ellf.ans

巴特沃斯、切比雪夫I和椭圆滤波器设计的源程序！非常难得！ 简洁的C语言编写

Filter kind:
1 Butterworth
2 Chebyshev
3 Elliptic
 ? 3
Filter shape:
1 low pass
2 band pass
3 high pass
4 band stop
 ? 1
Order of filter = 8.000000000E+000 ? 8.000000000E+000
Passband ripple, db = 5.000000000E-001 ? 5.000000000E-001
Sampling frequency = 1.000000000E+004 ? 1.000000000E+004
Passband edge = 2.000000000E+003 ? 2.000000000E+003
Stop band edge or -(db down) = -4.000000000E+001 ? 2.200000000E+003
pass band 2.000000000E+003
stop band 2.200000000E+003
dbdown 6.202677896E+001
theta 6.143066525E+001, rho 3.297712266E-001
consistency check: n= 8.00000000000000E+000
phi 1.2347351e+000 m 9.9999992e-001 u 1.7741350e+000
consistency check: sn/cn = 2.862775161E+000 = 2.862775161E+000 = 1/eps
s plane poles:
-1.927691369E-002 1.003153142E+000
-7.479722850E-002 9.312720902E-001
-1.770755563E-001 7.253219308E-001
-2.971243308E-001 2.911868492E-001
s plane zeros:
0.000000000E+000 1.148722488E+000
0.000000000E+000 1.251521081E+000
0.000000000E+000 1.649651612E+000
0.000000000E+000 4.238971508E+000
order = 8
constant gain factor    1.0840655180824E-002
z plane Denominator      Numerator
 0  1.000000000E+000  1.084065518E-002
 1 -3.391052594E+000  1.549626463E-002
 2  7.134281988E+000  3.865495125E-002
 3 -9.896096826E+000  4.450145413E-002
 4  1.003199389E+001  5.605504248E-002
 5 -7.367386257E+000  4.450145413E-002
 6  3.870315688E+000  3.865495125E-002
 7 -1.331104152E+000  1.549626463E-002
 8  2.403871958E-001  1.084065518E-002
poles and zeros with corresponding quadratic factors
pole     3.0050282041410E-001    9.3475816516366E-001
q. f.
z**2    9.6407477241696E-001
z**1   -6.0100564082819E-001
f0  2.00496167E+003  gain  2.9238E+001  DC gain  7.3364E-001

zero     1.7886295237392E-001    9.8387399816648E-001
q. f.
z**2    1.0000000000000E+000
z**1   -3.5772590474783E-001
f0  2.21379064E+003  gain  0.0000E+000  DC gain  1.6423E+000

pole     3.4359234727589E-001    8.6222990073651E-001
q. f.
z**2    8.6149610283065E-001
z**1   -6.8718469455178E-001
f0  1.89647438E+003  gain  7.7713E+000  DC gain  8.5156E-001

zero     9.4812934331468E-002    9.9549510670995E-001
q. f.
z**2    1.0000000000000E+000
z**1   -1.8962586866294E-001
f0  2.34887352E+003  gain  0.0000E+000  DC gain  1.8104E+000

pole     4.5485983469708E-001    6.7928588973665E-001
q. f.
z**2    6.6832678921597E-001
z**1   -9.0971966939416E-001
f0  1.56092091E+003  gain  3.6204E+000  DC gain  1.3182E+000

zero    -1.7915144898580E-001    9.8382150735095E-001
q. f.
z**2    1.0000000000000E+000
z**1    3.5830289797161E-001
f0  2.78667606E+003  gain  0.0000E+000  DC gain  2.3583E+000

pole     5.9657129472731E-001    2.7780031562240E-001
q. f.
z**2    4.3307032505252E-001
z**1   -1.1931425894546E+000
f0  6.93599589E+002  gain  3.8206E+000  DC gain  4.1679E+000

zero    -8.0925359252588E-001    5.8745946497096E-001
q. f.
z**2    1.0000000000000E+000
z**1    1.6185071850518E+000
f0  4.00064082E+003  gain  0.0000E+000  DC gain  3.6185E+000

       0.0       -0.50
     250.0       -0.34
     500.0       -0.05
     750.0       -0.07
    1000.0       -0.42
    1250.0       -0.39
    1500.0       -0.01
    1750.0       -0.45
    2000.0       -0.50
    2250.0      -62.26
    2500.0      -62.05
    2750.0      -77.70
    3000.0      -64.80
    3250.0      -62.03
    3500.0      -63.64
    3750.0      -69.04
    4000.0     -121.00
    4250.0      -69.80
    4500.0      -64.77
    4750.0      -62.65
    5000.0      -62.03
Filter kind:
1 Butterworth
2 Chebyshev
3 Elliptic
 ? 3
Filter shape:
1 low pass
2 band pass
3 high pass
4 band stop
 ? 1
Order of filter = 8.000000000E+000 ? 8.000000000E+000
Passband ripple, db = 5.000000000E-001 ? 5.000000000E-001
Sampling frequency = 1.000000000E+004 ? 1.000000000E+004
Passband edge = 2.000000000E+003 ? 2.000000000E+003
Stop band edge or -(db down) = 2.200000000E+003 ? -6.000000000E+001
pass band 2.000000000E+003
stop band 2.180164562E+003
dbdown 6.000000000E+001
theta 6.280629744E+001, rho 3.297712266E-001
consistency check: n= 8.00000000000000E+000
phi 1.2347351e+000 m 9.9999988e-001 u 1.7741349e+000
consistency check: sn/cn = 2.862775161E+000 = 2.862775161E+000 = 1/eps
s plane poles:
-1.825256742E-002 1.003041786E+000
-7.215168900E-002 9.348042858E-001
-1.757104177E-001 7.340660415E-001
-3.019633977E-001 2.974206062E-001
s plane zeros:
0.000000000E+000 1.133709501E+000
0.000000000E+000 1.230664578E+000
0.000000000E+000 1.611118198E+000
0.000000000E+000 4.113093373E+000
order = 8
constant gain factor    1.2188790404556E-002
z plane Denominator      Numerator
 0  1.000000000E+000  1.218879040E-002
 1 -3.364282978E+000  1.588854457E-002
 2  7.075982357E+000  4.177200615E-002
 3 -9.800072097E+000  4.596798103E-002
 4  9.940978550E+000  5.968570227E-002
 5 -7.303530458E+000  4.596798103E-002
 6  3.843943964E+000  4.177200615E-002
 7 -1.324945474E+000  1.588854457E-002
 8  2.405082985E-001  1.218879040E-002
poles and zeros with corresponding quadratic factors
pole     3.0090534326741E-001    9.3563039641420E-001
q. f.
z**2    9.6594826430107E-001
z**1   -6.0181068653482E-001
f0  2.00477340E+003  gain  3.0848E+001  DC gain  7.3306E-001

zero     1.9156690279480E-001    9.8147955748126E-001
q. f.
z**2    1.0000000000000E+000
z**1   -3.8313380558961E-001
f0  2.19321553E+003  gain  2.1793E-016  DC gain  1.6169E+000

pole     3.4163026479289E-001    8.6581471996732E-001
q. f.
z**2    8.6634636713455E-001
z**1   -6.8326052958578E-001
f0  1.90186016E+003  gain  8.0426E+000  DC gain  8.4525E-001

zero     1.1143915147524E-001    9.9377125915297E-001
q. f.
z**2    1.0000000000000E+000
z**1   -2.2287830295047E-001
f0  2.32226992E+003  gain  0.0000E+000  DC gain  1.7771E+000

pole     4.4937936873351E-001    6.8548767989004E-001
q. f.
z**2    6.7183517632435E-001
z**1   -8.9875873746701E-001
f0  1.57646366E+003  gain  3.6360E+000  DC gain  1.2935E+000

zero    -1.5618140397264E-001    9.8772838829971E-001
q. f.
z**2    1.0000000000000E+000
z**1    3.1236280794528E-001
f0  2.74959223E+003  gain  0.0000E+000  DC gain  2.3124E+000

pole     5.9022651217393E-001    2.8180501843627E-001
q. f.
z**2    4.2778140408887E-001
z**1   -1.1804530243479E+000
f0  7.08951410E+002  gain  3.7152E+000  DC gain  4.0432E+000

zero    -7.9859336730431E-001    6.0187094438721E-001
q. f.
z**2    1.0000000000000E+000
z**1    1.5971867346086E+000
f0  3.97211078E+003  gain  0.0000E+000  DC gain  3.5972E+000

       0.0       -0.50
     250.0       -0.34
     500.0       -0.05
     750.0       -0.06
    1000.0       -0.41
    1250.0       -0.41
    1500.0       -0.00
    1750.0       -0.48
    2000.0       -0.50
    2250.0      -60.47
    2500.0      -60.12
    2750.0     -114.85
    3000.0      -61.85
    3250.0      -60.03
    3500.0      -62.12
    3750.0      -68.22
    4000.0      -86.44
    4250.0      -67.11
    4500.0      -62.56
    4750.0      -60.58
    5000.0      -60.00
Filter kind:
1 Butterworth
2 Chebyshev
3 Elliptic
 ? 3
Filter shape:
1 low pass
2 band pass
3 high pass
4 band stop
 ? 3
Order of filter = 8.000000000E+000 ? 5.000000000E+000
Passband ripple, db = 5.000000000E-001 ? 3.000000000E-001
Sampling frequency = 1.000000000E+004 ? 6.500000000E+003
Passband edge = 2.000000000E+003 ? 2.000000000E+003
Stop band edge or -(db down) = -6.000000000E+001 ? -4.000000000E+001
pass band 2.000000000E+003
stop band 1.724771489E+003
dbdown 4.000000000E+001
theta 4.948625017E+001, rho 2.583518903E-001
consistency check: n= 5.00000000000000E+000
phi 1.3094805e+000 m 9.9999285e-001 u 2.0294374e+000
consistency check: sn/cn = 3.739283185E+000 = 3.739283185E+000 = 1/eps
s plane poles:
-7.421364798E-002 9.692942499E-001
-4.674494632E-001 1.118413315E+000
-1.876761129E+000 0.000000000E+000
s plane zeros:
0.000000000E+000 7.358867606E-001
0.000000000E+000 5.080188218E-001
0.000000000E+000 0.000000000E+000
order = 5
constant gain factor    5.0917901348459E-002
z plane Denominator      Numerator
 0  1.000000000E+000  5.091790135E-002
 1  1.843590052E+000 -7.468100947E-002
 2  2.477255271E+000  1.217277891E-001
 3  1.821912471E+000 -1.217277891E-001
 4  8.836953055E-001  7.468100947E-002
 5  2.007946539E-001 -5.091790135E-002
poles and zeros with corresponding quadratic factors
pole    -3.0748905634184E-001    8.7806233202498E-001
q. f.
z**2    8.6554297869115E-001
z**1    6.1497811268369E-001
f0  1.97346803E+003  gain  7.8795E+000  DC gain  4.0314E-001

zero    -6.3934834577010E-002    9.9795407556040E-001
q. f.
z**2    1.0000000000000E+000
z**1    1.2786966915402E-001
f0  1.69118619E+003  gain  0.0000E+000  DC gain  2.1279E+000

pole    -3.8319850009799E-001    5.9587046184977E-001
q. f.
z**2    5.0190269778241E-001
z**1    7.6639700019598E-001
f0  2.21622333E+003  gain  2.3727E+000  DC gain  4.4086E-001

zero     2.9728211999721E-001    9.5478968423939E-001