JPS5899945U - Day emphasis circuit switching device - Google Patents
Day emphasis circuit switching deviceInfo
- Publication number
- JPS5899945U JPS5899945U JP19162181U JP19162181U JPS5899945U JP S5899945 U JPS5899945 U JP S5899945U JP 19162181 U JP19162181 U JP 19162181U JP 19162181 U JP19162181 U JP 19162181U JP S5899945 U JPS5899945 U JP S5899945U
- Authority
- JP
- Japan
- Prior art keywords
- switching device
- emphasis circuit
- circuit switching
- emphasis
- day emphasis
- 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
Landscapes
- Television Receiver Circuits (AREA)
- Circuits Of Receivers In General (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のプリエンファシス回路の回路図、第２図
は第１図におけるスイッチをオフ状態にしたときの周波
数特性図、第３図、第４図および第５図は本考案の一実
施例のディエンファシス切換回路、受信周波数帯を検出
する検出装置の構成説明図、および検出装置の出力でデ
ィエンファシス −切換回路に切換信号を出力する信号
発生回路を示す。
Ｒ１・・・・・・抵抗、Ｃ１，Ｃ２・・・・・・コンデ
ンサ、Ｑ□・・・・・・ＦＥＴ、Ｓ・・・・・・スイッ
チ、２・・・・・・帯状ダイヤル、３・・・・・・ホト
カプラ。Fig. 1 is a circuit diagram of a conventional pre-emphasis circuit, Fig. 2 is a frequency characteristic diagram when the switch in Fig. 1 is turned off, and Figs. 3, 4, and 5 are an implementation of the present invention. FIG. 2 shows an example de-emphasis switching circuit, a configuration explanatory diagram of a detection device for detecting a reception frequency band, and a signal generation circuit that outputs a switching signal to the de-emphasis-switching circuit using the output of the detection device. R1...Resistor, C1, C2...Capacitor, Q□...FET, S...Switch, 2...Strip dial, 3 ...Hotocoupler.
Claims (1)
放送電波の１つを選択して受信する受信機におけるディ
エンファシス回路切換装置であって、同調操作手段に連
動して選択されている受信′ 帯域を検出する検
出手段と、該検出手段の出力により選択されている受信
帯域に対応してディエンファシス回路の時定数を切換え
る切換手段とを備えてなることを特徴とするディエンフ
ァシス回路切換装置。 ′A de-emphasis circuit switching device in a receiver that selects and receives one of two types of broadcast radio waves with different pre-emphasis characteristics within the same band, and which selects and receives one of two types of broadcast waves with different pre-emphasis characteristics in the same band. 1. A de-emphasis circuit switching device comprising: a detection means for detecting; and a switching means for switching a time constant of a de-emphasis circuit in accordance with a reception band selected by the output of the detection means. ′
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19162181U JPS5899945U (en) | 1981-12-24 | 1981-12-24 | Day emphasis circuit switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19162181U JPS5899945U (en) | 1981-12-24 | 1981-12-24 | Day emphasis circuit switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5899945U true JPS5899945U (en) | 1983-07-07 |
Family
ID=30105071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19162181U Pending JPS5899945U (en) | 1981-12-24 | 1981-12-24 | Day emphasis circuit switching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5899945U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6090944U (en) * | 1983-11-29 | 1985-06-21 | パイオニア株式会社 | FM-TV automatic switching circuit |
-
1981
- 1981-12-24 JP JP19162181U patent/JPS5899945U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6090944U (en) * | 1983-11-29 | 1985-06-21 | パイオニア株式会社 | FM-TV automatic switching circuit |
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