公开(公告)号：US3584304A

公开(公告)日：1971-06-08

申请号：US3584304D

申请日：1969-06-11

Applicant: MOTOROLA INC

Inventor： CASTERLINE BURNHAM ,  CHAPMAN RONALD H

IPC: H03G3/00 ,  H03G3/34 ,  H04B1/10

CPC classification number: H03G3/005 ,  H03G3/34 ,  H03G3/344

Abstract: A radio receiver which incorporates dual squelch systems, one system operated by the carrier and the other operated by a coded tone signal, is responsive to the tone signal of the proper frequency to operate the tone coded squelch system and temporarily disable the carrier squelch system when the receiver is in the carrier squelch mode. By permitting the tone coded squelch system to disable the carrier squelch when the proper tone signal is received, noise bursts or squelch tails at the end of a transmission are eliminated.

公开(公告)号：CA770241A

公开(公告)日：1967-10-24

申请号：CA770241D

Applicant: MOTOROLA INC

Inventor： ESCHBAUGH ROBERT V ,  CASTERLINE BURNHAM ,  CHAPMAN RONALD H