JPS5959053U

JPS5959053U - portable receiver

Info

Publication number: JPS5959053U
Application number: JP1982154355U
Authority: JP
Inventors: 田中　忠孝
Original assignee: 神田通信工業株式会社
Priority date: 1982-10-12
Filing date: 1982-10-12
Publication date: 1984-04-17

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

[Brief explanation of the drawing]

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

[Scope of utility model registration request]

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.