Title:
ANALOG CURRENT OUTPUT CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2010/073401
Kind Code:
A1
Abstract:
It is possible to provide an analog current output circuit which can reduce a power loss when a load to be connected has a small resistance value and can assure a high-speed response when the load to be connected has a large resistance value. The rise start position and inclination of the internal control voltage Va are set so that the load terminal voltage Vb obtained when a load (3) to be connected has a resistance value in the vicinity of the center of the specification range intersects an analog output current at its maximum value. A switch (8) performs control based on a comparison result obtained by a comparator (11) as follows. When an internal control voltage Va is smaller than a load terminal voltage Vb, a DC/DC converter (1) is controlled to input a high reference voltage H so that an output transistor (2) outputs a high power supply voltage VccH. When the internal control voltage Va is greater than the load terminal voltage Vb, the DC/DC converter (1) is controlled to input a low reference voltage L so that the output transistor (2) outputs a low power supply voltage VccL.
Inventors:
SAITO SEIICHI (JP)
NOMOTO HIROKAZU (JP)
AKEBOSHI YOSHIHIRO (JP)
NOMOTO HIROKAZU (JP)
AKEBOSHI YOSHIHIRO (JP)
Application Number:
PCT/JP2008/073836
Publication Date:
July 01, 2010
Filing Date:
December 26, 2008
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
SAITO SEIICHI (JP)
NOMOTO HIROKAZU (JP)
AKEBOSHI YOSHIHIRO (JP)
SAITO SEIICHI (JP)
NOMOTO HIROKAZU (JP)
AKEBOSHI YOSHIHIRO (JP)
International Classes:
G05F1/56; H02M3/00
Foreign References:
| JP2002320380A | 2002-10-31 | |||
| JPH1141825A | 1999-02-12 | |||
| JP2008108119A | 2008-05-08 | |||
| JP2000252754A | 2000-09-14 |
Other References:
See also references of EP 2372887A4
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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