Apparatus and method for simplified analog signal record and pla

Details Apparatus and method for simplified analog signal record and pla Apparatus and method for simplified analog signal record and pla

1997-07-17

1999-04-27

Nelms, David

Static information storage and retrieval

Analog storage systems

365 33, G11C 2700

Patent

active

058986057

ABSTRACT:
A complete voice record and playback system capable of being powered by a single 1.8 VDC battery is operated in either stand-alone or CPU modes. In the stand-alone mode, two-button operation controls record, play, and memory erase functions. In CPU mode, commands may be provided through a serial interface which directly control record, playback, specialized memory management functions, and power amplifier gain settings. Through a serial interface, the system may be set up to directly write to external memory, using an analog signal generated by a microphone or other analog input device, or may instead be set up so that digital data provided by an external CPU and converted to analog using the on-chip D/A converter may be output by the speaker in real-time.

REFERENCES:
patent: 4890259 (1989-12-01), Simko
patent: 4989179 (1991-01-01), Simko
patent: 5126967 (1992-06-01), Simko
patent: 5220531 (1993-06-01), Blyth et al.
patent: 5241494 (1993-08-01), Blyth et al.
patent: 5294819 (1994-03-01), Simko
patent: 5561530 (1996-10-01), Kanazawa

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