Title:
AUTOMATIC FREQUENCY CONTROL UNIT
Document Type and Number:
Japanese Patent JPS52120661
Kind Code:
A
Abstract:
PURPOSE: To ensure the accuracy of freuqnecy, by opening the control loop and giving a fixed voltage to the voltage control type oscilaltor, and preventing the oscillator runaway, when external frequency to the automatic frequency control unit used for carrier pilot telephone unit fluctuates more than a constant range.
Inventors:
SAWADA KAORU
IGAWA SHIGERU
IGAWA SHIGERU
Application Number:
JP3753076A
Publication Date:
October 11, 1977
Filing Date:
April 02, 1976
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
H03L7/14; H03L7/08; H03L7/10; (IPC1-7): H03B3/06