CODE CONVERTER WITH CONFIDENTIALITY CONTROL TERMINAL

Title:

CODE CONVERTER WITH CONFIDENTIALITY CONTROL TERMINAL

Document Type and Number:

Japanese Patent JPS59219050

Kind Code:

A

Abstract:

PURPOSE: To miniaturize the hardware by constituting a ciphering device and a decoding device into one chip while incorporating respectively them in an A/D converter and a D/A converter.

CONSTITUTION: A buffer is provided to the pre-stage of an output of a digital signal (d) of the A/D converter 1 converting an analog signal (a) into the digital signal (d), bit conversion is attained by a control input (c) so as to provide confidentiality. Further a buffer is provided to the post-stage of the digital signal (d) of the D/A converter 2 converting the digital signal (d) into the analog signal (a) and bit conversion is attained by the control input (c) so as to provide the confidentiality.

More Like This:

JP5649874	Methods and systems for validating changes in medical practice, methods, and product selection
JP4217381	Information embedding extraction device and method for analog signals using replication modulation

Inventors:

AMANO FUMIO
AKIYAMA RIYOUTA
FUKUDA HARUKI

Application Number:

JP9335383A

Publication Date:

December 10, 1984

Filing Date:

May 28, 1983

Export Citation:

Click for automatic bibliography generation Help

Assignee:

FUJITSU LTD

International Classes:

H04K1/00; H04L9/18; (IPC1-7): H04L9/00; H04K1/00

Domestic Patent References:

JPS5453903A

1979-04-27

Attorney, Agent or Firm:

Aoki Akira

Previous Patent: FRAME SYNCHRONIZATION SYSTEM

Next Patent: DATA TRANSMISSION EQUIPMENT