JPS6397928U - - Google Patents
Info
- Publication number
- JPS6397928U JPS6397928U JP19177286U JP19177286U JPS6397928U JP S6397928 U JPS6397928 U JP S6397928U JP 19177286 U JP19177286 U JP 19177286U JP 19177286 U JP19177286 U JP 19177286U JP S6397928 U JPS6397928 U JP S6397928U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency
- tone
- tone signal
- converts
- 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
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000005236 sound signal Effects 0.000 claims 1
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
Landscapes
- Noise Elimination (AREA)
Description
第１図は本考案の実施例のＦＭ受信機の復調回
路とトーンスケルチ回路のブロツク図、第２図は
従来の同上ブロツク図である。
２：中間周波増幅回路、３：復調回路、４：低
周波増幅回路、５：スイツチ回路、６：ＨＰＦ、
７：低周波電力増幅回路、８：ＢＰＦ、９：整流
回路、１０：ＬＰＦ、１１：ミクサ回路、１２：
分周回路、１３：発振回路。
FIG. 1 is a block diagram of a demodulation circuit and tone squelch circuit of an FM receiver according to an embodiment of the present invention, and FIG. 2 is a conventional block diagram of the same. 2: intermediate frequency amplification circuit, 3: demodulation circuit, 4: low frequency amplification circuit, 5: switch circuit, 6: HPF,
7: Low frequency power amplifier circuit, 8: BPF, 9: Rectifier circuit, 10: LPF, 11: Mixer circuit, 12:
Frequency dividing circuit, 13: Oscillation circuit.
Claims (1)
調出力よりトーン信号のみ通過させるＬＰＦと、
トーン信号を周波数変換するミクサ回路と、ミク
サ回路のローカル周波数を決定する発振回路、分
周回路と、周波数変換トーン信号選択ＢＰＦと、
このトーン信号を直流電圧に変換する整流回路と
を主要構成要素とし、使用するトーン信号周波数
を前記ミクサ回路である一定周波数に変換し、こ
の信号を前記ＢＰＦで選択して音声信号のスイツ
チ回路を制御することを特徴としたトーンスケル
チ回路。 In the tone squelch circuit of the FM receiver, an LPF that passes only the tone signal from the demodulated output;
A mixer circuit that converts the frequency of a tone signal, an oscillation circuit that determines the local frequency of the mixer circuit, a frequency dividing circuit, a frequency conversion tone signal selection BPF,
The main component is a rectifier circuit that converts this tone signal into a DC voltage, converts the tone signal frequency to be used into a constant frequency that is the mixer circuit, and selects this signal with the BPF to operate the audio signal switch circuit. Tone squelch circuit featuring control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19177286U JPS6397928U (en) | 1986-12-15 | 1986-12-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19177286U JPS6397928U (en) | 1986-12-15 | 1986-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6397928U true JPS6397928U (en) | 1988-06-24 |
Family
ID=31146226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19177286U Pending JPS6397928U (en) | 1986-12-15 | 1986-12-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6397928U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009267544A (en) * | 2008-04-22 | 2009-11-12 | Icom Inc | Tone signal detector, tone signal detection method, and program |
| JP2012019498A (en) * | 2010-06-09 | 2012-01-26 | Hitachi Kokusai Electric Inc | Radio device |
-
1986
- 1986-12-15 JP JP19177286U patent/JPS6397928U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009267544A (en) * | 2008-04-22 | 2009-11-12 | Icom Inc | Tone signal detector, tone signal detection method, and program |
| JP2012019498A (en) * | 2010-06-09 | 2012-01-26 | Hitachi Kokusai Electric Inc | Radio device |
| WO2012053277A1 (en) * | 2010-10-19 | 2012-04-26 | 株式会社日立国際電気 | Wireless device |