Now got one of these filters into my circuit. Anyone familiar with these models??
How do I have to set the parameters for a low pass filter, of, say, corner freq. = 100Hz?
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Input impedance. There are three possible settings:
- Zin=-1 ? zero-impedance input (voltage source)
- Zin=0 ? high-impedance input (current source)
- Zin>0 ? µ÷´Ü¾±²Ô°¨¦¸
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Output impedance. There are two possible settings:
- Zout=0 ? high-impedance output (floating)
- Zout>0 ? µ÷´Ü´Ç³Ü³Ù°¨¦¸ output
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| Only one of the impedances can be zero at a time! |
| fp1, fs1, fp2, fs2 |
Hz |
Corner frequencies for the passband and stopband, defaults <500,400,2k,2.5k> |
| BWp, BWs, fc |
Hz |
Alternate frequency settings: passband bandwidth,
stopband bandwidth, and center frequency, defaults are calculated based
on the corner frequencies and, based on those, <1.5k,2.1k,1k> |
| As |
dB |
Stopband attenuation, default 40 |
| Asc |
dB |
Frequency-scaling attenuation. If Asc=0, N>0 the passband is optimized. Default 3.0103 |
N=<0:1:32>
N=<0:2:64> |
- |
Order of the filter, its value represents the order
after the frequency transformations. For lowpass and highpass the
maximum order is 32 and can take odd and even values. For bandpass and bandstop it's 64, but only even values are valid. If N=0 and Asc>0, the minimum order is determined based on the values of the frequencies and attenuations. Default 13 |
| sim |
s |
Total .TRAN simulation time, default 1 |
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| Rpar, Rser |
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LTspice's specific for inductors and capacitors, common for both (i.e. setting Rser means inductors and capacitors, together, will have it set, same for Rpar), defaults <1g,0> |
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Am 12.07.2023 um 09:39 schrieb Christoph <
kuku@...>:
Am 12.07.2023 um 09:08 schrieb Christoph <
kuku@...>:
I would like to apply filters to a signal of discrete sample points and watch the effect of order, gain and other characteristics.
Found this page:
Firefox refuses to download the files (e.g. Filt.zip at the bottom of the page) since the links aren¡¯t secured. Any alternatives?
OK, I managed to download the Filt.zip file using?
$?wget
Christoph