JPS6331634U - - Google Patents
Info
- Publication number
- JPS6331634U JPS6331634U JP12459386U JP12459386U JPS6331634U JP S6331634 U JPS6331634 U JP S6331634U JP 12459386 U JP12459386 U JP 12459386U JP 12459386 U JP12459386 U JP 12459386U JP S6331634 U JPS6331634 U JP S6331634U
- Authority
- JP
- Japan
- Prior art keywords
- output
- intermediate frequency
- amplifier
- frequency
- vhf converter
- 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 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Noise Elimination (AREA)
- Radio Relay Systems (AREA)
Description
第１図は本考案によるＦＭ放送中継用受信装置
の一実施例を示すブロツク系統図、第２図は従来
のＦＭ放送中継用受信装置の一例を示すブロツク
系統図である。
１……低域雑音増幅器、２……ミキサー回路部
、３……局部発振器、４……中間周波数帯域波
器、５……中間周波数増幅器、６……ＶＨＦ変換
器、７……中間周波数検出回路。
FIG. 1 is a block system diagram showing an embodiment of an FM broadcast relay receiving apparatus according to the present invention, and FIG. 2 is a block system diagram showing an example of a conventional FM broadcast relay receiving apparatus. 1...Low frequency amplifier, 2...Mixer circuit section, 3...Local oscillator, 4...Intermediate frequency band generator, 5...Intermediate frequency amplifier, 6...VHF converter, 7...Intermediate frequency detection circuit.
Claims (1)
の低域雑音増幅器の出力と局部発振器よりの出力
とを混合するミキサー回路部と、このミキサー回
路部の出力を入力とし中間周波数成分を抽出する
中間周波数帯域波器と、この中間周波数帯域
波器の出力を入力とし出力が一定レベルになるよ
うに増幅する自動利得調整機能を有する中間周波
数増幅器と、この中間周波数増幅器の出力信号を
ＦＭ放送用周波数に変換するＶＨＦ変換器とより
構成される受信装置において、前記中間周波数増
幅器の出力の中間周波数の有無を検出し前記受信
入力信号が瞬時に断したとき前記ＶＨＦ変換器の
電源を断する構成の中間周波数検出回路を含むこ
とを特徴とするＦＭ放送中継用受信装置。 A low-frequency noise amplifier that amplifies the received input signal, a mixer circuit that mixes the output of the low-frequency noise amplifier and the output from the local oscillator, and an intermediate that uses the output of the mixer circuit as input to extract intermediate frequency components. A frequency band waver, an intermediate frequency amplifier having an automatic gain adjustment function that takes the output of the intermediate frequency band waver as input and amplifies the output to a constant level, and converts the output signal of the intermediate frequency amplifier into an FM broadcasting frequency. In a receiving device comprising a VHF converter for converting into a VHF converter, the receiver is configured to detect the presence or absence of an intermediate frequency in the output of the intermediate frequency amplifier, and turn off the power to the VHF converter when the received input signal is instantaneously cut off. 1. A receiving device for FM broadcast relay, comprising an intermediate frequency detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12459386U JPS6331634U (en) | 1986-08-15 | 1986-08-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12459386U JPS6331634U (en) | 1986-08-15 | 1986-08-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6331634U true JPS6331634U (en) | 1988-03-01 |
Family
ID=31016752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12459386U Pending JPS6331634U (en) | 1986-08-15 | 1986-08-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6331634U (en) |
-
1986
- 1986-08-15 JP JP12459386U patent/JPS6331634U/ja active Pending
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