JPS5593369A - Detector for control signal - Google Patents

Detector for control signal

Info

Publication number
JPS5593369A
JPS5593369A JP159779A JP159779A JPS5593369A JP S5593369 A JPS5593369 A JP S5593369A JP 159779 A JP159779 A JP 159779A JP 159779 A JP159779 A JP 159779A JP S5593369 A JPS5593369 A JP S5593369A
Authority
JP
Japan
Prior art keywords
control signal
frequency
signal
enters
detection circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP159779A
Other languages
Japanese (ja)
Other versions
JPS6159029B2 (en
Inventor
Yoshito Desaki
Yasuhiro Sugihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP159779A priority Critical patent/JPS5593369A/en
Publication of JPS5593369A publication Critical patent/JPS5593369A/en
Publication of JPS6159029B2 publication Critical patent/JPS6159029B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Facsimiles In General (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

PURPOSE: To enable not to regard the signal as the true control signal, if the level other than the essential control signal frequencies is greater, by monitoring the area other than the frequency not only the frequency of control signal.
CONSTITUTION: The incoming control signal is inputted from the terminal 1. This input signal enters the frequency detection circuit 2 and the single frequency component of incoming control signal is detected. On the other hand, the control signal inputted enters also the control signal frequency rejection filter 3 to reject the control signal itself. The output of the control signal frequency rejection filter 3 enters the band pass filter 4 to be subject to the band limit. The output of the band pass filter 4 is discriminated for whether it is greater or smaller than the specified level at the average level detection circuit 5, and the result of discrimination performs output control of the frequency detection circuit 2. Accordingly, the malfunction that the audio signals are mistaken as control signal and the control signal detection signal is made, can be avoided.
COPYRIGHT: (C)1980,JPO&Japio
JP159779A 1979-01-10 1979-01-10 Detector for control signal Granted JPS5593369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP159779A JPS5593369A (en) 1979-01-10 1979-01-10 Detector for control signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP159779A JPS5593369A (en) 1979-01-10 1979-01-10 Detector for control signal

Publications (2)

Publication Number Publication Date
JPS5593369A true JPS5593369A (en) 1980-07-15
JPS6159029B2 JPS6159029B2 (en) 1986-12-15

Family

ID=11505902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP159779A Granted JPS5593369A (en) 1979-01-10 1979-01-10 Detector for control signal

Country Status (1)

Country Link
JP (1) JPS5593369A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187866A (en) * 1987-01-30 1988-08-03 Mitsubishi Electric Corp Facsimile communication control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187866A (en) * 1987-01-30 1988-08-03 Mitsubishi Electric Corp Facsimile communication control system

Also Published As

Publication number Publication date
JPS6159029B2 (en) 1986-12-15

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