JPS5474314A - Muting unit - Google Patents
Muting unitInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53138624A (en) * | 1977-05-11 | 1978-12-04 | Hitachi Ltd | Muting circuit |
-
1977
- 1977-11-25 JP JP52141997A patent/JPS5934018B2/en not_active Expired
Patent Citations (1)
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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