JPH0244432U - - Google Patents
Info
- Publication number
- JPH0244432U JPH0244432U JP12378288U JP12378288U JPH0244432U JP H0244432 U JPH0244432 U JP H0244432U JP 12378288 U JP12378288 U JP 12378288U JP 12378288 U JP12378288 U JP 12378288U JP H0244432 U JPH0244432 U JP H0244432U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- output
- detector
- squelch circuit
- 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 3
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Noise Elimination (AREA)
Description
第１図は本考案の一実施例を示す構成図である
。
１……ＦＭ検波器、２……信号検出器、４……
遅延回路、５……スイツチ回路、６……音声出力
信号。
FIG. 1 is a block diagram showing an embodiment of the present invention. 1...FM detector, 2...signal detector, 4...
Delay circuit, 5... switch circuit, 6... audio output signal.
Claims (1)
数増幅器出力もしくはＦＭ検波器出力に少なくと
もスケルチ回路の動作立上り時間を越える遅延時
間を付与する遅延回路と、ＦＭ信号入力の有無を
検出する信号検出器と、前記信号検出器と検出結
果にもとづいてＦＭ信号が有するときには前記Ｆ
Ｍ検波出力を通しＦＭ信号入力が無いときには前
記ＦＭ検波出力を断とするスイツチ回路とを備え
て成ることを特徴とするスケルチ回路。 In the squelch circuit of an FM receiver, a delay circuit provides an intermediate frequency amplifier output or an FM detector output with a delay time that exceeds at least the operation rise time of the squelch circuit, and a signal detector that detects the presence or absence of an FM signal input; Based on the signal detector and the detection result, if the FM signal has
1. A squelch circuit comprising: a switch circuit that passes the M detection output and turns off the FM detection output when there is no FM signal input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12378288U JPH0244432U (en) | 1988-09-20 | 1988-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12378288U JPH0244432U (en) | 1988-09-20 | 1988-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0244432U true JPH0244432U (en) | 1990-03-27 |
Family
ID=31372950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12378288U Pending JPH0244432U (en) | 1988-09-20 | 1988-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244432U (en) |
-
1988
- 1988-09-20 JP JP12378288U patent/JPH0244432U/ja active Pending