Title:
COMMUNICATION SYSTEM, SEMICONDUCTOR DRIVE DEVICE, AND POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/100005
Kind Code:
A1
Abstract:
Provided is a communication system with which highly reliable communication with low loss is implemented even in an inferior noise environment. The communication system (1) comprises a transmission unit (2), a receiving unit (3), and a signal transfer unit (4) for insulation communication between the transmission unit (2) and the receiving unit (3). The transmission unit (2) further comprises: a contiguous pulse generation unit (5) which generates a pulse signal string according to an input signal; an edge pulse generation unit (7) which generates an edge pulse at a rising edge and a falling edge of the input signal; an edge pulse drive unit (6) which transmits a pulse signal string at a first voltage level; and an edge pulse drive unit (8) which transmits an edge pulse at a second voltage level which is higher than the first voltage level. The receiving unit (3) further comprises: a contiguous pulse determination unit (9) which senses the pulse signal string; an edge pulse determination unit (10) which senses the edge pulse; and a decoded signal generation unit (11) which compares a decoded signal based on the output of the contiguous pulse determination unit (9) and a decoded signal based on the output of the edge pulse determination unit (10) and decodes the input signal.
Inventors:
ONDA KOHEI (JP)
SAKANO JUNICHI (JP)
SAKANO JUNICHI (JP)
Application Number:
PCT/JP2012/083776
Publication Date:
July 04, 2013
Filing Date:
December 27, 2012
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H04L25/493; H02M1/08; H02M7/5387; H04L25/02
Domestic Patent References:
| WO2004100473A2 | 2004-11-18 | |||
| WO2011018835A1 | 2011-02-17 |
Foreign References:
| JP2001513276A | 2001-08-28 | |||
| JP2003523147A | 2003-07-29 |
Attorney, Agent or Firm:
ISONO Michizo (JP)
Michizo Isono (JP)
Michizo Isono (JP)
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Claims: