JPS58182507U - Dual frequency signal generation circuit for cordless telephones - Google Patents

Dual frequency signal generation circuit for cordless telephones

Info

Publication number
JPS58182507U
JPS58182507U JP1982078546U JP7854682U JPS58182507U JP S58182507 U JPS58182507 U JP S58182507U JP 1982078546 U JP1982078546 U JP 1982078546U JP 7854682 U JP7854682 U JP 7854682U JP S58182507 U JPS58182507 U JP S58182507U
Authority
JP
Japan
Prior art keywords
frequency signal
signal generation
time constant
generation circuit
dual frequency
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
Application number
JP1982078546U
Other languages
Japanese (ja)
Other versions
JPH024495Y2 (en
Inventor
佐野　富茂
Original Assignee
三洋電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to JP1982078546U priority Critical patent/JPS58182507U/en
Publication of JPS58182507U publication Critical patent/JPS58182507U/en
Application granted granted Critical
Publication of JPH024495Y2 publication Critical patent/JPH024495Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Devices For Supply Of Signal Current (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

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の２周波数信号発生回路を示す。 主な図番の説明、１・・・・・・電池、２・・・・・・
モード切換スイッチ、３・５ｅｅｄｓコールボタンスイ
ツチ、４゜５、　６．　７・・・・・・スイッチングト
ランジスタ、８″・・・・・・発振トランジスタ、９・
・・・・・時定数回路。The drawing shows a two-frequency signal generation circuit of the present invention. Explanation of main drawing numbers, 1...Battery, 2...
Mode changeover switch, 3/5eeds call button switch, 4°5, 6. 7...Switching transistor, 8''...Oscillation transistor, 9.
...Time constant circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 直流電源と発振用トランジスタとの間に接続された切換
スイッチ及び第１と第２のスイッチングトランジスタ、
前記発振用トランジスタに接続された時定数決定用のコ
ンデンサ及び抵抗より成る時定数回路、該時定数回路の
構成素子を短絡する−　第３のスイッチングトランジス
タを備え、前記切換スイッチの切換えにより前記第３の
スイッチングトランジスタのオン、オフを制御して前記
時定数回路の時定数を変化させて２周波数の信号を発生
することを特徴とした２周波数信号発生回路。a changeover switch and first and second switching transistors connected between the DC power supply and the oscillation transistor;
A time constant circuit including a capacitor and a resistor for determining a time constant connected to the oscillation transistor, and a third switching transistor for short-circuiting the components of the time constant circuit; 1. A two-frequency signal generation circuit, characterized in that the switching transistor is turned on and off to change the time constant of the time constant circuit, thereby generating a two-frequency signal.
JP1982078546U 1982-05-27 1982-05-27 Dual frequency signal generation circuit for cordless telephones Granted JPS58182507U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1982078546U JPS58182507U (en) 1982-05-27 1982-05-27 Dual frequency signal generation circuit for cordless telephones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1982078546U JPS58182507U (en) 1982-05-27 1982-05-27 Dual frequency signal generation circuit for cordless telephones

Publications (2)

Publication Number Publication Date
JPS58182507U true JPS58182507U (en) 1983-12-05
JPH024495Y2 JPH024495Y2 (en) 1990-02-02

Family

ID=30087752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1982078546U Granted JPS58182507U (en) 1982-05-27 1982-05-27 Dual frequency signal generation circuit for cordless telephones

Country Status (1)

Country Link
JP (1) JPS58182507U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54160072U (en) * 1978-04-27 1979-11-08
JPS55179404U (en) * 1979-06-07 1980-12-23

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54160072U (en) * 1978-04-27 1979-11-08
JPS55179404U (en) * 1979-06-07 1980-12-23

Also Published As

Publication number Publication date
JPH024495Y2 (en) 1990-02-02

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