JPS6221615U - - Google Patents
Info
- Publication number
- JPS6221615U JPS6221615U JP11385185U JP11385185U JPS6221615U JP S6221615 U JPS6221615 U JP S6221615U JP 11385185 U JP11385185 U JP 11385185U JP 11385185 U JP11385185 U JP 11385185U JP S6221615 U JPS6221615 U JP S6221615U
- Authority
- JP
- Japan
- Prior art keywords
- modulated wave
- circuit
- mixer circuit
- frequency
- demodulates
- 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 description 4
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Superheterodyne Receivers (AREA)
Description
第１図は本考案の一実施例のＦＭ復調器のブロ
ツク図、第２図は従来のＦＭ復調器の一例のブロ
ツク図である。
１，３……ミキサ回路、２，４……検波回路、
５……減算回路、６，７……発振回路、８……被
変調波入力端子、９……復調出力端子、１０……
コンデンサ。
FIG. 1 is a block diagram of an FM demodulator according to an embodiment of the present invention, and FIG. 2 is a block diagram of an example of a conventional FM demodulator. 1, 3... mixer circuit, 2, 4... detection circuit,
5... Subtraction circuit, 6, 7... Oscillation circuit, 8... Modulated wave input terminal, 9... Demodulation output terminal, 10...
capacitor.
Claims (1)
１のローカル周波数により周波数変換する第１の
ミキサ回路と、この第１のミキサ回路の出力をＦ
Ｍ復調する第１の検出回路と、前記被変調波をこ
の被変調波のキヤリアより高い第２のローカル周
波数により周波数変換する第２のミキサ回路と、
この第２のミキサ回路の出力をＦＭ復調する第２
の検波回路と、前記第１および第２の各検波回路
の出力の差を取り出す減算回路とを含むＦＭ復調
器。 A first mixer circuit that frequency-converts the modulated wave by a first local frequency lower than the carrier of the modulated wave, and an F
a first detection circuit that demodulates the modulated wave; a second mixer circuit that converts the frequency of the modulated wave using a second local frequency higher than the carrier of the modulated wave;
A second mixer circuit that FM demodulates the output of this second mixer circuit.
An FM demodulator comprising: a detection circuit; and a subtraction circuit that extracts a difference between the outputs of the first and second detection circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11385185U JPS6221615U (en) | 1985-07-24 | 1985-07-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11385185U JPS6221615U (en) | 1985-07-24 | 1985-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6221615U true JPS6221615U (en) | 1987-02-09 |
Family
ID=30996043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11385185U Pending JPS6221615U (en) | 1985-07-24 | 1985-07-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6221615U (en) |
-
1985
- 1985-07-24 JP JP11385185U patent/JPS6221615U/ja active Pending
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