µPC1876

16

Data Sheet S11666EJ4V0DS00

(2) 408 Hz LPF

A de-emphasis filter. The transfer function is as follows:

Tf

j

f

k

j

f

()

.

=

+

+

1

523

1

408

(3) Variable emphasis

Also called spectral VCA and controlled by the spectral RMS. The transfer function is as follows:

Sf b

j

f

k

b

b

j

f

kb

−

=

+⋅ +

+

+⋅ +

+

1

1

20 1

151

1

1

20 1

151

1

(,

)

.

.

b: Variable transferred from the spectral RMS for controlling

(4) Wide band VCA

A VCA whose operating frequency range is mainly low to mid frequencies and controlled by the wide band RMS.

The transfer function is as follows:

a: Variable transferred from the wide-band RMS for controlling

(5) 2.19 kHz LPF

A de-emphasis filter. The transfer function is as follows:

Tf

j

f

k

j

f

k

()

.

.

=

+

+

1

625

1

219

(6) Spectral RMS filter

A filter that limits the band width of the signal input to the RMS which controls the variable emphasis. The transfer

function is as follows:

Tf

j

f

k

j

f

k

j

f

k

j

f

k

j

f

k

()

.

.

.

.

.

=









++ 







⋅

+

766

1

731

7 66

392

1

392

2

2

(7) Wide-band RMS filter

A filter that limits the band width of the signal input to the wide-band RMS which controls the wide band VCA.

The transfer function is as follows:

Tf

j

f

k

()

.

=

+

1

1

209