JPS57109429A - Fm radio receiver - Google Patents
Fm radio receiverInfo
- Publication number
- JPS57109429A JPS57109429A JP18400880A JP18400880A JPS57109429A JP S57109429 A JPS57109429 A JP S57109429A JP 18400880 A JP18400880 A JP 18400880A JP 18400880 A JP18400880 A JP 18400880A JP S57109429 A JPS57109429 A JP S57109429A
- Authority
- JP
- Japan
- Prior art keywords
- tuning
- antenna
- meter
- detector
- supplied
- 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
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
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 eliminate uncomfortable sounds at a detuning time to prevent the erroneous display, by controlling turn-on and off of a multipath distortion reducing deavice by a signal, which is obtained by detecting tuning of a receiving frequency by a tuning point detecting device, in the FM radio receiver. CONSTITUTION:A signal inputted from an antenna 1 is amplified by a front end 2 and is subjected to frequency conversion and is branchea into two through a filter 3, and one is supplied to a detector 5 through a limiter 4, and the other is supplied to an AGC circuit 7 and an AM detector 8 and is outputted to a meter 7 through a switch 106. Outputs of the filter 3 and the detector 5 are detected by level detectors 16 and 17 to obatain a tuning point detection signal from an AND circuit 18, and switches 103 and 106 are turned on by this tuning output to apply the signal to the meter 7; and the power of a power source 105 is supplied through a switch 104 to a motor 102 which changes the direction of the antenna 101, and the antenna 101 is rotated and is set to the direction of less DU ratio. At the detuning time when the tuning point is not detected, inputs of the motor 102 and the meter 107 are cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18400880A JPS57109429A (en) | 1980-12-26 | 1980-12-26 | Fm radio receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18400880A JPS57109429A (en) | 1980-12-26 | 1980-12-26 | Fm radio receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57109429A true JPS57109429A (en) | 1982-07-07 |
Family
ID=16145705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18400880A Pending JPS57109429A (en) | 1980-12-26 | 1980-12-26 | Fm radio receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57109429A (en) |
-
1980
- 1980-12-26 JP JP18400880A patent/JPS57109429A/en active Pending
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