The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 1995
Filed:
Sep. 14, 1993
David G England, Phoenix, AZ (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A communications analog front end which functions as an analog and digital interface in combination with a microcontroller, DSP and the telephone or cellular network, with the DSP and microcontroller for coupling to the local workstation. The invention provides independent control of a digital and audio channel, with each channel having its own A/D and D/A converter pairs, separate programmable gain and attenuation on each channel, separate sample rates (e.g., from 1.2 kHz to 44.1 kHz at 8/16 bit resolutions) for the A/D converters, two low power, high stability on-chip oscillators, sample buffering on the audio channel (256 byte FIFOs) and, independent control of programmability of D/A output voltage levels, the A/D converters, and the D/A converters. The invention is for use in a system which enables a user to communicate between a local workstation, which may or may not be connected to a local area network (LAN), and a remote workstation, which may be coupled to its own LAN, via a modem over a telephone line network or a cellular network or as a standalone unit, i.e., not coupled to the local workstation, to perform certain tasks which are not processor intensive such as, for example, retrieval of E-mail messages from the remote workstation.