JPS57174957A - Multi-path interference rejecting circuit - Google Patents
Multi-path interference rejecting circuitInfo
- Publication number
- JPS57174957A JPS57174957A JP6091881A JP6091881A JPS57174957A JP S57174957 A JPS57174957 A JP S57174957A JP 6091881 A JP6091881 A JP 6091881A JP 6091881 A JP6091881 A JP 6091881A JP S57174957 A JPS57174957 A JP S57174957A
- Authority
- JP
- Japan
- Prior art keywords
- pilot signal
- signal
- path interference
- circuit
- interference
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
- H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
- H04H40/72—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for noise suppression
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1646—Circuits adapted for the reception of stereophonic signals
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Noise Elimination (AREA)
- Stereo-Broadcasting Methods (AREA)
Abstract
PURPOSE:To reject pulse noise due to multi-path interference, by detecting the generation of multi-path interference and rejecting a pilot signal during its period. CONSTITUTION:When a reception state is changed, and a reception signal received on an antenna 1 is troubled with multi-path interference, then a pilot signal is subjected to interference, high frequency noise component included in the reception signal is increased and it passes through a band pass filter 12, a signal produced at an output terminal of a level detection circuit 14 is rapidly increased and an output of a differentiation circuit 16. Thus, a control transistor 11 turns on and a series resonance circuit 8 is resonated with a pilot signal frequency. As a result, the pilot signal is attenuated and rejected. Thus, the pilot signal having undesirable amplitude and phase is not applied to a stereo multiplex circuit 7 and the generation of pulsive noise is prevented. Then, a monaural signal is produced at both output terminals 21 and 22.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6091881A JPS57174957A (en) | 1981-04-21 | 1981-04-21 | Multi-path interference rejecting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6091881A JPS57174957A (en) | 1981-04-21 | 1981-04-21 | Multi-path interference rejecting circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57174957A true JPS57174957A (en) | 1982-10-27 |
JPH0347614B2 JPH0347614B2 (en) | 1991-07-19 |
Family
ID=13156235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6091881A Granted JPS57174957A (en) | 1981-04-21 | 1981-04-21 | Multi-path interference rejecting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57174957A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0284101A2 (en) * | 1987-03-27 | 1988-09-28 | Sanyo Electric Co., Ltd. | FM/FMX stereophonic receiver |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54126514U (en) * | 1978-02-23 | 1979-09-04 | ||
JPS5528685A (en) * | 1978-08-23 | 1980-02-29 | Mitsubishi Electric Corp | Fm stereo radio receiver |
JPS55134554A (en) * | 1979-04-06 | 1980-10-20 | Matsushita Electric Ind Co Ltd | Radio receiver |
JPS55153444A (en) * | 1979-05-18 | 1980-11-29 | Hitachi Ltd | Automatic switching unit for stereo-monaural |
-
1981
- 1981-04-21 JP JP6091881A patent/JPS57174957A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54126514U (en) * | 1978-02-23 | 1979-09-04 | ||
JPS5528685A (en) * | 1978-08-23 | 1980-02-29 | Mitsubishi Electric Corp | Fm stereo radio receiver |
JPS55134554A (en) * | 1979-04-06 | 1980-10-20 | Matsushita Electric Ind Co Ltd | Radio receiver |
JPS55153444A (en) * | 1979-05-18 | 1980-11-29 | Hitachi Ltd | Automatic switching unit for stereo-monaural |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0284101A2 (en) * | 1987-03-27 | 1988-09-28 | Sanyo Electric Co., Ltd. | FM/FMX stereophonic receiver |
Also Published As
Publication number | Publication date |
---|---|
JPH0347614B2 (en) | 1991-07-19 |
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