JPS5470714A - Fm receiver - Google Patents
Fm receiverInfo
- Publication number
- JPS5470714A JPS5470714A JP13747077A JP13747077A JPS5470714A JP S5470714 A JPS5470714 A JP S5470714A JP 13747077 A JP13747077 A JP 13747077A JP 13747077 A JP13747077 A JP 13747077A JP S5470714 A JPS5470714 A JP S5470714A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- emphasis
- transistor
- turned
- field region
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
- H03G5/18—Automatic control in untuned amplifiers
Landscapes
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
PURPOSE:To decrease the noise component at the weak field region and to increase the articulation by increasing the de-emphasis constant in accordance with reduction of the detection level of the received wave. CONSTITUTION:At the reception time at the weak field region, the detection voltage of peak detection circuit 18 is lowered. And transistor 15 is turned off, and the collector features a high potential with transistor 13 and 14 turned on. Then the one end of capacitor 11 and 12 of de-emphasis adjusting circuit 6 is earthed to actuate circuit 6. Accordingly, the high band is attenuated according to the de-emphasis constant of circuit 6 for the aural signal of the output of detector circuit 4, and then the aural signal is supplied to the stereo demodulation part via capacitor 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13747077A JPS5470714A (en) | 1977-11-16 | 1977-11-16 | Fm receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13747077A JPS5470714A (en) | 1977-11-16 | 1977-11-16 | Fm receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5470714A true JPS5470714A (en) | 1979-06-06 |
Family
ID=15199348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13747077A Pending JPS5470714A (en) | 1977-11-16 | 1977-11-16 | Fm receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5470714A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0221729A (en) * | 1988-07-11 | 1990-01-24 | Fujitsu Ten Ltd | Receiver |
-
1977
- 1977-11-16 JP JP13747077A patent/JPS5470714A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0221729A (en) * | 1988-07-11 | 1990-01-24 | Fujitsu Ten Ltd | Receiver |
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