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. 28, 1990
Filed:
Sep. 18, 1989
Yukinobu Ishigaki, Machida, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
There is disclosed a spread spectrum communication system comprising a modulation unit provided in the transmission side for transmitting a composite spread spectrum signal after modulating an information signal by the first and second carrier, and a demodulation unit in the reception side having an automatic gain control (AGC) function and for demodulating a primary-modulated signal by spread code generated therein or despreading. The demodulating unit comprises an input circuit for receiving the composite spread spectrum signal, a control circuit for controlling a level of the composite spread spectrum signal, a separating circuit for separating a spread code signal and a spread spectrum signal from the composite signal, a circuit for generating the primary-modulated signal based on the spread code, a detecting circuit for detecting an envelope signal of the demodulated primary-modulated signal from the generating circuit, a converting circuit for converting the envelope signal into a control signal, and a supplying circuit for supplying the control signal to the control circuit.