JPS5753160A - Radio receiving device - Google Patents
Radio receiving deviceInfo
- Publication number
- JPS5753160A JPS5753160A JP12798280A JP12798280A JPS5753160A JP S5753160 A JPS5753160 A JP S5753160A JP 12798280 A JP12798280 A JP 12798280A JP 12798280 A JP12798280 A JP 12798280A JP S5753160 A JPS5753160 A JP S5753160A
- Authority
- JP
- Japan
- Prior art keywords
- muting
- circuit
- level
- detuning
- preamplifier
- 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
- 238000001514 detection method Methods 0.000 abstract 2
- 230000007704 transition Effects 0.000 abstract 2
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
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
- H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
- Stereo-Broadcasting Methods (AREA)
Abstract
PURPOSE:To erase pop noise surely, by discriminating a tuning or detuning detection signal by two different levels and by starting the operation of a muting circuit of the preceding stage earlier than that of a muting circuit of the succeeding stage and by releasing the operation of the muting circuit of the preceding stage later than that of the muting circuit of the succeeding stage. CONSTITUTION:For a detuning detection signal VM which becmes high-level for detuning and becomes low-level for tuning, a discrimination level VL1 of the first muting control circuit 11 is higher than a discrimination level VL2 of the second muting control circuit 12. When the muting operation is released due to the transition from detuning to tuning, the signal VM reaches the level VL1 first, and the muting operation in a preamplifier 7 is released before the muting circuit is released, and therefore, pop noise VPOP generated in the output of the preamplifier 7 is erased by a muting circuit 10. When the muting operation is started due to the transition from tuning to detuning, the signal VM reaches the level VL2 first, and the muting operation of the preamplifier 7 is started after the operation of the muting circuit starts, and therefore, pop noise VPOP generated in the output of the preamplifier 7 is earsed by the muting circuit.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12798280A JPS5753160A (en) | 1980-09-17 | 1980-09-17 | Radio receiving device |
DE19813130341 DE3130341A1 (en) | 1980-09-17 | 1981-07-31 | NOISE CONTROL AND WITH THIS PROVIDED FM RADIO RECEIVER |
US06/290,564 US4398060A (en) | 1980-09-17 | 1981-08-06 | Muting circuit for an FM radio receiver |
GB8126544A GB2084825B (en) | 1980-09-17 | 1981-09-02 | A muting circuit and an fm radio receiver incorporating the muting circuit |
GB08229214A GB2111334B (en) | 1980-09-17 | 1982-10-13 | Am fm radio receiver incorporating a muting circuit |
HK462/86A HK46286A (en) | 1980-09-17 | 1986-06-19 | An fm radio receiver incorporating a muting circuit |
HK445/86A HK44586A (en) | 1980-09-17 | 1986-06-19 | A muting circuit |
MY585/86A MY8600585A (en) | 1980-09-17 | 1986-12-30 | An fm radio receiver incorporating a muting circuit |
MY582/86A MY8600582A (en) | 1980-09-17 | 1986-12-30 | A muting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12798280A JPS5753160A (en) | 1980-09-17 | 1980-09-17 | Radio receiving device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5753160A true JPS5753160A (en) | 1982-03-30 |
Family
ID=14973506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12798280A Pending JPS5753160A (en) | 1980-09-17 | 1980-09-17 | Radio receiving device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5753160A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6133280A (en) * | 1984-07-23 | 1986-02-17 | 株式会社田熊総合研究所 | Steam washer |
JPS63263364A (en) * | 1987-04-21 | 1988-10-31 | 株式会社前川製作所 | Continuous drying dehumidifier |
-
1980
- 1980-09-17 JP JP12798280A patent/JPS5753160A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6133280A (en) * | 1984-07-23 | 1986-02-17 | 株式会社田熊総合研究所 | Steam washer |
JPH0330434B2 (en) * | 1984-07-23 | 1991-04-30 | ||
JPS63263364A (en) * | 1987-04-21 | 1988-10-31 | 株式会社前川製作所 | Continuous drying dehumidifier |
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