JPH02113448U - - Google Patents
Info
- Publication number
- JPH02113448U JPH02113448U JP2133589U JP2133589U JPH02113448U JP H02113448 U JPH02113448 U JP H02113448U JP 2133589 U JP2133589 U JP 2133589U JP 2133589 U JP2133589 U JP 2133589U JP H02113448 U JPH02113448 U JP H02113448U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switch means
- power supply
- audio amplification
- output
- 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
- 230000003321 amplification Effects 0.000 claims description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Noise Elimination (AREA)
Description
第１図はこの考案に係る無線受信機の実施例を
示すブロツク図、第２図は従来の実施例を示すブ
ロツク図である。
主な符号の説明、１……アンテナ、２……高周
波増幅部、３……音声増幅回路、４……スピーカ
、５……出力データ、６……電源部、７，９，１
０……スイツチ、８……スケルチ検出回路。
FIG. 1 is a block diagram showing an embodiment of a radio receiver according to this invention, and FIG. 2 is a block diagram showing a conventional embodiment. Explanation of main symbols, 1...Antenna, 2...High frequency amplification section, 3...Audio amplification circuit, 4...Speaker, 5...Output data, 6...Power supply section, 7, 9, 1
0...Switch, 8...Squelch detection circuit.
Claims (1)
高周波増幅部の出力に基づき動作するスケルチ検
出回路と、高周波増幅部の検波出力をスピーカに
導く音声増幅回路と、この音声増幅回路の電源回
路と、この電源回路の出力をオン・オフする第１
のスイツチ手段とからなり、アンテナ入力が予め
定められたレベル以下のときには前記スケルチ検
出回路は音声増幅回路への電源の供給を遮断する
ように構成した無線受信機において、 前記音声増幅回路の入力線路に第２のスイツチ
手段を設けると共に前記スケルチ検出回路が第１
のスイツチ手段もしくは第２のスイツチ手段を選
択して制御可能にした選択手段を設けたことを特
徴とする無線受信機。[Claims for Utility Model Registration] A high-frequency amplification section that amplifies antenna input, a squelch detection circuit that operates based on the output of this high-frequency amplification section, an audio amplification circuit that guides the detected output of the high-frequency amplification section to a speaker, and A power supply circuit for the amplifier circuit and a first circuit that turns on and off the output of this power supply circuit.
a switch means of the audio amplification circuit, and the squelch detection circuit is configured to cut off power supply to the audio amplification circuit when the antenna input is below a predetermined level, the input line of the audio amplification circuit is provided with a second switch means, and the squelch detection circuit is connected to the first switch means.
1. A radio receiver comprising a selection means that can select and control either the first switch means or the second switch means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2133589U JPH02113448U (en) | 1989-02-28 | 1989-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2133589U JPH02113448U (en) | 1989-02-28 | 1989-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02113448U true JPH02113448U (en) | 1990-09-11 |
Family
ID=31238485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2133589U Pending JPH02113448U (en) | 1989-02-28 | 1989-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02113448U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5380905A (en) * | 1976-12-25 | 1978-07-17 | Toshiba Corp | Squelch device |
| JPS59119928A (en) * | 1982-12-27 | 1984-07-11 | Toshiba Corp | Communication system of radio device |
-
1989
- 1989-02-28 JP JP2133589U patent/JPH02113448U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5380905A (en) * | 1976-12-25 | 1978-07-17 | Toshiba Corp | Squelch device |
| JPS59119928A (en) * | 1982-12-27 | 1984-07-11 | Toshiba Corp | Communication system of radio device |
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