EP 1230683 A4 20060517 - I2C OPTO-ISOLATOR CIRCUIT
Title (en)
I2C OPTO-ISOLATOR CIRCUIT
Title (de)
I2C OPTO-ISOLATOR-SCHALTUNG
Title (fr)
CIRCUIT OPTO-ISOLATEUR 12C
Publication
Application
Priority
- US 0041694 W 20001027
- US 16231499 P 19991028
Abstract (en)
[origin: WO0139515A2] An opto-isolator circuit for providing isolation between a bi-directional, I2C transmission line and a pair of single-direction transmission lines. The opto-isolator circuit includes a bi-directional port for receiving data from, and providing data to, the bi-directional transmission line. The circuit further includes an output path that has (i) a first buffer for receiving outgoing data from the bi-directional port, (ii) a first opto-isolator for receiving the outgoing data from an output of the first buffer, and (iii) a second buffer for receiving the outgoing data from an output of the first opto-isolator and providing the outgoing data to an output port. The circuit also includes an input path, that has (i) a third buffer for receiving incoming data from an input port, (ii) a second opto-isolator for receiving the incoming data from an output of the third buffer, and (iii) a fourth buffer for receiving the incoming data from an output of the second opto-isolator. The fourth buffer provides the incoming data to the bi-directional port such that characteristics of the incoming data are compatible with I2C characteristics.
[origin: WO0139515A2] An opto-isolator circuit (100) for providing isolation between a bi-directional, I2C transmission line and a pair of single-direction transmission lines (32, 34). The opto-isolator circuit (100) includes a bi-directional port (102) for receiving data from, and providing data to, the bi-directional transmission line. The circuit further includes an output path that has (i) a first buffer (108) for receiving outgoing data from the bi-directional port (102), (ii) a first opto-isolator (110) for receiving the outgoing data from an output of the first buffer (108), and (iii) a second buffer (112) for receiving the outgoing data from an output of the first opto-isolator (110) and providing the outgoing data to an output port (104). The circuit also includes an input path, that has (i) a third buffer (114) for receiving incoming data from an input port (106), (ii) a second opto-isolator (116) for receiving the incoming data from an output of the third buffer (114), and (iii) a fourth buffer (118) for receiving the incoming data from an output of the second opto-isolator (116). The fourth buffer (118) provides the incoming data to the bi-directional port (102) such that characteristics of the incoming data are compatible with I2C characteristics.
IPC 8 full level
H01L 31/12 (2006.01); G06F 13/40 (2006.01); H04B 10/80 (2013.01); H04L 25/26 (2006.01)
CPC (source: EP KR)
H01P 1/32 (2013.01 - KR); H04B 10/802 (2013.01 - EP); H04L 25/26 (2013.01 - EP)
Citation (search report)
- [A] FR 2600476 A1 19871224 - HEWLETT PACKARD FRANCE SA [FR]
- [A] US 5406091 A 19950411 - BURBA JOSEPH C [US], et al
- [A] US 4282604 A 19810804 - JEFFERSON WILLIAM T
- [X] KUHNKE F K: "BIDIRECTIONAL I2C BUS ISOLATOR", ELECTRONICS WORLD, NEXUS MEDIA COMMUNICATIONS, SWANLEY, KENT, GB, vol. 100, no. 1704, 1 November 1994 (1994-11-01), pages 920, XP000477703, ISSN: 0959-8332
- [X] XIA Y: "OPTICALLY ISOLATED I2C INTERFACE", ELECTRONICS WORLD, NEXUS MEDIA COMMUNICATIONS, SWANLEY, KENT, GB, vol. 104, no. 1752, December 1998 (1998-12-01), pages 1018, XP000880680, ISSN: 0959-8332
- [A] WIEMANN: "Bussysteme", BUSSYSTEME, 1984, pages 102 - 102, XP002260915
- See references of WO 0139515A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0139515 A2 20010531; WO 0139515 A3 20011025; AU 3967901 A 20010604; EP 1230683 A2 20020814; EP 1230683 A4 20060517; JP 2003530685 A 20031014; KR 20020041463 A 20020601; MX PA02002773 A 20030128; TW 548998 B 20030821
DOCDB simple family (application)
US 0041694 W 20001027; AU 3967901 A 20001027; EP 00992226 A 20001027; JP 2001540535 A 20001027; KR 20027004937 A 20020418; MX PA02002773 A 20001027; TW 89122848 A 20001030