JPS5959053U - portable receiver - Google Patents
portable receiverInfo
- Publication number
- JPS5959053U JPS5959053U JP1982154355U JP15435582U JPS5959053U JP S5959053 U JPS5959053 U JP S5959053U JP 1982154355 U JP1982154355 U JP 1982154355U JP 15435582 U JP15435582 U JP 15435582U JP S5959053 U JPS5959053 U JP S5959053U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- portable receiver
- control transistor
- resistor
- switching transistor
- 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
- Circuits Of Receivers In General (AREA)
- Mobile Radio Communication Systems (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図は携帯用受信機の系統図である。第2図2は従来
の電源制御回路の回路図、第3図は本考案の一実施例で
ある電源制御回路の回路図である。
第4図は第2図の出力電圧特性図、第5図は第3図の出
力電圧特性図である。
1・・・電源制御回路、2・・・発振回路、Vcc・・
・電源、TR1・・・スイッチングトランジスタ、TR
2・・・制・御トランジスタ、R□、R2・・・分割抵
抗、R4・・・制御トランジスタTR2の電流制御用抵
抗、SP・・・スピーカ。FIG. 1 is a system diagram of a portable receiver. FIG. 2 is a circuit diagram of a conventional power supply control circuit, and FIG. 3 is a circuit diagram of a power supply control circuit according to an embodiment of the present invention. 4 is an output voltage characteristic diagram of FIG. 2, and FIG. 5 is an output voltage characteristic diagram of FIG. 3. 1...Power supply control circuit, 2...Oscillation circuit, Vcc...
・Power supply, TR1...Switching transistor, TR
2... Control/control transistor, R□, R2... Dividing resistor, R4... Resistor for current control of control transistor TR2, SP... Speaker.
Claims (1)
呼出音により呼出されたことを知らせる携帯用受信機に
おいて、呼出用の発振回路を動作させる電滌の接・断を
するスイッチングトランジスタとスイッチングトランジ
スタを制御する制御トランジスタと、制御トランジスタ
のベースに入力電圧を与える分割抵抗と、前記スイッチ
ングトランジスタの出力端とアース間に前記制御トラン
ジスタの電流ル制御用抵抗を介してコンデンサを接続し
、前記発振回路に供給される電圧がなめらかに立上るよ
うにしたことを特徴とする携帯用受信機。In a portable receiver that notifies the carrier of the call by a ring tone when the individual selection call signal is received, the switching transistor connects and disconnects the electric power that operates the ring oscillation circuit. A control transistor that controls the transistor, a dividing resistor that applies an input voltage to the base of the control transistor, and a capacitor connected between the output terminal of the switching transistor and the ground via a resistor for controlling the current of the control transistor, and the oscillation A portable receiver characterized in that the voltage supplied to the circuit rises smoothly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1982154355U JPS5959053U (en) | 1982-10-12 | 1982-10-12 | portable receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1982154355U JPS5959053U (en) | 1982-10-12 | 1982-10-12 | portable receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5959053U true JPS5959053U (en) | 1984-04-17 |
Family
ID=30341226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1982154355U Pending JPS5959053U (en) | 1982-10-12 | 1982-10-12 | portable receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5959053U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60223328A (en) * | 1984-04-20 | 1985-11-07 | Nec Corp | Analog-digital converter |
-
1982
- 1982-10-12 JP JP1982154355U patent/JPS5959053U/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60223328A (en) * | 1984-04-20 | 1985-11-07 | Nec Corp | Analog-digital converter |
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