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Patent Searching and Data


Title:
INTERFACE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2011/074150
Kind Code:
A1
Abstract:
Provided is an interface circuit for conducting bidirectional data transmission between a host device and a sub device, wherein a function to make current consumption zero in standby state, and a stable start-up sequence are attained. The electric potential of a differential signal is pulled up to the electric potential of the power supply by a pull up element (4), in idle/standby state. Upon shifting to normal state, the common mode electric potential decreases gradually from the electric potential of the power supply, as the differential signal starts being outputted. When a level detector circuit (10) at the sub device (2) side detects that the common mode electric potential has become lower than a prescribed level, the interface circuit evaluates that a normal state has been attained, and starts the sub device (2).

Inventors:
KOMATSU, Yoshihide (())
小松義英 (())
EBUCHI, Tsuyoshi (())
Application Number:
JP2010/003702
Publication Date:
June 23, 2011
Filing Date:
June 03, 2010
Export Citation:
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Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真1006番地 Osaka, 〒5718501, JP)
KOMATSU, Yoshihide (())
小松義英 (())
International Classes:
H04L25/02; G06F3/00; H03K5/1252; H03K5/1254
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (Osaka-Marubeni Bldg, 5-7Hommachi 2-chome, Chuo-ku, Osaka-sh, Osaka 53, 〒5410053, JP)
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