JPS6367029A - Squelch control circuit - Google Patents

Squelch control circuit

Info

Publication number
JPS6367029A
JPS6367029A JP21196086A JP21196086A JPS6367029A JP S6367029 A JPS6367029 A JP S6367029A JP 21196086 A JP21196086 A JP 21196086A JP 21196086 A JP21196086 A JP 21196086A JP S6367029 A JPS6367029 A JP S6367029A
Authority
JP
Japan
Prior art keywords
time
comparator
output
squelch circuit
control 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.)
Pending
Application number
JP21196086A
Other languages
Japanese (ja)
Inventor
Norimasa Ejima
Original Assignee
Nec Corp
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 Nec Corp filed Critical Nec Corp
Priority to JP21196086A priority Critical patent/JPS6367029A/en
Publication of JPS6367029A publication Critical patent/JPS6367029A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To execute an operation control of a squelch circuit which is not influenced by an interference wave, by detecting a sudden drop of a receiving electric field monitor voltage and operating the squelch circuit.
CONSTITUTION: In a time difference deciding circuit 23 to which outputs of the first comparator 21 and the second comparator 22 are inputted, the time (T) extending from a variation of an output of the first comparator 21 to a variation of an output of the second comparator 22 is counted, and also, the time T is compared with the time (T0) and only when the time T is shorter than the time T0, a control for operating a squelch circuit is sent out of an output terminal Tout. In such a way, by catching a sudden change of a receiving electric field monitor voltage, it can be detected that the signal of a desired wave is disconnected.
COPYRIGHT: (C)1988,JPO&Japio
JP21196086A 1986-09-08 1986-09-08 Squelch control circuit Pending JPS6367029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21196086A JPS6367029A (en) 1986-09-08 1986-09-08 Squelch control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21196086A JPS6367029A (en) 1986-09-08 1986-09-08 Squelch control circuit

Publications (1)

Publication Number Publication Date
JPS6367029A true JPS6367029A (en) 1988-03-25

Family

ID=16614548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21196086A Pending JPS6367029A (en) 1986-09-08 1986-09-08 Squelch control circuit

Country Status (1)

Country Link
JP (1) JPS6367029A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03105074A (en) * 1989-09-18 1991-05-01 Toshiba Corp Hydraulic machinery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03105074A (en) * 1989-09-18 1991-05-01 Toshiba Corp Hydraulic machinery

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