JPS6193044U - - Google Patents
Info
- Publication number
- JPS6193044U JPS6193044U JP17738984U JP17738984U JPS6193044U JP S6193044 U JPS6193044 U JP S6193044U JP 17738984 U JP17738984 U JP 17738984U JP 17738984 U JP17738984 U JP 17738984U JP S6193044 U JPS6193044 U JP S6193044U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- signal
- frequency signal
- supplied
- crystal resonator
- 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.)
- Granted
Links
- 239000013078 crystal Substances 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Circuits Of Receivers In General (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図はこの考案の一例の接続図、第２図〜第
４図はその説明のための図である。
２２はＦＭ復調回路である。
FIG. 1 is a connection diagram of an example of this invention, and FIGS. 2 to 4 are diagrams for explaining the same. 22 is an FM demodulation circuit.
Claims (1)
、この第１中間周波信号がさらに第２中間周波信
号に周波数変換され、この第２中間周波信号がＦ
Ｍ復調されるダブルスーパー形式のＦＭ受信機に
おいて、上記第２中間周波信号の中間周波数は、
上記第１中間周波信号のための第１中間周波アン
プのスプリアス成分がない周波数とされ、上記第
２中間周波信号が差動アンプの一方の入力端に供
給されると共に、抵抗器と水晶共振子との直列回
路に供給され、上記抵抗器と上記水晶共振子との
接続中点に得られる信号が上記差動アンプの他方
の入力端に供給され、上記差動アンプの出力と上
記第２中間周波信号とが乗算回路に供給されると
共に、上記水晶共振子の直列共振周波数が上記第
２中間周波数よりも低く、かつ、上記水晶共振子
の並列共振周波数が上記第２中間周波数よりも高
く選定されて上記乗算回路から上記第２中間周波
信号のＦＭ復調出力が取り出されるＦＭ受信機。 The received signal is frequency-converted to a first intermediate frequency signal, this first intermediate frequency signal is further frequency-converted to a second intermediate frequency signal, and this second intermediate frequency signal is
In a double super type FM receiver that performs M demodulation, the intermediate frequency of the second intermediate frequency signal is:
The first intermediate frequency amplifier for the first intermediate frequency signal has a frequency free of spurious components, and the second intermediate frequency signal is supplied to one input terminal of the differential amplifier, and the resistor and the crystal resonator are connected to each other. A signal obtained at the midpoint of the connection between the resistor and the crystal resonator is supplied to the other input terminal of the differential amplifier, and the signal is supplied to the series circuit between the output of the differential amplifier and the second intermediate point. a frequency signal is supplied to a multiplier circuit, and the series resonant frequency of the crystal resonator is selected to be lower than the second intermediate frequency, and the parallel resonant frequency of the crystal resonator is selected to be higher than the second intermediate frequency. and an FM demodulated output of the second intermediate frequency signal is extracted from the multiplication circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17738984U JPH0241961Y2 (en) | 1984-11-22 | 1984-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17738984U JPH0241961Y2 (en) | 1984-11-22 | 1984-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6193044U true JPS6193044U (en) | 1986-06-16 |
| JPH0241961Y2 JPH0241961Y2 (en) | 1990-11-08 |
Family
ID=30734958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17738984U Expired JPH0241961Y2 (en) | 1984-11-22 | 1984-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0241961Y2 (en) |
-
1984
- 1984-11-22 JP JP17738984U patent/JPH0241961Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0241961Y2 (en) | 1990-11-08 |
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