JPH01133831U - - Google Patents
Info
- Publication number
- JPH01133831U JPH01133831U JP3022988U JP3022988U JPH01133831U JP H01133831 U JPH01133831 U JP H01133831U JP 3022988 U JP3022988 U JP 3022988U JP 3022988 U JP3022988 U JP 3022988U JP H01133831 U JPH01133831 U JP H01133831U
- Authority
- JP
- Japan
- Prior art keywords
- radio receiver
- variable capacitance
- capacitance diode
- noise component
- circuit
- 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 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Noise Elimination (AREA)
Description
第１図は本考案によるラジオ受信機の雑音低減
回路の一実施例を示すブロツク図、第２図は従来
例を示すブロツク図である。
３……ミキサ、５……ＦＭ検波器、７……ロー
カル発振器、１１……ローパスフイルタ、１２…
…ノイズアンプ、１３……レベル調整器、１４…
…減算器。
FIG. 1 is a block diagram showing one embodiment of a noise reduction circuit for a radio receiver according to the present invention, and FIG. 2 is a block diagram showing a conventional example. 3...Mixer, 5...FM detector, 7...Local oscillator, 11...Low pass filter, 12...
...Noise amplifier, 13...Level adjuster, 14...
...Subtractor.
Claims (1)
発振回路を設けたＦＭラジオ受信機において、上
記可変容量ダイオードから発生するノイズ成分を
取り出して、ＦＭ検波出力信号中のノイズ成分を
打ち消す機にしたことを特徴とするＦＭラジオ受
信機の雑音低減回路。 An FM radio receiver equipped with a local oscillation circuit having a variable capacitance diode in the resonant circuit, characterized in that the noise component generated from the variable capacitance diode is extracted and the noise component in the FM detection output signal is canceled out. Noise reduction circuit for FM radio receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3022988U JPH01133831U (en) | 1988-03-07 | 1988-03-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3022988U JPH01133831U (en) | 1988-03-07 | 1988-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01133831U true JPH01133831U (en) | 1989-09-12 |
Family
ID=31255111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3022988U Pending JPH01133831U (en) | 1988-03-07 | 1988-03-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01133831U (en) |
-
1988
- 1988-03-07 JP JP3022988U patent/JPH01133831U/ja active Pending
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