JPS5963554U

JPS5963554U - wireless communication device

Info

Publication number: JPS5963554U
Application number: JP1982158821U
Authority: JP
Inventors: 本多　克彦
Original assignee: Fujitsu General Ltd
Current assignee: Fujitsu General Ltd
Priority date: 1982-10-20
Filing date: 1982-10-20
Publication date: 1984-04-26
Also published as: JPS639160Y2

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図は従来の無線通信機のブロック図、第２図は本考
案による無線通信機の第１実施例を示す電気回路図、第
３図は本考案の第２実施例を示す要部の電気回路画であ
る。１４・・・ノイズスケルチ回路、１５・・・トーンスケ
ルチ回路、２０・・・リミッタ回路、２３・・・レベル
切換回路、２４，２４ａ、　２４ｂ、　２６，２Ｂ、３
４−・・抵抗、２５．２７・・・ダイオード、３３・・
・トランジスタ。Fig. 1 is a block diagram of a conventional radio communication device, Fig. 2 is an electric circuit diagram showing a first embodiment of a radio communication device according to the present invention, and Fig. 3 is a main part showing a second embodiment of the present invention. It is an electrical circuit drawing. 14... Noise squelch circuit, 15... Tone squelch circuit, 20... Limiter circuit, 23... Level switching circuit, 24, 24a, 24b, 26, 2B, 3
4-...Resistance, 25.27...Diode, 33...
・Transistor.

Claims

[Scope of utility model registration request]

(1) In a radio communication device equipped with a tone squelch circuit that also uses a noise squelch circuit, a limiter circuit for setting an amplitude limit level provided in a decoder circuit of the tone squelch circuit; and a level switching circuit inserted between the noise squelch circuit and controlled to open and close by the output of the noise squelch circuit.

(2) Utility Model Registration Scope of Claims In the first paragraph, the limiter circuit is composed of a level setting resistor and a diode, and a level switching circuit is coupled to the level setting resistor to switch the resistance value to vary the level. A wireless communication device designed to

(3) In claim 2 of the utility model registration, the level switching circuit includes a transistor that is opened and closed by the output of the noise squelch circuit and a resistor connected in series with the transistor in parallel with the level setting resistor of the limiter circuit. A wireless communication device that combines a series circuit with

(4) In claim 2 of the utility model registration claim, the level switching circuit has a limiter circuit connected in series with two level setting resistors, and one of these resistors is connected in parallel with a noise control circuit. A wireless communication device consisting of a transistor connected to each other that is opened and closed by the output of a squelch circuit.

(5) Utility Model Registration Claim 3 or 4, the wireless communication device comprising a transistor inserted between the noise squelch circuit and the transistor to control opening and closing of the transistor.