JPS5489513A - Fm receiver - Google Patents
Fm receiverInfo
- Publication number
- JPS5489513A JPS5489513A JP15970577A JP15970577A JPS5489513A JP S5489513 A JPS5489513 A JP S5489513A JP 15970577 A JP15970577 A JP 15970577A JP 15970577 A JP15970577 A JP 15970577A JP S5489513 A JPS5489513 A JP S5489513A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- shape
- muting
- level
- varied
- 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
Links
Landscapes
- Noise Elimination (AREA)
Abstract
PURPOSE: To simplify IC-implementation by obtaining a muting signal and also making it possible to vary its band width, by obtaining a fixed level-variation signal by the use of a S-shaped demodulated signal.
CONSTITUTION: Signals Sa to Sc, obtained from IF stage 1, are rectified 81 to 83 to obtain addition signal Iw. From a signal from demodulator circuit 40, a signal whose level varies with an IF in a S-shape (N-shape) is obtained by filter 5 and through full-wave rectification 61, signal I56 is obtained whose level varies with an IF in a M-shape (V-shape). Then, subtraction signal I73 between signals I56 and Iw is obtained and its band width is limited by a signal obtained by shaping 72 this I73 at a fixed threshold level; and muting switch 2 is controlled by this limited signal and the level of I73 is varied, so that a band where muting is released can be varied.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15970577A JPS5489513A (en) | 1977-12-27 | 1977-12-27 | Fm receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15970577A JPS5489513A (en) | 1977-12-27 | 1977-12-27 | Fm receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5489513A true JPS5489513A (en) | 1979-07-16 |
Family
ID=15699496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15970577A Pending JPS5489513A (en) | 1977-12-27 | 1977-12-27 | Fm receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5489513A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0655033U (en) * | 1992-10-28 | 1994-07-26 | 株式会社サン・フロンティア・テクノロジー | Cylinder heating device |
-
1977
- 1977-12-27 JP JP15970577A patent/JPS5489513A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0655033U (en) * | 1992-10-28 | 1994-07-26 | 株式会社サン・フロンティア・テクノロジー | Cylinder heating device |
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