msm6722gs-k Oki Semiconductor, msm6722gs-k Datasheet

msm6722gs-k

Manufacturer Part Number

msm6722gs-k

Description

Pitch Control Ic For The Speech Signal

Manufacturer

Oki Semiconductor

Datasheet

1.MSM6722GS-K.pdf (19 pages)

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E2D0046-39-21

¡ Semiconductor

MSM6722

1. Speech pitch step reset (UP/DW mode)

2. Change in pitch

Pitch Control IC for The Speech Signal

GENERAL DESCRIPTION

The MSM6722 converts in real-time the pitch of the speech signal in a range of one octave upward

or downward.

Two pitch control methods can be selected. One is to change the pitch in 17 steps by two switch

inputs, and the other is to select one of 16 steps by four binary input lines.

Since a microphone preamplifier and a low-pass filter are built in, the pitch conversion set can

easily be configured by connecting a microphone, amplifier, and speaker in the peripheral

circuit. The MSM6722 is functionally compared to the MSM6322, as described below.

3. Additional THR/CHA pin

MSM6322 ·············· PRST pin only

MSM6722 ·············· PRST pin and UP•C (DW•C) pin available.

MSM6322 ·············· Speech pitch is changeable in 17 steps.

MSM6722 ·············· The pitch step does not change if a signal is input to the UP•C (DW•C)

This pin outputs a voice signal without passing the pitch conversion circuit including

ADC•DAC.

pin when the pitch step is 16 or 0.

Pitch step 16

Pitch step 8

Pitch step 0

Pitch step 16

Pitch step 8

Pitch step 0

UP, DW

Previous version: May. 1997

This version: Feb. 1999

MSM6722

1/18

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