JPH0221825U - - Google Patents
Info
- Publication number
- JPH0221825U JPH0221825U JP9277788U JP9277788U JPH0221825U JP H0221825 U JPH0221825 U JP H0221825U JP 9277788 U JP9277788 U JP 9277788U JP 9277788 U JP9277788 U JP 9277788U JP H0221825 U JPH0221825 U JP H0221825U
- Authority
- JP
- Japan
- Prior art keywords
- timer
- power
- power supply
- circuit
- drive signal
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
Landscapes
- Electronic Switches (AREA)
Description
図示した回路は、本考案の電源供給制御回路を
ラジオ受信装置に組込んだ場合の一実施例である
。
主な図番の説明、1…電池、2…電源スイツチ
、3…選択スイツチ、4…タイマー回路、7…ラ
ジオ受信回路、9…電源供給用トランジスター、
11…タイマー制御用トランジスター、14…リ
セツト用トランジスター、16…起動用コンデン
サー。
The illustrated circuit is an embodiment in which the power supply control circuit of the present invention is incorporated into a radio receiving device. Explanation of main drawing numbers, 1... Battery, 2... Power switch, 3... Selection switch, 4... Timer circuit, 7... Radio receiving circuit, 9... Power supply transistor,
11...Timer control transistor, 14...Reset transistor, 16...Start-up capacitor.
Claims (1)
共に所定時間駆動信号を出力する出力端子を有す
るタイマー回路と、連続使用とタイマー使用とを
切換える選択スイツチと、前記タイマー回路より
駆動信号が出力されているとき又は前記選択スイ
ツチが連続使用側にあるとき導通状態になると共
に負荷へ電源を供給する電源供給用トランジスタ
ーと、前記選択スイツチがタイマー使用側にある
とき電源が供給されると導通状態になると共に前
記タイマー回路に電源を供給するタイマー制御用
トランジスターと、前記タイマー回路の出力端子
と接地間に接続されていると共に電源スイツチの
閉成時前記電源供給用トランジスター及び前記タ
イマー制御用トランジスターにバイアス電流を流
す起動用コンデンサーとより成り、タイマー使用
動作時前記タイマー回路の駆動信号によつて前記
タイマー制御用トランジスターを導通状態に保持
するようにしたことを特徴とする電源供給制御回
路。 A timer circuit having an output terminal that starts timer operation when power is supplied and outputs a drive signal for a predetermined period of time, a selection switch that switches between continuous use and timer use, and a drive signal output from the timer circuit. or when the selection switch is on the continuous use side, a power supply transistor becomes conductive and supplies power to the load; and when the selection switch is on the timer use side, the power supply transistor becomes conductive when power is supplied. A timer control transistor for supplying power to the timer circuit; and a timer control transistor connected between an output terminal of the timer circuit and ground, and supplying a bias current to the power supply transistor and the timer control transistor when a power switch is closed. What is claimed is: 1. A power supply control circuit comprising a starting capacitor that conducts current, and is configured to maintain the timer control transistor in a conductive state by a drive signal of the timer circuit when the timer is in use.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9277788U JPH0221825U (en) | 1988-07-13 | 1988-07-13 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9277788U JPH0221825U (en) | 1988-07-13 | 1988-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0221825U true JPH0221825U (en) | 1990-02-14 |
Family
ID=31317217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9277788U Pending JPH0221825U (en) | 1988-07-13 | 1988-07-13 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0221825U (en) |
-
1988
- 1988-07-13 JP JP9277788U patent/JPH0221825U/ja active Pending