JPS61149419U - - Google Patents
Info
- Publication number
- JPS61149419U JPS61149419U JP3239285U JP3239285U JPS61149419U JP S61149419 U JPS61149419 U JP S61149419U JP 3239285 U JP3239285 U JP 3239285U JP 3239285 U JP3239285 U JP 3239285U JP S61149419 U JPS61149419 U JP S61149419U
- Authority
- JP
- Japan
- Prior art keywords
- output
- amplifier
- filter
- variable gain
- amplitude
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は、この考案の一実施例による復調回路
を示す構成図、第２図は従来の復調回路を示す構
成図、第３図は復調回路の周波数関係を示す図で
ある。
２は利得可変増幅器、３は振幅制限器、４は復
調器、５は増幅器、７は帯域通過フイルタ、８は
検波器、９はループフイルタである。なお図中同
一符号は、同一又は相当部分を示す。
FIG. 1 is a block diagram showing a demodulation circuit according to an embodiment of the present invention, FIG. 2 is a block diagram showing a conventional demodulation circuit, and FIG. 3 is a diagram showing the frequency relationship of the demodulation circuit. 2 is a variable gain amplifier, 3 is an amplitude limiter, 4 is a demodulator, 5 is an amplifier, 7 is a band pass filter, 8 is a detector, and 9 is a loop filter. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
される振幅制限器と、上記振幅制限器の出力端に
接続され周波数変調または位相変調された信号を
復調する復調器と、復調出力を増幅する増幅器と
、上記増幅器の出力を一部をとり出す帯域通過フ
イルタと、上記フイルタの出力の振幅を検出する
検波器と、検波器出力を、上記利得可変増幅器に
帰還させるリープフイルタとを備えたことを特徴
とする復調回路。 A variable gain amplifier, an amplitude limiter connected to the output end of the amplifier, a demodulator connected to the output end of the amplitude limiter to demodulate a frequency-modulated or phase-modulated signal, and an amplifier to amplify the demodulated output. and a bandpass filter for extracting a part of the output of the amplifier, a wave detector for detecting the amplitude of the output of the filter, and a leap filter for feeding back the detector output to the variable gain amplifier. Characteristic demodulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3239285U JPS61149419U (en) | 1985-03-07 | 1985-03-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3239285U JPS61149419U (en) | 1985-03-07 | 1985-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61149419U true JPS61149419U (en) | 1986-09-16 |
Family
ID=30533864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3239285U Pending JPS61149419U (en) | 1985-03-07 | 1985-03-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61149419U (en) |
-
1985
- 1985-03-07 JP JP3239285U patent/JPS61149419U/ja active Pending
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