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M658489BFP

SINGLE CHIP SURROUND PROCESSOR

MITSUBISHI ELECTRIC  

MITSUBISHI SOUND PROCESSOR ICs

50SERIES

M65849BFP

SINGLE CHIP SURROUND PROCESSOR

The LPF Of The Input & Output Stage Of The Digital Delay

The circuit of the LPF is as follows.

C2

C1

C1,C2:External C

Internal of IC

11 or 19 pin

12 or 20 pin

SD 10kΩ

13 or 21 pin

SD 10kΩ

SD 10kΩ

INPUT

LD

24kΩ

LD

24kΩ

The accuracy of the internal resisters are about ±30%.

LAD

24kΩ

-

+

OUTPUT

DELAY TIME

SW

9.2 ~ 49.2 ms

98.3 ~ 196.6 ms

SD

(SHORT DELAY)

LD

(LONG DELAY)

* The cut off frequency is calculated by the following formulas.

•Surround

fc=

•Echo

fc=

1

2 x10kΩx

C1xC2

1

2 x24kΩx

C1xC2

The quality factor (Q) is as follows under the conditions of both Short Delay & Long Delay.

1 C1

Q=

3 C2

At all the cut off frequency is decided by the external C.

We recommend C1=0.0047µF and C2=0.001µF.

Under this condition, fc and Q are as follows.

Surround fc=7.3kHz Q=0.72

Echo

fc=3.1kHz

* The Cut Off Frequency of LPF means the cut off frequency of the each stage (A/D & D/A)

and doesn't mean the total cut off frequency.

MITSUBISHI

ELECTRIC

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