| 摘要 |
The ADPCM type voice analyzing/synthesizing circuit comprises a pre- amplifier (1), a low band pass filter (2), a level shifter (3), a sample/holder (4), a buffer (5), an A/D converter (6), a tristate buffer (7), a shift register (8), a voice analyzing/ synthesizing circuit (9), a clock generator (10), a keyboard (11), a system controller (12), an interfacing circuit (13), a memory interfacing circuit (14), a memory (15), a voice signal detector (16), and a speaker (17). The memory (15) stores the voice data analyzed/ synthesized in the voice circuit (9). |
