JPS5914420U - Tuning circuit - Google Patents
Tuning circuitInfo
- Publication number
- JPS5914420U JPS5914420U JP10955382U JP10955382U JPS5914420U JP S5914420 U JPS5914420 U JP S5914420U JP 10955382 U JP10955382 U JP 10955382U JP 10955382 U JP10955382 U JP 10955382U JP S5914420 U JPS5914420 U JP S5914420U
- Authority
- JP
- Japan
- Prior art keywords
- terminal group
- output
- output terminals
- switching transistor
- commonly connected
- 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.)
- Granted
Links
Landscapes
- Electronic Switches (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Selective Calling Equipment (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図は本考案を案出する途上において考えた選局回路
の問題点を説明するための図面である。
第２図は本考案を実施した選局回路の回路図である。
１・・・マイコン、０１〜Ｏ２・・・第１端子群の出力
端子、０５〜０７・・・第２端子群の出力端子、ＴＲ□
〜ＴＲ□２・・・スイッチングトランジスタ、Ａ□〜Ａ
１□・・・ＬＥＤ（発光ダイオード）。FIG. 1 is a drawing for explaining the problems of the channel selection circuit that were considered during the process of devising the present invention. FIG. 2 is a circuit diagram of a tuning circuit implementing the present invention. 1... Microcomputer, 01-O2... Output terminal of first terminal group, 05-07... Output terminal of second terminal group, TR□
~TR□2...Switching transistor, A□~A
1□...LED (light emitting diode).
Claims (1)
を含む第２端子群を有するマイコンと、前記第１端子群
の出力端子に第１電極がｎ個ずつ共通に接続されたｍｘ
ｎ個のスイッチングトランジスタと、前記スイッチング
トランジスタの第３電極に接続され該スイッチングトラ
ンジスタが導通したときチューニング電圧を出力するよ
うに作動するチューニング電圧供給回路とを有し、前記
スイッチングトランジスタの第２電極は前記第２端子群
のｎ個の出力端子にｍ個ずつ共通に接続されていて、前
記第１、第２電極間に前記マイコンかう類バイパスが与
えられたスイッチングトランジスタのみが導通するよう
にし、一方前記第１端子群の出力端子側にアノードがｎ
個ずつ共通に接続されカソードが前記第２端子群の出力
端子側にｍ個ずつ共通に接続される如くマトリックス接
続されたｍｘｎ個のチャンネル表示用発光ダイオードを
設けてなる選局回路。a microcomputer having a first terminal group including m output terminals and a second terminal group including i output terminals, and an mx in which n first electrodes are commonly connected to the output terminals of the first terminal group.
n switching transistors, and a tuning voltage supply circuit connected to a third electrode of the switching transistor and operating to output a tuning voltage when the switching transistor is conductive, the second electrode of the switching transistor being Only m switching transistors which are commonly connected to each of the n output terminals of the second terminal group and to which the microcomputer type bypass is applied between the first and second electrodes are made conductive; An anode is provided on the output terminal side of the first terminal group.
A channel selection circuit comprising mxn channel display light emitting diodes connected in a matrix such that the cathodes thereof are commonly connected to the output terminal side of the second terminal group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10955382U JPS5914420U (en) | 1982-07-19 | 1982-07-19 | Tuning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10955382U JPS5914420U (en) | 1982-07-19 | 1982-07-19 | Tuning circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5914420U true JPS5914420U (en) | 1984-01-28 |
| JPS643236Y2 JPS643236Y2 (en) | 1989-01-27 |
Family
ID=30255148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10955382U Granted JPS5914420U (en) | 1982-07-19 | 1982-07-19 | Tuning circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5914420U (en) |
-
1982
- 1982-07-19 JP JP10955382U patent/JPS5914420U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS643236Y2 (en) | 1989-01-27 |
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