Title:
CONSTANT CURRENT CIRCUIT
Document Type and Number:
Japanese Patent JP2012119946
Kind Code:
A
Abstract:
To provide a constant current circuit that can produce a normal output current even if the connection of an external resistor fails.
In the constant current circuit according to an embodiment mounted on a semiconductor integrated circuit, provided with a current mirror circuit 103 for generating an output current, and connected with an external resistance Rext at an external terminal 102 to generate a reference current Is supplied to the current mirror circuit 103, when an open state detection circuit 1 detects an open state of the external terminal 102, an alternative circuit 2 supplies an alternative current Ia equivalent to the reference current Is to the current mirror circuit 103.
Inventors:
SUZUKI ATSUHISA
Application Number:
JP2010268004A
Publication Date:
June 21, 2012
Filing Date:
December 01, 2010
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
H03F3/343
Attorney, Agent or Firm:
Masayuki Sunai
Fujiwara Yasutaka
Hajime Yamashita
Fujiwara Yasutaka
Hajime Yamashita
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