Integrated circuit that performs multiple communication tasks

US5621800A · kind A · utility

Assignee

• Motorola, Inc. · US

Inventors

• Chia-Shiann Weng · Austin, US
• Walter U. Kuenast · Austin, US
• Paul Astrachan · Austin, US
• Donald C. Anderson · Austin, US
• Peter C. Curtis · Austin, US
• Jose G. Corleto · Austin, US

Key dates

• Filing date: Nov 1, 1994
• Grant date: Apr 15, 1997
• Expiry date: Nov 1, 2014

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M9/082
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An integrated circuit that provides multiple communication functions is accomplished by providing an integrated circuit (24) that includes memory (70) which stores an audio code algorithm, echo cancellation information, a modem processing algorithm, and audio data. The memory (70) is coupled via a data bus (50) to a signal converter (56), a central processing unit (58), and a first co-processor (72). The signal converter (56) provides an analog-to-digital input port (78) and a digital-to-analog output port (80) for the integrated circuit (24), wherein the audio data is received via the analog-to-digital input port (78). The central processing unit (58) executes at least a first portion of the audio coding algorithm upon the audio data and executes a first portion of the modem processing algorithm, while the first co-processor (72) executes an echo cancellation algorithm.