Single chip telephone answering machine, telephone, speakerphone

Details Single chip telephone answering machine, telephone, speakerphone Single chip telephone answering machine, telephone, speakerphone

1994-01-24

1996-01-09

Hofsass, Jeffery A.

Telephonic communications

Audio message storage, retrieval, or synthesis

379357, 379201, 379 88, 379 89, H04M 164

Patent

active

054835771

ABSTRACT:
The invention provides a single chip digital answering machine, telephone, speakerphone and analog display services interface controller circuit. The invention includes a telephone controller including a controller which includes a memory interface for controlling storage in and retrieval of data from a memory; a single digital processor for converting the electrical signals representative of an audible input to digital data and for converting digital data to electrical signals representative of an audible output; a telephone line interface for coupling the digital signal processor to the telephone line and a user interface for coupling the telephone line interface to a speaker and a microphone. The controller, the digital signal processor, the telephone line interface and the user interface are all integrated within a common integrated circuit.

REFERENCES:
patent: 5329579 (1994-07-01), Brunson
Bursky, Dave; Standard-Cell Digital Chips Get More Support; Help is Coming from Libraries, Compilers, Synthesizers, Simulation Tools, vol. 38, No. 12, p. 61, Electronic Design, Jun. 28, 1990.
Harold, Peter; Core Microprocessors; EDN Special Report; Technical, vol. 34, No. 3, p. 130, EDN Magazine, Feb. 2, 1989.
"Digital Is the Message on Answering Machines", Sandbank, Electronic Engineering Times, Sep. 27, 1993, pp. 69-70.
Matsuo et al., "Personal Telephone Services Using IC-Cards", IEEE Communications, Jul. 1989, pp. 41-48.

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