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NJW1164

AUDIO PROCESSOR with BBE

Japan Radio Corporation  

PRELIMINARY

2. Tone Control

a) Bass: Setting the Cut-off frequency

Bass Filter

12k 12k

8pin

23pin

C

b) Treble: Setting the Cut-off frequency

Treble Filter

fC

=

2π

M

×C ×12k

M changes by gain setting of Tone.

M ≈ 2.65

M ≈ 3.45

M ≈ 8.10

(±15dB)

(±10dB)

(±5dB)

10k

7pin

24pin

C

fC

=

2π

N

× C ×10k

N changes by gain setting of Tone.

N ≈ 0.76

N ≈ 0.58

N ≈ 0.25

(±15dB)

(±10dB)

(±5dB)

NJW1164

3. BBE, Surround mode and "OUT" switch settings

The click noise may be generated by changing the BBE, Surround mode setting and “OUT” switch.

Provide the external circuit for avoiding the click noise on above condition.

4. External parts for BBE circuits

The constant of capacitors connected to the terminals No.2, 3, 28 and 29 are designated by BBE Sound Inc.

Do not change the constant of these capacitors without the approval of BBE Sound Inc.

5. AUX1, AUX0 Terminal

AUX1/0 are enable to control external logic circuit is

Source current

: 1mA typ. (Ta=25ûC)

Sink current

: 0.5mA typ. (Ta=25ûC)

6. Capacitor for Reference Voltage (21pin)

22µF should be recommended for ripple filter connected to Vref terminal (21pin).

Reducing this capacity may cause to reduce the maximum attenuation level and to increase the output

noise.

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