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:
Aug. 24, 1982
Filed:
Apr. 15, 1980
Dennis M Monticelli, Fremont, CA (US);
William M Howard, Campbell, CA (US);
Robert S Sleeth, San Jose, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A communication system for providing both analog information pulses and digital information pulses in a single frame of a pulse train, including circuitry for sequentially multiplexing and modulating a first given number 'm' of analog information input channels to provide 'm' analog information pulses in each frame of the pulse train to convey information respectively representative of the analog information in the analog information input channels; and circuitry for modulating a second given number 'n' of binary information input channels to provide a variable number of digital information pulses and for multiplexing the variable number of digital information pulses in each frame of the pulse train sequentially to the analog information pulses, wherein the variable number of digital information pulses is within a range of 2.sup.n pulses to convey information respectively representative of the binary information in the 'n' binary information input channels. A system for producing analog information signals and binary information signals from such a pulse train includes a binary counter for counting the number of information pulses in each frame of the pulse train; 'm' gates coupled to given stages of the counter for producing 'm' analog information signals respectively conveying the analog information conveyed by the 'm' analog information pulses in each frame; and 'n' gates coupled to given stages of the counter for producing 'n' binary information signals containing binary information that is representative of the number of digital information pulses included in the count for each frame. The counter is reset by a sync pulse included in each frame of the pulse train the binary information is read from the counter in response to the sync pulse to produce the binary information signals.