JPH01162961U

JPH01162961U -

Info

Publication number: JPH01162961U
Application number: JP5253689U
Authority: JP
Priority date: 1989-05-06
Filing date: 1989-05-06
Publication date: 1989-11-14

Description

[Brief explanation of the drawing]

第１図は本考案の基礎となる構成の通信装置の
全体の系統図、第２図は或る提案された構成の動
作を説明するための波形図、第３図は本考案の一
実施例の送信機３のブロツク図、第４図は本考案
の一実施例の受信機４のブロツク図、第５図は第
３図および第４図に示された実施例の動作を説明
するための波形図である。１，２……送受信装置、３，５……送信機、４
，６……受信機、８……マイクロホン、９，１０
……プレストークスイツチ、１３，１７……処理
回路、１４……発光素子、１５……受光素子、１
６……受信回路、１８……スピーカ、２１……フ
リツプフロツプ、２２……ＡＮＤゲート、２５…
…リレー。 Fig. 1 is an overall system diagram of a communication device with a configuration that is the basis of the present invention, Fig. 2 is a waveform diagram for explaining the operation of a certain proposed configuration, and Fig. 3 is an embodiment of the present invention. 4 is a block diagram of a receiver 4 according to an embodiment of the present invention, and FIG. 5 is a block diagram for explaining the operation of the embodiment shown in FIGS. 3 and 4. FIG. 1, 2... Transmitting/receiving device, 3, 5... Transmitter, 4
, 6...Receiver, 8...Microphone, 9,10
...Press talk switch, 13, 17... Processing circuit, 14... Light emitting element, 15... Light receiving element, 1
6... Receiving circuit, 18... Speaker, 21... Flip-flop, 22... AND gate, 25...
…relay.

Claims

[Claims for Utility Model Registration] It has a pair of transmitting and receiving devices 1 and 2, and each of the transmitting and receiving devices 1 and 2 has transmitters 3 and 5 and receivers 4 and 6, and the receivers 4 and 6 have , and interconnected by lines 7, each transmitter 3,5 is responsive to the output of the press talk switch 9,11, the microphone 8,10, and the press talk switch 9,11. 11, a start signal is obtained by pulse code modulating the carrier wave for a predetermined first time period W3, and is repeated several times to derive the start signal.
Subsequently, an audio modulation signal is derived by modulating the carrier wave with the audio signal from the microphone 8, and the carrier wave is pulse code modulated for a predetermined second time W4 by releasing the press talk switches 9 and 11. a processing circuit 13 that repeats and derives a completed end signal a plurality of times; and an emitting means 1 that emits the start signal, audio modulation signal, and end signal from the processing circuit 13 using infrared light.
4, the receivers 4 and 6 each include a light receiving element 15 for receiving the infrared light from the emitting means 14, a flip-flop 21, and an AND gate 22 to which one level set output of the flip-flop 21 is given to one input. Then, in response to the output from the light receiving element 15, a start signal is determined and the flip-flop 21 is set, an end signal is determined and the flip-flop 21 is reset, and a start determination period t is started during which the start signal is determined.
2 to t3 and the end determination period t5 to t6 in which the end signal is determined, the signal at the other level is derived,
And during periods t3 to t5 other than the start determination period and the end determination period, a signal of one level is derived and the AN
Receiving means 16 applied to the other input of D gate 22
, 23, and the speaker 18; in response to the output of one level from the AND gate 22, demodulates the audio modulation signal during the period when the output of the AND gate 22 is at one level;
The demodulated signal is sent out through the line 7 to enter the transmitting operation state, and during the period when the output of the AND gate 22 is at the other level, the signal through the line 7 is turned into sound by the speaker 18. A communication device characterized in that it includes means 17, 24-27 for being in a state.