Scrambler system

Details Scrambler system Scrambler system

1985-10-28

1988-12-06

Cangialosi, Salvatore

Cryptography

Cryptanalysis

380 39, H04K 102

Patent

active

047900091

ABSTRACT:
A scrambler system comprises in a transmitter part thereof as oscillator circuit for generating a local oscillation signal, a frequency dividing circuit for obtaining a frequency divided signal by frequency-dividing the local oscillation signal by 1/N, a triangular wave signal generating circuit for converting the frequency divided signal into a triangular wave signal and for controlling the oscillation frequency of the oscillator circuit by the triangular wave signal, a multiplying circuit for obtaining a frequency converted audio signal by multiplying the local oscillation signal with an input audio signal which is to be scrambled, a pilot signal generating circuit for generating from the frequency divided signal a pilot signal having a single frequency, and an adding circuit for obtaining a scrambled signal for transmission by adding the pilot signal and the frequency converted audio signal. A key is used for de-scrambling the scrambled signal in a receiver part of the scrambler system.

REFERENCES:
patent: 3696207 (1972-10-01), Lundin et al.
patent: 3821659 (1974-06-01), Ludwig
patent: 3824468 (1974-07-01), Zegers et al.
patent: 3838342 (1974-09-01), Bjorkman
patent: 3942115 (1976-03-01), Wolejsza, Jr.
patent: 4058677 (1977-11-01), Maitland et al.
patent: 4133977 (1979-01-01), McGuire et al.
patent: 4206462 (1980-06-01), Rabow et al.
patent: 4231113 (1980-10-01), Blasbalg
patent: 4276652 (1981-06-01), McCalmont et al.
patent: 4278840 (1981-07-01), Morgan et al.
patent: 4351064 (1982-09-01), Ewanus
patent: 4447792 (1984-05-01), Wynn
patent: 4517531 (1985-05-01), Tan et al.
patent: 4581765 (1986-04-01), Stec

Affiliated with

Also associated with

Rating

Scrambler system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scrambler system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scrambler system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1497671