JPS60132047U

JPS60132047U - wireless transceiver

Info

Publication number: JPS60132047U
Application number: JP1984018033U
Authority: JP
Inventors: 豊小川
Original assignee: 松下電工株式会社
Priority date: 1984-02-10
Filing date: 1984-02-10
Publication date: 1985-09-04

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 drawings]

第１図は本考案の実施例のブロック図、第２図は同上の
基本となる回路の具体回路図、第３図は同上の特性図、
第４図は同上の具体回路図、第、５図は同上のタイムチ
ャートである。１はマイクロフォン、２は変調回路、３はアンテナ、４
は出力回路、５は送信回路部、６は復調　　　。回路、７はスピーカ、′８は低周波増幅回路、９はノイ
ズスケルチ回路、１０は受信′回路部、１１はコントロ
ール回路、１２は急速充電回路、１９は電池、２０はア
クティブフィルタ、Ｃｏはコンデンサを示す。叫ｆｆ１Ｍ１Ｂ　　１ｍ＠− 三／１９ ≧　　　　　　　１４　　　　＼ −少Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a specific circuit diagram of the basic circuit of the above, Fig. 3 is a characteristic diagram of the same,
FIG. 4 is a specific circuit diagram of the same as above, and FIGS. 5 and 5 are time charts of same as above. 1 is a microphone, 2 is a modulation circuit, 3 is an antenna, 4
5 is the output circuit, 5 is the transmitter circuit, and 6 is the demodulator. circuit, 7 is a speaker, 8 is a low frequency amplifier circuit, 9 is a noise squelch circuit, 10 is a reception circuit, 11 is a control circuit, 12 is a quick charging circuit, 19 is a battery, 20 is an active filter, Co is a capacitor shows. Shout ff1M1B 1m@- 3/19 ≧ 14 \ -small

Claims

[Scope of utility model registration request]

a modulation circuit that modulates the input signal from the microphone;
A transmitter circuit section includes an output circuit that transmits the signal from the modulation circuit via the antenna, a demodulation circuit that demodulates the received signal received via the antenna, and a speaker that outputs the output signal from the demodulation circuit. The receiving circuit consists of a low-frequency amplification circuit that outputs, a noise squelch circuit that detects the calling signal from the antenna, and the power supply to each circuit by the detection output of the calling signal from the noise squelch circuit. In a wireless transmitter/receiver equipped with a power supply section having a battery for driving and capable of simultaneous two-way communication, an active filter that amplifies noise components from the demodulation circuit, and a capacitor that holds the output from the active filter at a low peak. A noise squelch circuit is constructed of a circuit that quickly charges the capacitor to a given sensitivity level or above in order to compare it with a hold voltage when power is applied, and a quick discharge means that quickly charges the capacitor and then quickly discharges it to a given sensitivity level. A wireless transmitter/receiver comprising: a control circuit that detects the presence or absence of an output signal from a noise squelch circuit from the time when power is applied to immediately before the end of power application, and controls the power from intermittent drive to full drive.