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參數資料
| 型號： | LMF100 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | High Performance Dual Switched Capacitor Filter |
| 中文描述： | 高性能雙開關電容濾波器 |
| 文件頁數： | 9/28頁 |
| 文件大小： | 868K |
| 代理商： | LMF100 |
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1.0 Definitions of Terms
f
:
the frequency of the external clock signal applied to pin
10 or 11.
f
:
center frequency of the second order function complex
pole pair. f
is measured at the bandpass outputs of the
LMF100, and is the frequency of maximum bandpass gain.
(Figure 1).
f
:
the frequency of minimum (ideally zero) gain at the
notch outputs.
f
:
the center frequency of the second order complex zero
pair, if any. If f
is different from f
and if Q
is high, it can be
observed as the frequency of a notch at the allpass output.
(Figure 13).
Q:
“quality factor” of the 2nd order filter. Q is measured at the
bandpass outputs of the LMF100 and is equal to f
divided
by the 3 dB bandwidth of the 2nd order bandpass filter (Fig-
ure 1). The value of Q determines the shape of the 2nd order
filter responses as shown in Figure 6
Q
:
the quality factor of the second order complex zero pair,
if any. Q
Z
is related to the allpass characteristic, which is
written:
where Q
Z
= Q for an all-pass response.
H
OBP
:
the gain (in V/V) of the bandpass output at f = f
0
.
H
:
the gain (in V/V) of the lowpass output as f
→
0 Hz
(Figure 2).
H
:
the gain (in V/V) of the highpass output as f
→
f
CLK
/2
(Figure 3).
H
ON
:
the gain (in V/V) of the notch output as f
→
0 Hz and as
f
→
f
CLK
/2, when the notch filter has equal gain above and
below
the
center
frequency
low-frequency gain differs from the high-frequency gain, as
in modes 2 and 3a (Figure 10 and Figure 12), the two quan-
tities below are used in place of H
ON
.
H
ON1
:
the gain (in V/V) of the notch output as f
→
0 Hz.
H
ON2
:
the gain (in V/V) of the notch output as f
→
f
CLK
/2.
(Figure
4).
When
the
DS005645-19
(a)
DS005645-20
(b)
FIGURE 1. 2nd-Order Bandpass Response
www.national.com
9
相關PDF資料 |
PDF描述 |
|---|---|
| LMF100CCN | High Performance Dual Switched Capacitor Filter |
| LMF100CIWM | High Performance Dual Switched Capacitor Filter |
| LMF100ACN | IC-MONOLITHIC FILTER |
| LMF380 | LMF380 Triple One-Third Octave Switched-Capacitor Active Filter |
| LMF380C1J | LMF380 Triple One-Third Octave Switched-Capacitor Active Filter |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMF100ACN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:IC-MONOLITHIC FILTER |
| LMF100AJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Filter |
| LMF100CCN | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:FILTER DUAL SWITCHED CAP DIP 100 |
| LMF100CCN | 制造商:Texas Instruments 功能描述:FILTER DUAL SWITCHED CAP DIP 100 |
| LMF100CCN/NOPB | 功能描述:IC FILTER DUAL SWITCH CAP 20-DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數:4 濾波器階數:8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
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