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MSM9836-XXX

Voice Synthesis IC with Built-in Mask ROM

Oki Electric Industry 

¡ Semiconductor

MSM9836-xxx

6. Low-Pass Filter

In this IC, all voice outputs are through the built-in low-pass filter (LPF). Figure 4 and Table 4

show the LPF frequency characteristics and LPF cutoff frequency respectively.

Only the voice output through LPF is enabled in this IC.

[dB] 20

10

0

–10

–20

–30

–40

–50

–60

–70

–80

10

100

1k

10k

[Hz]

Figure 4 LPF Frequency Characteristics (fSAM=8 kHz)

Table 4 LPF Cutoff Frequency

Sampling Frequency (kHz)

(fSAM)

4.0

5.3

6.4

8.0

10.6

12.8

16.0

Cutoff Frequency (kHz)

(fCUT)

1.2

1.6

2.0

2.5

3.2

4.0

5.0

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