JPS5474314A - Muting unit - Google Patents

Muting unit

Info

Publication number
JPS5474314A
JPS5474314A JP14199777A JP14199777A JPS5474314A JP S5474314 A JPS5474314 A JP S5474314A JP 14199777 A JP14199777 A JP 14199777A JP 14199777 A JP14199777 A JP 14199777A JP S5474314 A JPS5474314 A JP S5474314A
Authority
JP
Japan
Prior art keywords
frequency
divider
preset information
switch stage
muting
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
JP14199777A
Other languages
Japanese (ja)
Other versions
JPS5934018B2 (en
Inventor
Tomoaki Irimichi
Shuichi Ninomiya
Mamoru Kaneko
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 JP52141997A priority Critical patent/JPS5934018B2/en
Publication of JPS5474314A publication Critical patent/JPS5474314A/en
Publication of JPS5934018B2 publication Critical patent/JPS5934018B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Superheterodyne Receivers (AREA)
  • Noise Elimination (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE: To remove even transient tones generated momentarily at the time when a loop is unlocked, by making muting effective before the automatic frequency control loop is unlocked.
CONSTITUTION: This unit is provided with local oscillator 5 which controls the frequency of voltage control osicllator 11 corresponding to input preset information of variably frequency divider 13 and changes the output frequency of oscillation 11 into a local oscillation output. This unit consists of receiver circuit 3 which is connected to oscillator 11 and the external high-frequency input signal terminal and can extract sound output signals by mixing, amplifying and detecting high- frequency input signals sequentially, muting switch stage 8 which cuts off the sound output signal path of circuit 3, variable frequency divider and control circuit 19 which sends out intermittent information to switch stage 8 for a constant time before and after the preset information of divider 13 is varied at the time of varying the preset information divider 13 through the operation of a key and by controlling switch stage 8.
COPYRIGHT: (C)1979,JPO&Japio
JP52141997A 1977-11-25 1977-11-25 Muting device Expired JPS5934018B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52141997A JPS5934018B2 (en) 1977-11-25 1977-11-25 Muting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52141997A JPS5934018B2 (en) 1977-11-25 1977-11-25 Muting device

Publications (2)

Publication Number Publication Date
JPS5474314A true JPS5474314A (en) 1979-06-14
JPS5934018B2 JPS5934018B2 (en) 1984-08-20

Family

ID=15304979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52141997A Expired JPS5934018B2 (en) 1977-11-25 1977-11-25 Muting device

Country Status (1)

Country Link
JP (1) JPS5934018B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53138624A (en) * 1977-05-11 1978-12-04 Hitachi Ltd Muting circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53138624A (en) * 1977-05-11 1978-12-04 Hitachi Ltd Muting circuit

Also Published As

Publication number Publication date
JPS5934018B2 (en) 1984-08-20

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