CS5378 Просмотр технического описания (PDF) - Cirrus Logic

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производитель

CS5378

Low-power Single-channel Decimation Filter

Cirrus Logic 

CS5378

Filter Type

SINC1

5th order decimate by 8

36 coefficients

Filter Type

SINC2 (Stage 1)

SINC2 (Stage 2)

4th order decimate by 2

5 coefficients

SINC2 (Stage 3)

5th order decimate by 2

6 coefficients

SINC2 (Stage 4)

6th order decimate by 2

7 coefficients

System Function

H

(z)

=

⎜⎜⎝⎛

1−

1−

z −8

z −1

⎟⎟⎠⎞5

Filter Coefficients

h0 = 1

h1 = 5

h2 = 15

h3 = 35

h4 = 70

h5 = 126

h6 = 210

h7 = 330

h8 = 490

h9 = 690

h10 = 926

h11 = 1190

h12 = 1470

h13 = 1750

h14 = 2010

h15 = 2226

h16 = 2380

h17 = 2460

h18 = 2460

h19 = 2380

h20 = 2226

h21 = 2010

h22 = 1750

h23 = 1470

h24 = 1190

h25 = 926

h26 = 690

h27 = 490

h28 = 330

h29 = 210

h30 = 126

h31 = 70

h32 = 35

h33 = 15

h34 = 5

h35 = 1

System Function

H

(z)

=

⎜⎜⎝⎛

1

1

−

−

z −2

z −1

⎟⎟⎠⎞ 4

H

(z)

=

⎜⎜⎝⎛

1

1

−

−

z −2

z −1

⎟⎟⎠⎞5

H

(z)

=

⎜⎜⎝⎛

1

1

−

−

z −2

z −1

⎟⎟⎠⎞ 6

Filter Coefficients

h0 = 1

h1 = 4

h2 = 6

h3 = 4

h4 = 1

h0 = 1

h1 = 5

h2 = 10

h3 = 10

h4 = 5

h5 = 1

h0 = 1

h1 = 6

h2 = 15

h3 = 20

h4 = 15

h5 = 6

h6 = 1

DS639F2

Table 12. SINC1 and SINC2 Filter Coefficients

42

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