Title:
ガス保安装置の通信回路
Document Type and Number:
Japanese Patent JP7203359
Kind Code:
B2
Abstract:
To provide a communication circuit for a gas security device with integrated circuit configuration of one-to-one communication circuit and bus communication circuit.SOLUTION: The communication circuit for a gas security device includes: a positive electrode communication terminal DT/U1; a negative electrode communication terminal SG/U2; a DC voltage source VDD; an enable circuit ENC; a transmit circuit TXC; and a receiving circuit RXC1. The enable circuit ENC includes an enable switch SW3 that connects a Schottky barrier diode SD and an enable resistor R4 in series between the positive electrode communication terminal DT/U1 and the DC voltage source VDD. The receiving circuit RXC1 includes: a first receive resistance R1; a second receive resistance R2; and a resistance changeover switch SW1 that selects a first receive resistance R1 and a second receive resistance R2 and connects the same between the positive electrode communication terminal DT/U1 and the negative electrode communication terminal SG/U2.SELECTED DRAWING: Figure 1
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Inventors:
Satoshi Uasako
Yusuke Yaki
Hiromi Anan
Takashi Kayaba
Nakamura Eiji
Yusuke Yaki
Hiromi Anan
Takashi Kayaba
Nakamura Eiji
Application Number:
JP2020014347A
Publication Date:
January 13, 2023
Filing Date:
January 31, 2020
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
H04L25/02
Domestic Patent References:
| JP2019528644A | ||||
| JP1157153A | ||||
| JP2008072168A | ||||
| JP2122730A | ||||
| JP9065448A |
Foreign References:
| US20040263232 | ||||
| US20190018467 | ||||
| CN209181836U |
Attorney, Agent or Firm:
Hokuto Patent Attorneys Office