large for a spe-
cific application, use a mode that allows adjustment of the ra-
tio with external resistors.
DS005645-35
FIGURE 25. The Sampled-Data Output Waveform
www.national.com
26
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