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. 14, 1984
Filed:
Aug. 28, 1981
Applicant:
Inventor:
Arthur L Serrano, Canoga Park, CA (US);
Assignee:
Novation, Inc., Chatsworth, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375-9 ; 375 88 ; 329112 ;
Abstract
Integrated circuit universal frequency shift keyed modems using switched capacitor recursive filters are disclosed. The modems are comprised of two integrated circuits, the first providing the transmitting capability for any of a plurality of conventional transmit modes and the second providing a receive capability for the corresponding modes, including all filtering on chip as is required prior to detection. In this manner, any of a number of conventional modems may be realized using the two chip set and a minimum of external circuitry. Because of the versatility of the chip set, other functions and objectives may be achieved by the use thereof.