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:
Jul. 26, 1988
Filed:
Mar. 26, 1986
Kaveh Kianush, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An SSB pulse modulator which attenuates unwanted even harmonics of the carrier frequency without expensive filtering. The modulator comprises two pairs of comparators (12, 14 and 16, 18), and the sine and cosine components of the carrier signal are modulating signal [a(t)] and the Hilbert transform [a(t)] thereof are applied to respective ones of the comparators. EX-OR gates (20, 22) multiply together the outputs of each pair of comparators (12, 14 and (16, 18), the multiplied outputs being combined with each other in a signal combining arrangement (24). Each pair of the comparators produces the unwanted even harmonics, which are then attenuated by subtraction from each other in the combining arrangement.