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. 07, 1989
Filed:
Dec. 09, 1985
Kazuhiro Daikoku, Tokyo, JP;
Shigeaki Ogose, Tokyo, JP;
Nippon Telegraph and Telegraph Corporation, Tokyo, JP;
Abstract
A SSB (single sideband) single accompanied by a carrier component is demodulated by the following process: If the carrier level in receiving signals is lower than the SSB signal's, the carrier must be amplified up to the level which is higher than that of the SSB signal. Amplitude variations of SSB signals are completely removed by an amplitude limiter. The output of the amplitude limiter is demodulated by a frequency detector and an equalizer which makes the frequency response flat. A linearizer is employed for demodulated signals to eliminate higher order distortions of the signal. The linearizer may be omitted when a pre-distortion circuit is introduced in a transmitter of the system.