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:
Feb. 12, 1985
Filed:
Sep. 30, 1982
Applicant:
Inventor:
Norman W Parker, Wheaton, IL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06G / ; H03D / ;
U.S. Cl.
CPC ...
329 50 ; 329122 ; 329124 ; 329135 ; 328158 ; 455214 ; 455337 ;
Abstract
A baseband discriminator decodes a pair of trigonometric transform function signals, sin f(t) and cos f(t), to provide an original audio signal f(t) by first deriving the derivative of the audio signal from the pair of trigonometric signals and integrating that derivative. The discriminator is used in a new system of SSB transmission termed 'transform modulation' and also in FM transmission.