JPS60174359U

JPS60174359U - Electronics

Info

Publication number: JPS60174359U
Application number: JP6321484U
Authority: JP
Inventors: 正和森里
Original assignee: 三洋電機株式会社; 鳥取三洋電機株式会社
Priority date: 1984-04-27
Filing date: 1984-04-27
Publication date: 1985-11-19

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図は電子機器の外観を示す図、第２図は第１図の回
路構成を示す従来例のブロック図、第３図は本考案の回
路構成を示すブロック図、第４図、第５図、第６図は第
３図の動作波形を示す図である。１・・・・・・電子機器、４・・・・・・置台、６・・
・・・・ハンドゼット、１０・・・・・・スピーチネッ
トワーク回路、１２′　・・・・・・レベル検出回路、
１３・・・・・・制御回路。Fig. 1 is a diagram showing the external appearance of the electronic device, Fig. 2 is a block diagram of a conventional example showing the circuit configuration of Fig. 1, Fig. 3 is a block diagram showing the circuit configuration of the present invention, Figs. FIG. 6 is a diagram showing the operating waveforms of FIG. 3. 1... Electronic equipment, 4... Stand, 6...
... Handset, 10 ... Speech network circuit, 12' ... Level detection circuit,
13... Control circuit.

Claims

[Scope of utility model registration request]

In an electronic device such as a personal computer with a built-in telephone function, a means for connecting a terminal of a speech network circuit to which a speaker of a handset is connected to a power supply via a resistor, and a level detection circuit for detecting the voltage level of the terminal. a switch that is closed when the handset is inserted into a socket; a flip-flop that stores the state signal of the switch at the rising edge of the level detection circuit; and a match between the set output of the flip-flop and the output signal of the level detection circuit. A 6AND gate that detects the 6AND gate, and a switch that is opened and closed when the handset is on-hook and off-hook are provided on the stand on which the handset is placed, and the switch is connected in series between the speech network circuit and the speaker of the handset, and the switch on the stand when the handset is placed is connected in series between the speech network circuit and the speaker of the handset. An electronic device characterized in that an off-hook state of the handset is detected based on an output signal of the NΦ gate when the NΦ gate is closed.