NJM2706 查看數據表（PDF） - Japan Radio Corporation

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NJM2706

3D Surround Audio Processor with Dynamic Bass Boost

Japan Radio Corporation  

NJM2706

1-3. Adjusting the Summing Level for ealaBASS effect to L/R Output Signal

Changing the resistance value connected between the terminal 8 and 9 can modify the Summing Level for the

ealaBASS effect to the L/R Output Signal.

2. Adjusting the High Frequency Compensation Filter

The NJM2706 has High Frequency Compensation Filter, which can produce well balance between boosted–bass

frequency range and treble frequency range. This picture shows the equivalent circuit for the High Frequency

Compensation Filter.

15k

20pi n

HFF IL

R6

30k

C11

560p

* The pin numbers apply in DMP24 and SSOP24's case.

The Cut-off Frequency fCH and the Voltage Gain GVH are defined as below:

fCH=

1

2πCR

=

1

2π×C11×R6

GVH= 20log

R6+15k

R6

In the typical application circuit shown on the page 9, the High Frequency Compensation Filter Cut-off Frequency

fCH is set to 10kHz and Voltage Gain GVH is set to 3.5dB.

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