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参数资料
| 型号： | MF6CWM-100 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | 6th Order Switched Capacitor Butterworth Lowpass |
| 中文描述： | SWITCHED CAPACITOR FILTER, BUTTERWORTH, LOWPASS, PDSO14 |
| 封装： | SO-14 |
| 文件页数： | 10/20页 |
| 文件大小： | 861K |
| 代理商： | MF6CWM-100 |
1.0 MF6 Application Hints
The MF6 is comprised of a non-inverting unity gain lowpass
sixth order Butterworth switched capacitor filter section and
two undedicated CMOS Op-Amps. The switched capacitor
topology makes the cutoff frequency (where the gain drops
3.01 dB below the DC gain) a direct ratio (100:1 or 50:1) of
the clock frequency supplied to the lowpass filter. Internal in-
tegrator time constants set the filter’s cutoff frequency. The
resistive element of these integrators is actually a capacitor
which is “switched” at the clock frequency (for a detailed dis-
cussion see Input Impedance Section). Varying the clock fre-
quency changes the value of this resistive element and thus
the time constant of the integrators. The clock to cutoff fre-
quency ratio (f
CLK
/f
c
) is set by the ratio of the input and feed-
back capacitors in the integrators. The higher the clock to
cutoff frequency ratio (or the sampling rate) the closer this
approximation is to the theoretical Butterworth response.
The MF6 is available in f
CLK
/f
c
ratios of 50:1 (MF6-50) or
100:1 (MF6-100).
1.1 CLOCK INPUTS
The MF6 has a Schmitt-trigger inverting buffer which can be
used to construct a simple R/C oscillator. The oscillator’s fre-
quency is dependent on the buffer’s threshold levels as well
as on the resistor/capacitor tolerance (see Figure 1).
DS005065-12
FIGURE 1. Schmitt Trigger R/C Oscillator
www.national.com
10
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PDF描述 |
|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MF6CWM-50 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:6th Order Switched Capacitor Butterworth Lowpass |
| MF6M | 制造商:GOOD-ARK 制造商全称:GOOD-ARK Electronics 功能描述:Miniature Glass Passivated Single-Phase Bridge Rectifiers |
| MF6S | 制造商:GOOD-ARK 制造商全称:GOOD-ARK Electronics 功能描述:Miniature Glass Passivated Single-Phase Bridge Rectifiers |
| MF-7 | 制造商:Velleman Inc 功能描述:Conn Power Adapter M/F 2/2 POS ST 1 Port Bulk |
| MF70 | 制造商:DYNEX 制造商全称:Dynex Semiconductor 功能描述:Fast Recovery Diode |
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